User, Installation, and Maintenance Manual

Transcription

1 ONEPLUS Centrifugal, Modulation Warm Air Heaters User, Installation, and Maintenance Manual It is forbidden to totally or partially copy or reproduce this document for disclosure to third parties without written consent by Apen Group S.p.A. Page 1 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

2 SUMMARY SECTION 1. GENERAL WARNINGS... 4 SECTION 2. SAFETY WARNINGS Fuel Gas Leaks Voltage Use Maintenance Transport and Handling... 5 SECTION 3. TECHNICAL FEATURES Efficiency Technical Data Dimensions Operating Cycle Operation, Air/Gas Premix, and Setting Modulation Room Compensation Working with Kondensa.net SECTION 4. USER S INSTRUCTIONS Basic Working Mode (no Accessories) Working with a Remote Control (G15100) Working with a Chronothermostat Running and Setting the Chronothermostat Antifreeze Protection Room Compensation Summer Ventilation Working with APEN Remote Control (G15950) Basic Accessories Mixing Box and Filters Cooling Section SECTION 5. APPROVAL CERTIFICATE SECTION 6. INSTRUCTIONS TO THE INSTALLER General Installation Rules Flue Piping Electrical Wiring How to Connect an External Gas Valve Gas Connections Page 2 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

3 SECTION 7. INSTRUCTIONS TO SERVICE STAFF Country Table - Gas Category Gas Setting Data Table First Start-up Combustion Analysis Conversion to Liquid Propane Gas Conversion to G25 - G25.1 Gas Conversion to G2.350 Gas Maintenance Cleaning the Exchanger Demolition Replacing the Modulation Card Replacing the Gas Valve and Setting the Offset CPU-PLUS Card Parameters How to set Chronothermostat Parameters How to set Remote Control Parameters SECTION 8. TROUBLESHOOTING A BASIC UNIT SECTION 9. TROUBLESHOOTING A UNIT WITH CHRONOTHERMOSTAT 52 SECTION 10. TROUBLESHOOTING A UNIT WITH REMOTE CONTROL 53 SECTION 11. LOCK TROUBLESHOOTING SECTION 12. WIRING DIAGRAMS SECTION 13. SPARE PART LIST Page 3 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

4 1. GENERAL WARNINGS This manual is an essential component of the product and must always accompany it. If this equipment is sold or transferred to another owner, make sure the manual follows it, to enable the new installer/owner to consult it. The manufacturer disclaims any liability (under contract provisions or otherwise) for damage to persons, animals, or objects resulting from wrong installation or misuse, and/or non compliance with the manufacturer s instructions. This unit is intended only and exclusively for the use for which it has been built. Any different, wrong, or unreasonable use is to be considered improper and therefore dangerous. For installing, running and maintaining the unit, the user shall strictly follow the instructions stated in this manual and comply with existing national laws and regulations. Any installation, maintenance or servicing operations shall be performed only by authorised personnel,with specific technical skills in the heating field. First start-up, conversion to another gas type and maintenance must be exclusively carried out by qualified personnel appointed by Apen Group authorised Service Centres, in compliance with National laws and regulations.. Installation operations shall comply with the laws and regulations existing in the Country where the appliance is installed. APEN GROUP s business organization can count on a widespread network of approved Technical Support Centres. For information, contact your local Representative or directly the Manufacturer. The unit is covered by a guarantee whose conditions and validity are specified on the relevant certificate. The manufacturer declares that the unit is workmanlike built in compliance with UNI, UNI-CIG, and EC technical provisions, and according to the relevant laws and to the Directive on Appliances burning gaseous fuels 90/396/EEC. Referenced European Directives: - UNI-CIG 7129 regulating appliances fired with natural gas; - Gas Directive 90/396/EEC. - Low Voltage Directive 2006/95/EEC. - Machinery Directive 2006/42/CEE - Electromagnetic Compatibility Directive 2004/108/EEC. 2. SAFETY WARNINGS This section describes the safety rules for operators. 2.1 Fuel Before starting the heater, check that: - Gas supply specifications match those written on the rating plate - Combustion air inlet pipes (if installed) and flue discharge pipes are exclusively those specified by the manufacturer - The grid of combustion air intake system is free from debris, leaves, etc. - The gas seal of the feeding system has been tested and approved in compliance with the law. - The heater s fuel is the one specified for the unit - The unit is correctly sized to match required flow and includes all safety and control devices required by the law - Gas pipes and air distribution ducts for ducted heaters have been properly cleaned - Fuel capacity is adjusted to match equipment heat rating - Gas feeding pressure matches values on rating plate. 2.2 Gas Leaks If you smell gas: - Do not operate electrical switches, the telephone or any other object or device that can cause sparks. - Immediately open doors and windows to vent the room. - Close gas valves. - call for qualified personnel. 2.3 Power Supply The heater shall be correctly wired to an efficient grounding system, complying with existing regulations (CEI 64-8). WARNING: - Check the grounding system or have it checked by qualified personnel, if necessary. - Make sure network wire gauge suits the unit rated input shown on rating plate and in this Manual. - Do not mistake neutral and phase wires. The heater can be plugged into mains using a plug-socket only if the latter prevents any mistake between phase and neutral wires. - The system wire gauge in general, and cable section in particular, must suit the unit rated input shown on equipment rating plate and in this Manual. Do not pull electrical wires and keep them far from heat sources. REMARK: A multipole switch with fuses and contact opening greater than 3 mm should be installed before the supply cable, in a visible and accessible position and within 3 meters from the control board. Have any installation or maintenance operation concerning the electrical system be accomplished by qualified personnel. Page 4 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

5 2.4 Use Children and inexperienced people shall not be allowed to use any electrical appliance. The following precautions shall be adopted: - Do not touch the unit with wet or damp parts of the body and/ or barefoot. - Do not leave the unit exposed to adverse weather conditions (rain, sunshine, etc.) unless the unit has been expressly designed to. - Do not use gas pipes to ground electrical devices. - Do not touch hot surfaces of the heater, such as flue pipes. - Do not wet the unit either with water or other liquids. - Do not put any objects on the unit. - Do not touch moving parts of the heater while it is working. Should damages or missing pieces result, immediately inform the supplier. The manufacturer is not liable for any damages occurred during transport, handling, or unpacking. 2.5 Maintenance Before running any servicing or cleaning, disconnect power and gas supply by means of main ON/OFF switch and/or by closing appropriate detection devices. In case of failure and/or insufficient running standards, switch off the heater and do not attempt to repair it directly. Contact the authorised Service Centre. Use only original spare parts for repairs. Failure to follow above instructions could compromise the unit safety and shall void the warranty. If the unit is not used for long periods, shut the gas off through gas cocks and disconnect the unit from power supply. If the unit is to be definitively decommissioned, in addition to above suggestions, any potential source of hazard shall have to be made inoffensive. It is mandatory that the inlet of the Venturi tube on the burnerfan assembly is kept free from any debris or obstructions (see figure in this page). In case it is not, a backfire from the pre-mix burner might occur. 2.6 Transport and Handling The heater is delivered fastened to a pallet and covered by paperboard. If required, the heater can be delivered packed on a pallet, in a crate or in other forms. Unload the heater from truck and move it to the installation place using a convenient system, suited to the weight of the load. If the unit is stored at the customer s premises, make sure a suitable place is chosen, sheltered from rain and excessive humidity. Any lifting and transport operations must be accomplished by skilled personnel, adequately trained on working procedures and safety rules. Once the unit is placed in the right spot, you can start unpacking it using suitable tools and protections, where necessary. Materials resulting from unpacking shall be disposed of according to relevant regulations. While unpacking the unit, check its integrity and its compliance to the order. Should damages or missing pieces result, immediately inform KEEP FREE AND UNCLOGGED! HG0030 IM 001 Page 5 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

