Configurator Commercial code/product Codes and accessories... 6 Architecture... 7

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2 Table of contents Configurator Configurator Commercial code/product Codes and accessories... 6 Architecture Inputs/outputs pco3 large inputs/outputs µpc inputs/outputs pco large hardware specifications μpc hardware specifications μpc-pco3 power supply Probes pgd1 Terminal hardware specifications Backlight Routing of the pgd1 terminal Routing of the pco Modbus electrical connection Generality Versions for 2 pipes system Versions for 4 pipe system Refrigerant circuit diagrams pipe NRP (total recovery) pipe NRP plus sanitary fittings (total recovery) User Interface pgd1 graphic terminal Card boot Main masks Main Menu (Prg Key) Function not available In / Out menu General On/Off menu System/Cold side menu Recovery / hot side menu Time menu Timetable Support menu Language Info System / Cold side Recovery / Hot Side Fans Pumps Counter Forcing Options C.Impianto Miscellaneous In - out Support Manufacturer Menu Alarm Conf CHILLER Conf Recovery Conf Defrost Probes Conf Compressors Conf Miscellaneous Default Main Functions pipes + sanitary ware functioning diagrams pipes functioning diagrams pipe + recovery machine pipe machine Operating modes Mode change conditions during summer operation Mode change conditions during Winter operation Water regulation Proportional + Integral Control Differential automatic calculation Plant/recovery Pull-down management Bypass / VIC valves Gas circuit alarms Water side alarms Water side prevention Machine operating limits Compressor management Circuit rotation management Pag. 2/76 Pag. 2/76

3 Power distribution Compressor rotation management Type of compressor rotation Timeschedule-operated compressors Alarm Management Power allocation Compressor timetables Compressor powers chart Chiller climate curve Pump management Pipes antifreeze Fan management Fan proportional control Fan climate curve Joint or separate ventilation Fan antifreeze management Defrost Minimum conditions necessary to begin defrost Defrost start Defrost for decay Defrost start due to a blackout Defrost Defrost end Joint or separate ventilation Defrost Cycle Fan management during defrost Defrost Not available Dynamic Force Off (Hot) Prevent Frost protection High inlet temperature alarm Flowswitch Low-load control History PVT Testing and parameterization Upload card pco and µpc with smartkey Testing Procedure Termination procedure Appendix A. Main mask Appendicx B. Menù general On/Off Appendix C. Menù Impianto/ cooling side Appendix D. Menù recovery/ heatin side Appendix E. Status inputs and outputs Appendix F. Menù Service -Various Appendix G. Menù Service-Manual Appendix H. Sizes 1404, 1504, Plant config \ Alarms Alarm history Alarm list BMS Supervision addresses Spare parts codes Pag. 3/76 Pag. 3/76

4 Configurator Pag. 4/76 Pag. 4/76

5 Configurator Pag. 5/76 Pag. 5/76

6 1.1.1 Commercial code/product Codes and accessories Configuration fields: NRP Size Compressors Version Plant type Batteries Fans Power supply Plant pumps Recovery pumps SIZE 028, 030, 033, 035, 050, 055, 060, 065, 070, 075, 080, 090, 100, 125, 140, 150, 165, 180, 200, 225, 250, 280, 300, 330, 360 Compressor Version 0 Standard compressors R410A A High Efficiency E Low noise high efficiency Plant type 2 Two pipes (Chiller plus heat pump plus recovery ) 4 Four pipes (chiller plus recovery) Batteries Made of aluminum R Made of copper S Made of tinned copper V Made of copper varnished aluminum (epoxy paint) Fans Standard M Oversized ( only) J Oversized inverters( only) Power supply 400V 3 50Hz with circuit breakers 1 230V 3 50Hz with circuit breakers 2 500V 3 50Hz with circuit breakers Plant hydronic 00 Without accumulation and pumps unit 01 Low head accumulation and main side single pump 02 Low head accumulation and main side reserve pump 03 High head accumulation and main side single pump 04 High head accumulation and main side reserve pump 05 Accumulation + holes for additional low head resistances and main side single pump 06 Accumulation + holes for additional low head resistances and main side reserve pump 07 Accumulation + holes for additional high head resistances and main side single pump 08 Accumulation + holes for additional high head resistances and main side reserve pump P1 no accumulation with low head main side pump P2 no accumulation with low head pump and main side reserve pump P3 no accumulation with high head main side pump P4 no accumulation with high head pump and main side reserve pump Recovery hydronic unit 00 Without accumulation and pumps R1 no accumulation with low head recovery side pump R2 no accumulation with low head pump and recovery side reserve pump R3 no accumulation with high head recovery side reserve pump R4 no accumulation with high head pump and recovery side reserve pump Parameters affected 200< NRP <750 Presence of common probe rec. NRP >80 = separate condensation, separate defrosting, enable probe rec.2, enable common probe recovery enable rec. time reg. common output NRP <35 = 1 compressor per circuit 60<NRP<125 = 2 compressors per circuit NRP>=150 = 3 compressors per circuit See Compressors power table A= Set condensation 17.0bar A= Condensation differential 12.0bar A= condensation regulation = prop E= Set condensation 28.0bar E= Condensation differential 8.0bar E= condensation regulation = P+I NRP 2 = Ch/HP + recovery, defrost on CH NRP 4 = cold side+hot side defrost on Rec 01,03,05,07,P1,P3 = one plant pump only 02,04,06,08,P2,P4= 2 plant pumps R1,R3 = one plant pump only R2, R4 = 2 plant pumps Item PGD1 AER485P1 Accessory description Remote panel. Remotable up to 500 m with TWISTED-PAIR cable + shielded-pair SCREEN and TCONN6J000. RS-485 interface for supervision systems with MODBUS protocol. Pag. 6/76 Pag. 6/76

7 Architecture The cards comunicate trough an internal connection modbus between PCO3 and micropc Modbus outlet RS485 for BMS Pag. 7/76 Pag. 7/76

8 2 Inputs/outputs The basic configuration consists of a pco3 large board. In addition, you can handle a variety of accessories via a μpc board. 2.1 pco3 large inputs/outputs DIGITAL outputs Master NO1 Compressor1 circuit 1 (CC1) NO2 Compressor2 circuit 1 (CC1A) NO3 Compressor1 circuit 2 (CC2) NO4 Compressor2 circuit 2 (CC2A) NO5 Liquid shut off valve circuit 1 (VS1) NO6 Liquid shut off valve circuit 1 (VS2) NO7 (exchange) Pump 1 evaporator NO8 Critical alarm NO9 Pump 2 evaporator NO10 Fan 1 condenser NO11 Fan 2 condenser NO12 Reverse cycle valve plant 1(VIC1 ) NO13 Reverse cycle valve recovery 1(VIR1) NO14 Reverse cycle valve plant 2(VIC2 ) NO15 Reverse cycle valve recovery 2(VIR2) NO16 Antifreeze protection NO17 Liquid shut off valve circuit 2 (VS1) NO18 Liquid shut off valve circuit 2 (VS2) DIGITAL inputs Master ID1 High pressure circuit 1 ID2 Low pressure circuit 1 ID3 On/off remote ID4 Heat/Cold remote ID5 Evaporator flow switch ID6 Circuit breaker CP1 circuit 1 (MT1) ID7 Circuit breaker CP2 circuit 1 (MT1A) ID8 Phase monitor alarm ID9 High pressure circuit 2 ID10 Low pressure circuit 2 ID11 Circuit breaker CP1 circuit 2 (MT2) ID12 Circuit breaker CP2 circuit 2 (MT2A) ID13 Circuit breaker pump 1 evaporator ID14 Circuit breaker pump 2 evaporator ID15 Circuit breaker fan 1 ID16 Circuit breaker fan 2 ID17 ID18 Enabling multi function input ANALOG outputs Master Y1 (0 10V) Y2 (0 10V) Evaporator modulating pump Y3 (0 10V) Modulating fan 1 Y4 (0 10V) Modulating fan 2 ANALOG inputs Master B1 High pressure circuit 1 B2 Low pressure circuit 1 B3 Evaporator water outlet temperature B4 Evaporator water inlet temperature B5 Gas discharge temperature (PT1000) Circuit1 B6 High pressure circuit 2 B7 Low pressure circuit 2 B8 Multi-function input B9 Outside air temperature B10 Gas discharge temperature (PT1000) Circuit2 Pag. 8/76 Pag. 8/76

9 1.1 µpc inputs/outputs DIGITAL outputs Master NO1 Recovery pump 1 NO2 Recovery pump 2 NO3 Compressor 3 circuit 1 (CC1B) NO4 Compressor 3 circuit 2 (CC2B) NO5 Recovery solenoid valve circuit 1 (VS R) NO6 Recovery solenoid valve circuit 2 (VS R) NO7 (scambio) Battery solenoid valve circuit 1 (VS B) NO8 Battery solenoid valve circuit 2 (VS B) NO9 Evaporator solenoid valve circuit 1 (VS E) NO10 Evaporator solenoid valve circuit 2 (VS E) NO11 VBY circuit1 NO12 VBY circuit2 DIGITAL inputs ID1 Flow recovery ID2 Circuit breaker recovery pump 1 ID3 Circuit breaker recovery pump 2 ID4 Circuit breaker CP3 circuit 1 (MT1B) ID5 Circuit breaker CP3 circuit 2 (MT2B) ID6 On/off remote Sanitary fittings ID7 Enables second heating set point Sanitary fittings ID8 ID9 ID10 ANALOG outputs Y1 (0 10V) Y2 (0 10V) Y3 (0 10V) Y4 (0 10V) ANALOG inputs B1 (NTC) Inlet water temperature recovery B2 (NTC) Outlet water temperature recovery 1 B3 (NTC) Common evaporator outlet water temperature (Master/Slave) B4 (NTC) Common outlet water temperature recovery (Maste/Slave) B5 (NTC) Domestic hot water storage temperature (an optional) B6 (NTC) Outlet water temperature recovery 2 B7 (NTC) Liquid temperature (defrost end) Circuit 1 B8 (NTC) B9 (NTC; NTC HT;) B10 (NTC) Liquid temperature (defrost end) Circuit 2 B11 (0 5V) B12 (0 5V) Pag. 9/76 Pag. 9/76

10 1.1 pco large hardware specifications During installation, we recommend using a 50 VA Class II safety transformer, for the supply of just one pco3. We recommend to separate the pco3 and terminal (or multiple pco3 and terminals) control power supply from the other electrical devices' supply (contactors and other electromechanical components) inside the electric panel. If the secondary of the transformer is grounded, make sure that the ground cable is connected to clamp G0. This is true for all devices connected to the pco3. The pco3 board has a working range of -25 C up to +60 C Pag. 10/76 Pag. 10/76

11 1.2 μpc hardware specifications μpc-pco3 power supply The electronics in the NRP is a pco3 large board and a Carel μpc. These are powered by 24 volts, alternating or continuous. We recommend to separate the power supply of the electronic control from the other electric devices' supply (contactors and other electromechanical components) inside the electric panel Probes All very low-voltage connections (Analog and digital inputs at 24 Vac / Vdc, analog outputs, serial bus connections, power supplies) must have a reinforced or double insulation compared to the network. If the product is installed in an industrial environment (application of the EN regulations), the length of the connections must be lower than 30 m. In any case, it is not recommended to exceed this length in order not to have measurement errors. Pag. 11/76 Pag. 11/76

12 Ohmic value NTC sensors Pag. 12/76 Pag. 12/76

13 1.1 pgd1 Terminal hardware specifications The terminal can be remoted up to 50 m using a telephone cable, while using a shielded-pair cable, a TCONN6J000 and separate power supply it can be remoted up to 500 m. Note: If the terminal is used in a domestic environment, the cable must always be shielded. Cable type Distance Supply Telephone 50 m taken from pco (150 ma) Shielded cable AWG m taken from pco (150 ma) Shielded cable AWG20/ m separate power supply via TCONN6J000 The pgd1 terminal may operate at temperatures ranging from -20 C to 60 C Backlight The display mounted in the pgd1 panel presents backlight that is normally off, its activation is linked to key press and remains lit throughout the time of use of the small panel. Its switching-off occurs after 3 minutes of idle time. The lighting of the LCD is turned on also with an alarm event to emphasize it and attract the user's attention. The alarm is signaled by the red led below the ALARM key. To adjust the display contrast, simultaneously press the ALARM + PRG keys and use the keys to increase or decrease the contrast Routing of the pgd1 terminal If you connect two pgd1 terminals to the same card, you must assign to the second terminal an address different from the former. The default address of the pgd terminal is 32. If you want change address you must: 1. Connect the pgd1. 2. Press simultaneously the keys (terminal on) for at least 5 seconds; 3. Wait until the mask in the figure is displayed 4. by pressing the key once, the cursor will move to the address field (nn) 5. Change the address of the terminal (display address setting) through the keys selecting the desired value, and confirm by pressing the key. 6. If the selected value is different from the one saved previously, the mask shown on the left figure will appear and the new value will be stored in the permanent memory of the display. 7. Disconnect and reconnect the pgd Routing of the pco3 The procedure is as follows: 1. power the pco3, if you have not already done so; 2. prepare the pgd1 with address 0. (see previous paragraph); 3. disconnect all other devices connected in plan (terminal J11) 4. disconnect and reconnect the μpc 5. By simultaneously pressing the UP + ALARM keys 6. After a few seconds the following screen appears. 7. Use the UP and DOWN keys and then press ENTER to confirm. 8. Wait for 5 seconds, then set the pgd1 address to 32 Pag. 13/76 Pag. 13/76