6 3. TECHNICAL FEATURES Centrifugal modulating heaters series ONEPLUS are designed to heat and cool industrial and commercial buildings. Units in ONEPLUS range are formed by a heating module, including an exchanger and a pre-mix burner burning natural or propane gas, and by a cooling module, equipped with centrifugal fans and motors driven through belts and adjustable pulleys. Units can be installed outdoor (PLE models) or indoor (PLA models). A wide range of accessories is available, including a mixing box with filters and a cooler (chilled or direct expansion water coil). Their electronic card continuously modulates between minimum and maximum output, adapting the output to real heating needs. They take advantage of premixing and modulation technology in order to guarantee top efficiency levels up to 94%. The heater works as a standalone unit. In order to start it up, just connect it to power and gas supply. The unit s heat output ranges from 11.8 to 92.0 kw. The heat exchanger complies with production requirements for gas equipment set by EN1020 regulations. The combustion chamber is entirely built in AISI 430 stainless steel while tube bundles are made of AISI 441, in order to assure high resistance to corrosion of wet flue. The leading-edge design and the wide surface of the furnace and tube bundle guarantee optimum efficiency and durability. The burner is entirely built with stainless steel, and it takes advantage of special mechanical solutions to guarantee optimal reliability and performance rates, as well as high thermal and mechanical resistance. Indoor Version PLA Outdoor Version PLE Page 6 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

7 3.1. Efficiency The main characteristic of ONEPLUS heaters is modulation, which means that thermal power output, and therefore power input and fuel consumption, vary according to heating request. When less heat is needed, the heater reduces gas consumption and increases efficiency up to 94.5% (efficiency upon Hi) Intrinsic Safety A sophisticated technique of air/gas mixing and the simultaneous adjustment of combustion air and gas flows provide an increase in efficiency at minimum output. This feature increases the unit s safety, since the air/gas ratio is always the one set by the manufacturer. As opposed to atmospheric burners, in premix units the CO 2 content does not change throughout the operative range of the heater. 3.2 Technical data PLA024 PLE024 If combustion air fails, the gas valve shuts up. If combustion air decreases, the valve automatically reduces gas flow without compromising optimal working parameters. Low Pollution Pre-mix burners equipped with an air/gas valve allow clean combustion with very low polluting emissions. PLA032 PLE032 PLA035 PLE035 TECHNICAL DATA U.M. Type of Appliance C13 - C33 - C43 - C53 - C63 - B23 CE Approval P.I.N. Nox Class val Rated Heat Input (m in/m ax) kw 20,0 26,5 24,0 34,8 25,5 38,8 Rated Heat Output (m in/m ax) kw 18,8 24,4 22,6 31,5 24,0 35,0 Efficiency (m in/m ax) % 94,0% 91,9% 94,0% 90,5% 94,0% 90,1% Ø gas connection Ø of air inlet/exhaust pipes m m 80/80 UN I ISO 7/1-3/4" M 80/80 80/80 Available flue pres sure Pa Air Flow Rate m 3 /h Air tem p. Increas e (MIN/MAX) C 17,4 23,0 20,8 30,2 22,2 33,7 Available head (L-H series) Pa Fan type Fan m otor (L-H s eries ) kw Single 0,75 1,1 Single 0,75 1,1 Single 0,75 1,1 Supply Voltage V 1PH 230V/50Hz 1PH 230V/50Hz 1PH 230V/50Hz Min/Max Operating Tem perature C PLA054 PLE054 PLA072 PLE072 PLA092 PLE092 DATI TECNICI U.M. Tipo di apparecchio C13 - C33 - C43 - C53 - C63 - B23 Omologazione CE P.I.N. Classe NOx val Portata termica nominale (min-max) kw 40,0 58,0 58,0 78,0 75,0 100,0 Potenza termica nominale (min-max) kw 37,6 53,0 54,5 71,5 70,5 92,0 Rendimento (min-max) % 94,0% 91,4% 94,0% 91,7% 94,0% 92,0% Ø Attacco gas UNI ISO 7/1-3/4" M UNI ISO 7/1-1" M Ø Tubi aspirazione/scarico mm 80/80 100/ /100 Press. Disponibile scarico fumi Pa Portata aria m 3 /h Incremento temperatura aria (min-max) C 19,8 28,7 22,2 29,8 22,6 30,2 Prevalenza disponibile (serie L-serie H) Pa Tipo ventilatore Binato Binato Binato Motore ventilatore (serie L-serie H) kw 1,5 2,2 2, Tensione di alimentazione V trifase 400V/50Hz trifase 400V/50Hz trifase 400V/50Hz Temperatura min/max di esercizio C * For I 2S category [Hungary] maximum heat input is 96.0 kw and minimum input is 72.0 kw Page 7 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

8 3.3 Dimensions 50 B L 50 H HM 135 BB LM DIMENSIONS BASE DELIVERY INTAKE HEATER L B H LV LB BB LM HM LA HA 024 / 032 / LA S BO TO Ø F Ø A 130 HA GV GO LB A F Combustion Air Inlet Pipe Flue Pipe LV Page 8 FLUE EXHAUST/INTAKE GAS SUPPLY HEATER A F BO TO S GAS GO GV 024 / 032 / /4" " code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

9 3.4 Operating Cycle IMPORTANT: You can change card parameters only if a chronothermostat or a remote control is installed. Running the Burner If a chronothermostat or remote control is available, you can use a NCT2 room temperature sensor to set heat request at burner start-up. No matter if electronic controls or the basic version of the heater are available, start-up cycle is launched only if 7-9 terminal of CN6 board is closed on CPU-PLUS card [A]. When launching start-up cycle, the CPU-PLUS card starts burner fan [A] and the furnace is pre-washed for a default period. When pre-washing ends, the CPU-PLUS card enables the ACF flame control device to turn the burner on. Then, it opens the EV1 [B] and EVP [B] solenoid valves that feed pilot burner [B]. Pilot burner start-up cycle is then launched by means of EA ignition electrode. Instead, the ER detection electrode checks the firing of pilot flame. Once the working condition is confirmed, ACF device opens the main EV2 gas valve [C] thus feeding the main burner. Pilot and main burners work simultaneously for a short period, then the modulation card closes the EVP electrical valve [D], thus turning pilot burner off. Flame is monitored also on main burner by ER detection electrode. The start-up cycle turns the burner on at intermediate capacity (about 70% of max. input). Around 30 seconds after start-up, the burner starts modulating and reaches the capacity required. During regular work, the modulation card adjusts burner heat input based on the temperature value measured by the NTC1 modulation sensor, installed on the back of the heater, near intake of room air. Cooling Fans The modulation card [E] controls cooling fan start up and scheduling. This schedule begins with main burner [C] start up. A delay in fan start-up prevents blowing cold air into the room. The default delay can vary from 0 to 255 seconds [C3 Parameter]. If [C3] parameter is zeroed, the fan and the burner start together. EV2 HG0106 C2,034 EV1 EVP Flue Air Gas Turning off the Burner When no more heat is required [F], i.e. room temperature exceeds set point, the modulation card stops the burner [F]. The burner fan keeps venting the furnace for the post-washing period. The length of this period is set by the manufacturer and cannot be changed [G]. A BC D E F G H Burner assembly Control device EVP Heating request Burner fan EVP - Pilot flame EV2 EV1 EV1-1st gas valve Detection electrode EV2-2nd gas valve Start-up electrode Cooling Fan HG0106 C2,026 pilot burner Nozzle Page 9 code HG GB ed A-0907 rev.09 HG0040 C2 001 APEN GROUP reserves the right to change products and documents as required.

10 The same happens for heater cooling fans, that keep working long enough to cool down the heater [H]. The default delay can vary from 0 to 255 seconds [C4 Parameter]. REMARK: Do not set C4 parameter below 90 seconds, which is the minimum threshold for furnace cooling period. This is why it is forbidden to power off the unit while burner is running. If post-washing is too short and the exchanger is not correctly cooled down, the following problems may arise: - Shorter life of the heat exchanger and voidance of the guarantee - The safety thermostat triggers and will require manual reset. - Burner fan may break If, during the cooling cycle, a new heat request is issued, the modulation card will wait for the fan to stop, zero any counts, and start a new cycle. F4 - Four close flashes of red LED F6 - The green and red LEDs flash alternatively F8 - Continuous flashes of red LED If a chronothermostat is installed, light is steady. Reset Button A button for manual reset is provided on the heater. If no remote control is available, you can use this button to unlock the unit after a F1, F2, F3, or F8 lock. Summer/Winter Switch A summer/winter switch is installed on the heater. If no remote control is available, this button allows to switch working mode from winter (burner on) to summer (burner off - ventilation only). REMARK: If no chronothermostat nor remote control are available, we recommend to remotely control reset button and summer/winter switch from M1 terminal board (installed inside burner compartment). Safety Thermostats A safety thermostat with manual reset and positive safety is installed for each fan on the heating module. If the sensible element breaks, a failure occurs. The thermostat is installed after the exchanger in order to control the temperature of delivered air. When the thermostat triggers, the flame detection device locks, turning off the burner. This lock is displayed as F2. Fx locks The modulation card installed on the heater can detect 6 different types of locks: F1 - Device locked due to lack of flame. F2 - Safety thermostat locked. F3 - Lock caused by burner motor. F4 - Lock caused by one of NTC sensors. F6 - CPU-PLUS card locked. F8 - Faulty flame control device. F1 and F2 locks are caused by safety items and are nonvolatile, i.e. they are not removed if you power off and then on again the unit. They require a manual reset. F3, F6, and F8 locks require manual reset or you can power off and then on again the heater. F4 lock automatically disappears when its cause is removed. Button - Switch SUMMER/0/WINTER Reset Button On PLA indoor heaters, buttons are installed on the back of the unit, near gas connection, while LEDs are placed on the front of the heater. In PLE outdoor heaters, RESET button, SUMMER/OFF/WINTER switch and GREEN &RED LEDs are all located inside burner compartment. REMARK: See user section for more information on unlocking after F1 and F2 non-volatile locks. LED On the front of the unit a green LED and a red LED are provided. The green LED is on when the heater is powered while the red LED on indicates that the heater is locked. You can immediately tell which type of lock has triggered from LED s flashing sequence and speed, i.e.: F1 - Red LED steady on F2 - Two close flashes of red LED F3 - Three close flashes of red LED Page 10 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

11 3.5 Operation, Air/Gas Premix, and Setting A burner that completely pre-mixes air and gas is mounted on ONEPLUS heaters. Air and gas are mixed inside the blades of the fan motor assembly. Air is taken in through the Venturi pipe where gas is drawn by air vacuum. Air/gas ratio cannot be changed. The air / gas pressure ratio is 1:1 and it can be adjusted by means of the offset screw on the gas valve. The heater comes with a default offset value and the screw is sealed. The burner can also be regulated by adjusting the screw on the Venturi which sets the value of maximum gas flow rate and therefore determines the carbon dioxide content (CO 2 ) in the flue (the offset curve changes). This setting is a factory default but the screw is not sealed in order to allow conversion to another gas. REMARK: To learn how to regulate the offset value an the CO 2 content, see the Assistance by the Service Centre section. The modulation card installed on the heater regulates the motor s revolution speed (in DC) according to the useful heat required. When motor revolution speed changes, air flow rate changes as well, thus modifying gas flow rate. Values for minimum and maximum rotation speed of the fan are set by the manufacturer and cannot be changed by the user or the installer. thermal stratification (heat loss due to convective air), assuring values below 0.5? per meter, and it maximises heater efficiency (working at low thermal outputs, the heater delivers at efficiency levels higher than 94%). These results can only be achieved when weather and environmental conditions are carefully monitored and the heater is run at optimum level. When sizing the heater, particular attention should be paid to the number of air recirculations per hour. It is recommended to choose a heater that, independently from its heat rating, guarantees at least two recirculations per hour. ONEPLUS heaters include a room temperature sensor (NTC1) installed on heater delivery where it can monitor air temperature after the exchanger. When modulating, the value detected by this sensor is used as for comparison to the value set in the microprocessor. Modulation temperature must be fine-tuned while the unit is working. Modulation temperature value is set to 45? by the manufacturer Efficieny T air Pressione (Portata) gas correct curve 1:1 curve Efficiency % Heat Output [%] T delivered air HG0103 EG 003 IT_ed Modulation Page 11 Pressione (Portata) aria code HG GB ed A-0907 rev.09 HG0103 EG 002 IT_ed.0507 Suspended air heaters series ONEPLUS are modulating units that allow numberless power output levels between a minimum and a maximum value. Maximum output is used to quickly warm the room when the heating equipment is started. On the contrary, flame modulation allows to keep steady the temperature level required as it constantly adjusts heat input to real requirements. This continuous automatic adjustment of heater output to room requirements sensibly reduces the temperature of delivered air. It also has two other advantages: it minimises Above chart shows the efficiency trend and differences in delivered air temperature when heat input decreases. For information on changing modulation parameter [ REG DHW for chronothermostat or ST1 for remote control] and reading modulation temperature [ DELIVERY TMP for chronothermostat or NTC1 for remote control], see further in this Manual. APEN GROUP reserves the right to change products and documents as required.