14 1.1 Modbus electrical connection The pco Large board does not have enough Inputs Outputs to meet all features. Thanks to a port called "Field Bus", the NRP application is able to monitor several slaves in modbus protocol. The pco Large controls in Modbus the expansion of μpc inputs outputs. 3 Generality A multi-purpose unit is a chiller in heat pump with total recovery that, thanks to a particular architecture of the refrigerant circuit and adjustment logic evolved and suitable is able to satisfy both functions in different plant engineering and modulate independently the power output of each of them. Based on the functions handled plant multipurpose machines are divided into two categories: Multipurpose for four pipes system: comply with the request simultaneously cooling capacity of a system (circuit hydronic heating) and thermal power on another system (hydronic cooling circuit) simultaneously active Multipurpose for two pipe system: satisfy the contemporary power request of an air conditioning system 2 pipe (heat during the winter and cooling in summer) and heat output of a circuit intended for the production of sanitary hot water (in any season) From the functional point of view is equipped with two heat exchangers user side and a heat exchanger external side: One exchanger cooling user side, in which can take place only the evaporation in contact with the chilled water circuit One user side heat exchanger, in which can occur only the condensation in contact with the hot water circuit. An exchanger facing outwards (finned coil in the case of air-water machines) that depending on the load conditions on the loads, can act as a condenser or evaporator. The capacity of a multi-purpose machine 4 pipes to simultaneously meet the request of the circuit of the hot and cold circuit (whatever the proportion of the load on the two circuits) derives from the ability of its adjustment to switch the operation of its refrigerant circuits between the three modes following possible (with appropriate residence times in various states of operation) Pag. 14/76 Pag. 14/76

15 MODE 1 MODE 2 External exchanger External exchanger Exchang.heating circuit Exchang.heating circuit Exchang.cooling circuit Exchang.cooling circuit MODE 3 External exchanger Exchang.heating circuit Exchang.cooling circuit Versions for 2 pipes system The applications of air conditioning systems with a single sign (winter or summer) that require DHW throughout the year are typical of building structures of more traditional type (where prevails the masonry compared to glass) and with characteristics more typically residential use (hotels, communities, centralized systems for apartment buildings, etc.). From the constructive point of view is equipped with: a heat exchanger on the user circuit conditioning for 2-pipe system, operating in summer cooling or winter heating a heat exchanger to a dedicated circuit intermediate for the preparation of domestic hot water a heat exchanger facing the outside (finned coils) Pag. 15/76 Pag. 15/76

16 The operating modes are: SUMMER OPERATION 1. Cold water production plant 2. Production of hot domestic water with the use of total recovery (CYCLE ANTILEGIONELLA) WINTER OPERATION 3. Heat pump in the plant 4. Heat pump hot domestic water service Versions for 4 pipe system The multipurpose 4-pipe systems have been designed for applications such as terminal 4 pipe. For example shopping centers, offices, or with large windows, where there may be simultaneous demand for both cold and hot water, with a system that does not require seasonal switching and is therefore a viable alternative to traditional systems based on the combination of chiller - boiler. The control logic of the microprocessor mounted ensures the fulfillment of thermal loads and refrigerators. The operating modes are: PRODUCTION OF CHILLED WATER ONLY The NRP multipurpose acts like the classic chiller, chilled water plant, disposal of condensation heat to the outside through the finned coils. PRODUCTION OF HOT WATER ONLY The polyvalent behaves as a heat pump, using the heat of the outside air, through the finned coil (evaporator) raises the temperature of the water to be sent to the system through a plate heat exchanger (condenser). The main difference compared to conventional heat pumps in reverse cycle is that the heated water is produced in a heat exchanger different from that used for the production of cold water, this to keep separate the two sections hot cold necessary for plants to 4 tubes. COMBINED PRODUCTION In case the user requires at the same time hot water and chilled, the unit behaves as a heat pump water / water, managing the condensation and evaporation on two plate heat exchangers distinct and associated with the movement in the plant cold water and warm. The transition from one configuration to another is automatic (controlled by the microprocessor on board) trying to optimize the energy expenditure as a function of user demand Pag. 16/76 Pag. 16/76

17 2 Refrigerant circuit diagrams By properly configuring the parameters, you can get a variety of configurations. The following pages show some relevant examples pipe NRP (total recovery) VU VU V CN AL FD VT1A VS1A VU VIR VS1 IDL VS R VS-B VS-E RE VT1 VU VU VU VBR VU EV VU VT1 VT1A VS1 VS1A VSR1 VSB1 VSE1 VBR1 IDL VIR1 AL FD VSIC one-way valve thermostatic valve cold thermostatic valve heat solenoid valve cold solenoid valve heat solenoid valve recovery bleeding solenoid valve battery bleeding solenoid valve evaporator bleeding solenoid valve recovery bypass liquid indicator reversing valve recovery fluid accumulation with 3/4 indicator dehydrating filter safety valve 4-pipe NRP VIR VS1 VS1A VS-R VS-B VS-E VBR chiller OFF ON OFF ON OFF OFF OFF chiller + recovery ON ON OFF OFF ON OFF OFF recovery ON OFF ON OFF OFF ON OFF defrost OFF OFF OFF OFF OFF OFF ON Pag. 17/76 Pag. 17/76

18 2.2 2-pipe NRP plus sanitary fittings (total recovery) VU VU VU V AL CN VT1A FD VS1A VIR1 VS1 VS-E VS-R VU VS-B VIC IDL V-BY VT1 VU VU VU RE VU EV/CN VU VT1 VT1A VS1 VS1A VSR1 VSB1 VSE1 VBY1 IDL VIC1 VIR1 AL FD VSIC one-way valve thermostatic valve cold thermostatic valve heat solenoid valve cold solenoid valve heat solenoid valve recovery bleeding solenoid valve battery bleeding solenoid valve evaporator bleeding bypass solenoid valve liquid indicator reversing valve heat reversing valve recovery fluid accumulation with 3/4 indicator dehydrating filter safety valve 2-pipe NRP + SANITARY FITTINGS VIC1 VIR1 VS1 VS1A VS-R VS-B VS-E V-By chiller OFF OFF ON OFF ON OFF OFF OFF chiller + recovery OFF ON ON OFF OFF ON OFF OFF heat pump ON OFF OFF ON ON OFF OFF OFF recovery OFF ON OFF ON OFF OFF ON OFF defrost OFF OFF ON OFF ON OFF OFF ON Pag. 18/76 Pag. 18/76

19 3 User Interface 3.1 pgd1 graphic terminal The NRP unit control panel allows a quick setting of the operating parameters of the machine and their visualization. The display consists of a 132 x 64-pixel graphic matrix, reporting the type of operation, displaying the parameters set and any alarms occured. The card stores all default settings and any changes. With the installation of the PGD1 remote panel, you can replicate all functions and settings available on the machine at a distance. The meaning of the keys is: Alarm key: By pressing this key you can view the list of active alarms and the alarm history. If the LED under the key is lit, it means that there is at least one alarm. Prog key By pressing this key you activate the navigation through the menus; 3.2 Card boot Esc key By pressing this key you return to the previous window Up key When browsing menus/windows, it allows you to switch to the next menu/windows. Instead, when editing a parameter, it increases the value of the selected parameter. Down key When browsing menus/windows, it allows you to switch to the previous menu/windows. Instead, when editing a parameter, it decreases the value of the selected parameter Enter key (selection/confirmation) When browsing menus/parameters, it allows you to enter the selected menu/parameters and to get into edit mode. Instead, when editing a parameter, it confirms the changes to the selected parameter value On each restart due to a power failure, the Aermec logo is the first mask displayed. During these 6 seconds, the card stabilizes the probe readings and prepares for adjustment. As a second mask, the language selection menu is displayed. By pressing the ENTER key you can select the desired language. By pressing the ESC key you exit this mask and go to the main mask. 3.3 Main masks The main page gives several information to the user through icons. Below is a description of alerts. Meaning of the LEDs: Alarm LED: when it is turned on there is at least one alarm Season LED: if it is turned on, it means that it is in winter mode. by pressing the Enter key you access the NRP turn on/turn off Icon 1 row 2 row Meaning DATE TIME: day of the week, Plant outlet temperature and recovery heat exchanger inlet Inlet temperature and outlet water of the evaporator in summer and of the condenser in winter. Inlet temperature and recovery exchanger outlet water Plant or recovery required percentage. It provides a rough indication about the machine demand. It is activated when the pump is activated. Either of the plant or the recovery. The number at the bottom tells you which pump is turned on. Pag. 19/76 Pag. 19/76

20 Indicates that the antifreeze is active Indicates that the low outlet temperature antifreeze prevention is active. Stops the compressors. Indicates that the high outlet temperature prevention is active. Stops the compressors. Indicates that the flow switch is open, in this case the compressors are off and the pumps will attempt to unlock the flow switch. 8 row Compressors status of circuit1 "C1" or circuit2 "C2" Final row Indicates whether the compressor is: disabled, off, on or on alarm Indicates the status of the machine The different states of the circuit: State Value Meaning C1 C2 0 The system is active and working CH 1 Chiller CH+R 2 Chiller plus total recovery PC 3 Heat pump Rec 4 Total recovery AL 5 Alarms Defr 12,14, 15,17 Defrost active Wait 10,13 The circuit configuration is changing Ok 11 Setpoints reached The different states of the unit: State Value Meaning C1 C2 0,1 The system is active and working Unit off from alarm 2 There is a critical alarm stopping the system (check the alarm list, below the alarm key ) General Off from key 3 The system is off from the terminal, check On/Off mask Off from supervisor 4 The supervision system has inhibited the starting of the unit Off from time slots 5 The time slots set require the entire system off Off from digital input 6 The digital input (ID8) is closed and puts the system into Off Off from screen 7 The plant is off from the terminal. Check chiller mask Antifreeze 8 Action to prevent freezing inside the water exchangers Manual mode 9 Compressors or pumps are run through the mask By pressing the DOWN key the following screens will appear System status/cold side Currently working setpoint, please see the corresponding section for more details Currently working differential, please see the section "self-adaptive differential" Icon indicating whether: heat, cold Temperature value which you regulate the machine on If there is an active PID function, also the proportional factor "Er" and the integral factor "Ei" will be displayed Power percentage demand and power percentage actually active on the plant side Recovery state/hot side Currently working setpoint and current differential. Please see the corresponding section for more details Icon indicating recovery or hot side Mean temperature which you regulate the machine on If there is an active PID function, also the proportional factor "Er" and the integral factor "Ei" will be displayed Power percentage demand and power percentage actually active on the recovery side Storage tank status You can see the domestic water temperature produced and the temperature inside the storage tank indicates the required domestic hot water ( steps), anti-legionella active, It is activated when the recovery pump is active, the number below indicates which pump is on If you enable recovery adjustment with sanitary ware, the pump will start only if sanitary water is required. Subdivision of the request in the circuits. You can view the request to the two circuits and their status, Below you can figure out which compressor will start or stop and when exactly. Pag. 20/76 Pag. 20/76

21 3.4 Main Menu (Prg Key) By pressing the Prog key you access the main menu. Generally, the various menus are divided by type of device. IN/OUT ON/OFF SYSTEM / COLD SIDE Recovery / HOT SIDE TIME Status of various parts of the NRP system Unit, change of season and any time slots SYSTEM parameters (Chiller, PdC) in the "2-pipe" machine COLD SIDE parameters in the "4-pipe" machine Activations, rated set points and second set point, time slots, mode selection (2-pipe machine only ) RECOVERY parameters in the "2-pipe" machine HOT SIDE parameters in the "4-pipe" machine Activations, rated set points and second set point, time slots, temperature Date, time, change of Standard Time, DST SUPPORT Support (password 442) Manufacturer Manufacturer (password 202) To select the desired menu you must scroll the list of icons using the UP and Down keys. Once located it, confirm the choice by pressing the Enter key Function not available If a function is missing, you will see the following mask: To return to the main page, simply press the Escape button 3.5 In / Out menu In this menu you can get a summary on how the machine is operating. Mask Meaning Indicates the current outside air temperature In the last two rows you can view the minimum and maximum temperature recorded during the day and during the previous day. Displays the circuit status of circuit 1: 0 Off 10 Partialized Waiting 15 Waiting Defrost Outlet 1 Chiller only 11 Selected mode 16 Defrost outlet fan activation 2 Chiller+Rec 12 Defrost start 17 Defrost outlet 3 Heat pump 13 VIC Invers. Wait 18 No System Defrost 4 Recovery only 14 Defrost 19 No Rec. Defrost 5 Alarms The next operating mode change. The power requested to the circuit and the active one. Status of of compressors 1,2,3. Values can be: = Off Compressor Off = On Compressor On Min.On The compressor is On and with a minimum ignition time, on the right you can see when it will end Min.Off The compressor is Off and with a minimum shutdown time, on the right you can see when it will end Off alarm The compressor is Off due to an alarm, see Alarm key Pag. 21/76 Pag. 21/76