12 3.7 Room Compensation IMPORTANT: This function is only available if a chronothermostat or a remote control is installed. The following paragraph describes a specific operating mode of new CPU-PLUS card that assures maximum energy efficiency to the heater. In order to activate room compensation mode, set C1 parameter to 1. The compensation function is particularly useful when you want to rapidly reach a comfortable room temperature and maintain it, while reducing air stratification and, above all, consumption. Compensation uses two reference values: the temperature measured by NTC2 sensor (room temperature) and the temperature detected by NTC1 (modulation sensor). Set A12 parameter to 1 to activate NTC2 sensor. While room temperature gets nearer to set point value, modulation temperature changes linearly based on A16 and A24 parameter settings. Therefore, at the beginning, the heater can deliver maximum output to quickly reach the room temperature value set by the user. Then, it can reduce its output and increase its efficiency by heating the room with slightly cooler air. Air stratification in the room is therefore reduced, together with heat loss. Default values set by the manufacturer are the following: Modulation temperature [ST1 or REG DHW] 24? Compensation neutral areaa24 2? Compensation factor A To disable compensation, restore C1 parameter to 0. If you disable compensation, you have to set ST1 [or REG DHW] parameter so as to avoid following conditions: - ST1 value too high Excessive stratification and heat losses from the roof - ST1 value too low It takes longer to reach required room temperature. For instructions on changing modulation parameter [ REG DHV on chronothermostat or ST1 on remote control] and all the other parameters described, see below in this Manual. Compensated ST1 3.8 Working with KONDENSA.NET modulation temperature room temperature KONDENSA.NET is an interface application that can be used to manage the heater when a CPU-PLUS card is installed. This application allows the user to quickly set up a simple network to manage one or more units. Its user-friendly interface eases any regulations of different room temperatures and allows rapid troubleshooting when failures or locks occur. Please refer to KONDENSA.NET Manual for instructions on wiring, installing and using the application with heaters. A24 parameter sets the room temperature range where compensation is active. A16 parameter is a multiplier that increases the efficiency of temperature reduction on ST1 set point [or REG DHW], as shown in previous chart. When room temperature is reached with standard settings, modulation temperature is the following: ST1=24 C-(2 Cx2.5)=40? Compensation is independent from the room temperature value that has been set. The chart below shows trends for room [ST2] and modulation [ST1] temperature referred to period of time elapsed from heater start-up in compensation working mode. Page 12 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

13 4. INSTRUCTIONS TO THE USER Read carefully the General and Safety Warnings section. User s operations on the heater are limited to regulating controls for heater regular running. The following is a short description of how the heater runs using a CPU-PLUS card with or without accessories. Different procedures are required to meet different user requirements. 4.1 Basic Working Mode (no Accessories) This basic working mode is available on any heater and allows controlling it simply and directly. REMARK: At least one room thermostat is required in order to switch the burner on and off. ON/OFF The heater is turned on and off using the 7-9 terminal of M1 board, installed inside the control unit. REMARK: DO NOT power off the heater while it is running because this would prevent the heat exchanger from being cooled down, thereby reducing its life and jeopardising its efficiency. SUMMER/WINTER The heater includes a unipolar switch that toggles between summer and winter mode (ventilation only/heating on). This switch allows the heater to be useful all year long, either for heating or ventilating a room. Turn the switch on the relevant icon: winter in Winter and summer in Summer. This mode is controlled through terminals # of M1 terminal board in burner compartment. These contacts can also be used when a remote control is installed. For instructions on wirings, see the Instructions to the Installer section. REMARK: The summer/winter switch on the unit must be set to winter position to remotely control this mode. Failure Display Two LEDs (green and red) are installed on the heater. They indicate the heater running mode (green LED) and the lock type (red LED) at a glance. Green LED on means that the heater is powered while different flashing sequences of the red LED identify the following F failures and locks: F1 - Red LED steady on F2 - Two close flashes of red LED F3 - Three close flashes of red LED F4 - Four close flashes of red LED F6 - The green and red LEDs flash alternatively F8 - Red LED flashing continuously If a chronothermostat is installed, light is steady. Failures (locks) detected and reported by the CPU-PLUS modulation card are the following: - F1 - Flame device lock due to burner start-up failure. Before displaying the lock, the CPU-PLUS modulation card automatically runs a sequence of reset attempts - F2 - Safety thermostat is locked since the thermostat on the front of the heater has triggered If detected temperature is too high, the thermostat triggers and stops the heater. - F3 Faulty flue fan - The combustion air fan is damaged or the signal returned to modulation card does not match the number of revolutions required. - F4 - Faulty or wrongly wired sensor. Sensor readout exceeds measure range. This is valid both for NTC1 (delivery) and NCT2 (room) sensors. - F6 - CPU-PLUS card is locked - This is due to a certain number of unsuccessful attempts to turn the heater on in a given period of time. If this occurs, the LED installed on the electronic card lights up too. For more information on unlock procedure, read the note in Unlocking paragraph. - F8- The modulation card has issued start-up signal to flame control device but has not received start-up confirmation feedback. The flame control device is faulty. F1 and F2 locks are caused by safety items and are therefore non-volatile, i.e. they are not removed if you power off and then on again the unit. They require a manual reset. F3, F6, and F8 locks require manual reset or you can power off and then on again the heater. F4 lock automatically disappears when its cause is removed. Page 13 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

14 UNLOCKING If the heater is locked, you can unlock it manually using the reset button. Press the button and release it. The red LED turns off and the heater starts a standard operating cycle. You can remotely control reset button by connecting it to 6-9 terminals of M1 board (inside burner compartment). For instructions on wirings, see the Instructions to the Installer section. 4.2 Working with a Remote Control (G15100) In order to ease your use of ONEPLUS heater, Apen Group offers an optional device by which you can remotely control the main functions of the unit. G15100 remote control allows the user to control ON/OFF [0/ I] command, summer/winter switch and reset button. Please wire this remote control according to the following diagram. WARNING: If the heater does not restart after three reset attempts, call your Service Centre. REMARK: When a F6 lock has triggered, the red LED is steady on and the equipment does not work. If you press the reset button, the heater does not start and remains locked. To reset a F6 lock you need to power off and then on the unit or reinitialise the card using LOCK switch on the card itself. HG _C2_005 IT_ed.0609 If any maintenance is necessary, please pay attention to M1 board and cable numbering. HG _C2_024 IT_ed.0609 COLORS 1 - Brown 2 - Grey 3 - Black 4 - Blue Page 14 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

15 4.3 Operation with a Chronothermostat Read General and Safety Warnings sections on page 3. User s operations on the heater are limited to regulating chronothermostat options. REMARK: The red LED is permanently lit when a chronothermostat is installed. The heater operation can be completely automatic. An electronic self-checking device handles any control operations of the burner while an electronic card with built-in microprocessor uses the processor-assisted chronothermostat and a temperature sensor to regulate room temperature. A chronothermostat and an electronic card control every setting and working function, whereas all safety functions are monitored through flame control device and safety thermostats. Chronothermostat LCD Features of the Chronothermostat Weekly planning 4 different daily temperature levels [T1, T2, T3 and antifreeze] Default base program Temporary override of set temperature Automatic or manual operation and scheduler Antifreeze protection Self-regulation of heater capacity according to room requirement Display of working condition Display of locks or failures Reset command No batteries required Two-wire connection without polarity A flame displayed on the LCD indicates that the burner is on. Failure Display The chronothermostat can display some failure messages and provide diagnostic information: Failure The display is completely off. Meaning Backup battery has run out because the chronothermostat was disconnected from mains supply for more than five hours. Power the unit on, wait until the display turns on, and set date, time and room temperature schedule as required. One hour is required to restore backup battery. Note: In case of a power failure longer than 5 hours, parameters saved on the chronothermostat are lost. All required parameters for heater operation are permanently stored in the card installed on the heater. Therefore, only time, date, and schedule information have to be reset. The chronothermostat does not require any specific maintenance. Do not clean it with detergents and avoid using sharp objects on it. Resetting the Unit Should a failure occur, the failure symbol starts flashing and the LCD displays BOILER RESET. To reset, do the following: - If the failure requires the user to reset the unit, the LCD shows a triangle under the K1 (RESET) key. - If you have solved the problem that caused the failure, press K1 to restore standard operating mode. - Press K4 key to access the view of heater and/or remote control failures. - Error # is displayed followed by the number indicating the failure. The failures (locks) detected and logged by the modulation card-chronothermostat assembly are those listed on page 14 and described in the Troubleshooting section. Press KM key (in next page figure) to return to unlock menu. REMARK: Before trying and restarting the heater, wait at least for 20 seconds from turning it off. Page 15 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

16 4.4 Running and Setting the Chronothermostat Warning: Always use your fingertips to press the keys. Sharp tools, such as pens or pencils, could damage the device. Operating Mode During regular work, the remote control displays: Current date and time Room temperature a radiator icon (CH mode) the scheduler bar (for CH - AUT mode, if enabled) a 4 next to K+ and K- keys. How to Select Menu Pages While the chronothermostat is working in standard mode, press the KM key to open menu pages. Page 1 allows you to choose among the following options: CH DWH INFO >> Press K4 (>>) key to switch to Page 2. The following options are available: PRG SET CLK >> Use K4 (>>) key to toggle between Page 1 and 2. Language setting When you first turn on the chronothermostat, the menu for selecting user language appears. The LCD shows: ENGLISH OK Press K4 key (OK) to confirm. If you want to choose another language, use K+ or K- to select it, then press K4 (OK) to confirm. Note: Any information in this Manual refer to English. How to change user language If you want to change user language, press KM for about 8-10 seconds until the following string appear: INFO SET ERR >> Press K4 (>>), then K1 (LAN). Use K + and K - to select the required language. Press K4 (OK) to confirm. Wait a few seconds to quit automatically the menu or press KM to quit immediately. Heating Scheduler Chart Heating Day [MO-SU] Hour OFF Mode Burner ON Alarm M e a s u r e d K+ Button K- Button HG0103 C2,026 K1 Button K2 Button K3 Button K4 Button KM Button Text Bar Page 16 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

17 How to set day and time Day/Time Setup Mode (CLK) Press KM, then K4 (>>) to open Page 2. Use K3 (CLK) to select setup mode. From the menu, choose one of the following: DAY HRS MIN Day/Time Setup Mode (CLK-DAY). Press K1 (DAY). Use K+ or K to set current weekday. Days flash in turn on the LCD: from - SU Sunday to SA Saturday Day/Time Setup Mode (CLK-HRS). Press K2 (HRS) to switch to current time setup. Use K+ or K keys to set current time. Time display format (24 hours or AM/PM) depends on the setting in SERVICE - SET (HRS TYPE) parameter. Day/Time Setup Mode (CLK-MIN). Press K3 (MIN) button to switch to current minute setting. Use K+ or K keys to set current minutes. The menu automatically closes a few seconds after setting is complete. To exit immediately, press KM. How to set up the weekly schedule for Heating mode (HEAT) Press KM to open Page 1, then press K1 (CH) to select Heating mode menu. Once the menu is open, choose one of the following: AUT ON OFF CLK Note: In this menu, CLK relates to scheduling function and is different from the CLK option previously described. CH - OFF Heating mode If you press the K3 (OFF) key, the heating mode is disabled. No selection is allowed when the heater runs in heating mode. When heating mode is OFF, the radiator icon and the scheduler bar disappear from the LCD. However, even when heating mode is OFF, the antifreeze feature is enabled (+5 C/+41 F) CH - CLK (scheduler) Heating mode Press K4 (CLK) key to enable scheduler heating mode. This forces the room thermostat to work for a fixed period at a given temperature. The heater works in heating mode based on the selected room temperature and on the period set in the scheduler. Press K1 to access the scheduler setting within its range or K4 to select the required room temperature from the list of available temperatures for the scheduler. You can change both parameters after selecting them using K+ e K- keys. When you select this menu, default timing parameters for scheduling are displayed together with the room temperature level (T1, T2, or T3) that is currently enabled based on CH scheduler schedule. The menu automatically closes at timeout. To exit immediately, press KM. When CLK heating mode is enabled, TIMER is highlighted on the LCD. Once the scheduling has timed out, the heating mode that was active before starting the setup is restored. T1, T2, and T3 values setting (before setting the CH - AUT Heating mode Press K1 (AUT) button to automatically operate room thermostat. The heater works in Heating mode following the schedule set in CH scheduler. Se below in this Manual for more details. When AUT heating mode is enabled, the scheduler bar is active on the LCD. When this bar is active, you can force room temperature value using K+ or K- keys. During this operation the set room temperature is displayed (above ROOM T). Choose one of the available values. A hand is displayed to indicate that you are manually changing a parameter. The first time you change the schedule, the CH mode is automatically restored for the remote control. CH - ON Heating mode Press K2 (ON) to set permanent and manual operation of room thermostat. Heater operation in heating mode depends on selected room temperature. The display shows the room temperature value required (ROOM T). When it is flashing, you can change the parameter by pressing K+ or K- keys. You can choose the value within the range of accepted room temperatures. Once parameter selection has timed out, standard operation menu is restored on the LCD. However, you can always force room temperature by choosing a value from the list using K+ or K- buttons. When ON heating mode is enabled, the scheduler bar on the LCD is disabled. Page 17 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