22 Displays the circuit status of circuit 1: see previous mask Ventilation 1. Summarizes the status of the fans and the sets and probes that control the fans. The last row is visible if ventilation is common between the two circuits. C1 Off The circuit is turned off C1 Press.Cond. The fans adjust to high pressure (condensation) C1 Chiller+Rec The fans are off because the machine is running water/water C1 Max. speed The fans are run at full speed because the outside temp. is below 30 C C1 Press.Evap The fans adjust to low pressure (evaporation) C1 Alarm Circuit on alarm Ventilation 2. Summarizes the status of the fans and the sets and probes that control the fans in case of a separate ventilation. This mask is visible only if ventilation is separated. Shows the defrost status of circuit 1 and 2 The circuit statuses can be: 0 Off 10 Partialized Waiting 15 Waiting Defrost Outlet 1 Chiller only 11 Selected mode 16 Defrost outlet fan activation 2 Chiller+Rec 12 Defrost Start 17 Defrost outlet 3 Heat pump 13 VIC Invers. Wait 18 No System Defrost 4 Recovery only 14 Defrost 19 No Rec. Defrost 5 Circuit on alarm The Delta parameter indicates the decline of low pressure. See the section about defrosting The defrost statuses can be 0 No DEF. No defrosting 1 Off Circuit turned off either from key, or from time slots, or from digital input 2 Def.Active Defrost active (the machine condenses in the ventilating battery) 3 On Smart Defrost started for decline 4 On Min LP Defrost started for reaching low pressure 5 On Reboot Defrost started after power blackout 6 On Force Defrost started for being forced by key or forced due to the start of another defrost cycle 7 On TGP Defrost started for high pressing gas temperature 8 End Liq.T Defrost ended for high liquid temperature 9 End Time Defrost ended for having reached time limit 10 End Force Defrost ended for being forced by key 11 Startup Cmp Defrost inhibited for compressors start-up waiting time 12 High P.Evap Defrost inhibited for high evaporation pressure 13 High T.Ext Defrost inhibited for high external temperature 14 T.Bw Def. Defrost inhibited for waiting time between two defrost cycles 15 Alarms Circuit on alarm 16 On from Alarm Defrost started for all-clear Displays the status of the valves in circuit 1 HP High pressure LP Low pressure LiqT Liquid temperature TgP Discharge gas temperature Fan Fan speed vic Reverse cycle valve plant side vir Reverse cycle valve recovery side Vs1 Solenoid valve 1 Vs1a Solenoid valve VsB Fans battery bleeding valve VsR Battery exchanger bleeding valve VsE System exchanger bleeding valve By Defrost bleeding valve Compressors status Off On Also, by pressing the Enter key you will see the temperatures converted from pressures. See previous mask Pag. 22/76 Pag. 22/76

23 3.6 General On/Off menu 3.7 System/Cold side menu The first two rows describe in which modes are the plant and the recovery or cold/hot side 1 Enabled The system adjusts to the main probe according to the system setpoint 2 Off for alarm System / recovery off for critical alarm 3 General Off System / recovery off by general activation 4 Off by BMS System / recovery off by supervisory system 5 Off by time System / recovery off by time slots 6 Off by dig.inp. System / recovery off by digital input (ID8) 7 Off by display The system is off by terminal. Check system / recovery screen 8 Antifreeze System / recovery run by force for antifreeze protection In the last row you can change the unit status: Off (the whole system will be put on stand-by) ON (the machine is turned on) Please note that the values displayed in the masks match the defualt ones System mode setup: Off The system does not produce cold / hot water ON The system adjusts to the main probe according to the system setpoint On with set2 The system adjusts to the main probe according to setpoint 2 Time slots The system adjusts only when the time slots are active. Select mode (2-pipe machine only): Cooling The system produces cold Heating The system produces heat By Ext.temp. According to the outside temperature, summer or winter mode is selected (s24) By Dig.Input If the digital contact closes, the heating mode is selected By Superv. The BMS system controls remotely By Timetable Heating mode is selected by timetable Setpoint 1 Setup Cold water production setpoint Hot water production setpoint (2 pipes only) Setpoint 2 Setup Cold water production setpoint Hot water production setpoint (solo 2 tubi) (4 tubi) These parameters are used if the second setpoint is enabled System time slot parameters. The possible selections are ON System On with setpoint 1 (nominal) SET2 System On with setpoint 2 OFF The unit is Off. You can enter up to 4 time slots per day, divided by the 7 days of the week (4 tubi) In this mask you can copy the settings of one day on another day or on all other days. The possible selections are: Sunday... Saturday or all. Each program has 8 days and each day has four time slots in which you can set the start and shutdown time, the setpoint 2 or On/Off. Outside these 4 time slots, the program will turn the system off. ON (set 1) Set 2 Set 2 ON (set 1) a-on a-off b-on b-off c-on c-off d-on d-off 00:00 24:00 In this mask you can select the outside temperature at which you want to enable heating or cooling. In the support menu there is a differential. If the temperature is within the two sets and the differential, the machine will be turned off. (NOT in this version) This mask is visible only if set "By Ext.temp." in mask S3 In this mask you can select in which day of the year you want to run the mode of operation. If the machine is not in heating mode (winter) then it is in cooling mode (summer). Pag. 23/76 Pag. 23/76

24 3.8 Recovery / hot side menu Please note that the values displayed in the masks match the defualt ones Recovery mode setup Off The NRP does not produce recovery hot water YES The recovery adjusts to the main probe according to the setpoint On with The recovery adjusts to the main probe according to setpoint set2 2 Time slots The recovery adjusts only when the time slots are active. Recovery setpoint settings System time slot parameters. The possible selections are ON System On with nominal setpoint SET2 System On with setpoint 2 OFF The unit is Off. You can enter up to 4 time slots per day, divided by the 7 days of the week In this mask you can copy the settings of one day on another day or on all other days. The possible selections are: Sunday... Saturday or all. 3.9 Time menu In the first page of this menu you can change the system time. The system time is kept even when the machine is turned off. Anyway, It is a good idea to regularly check that the time is set correctly. In this mask you can enable the automatic change from standard time to DST Timetable Please note that the values displayed in the masks match the defualt ones Allows on certain days of the year to turn off or turn on the whole machine. There are 5 possible events. Each event has a start and end date, and you can select whether to turn off the system or enable a holiday for the whole system. During the holiday a particular time slot called "holiday" is enabled. For example, during holiday you may enable the special opening of the store/building where the machine is located. Pag. 24/76 Pag. 24/76

25 3.11 Support menu The support mask group is protected by a password. In fact, the first mask for accessing the support section is a password prompt The default password is 442, but you may change it by the User section. If the password is wrong you will receive an error message. The password displayed will be set to 0 after 5 minutes of inactivity of the user terminal. By entering the correct password you access the Support menu Please note that the values displayed in the masks match the defualt ones After entering the support section you will be faced with a new menu with the following options icon text description LANGUAGE Language selection, enabling language change display after card reboot INFO SYSTEM COLD SIDE RECOVERY HOT SIDE VENTILAT. PUMPS COUNTER FORCINGS OPTIONS C.SYSTEM MISCELLANEOUS IN/OUT Software version SYSTEM parameters (Chiller, PdC) in the "2-pipe" machine COLD SIDE parameters in the "4-pipe" machine Differential, adjustment type RECOVERY parameters in the "2-pipe" machine HOT SIDE parameters in the "4-pipe" machine Differential, adjustment type Setpoint, differential, adjustment type, operation in heat pump, chiller. Adjustment type, On / Off delays, pump parameters Device times, timer setup, alarm set timer, last defrosting time Pump forcing, compressors disabling, BMS config., multi-function input enabling Chiller type, recovery type, number of circuits, number of compressors, probes and digital inputs enabling, Password customization Detailed status of all inputs and outputs Pag. 25/76 Pag. 25/76

26 Language Display description Description Value description UOM Min Max R/W Allows you to change the language from 0. English RW Italian to English 1. Italian Allows you to turn off the mask for changing language at start-up Visualization time of the language change mask at start-up 0. No 1. Yes RW s RW Info Display description Description Value description UOM Min Max R/W Machine code See section on testing R Software version Date on which testing was performed. It is not the manufacturing date System / Cold side Display description Description Value description UOM Min Max R/W Adjusting the input or output 0: INPUT (probe B4) 1: OUTPUT (probe B3) 2: COMMON OUTPUT (probe B3, upc) 0 2 R/W Type of cooling setpoint 0: FIXED SETPOINT 0 1 R/W 1: CLIMATE CURVE Cold adjustment differential C R/W In case of automatic differential it is not considered Adjustment Type 0: PROPORT. 0 1 R/W 1: PROP.+INT. Cold integration time R/W Type of heating setpoint 0: FIXED SETPOINT 0 1 R/W 1: CLIMATE CURVE Heat adjustment differential C R/W In case of automatic differential it is not considered Adjustment Type 0: PROPORT. 0 1 R/W 1: PROP.+INT. Heat integration time R/W COLD climate curve, allows you to change the set C R according to the outside temperature Minimum outside temperature C R/W Maximum outside temperature C R/W Compensation: a setpoint = setpoint Compensat. C R/W will be calculated to the maximum external temperature. HEAT climate curve, allows you to change the set C R according to the outside temperature Minimum outside temperature C R/W Maximum outside temperature C R/W Compensation: a setpoint = setpoint Compensat. C R/W will be calculated to the maximum external temperature. The adjustment differential is calculated according to 0. No 0 1 R/W the system inlet and outlet temperatures 1. Yes Differential calculation delay after the machine is at min R/W full load. Calculated differential minimum limit C 0, R/W Calculated differential maximum limit C 0, R/W Pag. 26/76 Pag. 26/76

27 Display description Description Value description UOM Min Max R/W Current differentials calculated. These are updated C 0, R/W every time the machine is at full capacity (full load) Used to limit the system power by putting a limit to the thermostat Eg If the limit is 99%, then the last compressor will never activate. Cold maximum limit % R/W Heat maximum limit % R/W Neutral zone differential C 0,0 9.9 R/W Recovery / Hot Side Display description Description Value description UOM Min Max R/W Adjusting the input or output 0: INPUT (probe B1,µPC) 1: OUTPUT (probe B2,µPC) 2: COMMON OUTPUT (probe B4, µpc) 0 2 R/W Setpoint type 0: FIXED SETPOINT 1: CLIMATE CURVE 0 1 R/W Adjustment differential R/W C In case of automatic differential it is not considered Recovery adjustment type 0: PROPORT. 1: PROP.+INT. R/W Additional factor s R/W Climatic curve, allows you to change the set C R according to the outside temperature Minimum outside temperature C R/W Maximum outside temperature C R/W Compensation: a setpoint = setpoint C R/W Compensation will be calculated to the maximum external temperature The adjustment differential is calculated according 0. No 0 1 R/W to the system inlet and outlet temperatures 1. Yes Differential calculation delay after the machine is at min R/W full load. Calculated differential minimum limit C 0, R/W Calculated differential maximum limit C 0, R/W Current differentials calculated. These are updated every time the machine is at full capacity (full load) C 0, R/W Used to limit the recovery power if the machine is satisfying the recovery. Heat maximum limit % R/W Neutral zone differential C 0,0 9.9 R/W Pag. 27/76 Pag. 27/76

28 Fans Display description Description Value description UOM Min Max R/W C R/W Fans are sped up according to the outside temperature. Over 30 C, fans begin modulating according to the evaporation pressure Non silenced fans: always at 100% below 30 C. Silenced fans: sped down to 60% between 25 and 30 C. C R/W The differential is different if only one compressor or two or three compressors are working. Set point/differential compensation according to the outside temperature Silenced Set=28.0bar Non silenced Set= 17.0bar Silenced Diff= 8.0bar Non silenced diff= 12.0bar C R/W C R/W C R/W C R/W C R/W bar R/W bar R/W C R/W bar R/W bar R/W Enabling snow/ice formation prevention when the unit 0 1 R/W is Off Minimum outside temperature for activating the C R/W function Period between a speed up and the other min 0 99 R/W Period in which fans are sped up to the utmost s 0 99 R/W To overcome the inertial force, the fans speed is s 0 99 R/W forced to 50% over the speed-up time Minimum speed % R/W Maximum speed R/W % Pumps Display description Description Value description UOM Min Max R/W Number of pumps in the plant side R/W Before giving consent to the compressors, pumps must operate for this period After the plant is Off, pumps remain active for this period s R/W s R/W If a pump works for 8 consecutive hours, it is rotated on hours R/W the first occasion During rotation, pumps are turned off for this period s R/W However, if the pumps do not rotate within 7 days, rotation is forced days R/W Number of pumps in the recovery side R/W Allows to turn on/off the recovery pumps if there is no 0: On UNIT 0 1 R/W recovery heating capacity demand 1: SANITARY REQUEST Pag. 28/76 Pag. 28/76

29 Display description Description Value description UOM Min Max R/W Before giving consent to the compressors, pumps must s R/W operate for this period After the recovery is Off, pumps remain active for this period s R/W If a pump works for 8 consecutive hours, it is rotated on ore R/W the first occasion During rotation, pumps are turned off for this period s R/W However, if the pumps do not rotate within 7 days, rotation is forced Enabling plant/recovery pumps cyclical turn on if the outside temperature is below a limit. It helps avoid ice in the pipes. It also works with the machine Off giorni R/W Plant pumps 0 1 RW Recovery pumps Cycle length min RW Forcing length min RW Min.outside temp. C RW Counter Display description Description Value description UOM Min Max R/W Number of compressors operating hours, circuit 1 Values are stored in memory every 3 hours. h R Number of compressors operating hours, circuit 1 Values are stored in memory every 3 hours. h R Number of plant pumps operating hours h R Number of recovery pumps operating hours Please note: values are stored in memory every 3 hours. Number of fans operating hours. Values are stored in memory every 3 hours. h R Defrosts Hour, minutes and day of the week of the last two defrost cycles of both circuit 1 and 2 h min Day R Maintenance alarm threshold divided by: compressors pumps h R/W Compressors hours reset, circuit 1 0: No 1: Yes R/W Compressors hours reset, circuit 2 0: No 1: Yes R/W Pag. 29/76 Pag. 29/76

30 Display description Description Value description UOM Min Max R/W Pumps hours reset 0: No R/W 1: Yes Fans hours reset 0: No 1: Yes R/W Forcing Display description Description Value description UOM Min Max R/W Forces the defrosting start or end, circuit 1 0: No R/W 1: Yes Forces the defrosting start or end, circuit 2 Forces plant/recovery pumps turn-on Takes into account any alarm 0: No 1: Yes 0: No 1: Yes R/W R/W Forces antifreeze pumps turn-on Forces fan pumps turn-on. Takes into account any alarm Disables the compressors of circuit 2 0: No 1: Yes 0: No 1: Yes 0: No 1: Yes R/W R/W R/W Disables the compressors of circuit 2 0: No 1: Yes R/W Pag. 30/76 Pag. 30/76

31 Options Display description Description Value description UOM Min Max R/W Parameters for supervision Type of protocol used 0: CAREL, 1: MODBUS 0 2 R/W Communication speed 0: : 9600 R/W 1: : baud 0 4 2: 4800 Address in supervision Supervisor management 0: No 0 1 R/W Enables cooling/heating by supervisor: 1: Yes Enables power on / off by supervisor: 0: No 1: Yes 0 1 R/W If the return temperature is varying, wait before R/W turning on/off the compressors avoiding unnecessary pickups. Minimum temperature change C R/W Pickups delay time between a compressor and the other min R/W If there is a Force Off operation due to the R/W reaching of temperature limits, the "low load" function avoids future operations by increasing the adjustment setpoint Maximum offset to be added to the setpoint C 0, R/W Cold/hot plant calculated setpoint C 0, R/W Recovery calculated setpoint C 0, R/W Temperature must remain above the threshold for min R/W a minimum time The function must not last longer than the time limit min R/W If the temperature drops below this setpoint, the internal resistance of the exchangers is activated. Function active also when the unit is Off C R/W Differential C R/W Input B8 configuration 0: NOT PRESENT 0 3 R/W 1: POWER LIMITATION 2: VARIABLE SETPOINT 3: POWER DEMAND Type of input 0: 0 10V 1: 4 20mA 2: NTC 0 2 R/W Minimum C R/W Maximum C R/W Minimum % R/W Maximum % R/W R/W Pag. 31/76 Pag. 31/76

32 C.Impianto Display description Description Value description UOM Min Max R/W This software can handle machines with 2 R/W pipes + sanitary ware or with 4 pipes In 2-pipe mode, you need to decide whether to give priority to the recovery or to the plant during winter 0 1 R/W Number of circuits handled in the NRP 1 2 R/W Number of compressors per circuit 1 3 Circuits may be unbalanced (see section on compressors) % R/W Compressors may have different power within the same circuit (see section on compressors) % R/W Condensation can be single or separate and thus singularly handled in the two circuits 0 = single 1 = separate(two outputs 0-10V) 0 1 R/W To avoid too many changes in yes/no recovery hot/cold mode a minimum time of mode operation is necessary min 0 99 RW Probes activation 0 = NO 1 = YES 0 1 R/W Probes activation 0 = NO 1 = YES 0 1 R/W Probes activation 0 = NO 1 = YES 0 1 R/W Probes activation 0 = NO 1 = YES 0 1 R/W Digital inputs activation 0 = NO 1 = YES 0 1 R/W Pag. 32/76 Pag. 32/76

33 Display description Description Value description UOM Min Max R/W Digital inputs activation 0 = NO 0 1 R/W 1 = YES Digital inputs activation 0 = NO 1 = YES 0 1 R/W Selects on/off operation logic by digital contact 0 1 RW Selects on/off operation logic by digital contact 0 1 RW Miscellaneous Display description Description Value description UOM Min Max R/W Here you can customize your password RW Select whether to display values in degrees Celsius or in the Anglo-Saxon unit of measurement 0 1 RW Pag. 33/76 Pag. 33/76

34 In - out Support Display description Description Value description UOM Min Max R/W Suction and discharge pressure, circuit 1 bar R Temperature read by the probes C R Suction and discharge pressure, circuit 2 bar R Temperature read by the probes C R Temperature read by the probes C R Temperature read by the probes C R Temperature read by the probes C R Temperature read by the probes C R Digital inputs 0= Off 1= On 0 1 R Digital inputs 0= Off 1= On 0 1 R Digital inputs 0= Off 1= On 0 1 R Pag. 34/76 Pag. 34/76

35 Display description Description Value description UOM Min Max R/W Digital inputs Cmp= compressor Circ= circuit 0= Off 1= On 0 1 R Digital inputs Evap= plant 0= Off 1= On 0 1 R Digital inputs 0= Off 1= On 0 1 R Digital inputs 0= Off 1= On 0 1 R Digital inputs 0= Off 1= On 0 1 R Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R Pag. 35/76 Pag. 35/76

36 Display description Description Value description UOM Min Max R/W Digital outputs 0 = On 0 1 R 1= Off Digital outputs 0 = On 1= Off 0 1 R Digital outputs 0 = On 1= Off 0 1 R pco3 large analog outputs R Pag. 36/76 Pag. 36/76

37 3.12 Manufacturer Menu The manufacturer masks group is password protected and hidden. In fact, for accessing this group of masks you need to enter a unique password in the access mask of the Manufacturer section. Please note that the values displayed in the masks match the defualt ones The default password is 202, but you may change it in the manufacturer section If the password is wrong, you will receive an error message. The password displayed will be set to 0 after 5 minutes of inactivity of the user terminal. Once in the manufacturer section, you will be faced with a new menu with the following options. icon text description C.ALARMS Thresholds, alarm delays SYSTEM / COLD SIDE RECOVERY / HOT SIDE DEFROST PROBES CONF. COMPRESSORS MISCELLANEOUS DEFAULT SYSTEM parameters in the "2-pipe" machine COLD SIDE parameters in the "4 -pipe" machine Mask setpoint limits, differential, adjustment type, geothermal parameters, set point EEV RECOVERY parameters in the "2-pipe" machine HOT SIDE parameters in the "4-pipe" machine Mask setpoint limits, sanitary differential, adjustment type, sanitary resistance, anti-legionella. Parameters concerning defrosting Active probes limits and probes calibration Rotation type, safety times Modbus Factory defaults loading Alarm Conf. Display description Description Value description UOM Min Max R/W 0 R/W Before stopping the system, the software does this number of attempts for flow lack R/W s 0 R/W R/W C 0 R/W Pag. 37/76 Pag. 37/76

38 Display description Description Value description UOM Min Max R/W C 0 R/W C 0 R/W C 0 R/W With very harsh outside temperatures, hot water production is disabled C 0 R/W 0 R/W bar 0 R/W bar 0 R/W C 0 R/W bar 0 R/W Delays are also used for managing the low pressure switch bar 0 R/W 0 R/W 0 R/W Pag. 38/76 Pag. 38/76

39 CHILLER Conf. Display description Description Value description UOM Min Max R/W Recovery Conf. Display description Description Value description UOM Min Max R/W Defrost Display description Description Value description UOM Min Max R/W Enables defrost for decaying 0: No R/W 1: Yes Low pressure decay maximum limit bar R/W Defrost control start delay by power change min R/W Defrost control start delay by mode change min R/W Outside temperature minimum setpoint for defrost start C R/W min R/W Low suction minimum set point for defrost start bar R/W LP maximum limit beyond which defrost is disabled bar R/W Low suction minimum set point for defrost start bar R/W Defrost start delay by compressors start min R/W Defrost start pressing gas temperature C R/W Defrost start delay by Pressing gas temperature s R/W Defrost ended for having reached liquid C R/W temperature Minimum operating time s R/W Maximum operating time s R/W Pag. 39/76 Pag. 39/76

40 Display description Description Value description UOM Min Max R/W Minimum time that must elapse between the end of min R/W a defrost cycle and the beginning of another Waiting time between the defrost input and output cycle inversion Compressors start delay once the valves have rotated Fans are sped up to the utmost if the condensing pressure exceeds the setpoint s R/W s R/W bar R/W Speed-up return differential bar R/W You may select that both circuits come into defrost together or that they work separately 0: No 1: Yes R/W Probes Conf. Display description Description Value description UOM Min Max R/W R/W R/W R/W R/W Compressors Conf. Display description Description Value description UOM Min Max R/W Compressors and circuits rotation type 0. LIFO 1. FIFO 2. IN TIME R/W s R/W s R/W Pag. 40/76 Pag. 40/76

41 Display description Description Value description UOM Min Max R/W s R/W Miscellaneous Display description Description Value description UOM Min Max R/W Default Display description Description Value description UOM Min Max R/W Allows you to reset the default values 0. No RW 1. Yes Pag. 41/76 Pag. 41/76

42 4 Main Functions NRP machines have characteristics which enhance energy saving, such as: R410A coolant Generously sized exchangers Smart defrost Set point compensation with the outside temperature The main source of saving in the application of multi-purpose units is the possibility to recover the condensation or evaporation heat, in case of simultaneous opposite heat loads pipes + sanitary ware functioning diagrams Production of cold water only in the system Production of hot water only in the system Production of sanitary hot water only in the recovery exchanger Pag. 42/76 Pag. 42/76

43 Simultaneous production of cold water in the system and sanitary hot water in the recovery exchanger Simultaneous production (reduced power) of hot water in the system and sanitary hot water in the recovery exchanger pipes functioning diagrams Production of cold water only in the system Production of hot water only in the system Pag. 43/76 Pag. 43/76

44 Simultaneous production of cold and hot water in the plant (sanitary water can be viewed as a plant terminal) pipe + recovery machine There are 2 types of NRP. 2-pipe plus heat recovery machines and 4-pipe machines. 2-pipe machines can produce hot water and plant side cold water and can simultaneously produce recovery / sanitary side hot water. It is typically employed in hotels or apartment blocks. As is evident from the functioning diagrams, the machine is capable of: Cooling only, plant side Heating only, recovery side Heating only, plant side At the same time, plant side Cooling and sanitary side Heating At the same time, plant side heating (50%) and sanitary side heating (50%) (version 1.3) In 2-pipe machines, the valve to turn and the VIC (plant) is of course on the ventilated battery. The mode change is made according to the request of the two main thermostat controls. The change occurs when the compressors are Off if there is only one compressor per circuit and with only one turned-on compressor if there are multiple compressors per circuit. There is a minimum operating time of 5 minutes. This prevents too many changes of valve states. If the demands of the two thermostats is different, the highest demand overcomes while the other can only accept either 0% or 50% or 100% of the compressors power pipe machine 4-pipe machines can produce plant side cold water and can simultaneously produce hot side hot water. It is typically employed in buildings with large glass windows or buildings that need hot and cold water daily. As is evident from the functioning diagrams, the machine is capable of: Cooling only, cold side Heating only, hot side At the same time, plant side Cooling and sanitary side Heating In 4-pipe machines, the valve to turn and the VIR (recovery) is of course on the ventilated battery. The mode change is made according to the request of the two main thermostat controls. The change occurs when the compressors are Off if there is only one compressor per circuit and with only one turned-on compressor if there are multiple compressors per circuit. There is a minimum operating time of 5 minutes. This prevents too many changes of valve states. If the demands of the two thermostats is different, the highest demand overcomes while the other can only accept either 0% or 50% or 100% of the compressors power. Pag. 44/76 Pag. 44/76