18 chronothermostat) In order to ease following programming operations, we suggest setting room temperature as follows: -T1 min. room temperature with antifreeze feature 7 C -T2 low room temperature T3 comfortable room temperature Press KM, K4 >>, and K2 (SET) keys to access the setting menu for required room temperature. Menu selection is indicated by the display of the following string: << Room Temp T1 >> T1 value is displayed. Use K+ and K- keys to change this value, then press K4 to switch to T2 and T3. The messages displayed when pressing K4 again do not affect heater operation. Values for T1, T2, and T3 parameters should range from +7 C to 35? (44 F to 95 F). How to Program CH scheduler Press KM, then K4 (>>) keys to open Page 2 of the menu. Use the K1 (PRG) key to select Program menu. Once the menu is open, choose one of the following: DAY SET COP PRE There are two ways to create a schedule: - Create a new schedule using DAY, SET and COP keys - Select a default schedule using PRE key. These schedules are not cancelled if a power failure longer than 5 hours occurs. When power is restored, you will only need to set current day and time and choose AUT operating mode. Since ONEPLUS heaters are generally installed in industrial environments, only two operating temperatures are set: a startup temperature T3 (work hours temperature) and a turn off temperature (either lower T2 temperature or T1 antifreeze temperature). By pressing K3 (COP) key, you can copy the schedule into the following day. Navigate to the day to be copied (MO, for instance), press COP button, then DAY to paste the schedule into next day (TU, in this case). Repeat this step to keep copying the same schedule throughout the week. Obviously, you can change copied schedule using previously described procedure. When finished, restore standard operation by pressing KM. Standard operation is automatically restored 2 minutes after last input. Default Schedules Press K4 (PRE) to open the menu for selecting default schedules for CH scheduler. The chronothermostat allows you to choose one of five different schedules (see paragraph with manufacturer s settings). Once the menu is open, choose one of the following: OK CANCEL Press K+ or K- to select default schedule for CH scheduler. Schedules are named from 1 to 5. Press K1 (OK) to confirm your choice. The main menu is displayed again in CH scheduling mode. Use K2 (CANCEL) to exit without selecting. The main menu is displayed again in CH scheduling mode. New Schedule Press K1 (THU) button to select the day of the week to set. Press K2 (SET) button to open temperature menu and choose to temperature you want to set for the period of time defined. Use K+ and K- buttons to set the heater s timetable. After pressing K2 button, choose one of the following: T1 T2 T3 K2 K3 K4 T1 Sets corresponding room temperature T2 Sets corresponding room temperature T3 Sets corresponding room temperature Press K2 (T1), K3 (T2), or K4 (T3) keys to select the temperature you want to schedule. After the selection, the initial menu is restored. WARNING: When you start programming, parameters T1, T2, and T3 are displayed as flashing dots under the corresponding reference hour. During and after setup, parameters will be displayed as follows: - T1 No graphics - T2 One dot - T3 Two dots one over the other. Therefore, you can use K+, K-, and K2 keys to set turn on and off times and relevant reference temperatures. At the end of setup, graphic signs (one dot, two dots or no sign) on daily schedule bar identify the operating program you have chosen. REMARK: 30 minutes is the minimum period you can set temperature for (T1,T2,T3). Page 18 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

19 4.5 Antifreeze Protection This function is always enabled, even if the chronothermostat is turned off. The unit starts when room temperature falls below default antifreeze threshold value (+ 5 C/+41 F). Contact your Service Centre if you want to disable this protection feature. Backup Power Your chronothermostat is powered directly from the heater but has a backup battery that prevents data losses for as long as 5 hours. If backup power runs out, the LCD goes blank and it will only be restored when power supply is restored. Temperature Display In standard operation, the chronothermostat displays room temperature. Press K+ or K- buttons to read the temperature that was set. 4.6 Room Compensation See paragraph 3.7 for a description of this function. It can be enabled by setting TSP parameters on the chronothermostat. If you want to enable/disable this function, press KM for about 8-10 seconds until the following string is displayed: INFO SET ERR >> Press K4 (>>) to move to the following page. The following strings are displayed: LAN PAR PARC >> Press K3 (PARC) to access TSP parameters. The LCD shows: << PARAMC 1>> in addition to the value set for the parameter. TSP parameters are displayed under PARAMC. Set parameters following the table below: PARAMC TSP VALUE FIELD 11 C A A A Use K1 and K4 buttons to scroll the 21 TSP parameters. Use K+ and K - keys on the chronothermostat to change their values. After parameters have been changed, press KM for 8-10 sec. to exit. 4.7 Summer Ventilation You can run this function either in MANUAL or AUTOMATIC mode. In both cases you have to set TSP A35 parameter (PARAMC 10 on the chronothermostat) to 1. REMARK: In order to change TSP parameter, follow the procedure described for room compensation function. To activate ventilation only, first set DHV parameter to appropriate mode. Please follow the procedure below: Press KM to display Page 1. The following options are available: CH DWH INFO >> Press K4 (>>) key to access Page 2. The following options are available: PRG SET CLK >> Press K2 (SET) key, then K4 (>>) until you reach the following screen: << PROGR DHV >> Use K+ and K - keys to set DHV value to either 1 = Manual running 2 = Automatic running according to the mode you want to set. After changing the parameter, wait a few seconds until the figure flashes. This is a confirmation that the parameter has been set. Press KM to quit. MANUAL MODE To manually operate ventilation, follow the procedure below: Press KM until page 1 is displayed. The following options are available: CH DWH INFO >> Press K2 (DHV) to access the following menu: ON OFF CLK K2 K3 K4 Press K2 (ON) or K3 (OFF) to turn on or off the fans. REMARK: When using K3 (OFF) to turn fans off, the heater also runs post-ventilation for the default period. REMARK: The chronothermostat automatically restores main LCD screen 20 seconds after last input. REMARK: When reading or setting PARAMC 18, remember that its value must be divided by 10. This allows entering decimals, too (example: if you enter 25, the number actually used is 2.5). REMARK: When reading or setting PARAMC 19, remember that its value must be divided by 5. Page 19 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

20 AUTOMATIC MODE A weekly scheduling can be set for running ventilation automatically. The procedure is similar to the one used for setting a heating schedule. To use automatic mode, set to 2 the DHW parameter following the procedure described in the previous page. REMARK: DHW parameter allows the user to set either automatic or manual (ON-OFF) mode. To automatically operate ventilation, follow the procedure below: Press KM to display Page 1. The following options are available: CH DWH INFO >> Press K1 (RIS) key. The following screen will appear: AUT ON OFF CLK Disable heating by pressing K3(OFF). When you release the key, main screen and initial settings are restored. Press again KM to display page 1. The following options are available: CH DWH INFO >> Press K4 (>>) key to access Page 2. The following options are available: PRG SET CLK >> Press K1 (PRG) key. The following screen will appear: CH DWH K1 K2 Press K2 (DHW) key to access selection menu for DHW mode: DAY SET COP PRE This menu allows setting day clock and weekly schedule (DAY). Press KM until page 1 is displayed. The following options are available: CH DWH INFO >> Press K2 (DHW) key. The following screen will appear: AUT ON OFF CLK Press K1 (AUT) key. The initial screen is restored and the automatic mode is enabled. To disable it, follow the procedure below: Press KM until page 1 is displayed. The following options are available: CH DWH INFO >> Press K2 (DHW) key. The following screen will appear: AUT ON OFF CLK Disable automatic ventilation by pressing K3(OFF). REMARK: It is not possible to display the scheduling of this function when automatic ventilation is set (heating off). REMARK: Both in manual and automatic running mode, when ventilation only is enabled, a tap icon is displayed on main screen. REMARK: When using K3 (OFF) to turn fans off, the heater also runs post-ventilation for the default period. REMARK: The only formats allowed for minutes are.00 and.30. No other formats are accepted (ex: but not ). You can choose one of the following settings (K2 -(SET)): 1) - schedule remains unchanged 2) T1 DHW mode disabled 3) T1 DHW mode enabled If you press K1(-), K2(T1), or K3(T2) keys, the required parameter is selected for time setting. Then the menu screen for DHW mode is automatically restored. Use K+ and K - keys to scroll the schedule following the procedure described for heating. You can also copy the schedule of one day into another using K3(COP) key. Press KM to exit the menu and go back to initial settings. After setting the schedule, go through the following steps to enable automatic summer autoventilation: Page 20 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

21 4.8 Working with APEN Remote Control (G15950) Read General and Safety Warnings on page 3. User s operations on the heater are limited to regulating remote control options. REMARK:When NTC2 sensor is enabled (parameter A12=1), the LCD displays the room temperature measured by the sensor. Press the Down arrow key to display delivery air temperature (NTC1). If NTC2 is disabled (parameter A12=0), NTC1 value is displayed on LCD. See table on page 46 for a complete list of parameter values. Heater Operation When heating is required and the burner turns on, the red LED lights up. A heating request causes the unit to start when the following conditions are met: - Remote control is ON (green LED on). Use ON/OFF key to switch on or off the remote control. If the green LED is lit, it means that the heater is regularly running. - If NTC2 room sensor is enabled, the temperature it measures must be lower than the value of ST2 less P2 differential. REMARK: Contact for remote control is wired in series to 7-9 contact. Therefore, in any of the two opens, the burner stops. A timer can be wired to jumpers in order to automatically start up or turn off the heaters according to a schedule. Any of the available jumpers can be used to this purpose. When a jumper opens, the antifreeze feature is triggered if parameter C8 is set to 1. The set point changes from ST2 to ST3 and the green LED flashes. If both jumpers open, the burner turns off and the antifreeze feature, though programmed, is not enabled. Antifreeze Feature In order to enable this feature, set parameter C8 to 1 and set ST3 set point. According to room temperature, the burner will be turned on using the default modulation value set for A13 parameter. Temperature Setting In general, the user shall only set the room temperature he requires using ST2 parameter. The following temperatures can also be set: - ST1 - delivered air, or heater modulation temperature -ST3 - antifreeze temperature of the system. In order to change set points, do the following: - press and hold down PRG key for a few seconds - ST1 will be displayed. - press SEL to confirm. ST1 value will be displayed. - change this value by using arrow keys. - press SEL to confirm. - ST1 reappears on the LCD. Press the Up arrow key to move to ST2. - press SEL if you want to change ST2 and repeat previous steps. Repeat same procedure for ST3. Press PRG again to exit change menu. UNLOCKING Possible working failures are displayed on remote control LCD using the relevant coding. The code starts with an F (for fault) followed by the number of fault type. Failures detected and logged by the modulation card and remote control installed in the system are those listed on pages 10 and 14. An additional failure for remote control is reported as ERR An err message on the LCD means that wires 3 and 4 have been mistaken when connecting remote control and modulation card. It can also indicate communication failure between card and control. To unlock the unit, press simultaneously for 3 seconds at least both arrow keys. REMARK: Wait at least 20 seconds after turning the heater off before trying and resetting it. WARNING: Besides storing all possible alarm conditions (F1 to F8), the modulation card runs a further partial count of F1 and F2 errors: after 5 manual reset attempts, the microprocessor itself must be reset in order to continue. To reset the microprocessor you can: use the switch on the card [UNLOCK], or power the card off and then on. A fault is displayed Press simultaneously to unlock green light: the unit is on red light: the burner is on yellow light: not used Page 21 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

22 4.9 Basic Accessories of the Heater Intake pipe joint P This joint is a piece of pipe made of galvanized sheet that can be used to join intake assembly to delivery assembly. It s use is mandatory for the installation of other intake accessories. This joint comes with the unit for delivery assembly. Heater Code B H P mm mm mm G G G G Vibration damping joint When correctly assembled on intake or delivery assemblies, vibration damping joint reduces vibrations on air delivery pipes, thus avoiding their propagation and consequent noise. These joints are made of neoprene and metal and have a galvanized steel framework. They can endure temperatures of 100 C max. and their fire rating is M2. P Heater Code B H P mm mm mm G G G G Fireproof dampers P Supplied fireproof dampers are REI120 CERTIFIED. External panelling is made with 15/10 mm thick galvanized steel. Dampers include a 48 mm thick plasterboard shutter, a lever for manual reset, a fuse set to 72 C, a thermal cut-out and a position microswitch. Fire resistance is REI120. In order to ensure proper movement of the shutter, a piece of free pipe must be provided before and after the damper. Heater Code B H P mm mm mm G G G G Page 22 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