45 4.4 Operating modes The NRP can produce both cold water and water, even simultaneously. It simultaneously manages two thermostats. The thermostat which will require more power will become a priority, while the other will decide the operating mode of the two circuits. Once selected a mode, it will remain so for at least 5 minutes. As long as there is no request for a mode change, the machine keeps its current mode. With no turned-on compressor, the rotation of the circuits will take place by default in time. But if there is a circuit with a turned-on compressor and there is a partial request for power, an excessive number of compressors pickups will preferably be avoided. In the mode change, the safety times of the compressors will be met in any case; which means that the mode change could be delayed to meet the minimum ignition time of the compressors Mode change conditions during summer operation. Circuit A = Chiller + Recovery Circuit B = Chiller + Recovery A B Circuit A = Chiller only Circuit B = Chiller only J I H Operating mode choice G F E C D Circuit A = Recovery only Circuit B = Recovery Circuit A = Chiller + Recovery Circuit B = Chiller only Circuit A = Chiller + Recovery Circuit B = Recovery only Input condition Output condition Step = percentage of power needed to turn on a compressor A The request steps of the plant and the recovery are identical B There is no longer plant request, or there is no longer recovery request, C There is recovery request, but no plant request D The request of the plant is higher than 50%, or there is no longer recovery request, or the request steps of the plant and the recovery are identical E The recovery request is higher than the plant request and the plant request exceeds 50% Or the recovery request steps are higher than the request steps required by the plant F There is no longer recovery request Or there is no longer plant request Or the plant and recovery request steps are identical Or the recovery request steps are less than the plant request steps G There is plant request and it is higher than the recovery request and the request for recovery exceeds 50% Or the plant request steps are higher than the steps required by the recovery. H There is no longer plant request Or there is no longer recovery request Or the plant and recovery request steps are identical Or the plant request steps are less than the recovery request steps I There is plant request, but no recovery request J The recovery request is higher than 50%, or there is no longer plant request, or the plant and recovery request steps are identical Pag. 45/76 Pag. 45/76

46 4.4.2 Mode change conditions during Winter operation In the 2-pipe plus sanitary ware machines, there is the possibility of doing both plant side heat and sanitary side heat. In this example it is assumed that the priority is set to the recovery. Circuit A = Heat pump Circuit B = Recovery A B Circuit A = only heat pump Circuit B = only heat pump Input condition F E Decision Mode of function C D Circuit A = Only recovery Circuit B = Onlyrecovery Output condition A The power required by the plant is greater than zero and the recovery power is less than 50%. B The recovery power is equal to zero or the recovery power is greater than 75%. C The recovery request is higher than 50% D The recovery request is less than 25% E The recovery power required is equal to zero and the plant power is greater than zero F There is no request by the plant or the recovery power requirement (which has priority) is greater than 25%. 4.5 Water regulation The NRP monitors the temperature of the water returning from the plant, or the outlet temperature (settable by parameter) operating with the compressors to produce hot water or cold water trying to get as close as possible to the desired set point. In the 2-pipe machines, the plant can produce hot water (heating), and produce cold water (cooling). In the 4-pipe machines the cold side can only produce cold water (cooling). All key parameters are accessible either in the main section or in the support section Proportional + Integral Control The software is able to implement a proportional plus integral control on the control either of the inlet or outlet temperature of the machine. For example, in input control summer mode, the software will use these parameters Cooling setpoint Cooling differential (KP) Integral (if at zero it is disabled) Neutral zone differential The required percentage for turning on the compressors will be the result of the proportional part Kp Ric Kp [% ] Set Diff T[ C] Plus the integrative part given by the following formula Ric kp Ric ki = RicKi _ old + Ki K fast Where Ric Kp = proportional power required Set = Cooling set point Diff= cooling differential T = inlet temperature Ric Ki = request for additional power Ric Ki_old = request for additional power of the instant before Ric Kp = request for proportional power Ki = parameter of the integral factor K fast = is a coefficient taking into account how much the temperature is distant from the set point As can be seen from the formula, the greater is the integrative factor, the slower is the integral action. Furthermore, the integral action near the setpoint is almost zero whereas when the proportional request is close to 1000, the integral action will be very decided. For example, if the percentage of proportional request remains fixed at 25% for a period equal to Ki, there would be an integrative request equal to 25% T[ C] Diff Set K fast=3 K fast=4 T[s] As can be seen from the graph shown here, if the temperature drops below the set point, the Kfast factor triples its action. Also, if the temperature drops below setpoint - means differential, the Kfast factor quadruples its action. Note: During defrosts or with selected quick timetables, the integral factor is frozen. In fact, it would accumulate without reason. Plus the the derivative part given by the following formula (NOT AVAILABLE FOR THIS VERSION) Ric Kd Kd = request for derivative power Rickd = RicKd _ old + ( Rickp _ old Rickp ) Ric Kd_old = derivative power request of the previous instant 100 Ric Kp = request for proportional power Ric Kp_old = request for proportional power Kd = parameter of the derivative factor Pag. 46/76 Pag. 46/76

47 As can be seen, the derivative part tends to give a response which is exactly the opposite to what the proportional part multiplied by the derivative factor would require. If the derivative factor is 100, we have the maximum action. The derivative action, if the proportional part does not change, tends to zero in a Kd seconds time. If the difference between the temperature and the setpoint used at that time is lower than or equal to the neutral zone differential, neither the integrative factor nor the proportional part are increased/decreased. This helps decrease the number of pickups of the compressors. Thus obtaining the final formula: The formula is updated every second Differential automatic calculation Richiesta = Ric + Ric + Ric Depending on the mode of operation, the outdoor air temperature and the hydraulic characteristics of the plant, the output of the machine changes over the year. With the automatic calculation of the differential, the software is able to respond better and faster to the user demands. The basic principle is that every time the machine runs at top speed, the software, according to the inlet and outlet temperature, calculates the thermal difference and sets it as differential. Operating mode Plant differential Recovery differential Chiller only Plant Outlet T. Plant inlet T. 5.0 C Recovery only 5.0 C Rec Outlet T. Rec inlet T. Chiller plus recovery Plant Outlet T. Plant inlet T. Rec Outlet T. Rec inlet T. Heat pump Plant Outlet T. Plant inlet T. 5.0 C Kp Clearly, after the two circuits have reached 100%, the software waits for a settable time (2 minutes by default) before assigning the new value to the automatic differential, settable in the support section Plant conf. However, in the main masks the differential used at that precise moment is always displayed Ki kd There will however be a minimum limit and a maximum limit within which the differential may vary Plant/recovery Pull-down management Bypass / VIC valves This feature avoids unnecessary ignitions of compressors checking the derivative on the inlet water temperature. As long as the return water temperature continues to fall (cold) or increases (hot) with a speed greater than or equal to ("Allowed temperature variation"), the software will not require other compressors but will wait for the power supplied to stabilize. And in any case, after each increase in the compressor ignition, it will wait for a time ("Comp.ign. delay") prior to further increase power. Cycle inversions occur as a result of a request change. If there is only one compressor per circuit, the whole circuit is turned off before reversing the cycle, otherwise only one compressor is kept turnedon. At each change of operating mode, the minimum compressor ignition timetables will be ignored. To preserve the proper functioning of the solenoid valves, the software tries to keep the cycle inversions to a minimum. In particular, mode changes are limited to maximum one every 5 minutes (changeable parameter in the support-> plant conf. section). After a shutdown by key, or by digital input, or by thermostat control, valves are not immediately de-energized but there is a 5- minute delay. This time avoids leakage noises and liquid passages. Below are the statuses of the various solenoid valves divided by machine type and mode. 4-pipe NRP VIR VS1 VS1A VS-R VS-B VS-E VBR Chiller Off On Off On Off Off Off Chiller + Recovery On On Off Off On Off Off Recovery On Off On Off Off On Off Defrost Off Off Off Off Off Off On 2-pipe NRL + SANITARY VIC VIR VS1 VS1A VS-R VS-B VS-E V-By Chiller Off Off On Off On Off Off Off Chiller + Recovery Off On On Off Off On Off Off Heat Pump On Off Off On On Off Off Off Recovery Off On Off On Off Off On Off Defrost OFF OFF ON OFF ON OFF OFF ON Pag. 47/76 Pag. 47/76

48 4.5.5 Gas circuit alarms The NRP manages all safety devices necessary to preserve the machine from breaking. If an alarm disables a compressor, it is removed immediately from the compressor rotation and an informative icon will be displayed on the main mask. The alarms of the compressors, namely: The heat of each (without delay and with manual reset). The high pressure by high pressure switch The low pressure by low pressure switch The high pressure threshold by high probe The low pressure threshold by low probe The high temperature threshold by compressor supply Alarm Cause Delay Reset Action Compressor thermal overload Dig. Input No Manual Comp. shutdown High pressure by pressure switch Dig. Input 1 and 9 No Manual Circuit shutdown High pressure by HP probe Pressure B1 and B6 YES Manual Circuit shutdown Low pressure by LP probe Pressure B2 and B7 YES Automatic / Manual Circuit shutdown Low pressure by LP (Gas lack) Pressure B2 and B7 YES Manual Circuit shutdown High Temperature by Compressor supply Temperature B5 and B10 YES Automatic Circuit shutdown There are two low-pressure alarms by probe, the first is lighter and with semi-automatic reset (in this case, three consecutive attempts are made before switching to manual mode); the other is with manual reset. NOTE: All the parameters regarding safety devices can be found under the section "Alarm Conf." in the manufacturer section Water side alarms The NRP can handle up to 4 pumps: two plant side/cold side pumps and other two used for the recovery/heat side. The safety devices associated with these pumps are Pumps thermal overload Recovery/heat side flow switch Plant/cold side flow switch Recovery/heat side antifreeze thresholds Plant/cold side antifreeze thresholds Plant/cold side Off Force Recovery/heat side Off Force Alarm Cause Delay Reset Action Pumps thermal overload Dig. Input 13,14 No Manual Pump shutdown and reserve pump ignition after 10s Recovery/heat side flow switch Dig. Input Part.+ speed Automatic manual Recovery pump shutdown Plant side flow switch Dig. Input 5 Part.+ speed Automatic manual Plant pump shutdown Recovery/heat side antifreeze temperature No heat, cold OK Settable Comp. shutdown Plant/cold side antifreeze temperature B3 No cold, heat OK Settable Comp. shutdown For managing the flow alarm, on the plant you can select both the Manual mode and the automatic reset; in the latter case, 3 consecutive attempts are made, after which Manual reset is activated. NOTE 1: in case of reversible plant with water side reversing and reversing valve external pump, the geothermic flow switch will become plant flowswitch and vice versa. NOTE: All the parameters regarding safety devices can be found under the section "Alarm Conf." in the manufacturer section Water side prevention In order to avoid the formation of ice in the exchangers, the software implements a range of preventions on the water outlet temperature. Default Param. Rec. Pump Plant Pump Circuit Alarm Mask Icona Notes Recovery mode change force 57,5 C Ma42 heat mode Off Ignore mode change time Recovery water antifreeze alarm +3,0 C Ma12 Force ON Force Off AL42, AL43, AL44 Working when Off as well Plant heat mode change force 57,5 C Ma42 heat mode Off Plant cold mode change force +5,0 C Ma42 cold mode Off Ignore mode change time Plant water antifreeze alarm +3,0 C Ma9 Force ON Force Off AL40, AL41 Working when Off as well Pag. 48/76 Pag. 48/76

49 4.6 Machine operating limits In the following masks you can see the operating limits Cold operation Hot operation Total recovery operation Pag. 49/76 Pag. 49/76

50 4.7 Compressor management The request for hot water/cold water is split in the two circuits and in turn in the compressors relating to that circuit. As you can see in the following graph, the number of turned-on compressors depends both on the regulation differential and on the previous state of the request. This hysteresis mechanism prevents the excessive power on and off of the compressors, giving stability to the system. ON Comp1 ON Comp2 Comp1 Rich[ C] 100% Caldo Freddo OFF Set Dif Rich.[%] OFF 0% 100% 0% 50% 100% Circuit rotation management Set Dif f Rich.[%] According to the plant and recovery thermostatic request, the software distributes power on both circuits. To select the most suitable compressor to turn on, the software applies different rules: 1. tries to evenly distribute loads between the two circuits 2. performs a rotation of the compressors to equalize the number of pickups and operating hours 3. tries where possible to operate the chiller + recovery circuit so as to recover energy 0% Dif Setpoin Dif Temp[ C] Rotation is not carried out based on the power of the circuits. In other words, in the selection of the circuit most suitable for being turned on / off, the power of the individual circuit is not counted Power distribution The software, for the best performance, will attempt to first turn on a compressor on one circuit and then on another, so as to make the most of the powers Compressor rotation management The software manages the distribution of the number of ignitions/shutdowns of the compressors within the same circuit. The software manages up to 3 compressors per circuit and 2 circuits Type of compressor rotation The types of rotation are: FIFO (First in first out): the first turned-on device will also be the first to shut down; LIFO (Last in first out): the last turned-on device will be the first to shut down; In time: the request for the ignition/shutdown of the devices is based on the hours of operation of the devices. In particular, the compressor which has the least number of operating hours is chosen for the ignition, while the compressor with the largest number of operating hours will be chosen for the shutdown. The operating hours are calculated internally. If two or more compressors have the same number of hours, a FIFO rotation will be performed among those concerned Timeschedule-operated compressors Regardless of the type of rotation, if a compressor is On for a minimum timeframe it won't be required to be turned off. Same thing in the ignition phase. If a compressor is Off for a minimum timeframe it won't be required to be turned on Alarm Management As soon as a compressor goes into alarm, it is turned off immediately without waiting for any timetable. Also, to compensate for the power loss, another device among those available will be immediately turned on. Once the alarm turns off, the compressor will be available again and if there is a request it will be turned on Power allocation In order to run, the software needs for the powers of the individual compressors to be properly set as a percentage. If you leave the parameters in Support / plant conf. at zero, the software automatically assigns the same value of 100 divided by the number of compressors set. The software, once chosen the compressor based on the type of rotation, will start to increase its power up to 100% of the first compressor. Then, it will switch to the next compressor. Same goes for the shutdown phase. For example: Set circuits: 3; Parameter H12 : Compressor1: 60% Parameter H12 : Compressor1: 20% Parameter H12 : Compressor1: 20% Rotation FIFO Thermoregulation request 70% Compressor 1 will be On while the other 2 will be Off. If at this point compressor 1 goes into alarm, the other two will turn on as a replacement and a 10% request will be unmet. 100% Comp1 Comp2 Comp3 RecPower 60% 80% 100% Note: The software chooses the circuits to be increased/decreased only according to the availability and the type of rotation selected. For example, it would never shut down a "big" compressor to turn on two small ones just because as to the sum of powers it is closer to the desired power. Pag. 50/76 Pag. 50/76

51 4.7.3 Compressor timetables The NRP can handle up to three compressors on two separate cooling circuits. With joint or separate ventilation. Compressors, according to the size of the machine, can be each of different size. The management of the compressors meets the common safety times. These are: Minimum ignition time. Once started, the compressor must remain turned on for at least the minimum ignition R time. Serves to ensure oil return. T[s] Cmp TMinOn T[s] R Cmp TMinOn T Compressor request Compressor ON Minimum Time Time Minimum shutdown time R Once stopped, the compressor must remain Off for at least the minimum shutdown time. Serves to ensure the cooling of the windings. T[s] R Compressor request Cmp Cmp Compressor TMinOff OFF Minimum Time T[s] T Time TMinOff Minimum time between two starts of different compressors Start delay between two starts of two different compressors. R When starting, a compressor consumes a great amount of current. If 2 compressors started at the same time, you would risk an overload. Cmp1 Cmp2 T[s] T[s] R Compressor requests Cmp1 Compressor 1 Cmp2 Compressor 2 TDiffSw Minimum time between two starts of different compressors T Time TDiffSw T[s] Minimum time between 2 starts of the same compressor It is the minimum time that must elapse between two consecutive ignitions of the same R compressor. It serves to limit the number of starts per hour. If for example the maximum number of starts per hour is 10, it means that the value to be set is 360 seconds. T[s] R Compressor requests Cmp Cmp Compressor TSameSw Minimum Time between 2 starts of the same compressor T Time T[s] TSameSw All the parameters concerning the compressor timetables are under the section "Compressor" in the manufacturer section Pag. 51/76 Pag. 51/76

52 4.7.4 Compressor powers chart Values are expressed as a percentage Legenda: series SH=Maneurope series ZP=Copeland Size NRP Comp.1 Circ.1 Comp.2 Circ.1 Comp.3 Circ.1 Comp.1 Circ.2 Comp.2 Circ.2 Comp.3 Circ.2 Comp.models Circ.1 Comp.models Circ.2 Cooling Power % % % % % % KW % 50% SH090/ZP91 SH090/ZP % 43% SH120/ZP120 SH090/ZP % 50% SH120/ZP120 SH120/ZP % 43% SH161/ZP154 SH120/ZP % 50% SH161/ZP154 SH 161/ZP % 50% SH184ZP182 SH184ZP % 28% 44% 2x SH 120/ZP120 SH 184/ZP % 26% 40% SH161/ZP154 + SH 184/ZP SH120/ZP % 21% 29% 21% SH161/ZP154 + SH161/ZP SH120/ZP120 SH120/ZP % 25% 25% 25% 2xSH161/ZP154 2xSH161/ZP % 25% 25% 25% 2xSH184/ZP182 2xSH184/ZP % 21% 29% 29% 2xSH184/ZP182 2xSH240/ZP % 25% 25% 25% 2xSH240/ZP235 2xSH240/ZP % 22% 28% 28% 2xSH240/ZP235 2xSH300/ZP % 25% 25% 25% 2xSH300/ZP295 2xSH300/ZP % 25% 25% 25% 2xSH380ZP385 2xSH380/ZP % 23% 18% 18% 18% 2xSH380ZP385 3xSH300/ZP % 17% 17% 17% 16% 3xSH300/ZP295 3xSH300/ZP % 15% 22.5% 15% 19% 18% 18% 3xSH300/ZP295 3xSH380/ZP % 22.5% 17% 17% 16% 3xSH380ZP385 3xSH380/ZP Chiller climate curve To save energy you can activate a current setpoint compensation function according to the outside air temperature. In cooling mode: The higher the outside temperature the lower the control set point In heating mode: The lower the outside temperature the higher the control set point 4.8 Pump management The NRP can manage up to 4 pumps: two plant/ cold side pumps, and other two used for the recovery/heat side. Pumps, besides bringing water to the plant and the recovery, allow to always properly read the input and output probes of the exchangers. This is why they will always be active when you want to adjust that exchanger. The only exception is when you have a probe in the storage tank. In this case, as the reading of the probe is always correct, you may decide to turn off the pumps as well, in the event that there is no compressors request. The software manages the second pump of the exchanger, that will always be a reserve of the first pump. Therefore, there will never be a moment where the two pumps operate simultaneously. The rotation of the pumps occurs whenever there is an ignition of the plant/recovery. So it is a starting rotation. Every 8 hours of work by the pumps (P9/P18 parameter) a rotation will be required. It will take place as soon as no compressor is active. First the pump will turn off, there will be a waiting time and then the pump that was in reserve will restart. But if the plant has always active compressors (eg: industrial chiller), the software will however force a rotation of the pumps every 7 days (P9/P18 parameter). After the start of the pumps, the software will wait a few moments (settable parameter) before giving the compressors consent to start. This time allows the water to flow through the plant/sanitary ware and therefore it also allows the probes to give a correct reading of the temperature values Pipes antifreeze With the input and output probes of the exchangers, the card ensures all the anti-freeze functions of the machine. If you want to protect also the plant downstream of the NRP, this function cyclically activates both plant-side and recovery-side pumps, even when the machine is Off. This function is disabled if the outside temperature is above a certain threshold. You can use this function also as a "Kick Off" pump or a descaler. It is similar to the parameter Frost protection set_installer(7) = 4 of the Modu-Control Pag. 52/76 Pag. 52/76

53 4.9 Fan management The NRP multi-purpose machines can produce hot/cold water either separately or simultaneously. Fans are monitored with two 0-10V outputs, one for each circuit if the fans are separated. The ventilating battery, depending on the configuration, assumes different functions: Circuit mode Fan functioning Regul. type Contr. probe Set Diff. Mask 1 Chiller Condensation Prop High press bar 20.bar V12 2 Heat pump Evaporation Prop Low press bar 5.0 bar/ 10.0 bar V9 3 Recovery only Evaporation Prop Low press bar 5.0 bar/ 10.0 bar V9 4 Chiller + recovery Off Defrost Condensation On/Off High press bar 2.0 bar N24 Evaporazione In the evaporation mode, fans are sped up to the utmost if the outside temperature is less than the parameter set. There are two thresholds depending on the outdoor temperature. This feature allows to reduce noise annoyance if the outdoor temperature exceeds a certain threshold. In the evaporation mode, fans will have a different regulation differential depending on how many compressors are active in that circuit Fan proportional control [Volt] Max Min Set Diff HP[bar] Fan climate curve In the condenser mode fans are controlled with a 0-10 Volts output. When the pressure will be lower than the set, the analog output will be 0 volts; When the pressure rises above the set point + differential, the analog output will be 10 volts; A minimum output voltage occurs before the shutdown. However, fans reach 5 volts for 2 seconds (settable) during pickup and then begin to adjust according to the set. In chiller mode, to save energy you can activate a current setpoint compensation function according to the ambient air temperature MaxSet MinSet MaxT MinT Text Joint or separate ventilation As you can see in the picture, the software creates a line with the parameters configured in the mask. Note that you may be able to change both the setpoint and the condensation. NRP machines with the NRP800 size have joint ventilation, this means that the fans run for both circuit 1 and circuit 2. In case of machines with a single ventilation group, fans will always follow the highest condensation in condensation mode. Whereas they will follow the lowest pressure in evaporation mode. Furthermore, if both circuits come into defrost, the first to reach the output condition waits for the output of the other circuit at the beginning Fan antifreeze management To avoid the formation of ice/snow in the fans during winter, in turned-off machines you can activate the Fan anti-freeze function. It activates the fans and cyclically if the outside temperature (measured by the probe TAE) is below the set value. Pag. 53/76 Pag. 53/76

54 4.10 Defrost The NRP machine can easily produce hot water with very cold outdoor temperatures. To prevent the formation of ice in the ventilating batteries, the software implements the function called defrost. However, the circuit for starting the defrost cycle must: If the outside air temperature is above 10 degrees centigrade it is assumed that there is not the possibility of ice formation in the batteries. If the low-suction pressure is higher than 5.5 bars (that is -6.6 C) it is needless to perform defrosting Minimum conditions necessary to begin defrost Default Mask 1 Ambient air temperature below a certain threshold 10 C N6 2 Suction pressure lower than a certain threshold 5.5 bar N9 3 Circuit with at least one compressor On Circuit which is producing heat (either on the plant side or the recovery) The circuit is not in full recovery The plant exchanger (2-pipe machine), or the heat-side exchanger (4-pipe machine ) is available Defrost start Defrost can be triggered for 4 reasons: Default Ritardo Maschera 1 Decay 0,6bar 2 min N3 2 Safety low pressure minimum threshold 3.5bar 2 min N9 3 Defrost start after a power failure 4.8bar 2 min N12 4 Pressing gas temperature C 60s N15 5 Defrost start for the request of the other defrosting circuit N Defrost for decay As ice forms on the external batteries, the battery decreases its performance, and manages to exchange less heat with the outside. Consequently, the suction pressure tends to precipitate. This principle is employed for the decay function. Indeed, if the suction pressure, since when the machine had a clean battery and it worked at top performance, falls below a certain pressure delta, defrosting is triggered. The software decides that the machine works at top speed when: Default Mask 1 The circuit has worked at that power for a minimum time 2 min N3 2 The circuit has worked in that mode for a minimum time 1 min N3 3 A minimum time has elapsed from the end of the previous defrost 20min N21 However, the pressure value "battery clean" can not be higher in value than the defrost start maximum pressure. If the outdoor air temperature rises above the defrost activation threshold, the delta is set to zero because it is assumed that the ice has melted. Also, the decay accumulates. It means that if the machine accumulates for example a decay of 0.3 bars and then turns on a compressor in that circuit. That value of 0.3 bars is saved and will then be counted after the times mentioned above. The decay value is reset every time a defrost cycle is performed and every time you cut the power to the machine. If the decay value equals or exceeds the set value (0.6 bars by default), defrost can start. However, there is a safety threshold such that defrosting begins anyway (3.5bars by default) Defrost start due to a blackout If the machine restarts after a power failure, the software can not know how long the blackout lasted and what happened at that time. So the software does not know if the fan batteries are already frosted. Therefore, it will perform a safety defrosting procedure with suction/pressure values higher than the normal parameters Defrost During the actual defrost phase, compressors are all forced On without observing the safety times. The low pressure alarm is disabled. The fan battery is in condensation mode. If the condensing pressure exceeds the safety threshold, fans are sped up to the utmost. This action also has the benefit of removing droplets from the battery. Pag. 54/76 Pag. 54/76

55 Defrost end Once defrosting has started, it can end only for the following conditions Default Mask 1 If the fluid temperature exceeds a certain threshold 30.0 C N18 2 Maximum duration of defrost time 6 min N18 If an alarm goes off stopping defrost, once the alarm is Off defrosting is forced to repeat its cycle Joint or separate ventilation. The NRP machines with the NRP800 size have a joint ventilation. In the case of machines with a single ventilation unit, a circuit undergoing defrosting forces the other to defrost as well. Also, if both circuits come into defrost, the first to reach the output condition, waits for the output of the other circuit at the beginning of phase E except that the compressor, the fans and the VSL remain Off during the wait Defrost Cycle The defrost cycle is divided into the following phases: Sbrinam. Forza compr. Forza 1 comp. Forza al massimo i compressori VIC / VIR 10 s. 45 s. 10 s. 45 s. Vent. 100% VS1 VS1A VS-by / VBR In 2-pipe + sanitary ware machines, the valve turning is the VIC. In 4-pipe machines, the valve that turns the cycle is the VIR. Note: In circuits with a single compressor, the compressor is shut down when the reverse cycle valves are turned. While in circuits with multiple compressors just one compressor is forced On Fan management during defrost Fans remain Off during the defrost cycle to facilitate the increase of temperature in the battery. However, if the condensing pressure rises too high, they will then be sped up to the utmost to avoid false alarms of high pressure Defrost Not available In 2-pipe machines, defrosting is done in the plant side. While in the 4-pipe one, it is performed in the recovery side. If for some reason it is not possible to perform defrosting, an alarm occurs (AL078, AL079) and the circuit concerned turns off. To restore the circuit it is necessary: to eliminate the source of the alarm (flow switches, pump thermal overloads...) that at least the maximum defrost duration time has elapsed or the software requires that the circuit goes either into chiller or water / water mode only (chiller + recovery) Pag. 55/76 Pag. 55/76

56 4.11 Dynamic Force Off (Hot) If the outside temperature is very cold, the NRP may have a very poor performance in the production of very hot water or even go into crisis. To avoid this malfunctioning the software attempts to produce water at a lower temperature, not stopping its production. TOut As can be seen from the graph on the side, if the compressors work outside the operating limit they are stopped observing the timetables. Once the temperature falls, they are reactivated. MaxL Acronym Description Default Off Text outdoor air temperature MinL MaxT plant/recovery heat request limitation start C MinT plant/recovery heat request maximum limitation C TOut plant/recovery outlet water temperature MinT MaxT Text MinL Minimum allowable temperature 43.0 C MaxL Maximum allowable temperature 58.0 C The main mask displays a symbol indicating the dynamic force off 4.12 Prevent In order to prevent serious alarms, the software is able to limit the required power to the circuit. The prevention alarm measures limit the power of the cooling circuit ensuring continuity of service. The NRP limits power in case of prevention of: High pressure Low pressure Antifreeze battery outlet water Let's take the high pressure probe as an example. As you can see in the following graph, if the pressure is higher than the Set threshold, the software reduces power by 50%. If the pressure continues to increase, the software will reduce the circuit power more and more, up to the highpressure alarm threshold without even one turned-on compressor. If the pressure drops below (Set - Diff), the demand for power limitation will be disabled. Demd Demd: power reduction request HP: probe checked 100% HP_Alarm: probe alarm threshold, removes all power Set: power decrease starting setpoint 50%h Diff: hysteresis. The function continues to operate up to Set-diff before turning off Diff Set HP_Alarm HP The prevention management of low-pressure circuit and evaporator outlet water antifreeze will be mirrored. The Prevent is not an alarm, but a malfunctioning of the machine Frost protection In order to prevent the formation of ice within the exchangers and their breaking, the software implements a series of preventions. If a water temperature drops below the threshold, this relay is activated unless the following alarms are triggered: phase controller upc card off-line flow switches alarms The protection turns on even when the machine is Off and forces the pumps to turn on. PS: The antifreeze protection is currently shared by all the exchangers High inlet temperature alarm If there is a supplementary source within the water circuit, it may happen that very hot water gets into the exchangers. If the temperature is too high, it may rise the gas pressure up to triggering the safety pressure switches. To avoid this design fault a high temperature alarm is generated. If the temperature exceeds 65, an alarm is triggered and the pump shuts down for 15 minutes. After this time, the pump turns back on and the temperature is rechecked up to a maximum number of 3 attempts in one hour. Once the number of attempts is over (the count of the alerts is decreased by 1 each hour), the alarm gets into manual reset. Pag. 56/76 Pag. 56/76

57 4.15 Flowswitch The lack of water circulation inside the exchangers can cause serious damage both as high pressure and as low pressure/water freezing. As standard, water flow switches are mounted on the two NRP exchangers. The status of the flow switch with turned-off pumps is open while during the normal operation of the pumps it is closed. To avoid problems related to possible bubbles inside the water circuit, alarm delays are set. Once the flow-switch alarm goes off, all pumps and compressors concerned are turned off. After 120 seconds a pump ignition is reattempted. If the alarm goes off again, the pump turns off and there is another 120-second wait. This procedure is repeated 3 times by default. At the third attempt (settable), the flow-switch alarm gets into manual reset. Digital Input Flowswitch Time[s] Pump Flowswitch Alarme Steady Del. Start del. 120s Start del. 120s 120s Start del. Time[s] Time[s] Pag. 57/76 Pag. 57/76

58 4.16 Low-load control The low-load control tries to prevent the stopping of compressors for Force Off alarm The control is divided between plant hot water, plant cold water and sanitary water production control. Every time the NRP starts with turned-off compressors, it will calculate the following parameters: Performance time Represents the time required by the NRP to vary the inlet temperature by 0.2 C Comp ignition time Ignition period of the compressor (Comp.Ign.Time), ON minimum time MC6 parameter. It is the minimum ignition time of the compressor. It serves to assure oil return DT Real Represents the variation of the inlet temperature between the start and the present time (DT Real) DT instantaneous Represents the temperature difference between the inlet and outlet temperature Setpoint Operating point of the plant or recovery SIW Inlet water probe SUW Outlet water probe, if there are multiple outlet probes, the lowest one is adopted in chiller mode, while the highest one in HP mode a) SIW theoretical performance, SUW with low load at startup (in chiller mode) Temp [ C] Compr On SIW Compr Off Srart Threshold [ C] SUW DT real instantaneous DT Force Limit OFF [ C] Time efficiency Time[s] Compr. Startup Time Minimum ON MC6 Time b) SIW theoretical performance, SUW with low flow rate at startup (in chiller mode) Temp [ C] Compr On SIW Compr Off Srart Threshold [ C] SUW instantaneous DT DT real =0 C Tempo resa=0s Force Limit OFF [ C] Compr. Startup Time Time[s] Minimum ON MC6 Time c) SIW Theoretical performance, SUW with proper flow rate and average load at startup (in chiller mode) Temp [ C] Compr On SIW Srart Threshold [ C] DT real SUW instantaneous DT Force Limit OFF [ C] Time efficiency Time[s] Minimum ON MC6 Time Compr. Startup Time Pag. 58/76 Pag. 58/76

59 The NRP, according to the three cases represented in the graphs above, will calculate a low-load threshold. It will be used to enable the startup of the first compressor to be used in regulating outlet water to ensure that a "low-load limit" compressor starts up. The table below summarizes the various cases Cooling case MC6 MC6 parameter. It is the minimum ignition time of the compressor. It serves to assure oil return T[s] Compressor ignition time from startup SIW Instantaneous value of the outlet water probe SUW Outlet water probe, if there are multiple outlet probes, the lowest one is adopted in chiller mode, while the highest one in HP mode SIW (t0) Value of the inlet water probe at compressor startup SUW (t0) Value of the outlet water probe at compressor startup SIW(tForceOff) Value of the inlet water probe upon reaching the Force Off threshold SUW(tForceOff) Value of the outlet water probe upon reaching the Force Off threshold Condition DT Real DT Instantaneous Cold low-load limit Startup from 0 0 Force Off cold + 2,0 C blackout A) Low load (SUW (t0) SUW(tForceOff)) / ( T[s]) * (MC6 T[s]) + ( SIW (t0) SIW) SIW SUW(tForceOff) a freddo Force Off cold + DT Instantaneous + DT Real B) Low flow 0,ie when cooled water goes back, the machine is already under frost protection SIW SUW(tForceOff) a freddo Force Off cold + DT Instantaneous x 1.5 C) Normal state SIW (t0) Inlet time after the minimum ignition time of the compressor SIW Outlet time when the minimum ignition time of the compressor is over Force Off cold + DT Instantaneous + DT Real Caso Riscaldamento Condition DT Real DT Instantaneous Heat low-load limit Startup from 0 0 Force Off heat 2,0 C blackout A) Low load (SUW(tForceOff) SUW (t0) ) / ( T[s]) * (MC6 T[s]) + (SIW SIW (t0)) Hot SUW(tForceOff) SIW Force Off heat DT Instantaneous DT Real B) Low flow 0,ie when heated water goes back, the machine is already under high temperature protection Hot SUW(tForceOff) SIW Force Off heat DT Instantaneous x 1.5 C) Normal state Inlet time after the minimum ignition time of the compressor SIW (t0) Outlet time when the minimum ignition time of the compressor is over SIW Force Off heat DT Instantaneous DT Real The low-load control will be disabled in the presence of defrosting or "fast timing" Pag. 59/76 Pag. 59/76

60 4 History PVT A portion of the memory of the pco is reserved for archiving of values important for research and troubleshooting of NRPunits. In particular, the pco every 5 seconds stores the values of the parameters reported in the following table. If an alarm is triggered the historicization locks and remains locked until the manual reset by the user. The machine does not store if is in off. There are two methods for the consultation of this archive: - By pressing both the keys "Alarm" and "Enter" and then selecting the menu "LOG DATA" - Downloading files to your PC using the key "SMART Key" or the PC program "Easy Winload32" Tabella valori memorizzati ogni 5 secondi per un totale di 13 ore di log Ind. Posizione fisica Descrizione 1 NO1 Compressor1 circuit 1 (CC1) 2 NO2 Compressor2 circuit 1 (CC1A) 3 NO3 Compressor1 circuit 2 (CC2) 4 NO4 Compressor2 circuit 2 (CC2A) 5 NO7 Evaporator Pump 1 6 NO8 Alarm 7 NO9 Evaporator Pump 2 8 NO10 Condenser fan1 9 NO11 Condenser fan2 10 NO12 Inversion cycle user side 1(VIC1 ) 11 NO13 Inversion cycle recovery 1(VIR1) 12 NO14 Inversion cycle user side 2(VIC2 ) 13 NO15 Inversion cycle recovery 2(VIR2) 14 NO16 Antifreeze heater 15 Y3 (0-10V) Modulation fan circuit 1 16 Y4 (0-10V) Modulation fan circuit 2 17 B1 High pressure circuit 1 18 B2 Low pressure circuit 1 19 B3 Outlet water temp. evaporator 20 B4 Inlet water temp. evaporator 21 B5 Discharge gas temp.circuit1 22 B6 High pressure circuit 2 23 B7 Low pressure circuit 2 24 B8 Inlet multifunction 25 B9 External air Temperature 26 B10 Discharge gas temp. Circuit2 27 upc - NO1 Recovery pump 1 28 upc - NO2 Recovery pump 2 29 upc - NO3 Compressor 3 circuit1 (CC1B) 30 upc - NO4 Compressor 3 circuit 2 (CC2B) 31 upc - B1 Inlet water recovery 32 upc - B2 Outlet water recovery 1 33 upc - B3 Common outlet water temp. evaporator (Master/Slave) 34 upc - B4 Common outlet water temp. recovery (Master/Slave) 35 upc - B5 Water tank DHW temp. (optional) 36 upc - B6 Outlet water temp. recovery 2 37 upc - B7 Liquid Temperature (end defrost) Circuit 1 38 upc - B10 Liquid Temperature (end defrost) Circuit 2 39 Status circuit 1 40 Status circuit 2 41 Request cooling side (user) 42 Request heating side (DHW) Pag. 60/76 Pag. 60/76

61 5 Testing and parameterization 5.1 Upload card pco and µpc with smartkey The key contains in addition to the software and bios / boot, all parameters at the default values. 1) Switch OFF the power supply from the card (MTA off) 2) The pco and the µpc requires different software, so pay attention to the software loaded into SmartKey. Connect the smartkey for the pco in the plug J10 and in the µpc smartkey software in the plug J7 3) remove the cable between pco [Field Bus] and µpc [J10] pco 4) Switch ON the power supply,in the smartkey briefly light up all the symbols and the buzzer beeps. From this moment you must wait approximately 30 seconds before the key is operational. This waiting phase is indicated by a flashing symbol µpc 5) After the controller enters programming mode and the start button lights steadily. 6) Se i led accesi fissi sono : Start + premere il tasto Start e avviare la procedura di scrittura del software nel µpc 7) If the leds on permanently are: Start + press the Mode button for 2 seconds, wait the change in Start +, then press Start 8) The procedure takes about 3/5 minutes where the Leds flash more and more quickly. 9) You recognized the end of the procedure by a long beep 10) Switch off the cards µpc and pco 11) Restore the original connections in the pco and µpc, re-connect the display pgd1 12) Re-connect pco [Field Bus] to µpc [connection J10] 13) Switch on and wait about 30 seconds before to see the first mask NRP. Select the language 14) Press ESC and then PROG : with UP e DOWN buttons find Manifacturer then press PROG 15) Compare this mask: Insert password 0009 and then press ENTER 16) Press ENTER in the mask menu Collaudo 17) Insert the commercial code of the NRP, and confirm with yes The display flash for 3 seconds NB: will be stored the date and hour of the test ATTENTION!!! 18) Switch OFF the pco and then switch ON 19) Attention for sizes 1404, 1504, 1655 see paragraph New compressors sizes Pag. 61/76 Pag. 61/76

62 5.2 Testing Procedure Go to menu debug Press PROG button and then insert the password Password is 0009 PS The password shown will be to 0 after 5 minutes of inactivity of the user terminal Menu test The commercial code must be the same as written in the label of the NRP unit Pay attention!!! 2 line: Fast time forced as : Minimum time ON = 10s Minimum time OFF = 10s Time between different starts = 10s Time between start pump and compressor = 5s NB If you swtch off the times return to default values 4 line: On/Off system and selection summer/winter. 1 line: water set point cooling side (without limits). Parameter S6 2 line: water set point heating side (without limits). Parameter S6 3 line: On/Off recovery 4 riga: set point recovery 2 line: Antifreeze setoint geothermal side. Parameter A3 3 line: Antifreeze setpoint user side. If version Y set to -10 C. Parameter A6 6 line: Low pressure setpoint. Parameter A21 7 line: High pressure setpoint. Parameter A18 N:B : If with automatic pressostat 42 bar set high pressure setpoint to 40, 5 bar (instead of 39bar) 2 line: Disable defrost 4 line: force defrost circuit 1 7 line: force defrost circuit 2 Delete history alarm. NB: Do it after finished test Force compressors circuit 1 Force compressors circuit 2 Force Pag. 62/76 Pag. 62/76

63 5.3 Termination procedure If the unit is standard the test parameters did not change under the Assistance menu, the easiest thing to do is: Password 0009 PS The password shown will be to 0 after 5 minutes of inactivity of the user terminal Menu collaudo Press Up and erase history alarms. This operation erase also the hours counter. Re- insert the commercial code and confirm. WILL BE RE-INSERTED THE DEFAULT VALUES OF: SET POINT NOT to do in sizes 1404, 1504, 1655 ANTIFREEZE LIMITS RESET HOURS COUNTERS Number of compressors, percentage capacity compressors Number pumps If during the test you have changed many parameters, located in many different menu, we recommend a full installation parameters. Press PROG button and enter in manifacturer menu: Installation Default Once finished test NRP press Prog Find MANIFACTURER and press Enter insert password 375 Find out Default and press Enter Install default values and then follow the procedure.. NOT TO DO IN SIZES 1404, 1504, 1655 NOTE: Switch off the NRP, insert again password 9 and insert again the commercial code of the unit. Pag. 63/76 Pag. 63/76

64 5.4 Appendix A. Main mask Main mask give informations with graphic icons. Following the description and the meaning of the warning. Meaning of the led: led alarm: on when at least one alarm Led mode: on in winter mode. Icons 1 line 2 line Meaning DATA ORA: giorno della settimana, Outlet Temp.user side and inlet recovery exchanger Inlet Temp. and Outlet Temp.evaporator in summer and of the condenser in winter. Inlet Temp.and Outlet Temp.recovery exchanger Percentage request user side or recovery. Give a rough indication of the request On when the pump is active in the plant or in the recovery. The number indicates wich pump is on Antifreeze heater active Indicates that the antifreeze prevent (low temp)in outlet is active. Stops the compressors. Indicates that the prevent high Temp.in outlet is active. Stops the compressors. Indicates flow switch contact open, in this case compressors off and pumps starts and try to unlock the flowswitch. 8 riga Compressors status circuit1 C1 or circuit2 C2 Ultima riga Indicates the status of compressor: disabled, off, on or in alarm Indicates the status of the unit The circuit status can be: Stato Significato C1 C2 System active and in function CH CH+R PC Rec Defr chiller Chiller + total recovery Heat pump Total recovery Defrosting active Wait The circuiti s changing configuration The unit status can be:: Stato Significato C1 C2 System active and in function Unità off by alarm Serious alarm active that stops the system (check the list of alarms pressing the alarm button ) Off general by display Off by supervisor Off by time zone Off by digital input Off by display Manual mode Pressing DOWN System off by terminal (check On/Off mask) Systema off by supervisor Entire system off by time -zone Digital input (ID8) closed (system off) Off by terminal(check chiller mask) Compressors or pumps forced by mask will compare following masks: Status plant /cooling side Actual Set point (see the specific paragraph) Actual Differential (seel paragraph self adaptative differential Icon that indicates : heating, cooling Temperature outlet water If PID function active, shows the proportional factor Er and integral factor Ei Percentage power requested and percentage active user side Pag. 64/76 Pag. 64/76

65 Status recovery /Heating side Actual working Set point and actual differential. Icon indicates recovery or heating side Temperature on wich adjust the unit If active the PID function, will be shown the proportional factor Er and integral factor Ei Power requested and power active recovery side Status DHW tank You can see the water temp. procuced in DHW and internal water temp in the tank indicates request DHW (0..10 steps), antilegionella active, Indicates the recovery pump and wich pump If enabled recovery regulation with DHW the pump starts only if there is a request DHW. Subdivision of the request in the circuits. You can see the two circuits and the state of the same, Down can figure out which next compressor starts or stops. 5.5 Appendicx B. Menù general On/Off In the first two lines is described the mode of the plant ond recovery or cooling/heating sideldo 1 Enabled The system adjust based on the principal sensor according with the user side setpoint 2 Off by alarm User side/ recovery off by serious alarm 3 Off general System off by general enabling 4 Off by BMS System off by BMS serial 5 Off by timer System off by time zone 6 Off by dig.input 7 Off by display System off by digital input (ID8) System off by display 8 Antifreeze. System forced on for antifreeze In the last line is possible change the state of the unit: Off (all system in standby) ON (unit on) 5.6 Appendix C. Menù Impianto/ cooling side NB the values showned are default values Setting system mode: Off System does not produce cool/heat water ON System adjust based on the main sensor according plant setpoint On con set2 System adjust based on the main sensor according plant setpoint 2 Time zone System adjust only when time zones active. Select mode (only 2pipes unit): Cooling System produces cooling water Heating By temp.ext By Dig.input By Superv. System produces heating water Selection cooling / heating based on external temperature (s24) Contact closed : heating mode BMS system enabled From From calendari is selected heating mode. Calendar Setpoint 1 Setpoint cooling water Setpoint heating water (only 2pipes) (4pipes) Pag. 65/76 Pag. 65/76

66 5.7 Appendix D. Menù recovery/ heatin side NB i valori visualizzati nelle maschere corrispondono ai default Settings recovery mode Off NRP does not produce heating water recovery SI On con set2 The recovery adjust based on the main sensor according with setpoint The recovery adjust based on the main sensor according with setpoint 2 Fasce Recovery adjust only into the time zone orarie Settings recovery setpoint 5.8 Appendix E. Status inputs and outputs. If you want to see the status of the inputs / outputs of the machine and then press Prog and then Enter In this menu, you can have a summary of how the machine is working. Mask Meaning Indicates actual external air temp. In the last two lines are given the minimum and maximum temperature recorded during the day and during the previous day Displays the status of circuit circuit 1:: 0 Off 10 Wait Parztaliz. 15 Wait exit defrost. 1 Only chiller 11 Mode selected 16 Activ.Fans.exit defrost. 2 Chiller+Rec 12 Start defrost 17 Exit defrost 3 Heat pump 13 Wait Invers. VIC 18 No defrost.plant. 4 Only recovery 14 Defrosting 19 No defrost.rec Change function mode. Power requested and power active. Compressor status 1,2,3. The values can be: = Off Compressor off = On Compressor on Min.On Min.Off Compressor on in state minimum on comp, on the right side when it will end Compressor off and in minimum off comp, on the right side when it will end Off alarm Displays status circuit 1: See previous mask Compressor off by alarm, press Alarm button Fan 1. Summarizes the status of the fans and the sets and the sensors that control the fans. The last line is visible if is setted the common ventilation between the two circuits C1 Off C1 Press.Cond. C1 Chiller+Rec The fan in the circuiti s off The fans run according with high pressure(condensation) Fans off because uniti is working in water-water mode Pag. 66/76 Pag. 66/76

67 C1 Forza al max Fans forced to max speed because external temp.< 30 C C1 Press.Evap Fans adjust according low pressure(evaporation) Fan 2. Summarizes the status of the fans and the sets and the sensors that control the fans in case seperated ventilation. This mask is visible only if the ventilation is separated. Displays the state of the defrost of circuits 1 and 2 The status can be: 0 Off 10 Wait Partializ 15 Wait exit defrost. 1 Only chiller 11 Mode selected 16 Activ.Fans.exit defrost.. 2 Chiller+Rec 12 Start defrost 17 Exit defrost 3 Heat pump 13 Wait Invers. VIC 18 No defrost plant. 4 Only recovery 14 Defrost 19 No defrost.rec The parameter of Delta, indicates the decay of the low pressure. See paragraph defrost. Defrost status can be 0 No SBR. No defrost 1 Off Circuit off by off button, or by time zone, or by digital input 2 Sbr.Attivo Defrost active (the unit condensation is in the coil exchanger) 3 On Smart Defrost started by decay 4 On Min LP Defrost started by low pressure 5 On Reboot Defrost started by black out power supply 6 On Force Defrost started forced by button or forced for start of other defrost 7 On TGP Defrost started by high discharge gas temperature 8 End Liq.T Exit defrost for high liquid temperature 9 End Tempo Exit defrost for max time 10 End Force Exit defrost forced by button 11 Startup Cmp Defrost disabled for time after startup compressors 12 Alta P.Evap Defrost disabled for high evaporation pressure 13 Alta T.Ext Defrost disabled for high external temperature 14 T.Bw Sbr. Defrost disabled for waiting time between two defrost 15 Alarmi Circuit in alarm 16 On da Alarm Displays the status of valves circuit 1 AP High pressure Defrost started for alarm off BP LiqT TgP Fan vic vir Low pressure Liquid Temperature Discharge gas temperature Fan speed Inversione Valve side plant Inversione Valve side recovery Vs1 Solenoide valve 1 Vs1a VsB Solenoide valve 1a Tapping valve coil exchanger fans Pag. 67/76 Pag. 67/76

68 VsR VsE By Tapping valve recovery exchanger Tapping valve evaporator exchanger Tapping valve defrost Compressor status On Pressing Enter displays the temperature converted from pressure. Off See next mask 5.9 Appendix F. Menù Service -Various Necessary only in special units! Description display Description Description valuesi UOM Min Max R/W Is possible to change password RW 5.10 Appendix G. Menù Service-Manual Description display Description Description Values UOM Min Max R/W Force the start or the end defrost 0: No R/W circuit 1 1: Si Force the start or the end defrost circuit 2 Force start pumps user/recovery side. Take in account eventual alarms 0: No 1: Si 0: No 1: Si R/W R/W Force antifreeze heater Forforce ventilator fans. Take in account eventual alarms Disable compressors circuit 1 0: No 1: Si 0: No 1: Si 0: No 1: Si R/W R/W R/W Disable compressors circuit 2 0: No 1: Si R/W 1.1 Appendix H. Sizes 1404, 1504, 1655 Necessary only in units 1404, 1504, 1655! Go to Service and digit password 0442, Pag. 68/76 Pag. 68/76

69 Go to plant config Plant config. Description display Description NRP1044 NRP1504 NRP1655 UOM Min Max Select 2 pipes + DHW or 4 pipesi In 2pipes mode in winter: priority to recovery or to plant 0 1 Circuit number Number of compressors per circuit Number of compressors per circuit The circuits can be unbalanced Percentage circuit 1 44% 50% 46% % Percentage circuit 2 56% 50% 54% % In the same circuit the compressors can be with different size Percentage compressor 1 50% 50% Percentage compressor 2 50% 50% Percentage compressor 3 0% 0% 50% 50% 50% 34% 50% 50% 50% 33% 0% 0% 0% 33% % % % \ Pag. 69/76 Pag. 69/76

70 5 Alarms By pressing the Alarm key you can view the list of active alarms. Each alarm is uniquely identified by a 4-digit alarm code. Alarm codes can be found in the previous pages (alarms overview table). The last row shows how many alarms are currently active. 5.1 Alarm history At any time, you can view the history of the last 100 alarms occured in the system. At every event you can have: Date and time (alarm start) Alarm number and brief description Plant/cold side input/output temperature (Chiller, heat pump) Recovery/heat side input/output temperature Compressors status in the two circuits Status of the two circuits Status Meaning Off Circuit turned off CH Chiller CH+R Chiller plus total recovery HP Heat Pump AL Circuit on alarm Rec Total recovery Defr Defrost enabled Wait The circuit is changing its operating mode No D. Defrost not available (circuit Off) Date and hour Nature of the alarm tripped Plant/cold side required percentage Recovery/heat side required percentage High pressure in the two circuits Low pressure in the two circuits Plant and recovery pumps status For an ordinary user it is not possible to reset the alarm log. Upon reaching the last location of the alarm history, the software will overwrite the first alarm (which was the older one) with the last one occurred. 5.2 Alarm list Type of reset: Auto = Automatic, at the end of the event that triggered the alarm, the latter turns off. Man = Manual. To resume normal operation, a manual recognition is necessary. Semi = Semi-Automatic, the alarm is automatic, but if it occurs more than 3 times within an hour, it becomes manual. Code Alarm text Notes Delay Manual reset AL01 Clock battery broken or not connected yes AL02 Memory expansion corruption yes AL03 ID8 Phase monitor AL04 Card reboot due to power failure NO it is an alarm AL05 Circuit 1 high pressure probe broken or not connected B1 30s AL06 Circuit 2 high pressure probe broken or not connected B6 30s AL07 Circuit 1 low pressure probe broken or not connected B2 30s AL08 Circuit 2 low pressure probe broken or not connected B7 30s AL09 Evaporator inlet water temperature probe broken or not connected B4 30s AL10 Evaporator outlet water temperature probe broken or not connected B3 30s AL11 Evap.com. outlet water temperature probe broken or not connected B3 upc 30s AL12 Recovery inlet water temperature probe broken or not connected B1 upc 30s AL13 Recovery 1 outlet water temperature probe broken or not connected B2 upc 30s AL14 Recovery 2 outlet water temperature probe broken or not connected B6 upc 30s AL15 Joint recovery outlet water temperature probe broken or not connected B4 upc 30s AL16 Outside temperature probe broken or not connected B9 30s AL17 Circuit 1 fluid temperature probe broken or not connected 30s AL18 Circuit 2 fluid temperature probe broken or not connected 30s AL19 Circuit 1 compressors maintenance request: yes AL21 Recovery pumps maintenance request, Pump 1: yes AL22 Recovery pumps maintenance request, Pump 1: yes AL23 Circuit 1 compressors thermal overload: yes AL24 ID13 Pump 1 thermic system alarm ID 6, yes AL25 ID14 Pump 2 thermic system alarm yes AL26 Recovery pump 1 thermic alarm yes Pag. 70/76 Pag. 70/76