23 Rain Deflector Grid The protection grid provided is made of galvanised steel and includes a bird protection net. It can be installed directly on control damper. Use suction sleeve to install it on return air unit. P Heater Code B H P mm mm mm G G G G Control damper and servocontrols Dampers are made of galvanised steel and move in opposite directions by means of levers. Ø 12 driving shaft protrudes by 100 mm. Use suction sleeve to install damper on return air unit. In addition to dampers, manual controls and/or servomotors can be supplied for motor-assisted control. Servomotors can be of two types: on-off or modulating. P Heater Code B H P mm mm mm G G G G Code Description Tutti i m odelli G09901 Manual control Tutti i m odelli G01162 ON/OFF s ervom otor Tutti i m odelli G02568 Control for ON/OFF s ervom otor Tutti i m odelli G01112 Modulation s ervom otor Tutti i m odelli G17745 Pos itioner for m odulation s ervom otor APEN GROUP S.p.A. recommend installing a control damper on air intake in order to adjust air flow rate of the unit after installing and connecting it to the piping system. Page 23 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

24 Accessories for indoor heater Sleeve on suction Fireproof Damper FREE AIR INTAKE FROM THE ROOM DUCTED AIR INTAKE Fireproof Damper* Vibration damping joint Servomotor for dampers Vibration damping joint Fireproof Damper* Accessories for outdoor heater Sleeve on suction Fireproof Damper Rain deflector Grid FREE AIR INTAKE FROM OUTDOOR DUCTED AIR INTAKE Fireproof Damper* Vibration damping joint Servomotor for dampers Vibration damping joint Fireproof Damper* (*) mandatory if required by laws and regulations existing in the installation country Page 24 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

25 4.10 Mixing Box and filters Mixing Box and filters supplied include a galvanised sheet support already assembled on heater intake. Filters can be re-generated by cleaning them as follows: - Dry dust: scroll, suck or blow with compressed air the filter, or wash it with an air jet. - Greasy dust: plunge the filter in lukewarm water and mild detergent (do not brush nor twist filter pads). Replace filters after third cleaning. To clean the filter, remove mixing box side panel by unscrewing the four screws and extract filter as shown. Before this operation, make sure the heater is powered off and disconnected from mains. Mixing box is formed by a self-supporting panelling made of painted steel sheet assembled to galvanised steel sheet base. By using a Mixing box, you can have access to two out of three available openings (back, bottom, and top). Unused openings can be sealed by means of gasketed covers. On used openings, you can install ducts or the fittings described below. Supplied filters are made of modacrylic fibre. Their fire resistance rating is M1, while the efficiency rating is G3 (EU3) or G4 (EU4), and they can be used for continuous operation up to 80 C. Matching a Heater to a Mixing Box GENERATORE MIXING BOX con filtri G3 p (Pa) MIXING BOX con filtri G4 024/032/035 MX010-G MX010-G MX030-G MX030-G4000 p (Pa) MX040-G MX040-G MX050-G MX050-G Filter loss ( P) is referred to a clean filter. Deduct this loss from heater static pressure. A dirty filter can reach a loss of 400 Pa, thus compromising heater efficiency. We recommend installing a pressure regulator to turn heater off when set value is exceeded. Page 25 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

26 MIXING BOX ACCESSORIES: Based on installation requirements, mixing box can integrate different accessories. Cover If the heater is installed outdoor and you do not use top opening of mixing box, a cover must be installed to protect the unit and its filters from weather. The cover is already assembled on mixing box at delivery. Fireproof Damper Mixing box MX010 MX030 MX040 MX050 Roof Code G11911 G11931 G11941 G11951 Mixing box Code B H P mm mm mm MX010 G MX030 G MX040 G MX050 G P Vibration damping joint P Damper Mixing box Code B H P Rain Deflector Grid mm mm mm MX010 G MX030 G MX040 G MX050 G P Mixing box Code B H P mm mm mm MX010 G MX030 G MX040 G MX050 G P Mixing box Code B H P mm mm mm MX010 G MX030 G MX040 G MX050 G Page 26 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

27 Accessories for indoor heater Fireproof Damper FREE AIR INTAKE FROM THE ROOM Accessories for outdoor heater Servomotor for dampers Fireproof Damper Vibration damping joint DUCTED AIR INTAKE Cover Fireproof Damper Rain Deflector Grid FREE AIR INTAKE FROM OUTDOOR Servomotor for dampers Fireproof Damper DUCTED AIR INTAKE Vibration damping joint The rain deflector grid, the vibration damping joint, the fireproof damper and the control damper are fastened directly to the nuts on the mixing box (using M8 supplied). APEN GROUP S.p.A. recommend installing a control damper on air intake in order to adjust air flow rate of the unit after installing and connecting it to the piping system. Page 27 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

28 Mixing Box dimensions: BACK VIEW SIDE VIEW LV BM // H // UPPER VIEW /// /// Ø M8 F DIMENSIONS OPENING HEATER LV BM H F Section MX x MX x MX x MX x 310 Page 28 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

29 4.3 Cooling Unit ONEPLUS heaters can also be matched to a cooling unit, supplied as an option, that is installed on heater delivery. Cooling Units, as well as mixing boxes, include a galvanised steel base and will be pre-assembled on heaters (see figure). Cooling unit framework is built with 25-mm-thick, self-supporting, layered panelling. Outer side of the panelling is made of varnished steel sheet, while the inner sheet is galvanised. Isolation is provided with glass wool. A stainless steel tray and a drain hose are also provided for condensate drain. 480 Two types of cooling units are available: CSW-series units includes a water-chilled coils while CSR-series units include R407C-chilled coils. Proper operation of the system requires the installation of a chiller for cold water production on CSW units and of a motor-driven condensing unit on CSR units. All CSR series coils have six ranks, are equipped with thermostatic valve and can operate with one or two circuits, according with cooling capacity. On the contrary, CSW series coils have eight ranks (030, 040, and 050 models) and six ranks (010 model). For Cooling Units, as well as for Mixing Boxes, the cover accessory must be ordered and mounted when the heater is installed outdoor. The coil can be inspected form the same side where heater inspection lid is provided. Remove front lid to inspect the coil, if necessary. For CSR series, thermostatic valves are visible inside accessible compartment (see figure). HEATER EXPANSION COIL WATER COIL Cover 024/032/035 CSR010 CSW010 G CSR030 CSW030 G CSR040 CSW040 G CSR050 CSW050 G11951 Technical data: TE C H N IC AL D ATA D ire ct e xp a n s io n co il C S R * W a te r co il C S W * * (*) values calculated with R407c refrigerant, evaporation temperature 7 C and condensation temperature 45 C. Inlet air at 27 C with 50% of r.h. (**) values calculated with input water temperature of 7 C and output water temperature of 12 C. Inlet air at 27 C with 50% r. h. Page 29 U.M. k W circu it N o. A ir p (P a ) k W A ir p (P a ) code HG GB ed A-0907 rev ,6 4 1,7 5 6,0 7 5, ,4 4 0,6 5 4,6 7 6, APEN GROUP reserves the right to change products and documents as required.

30 5. APPROVAL CERTIFICATE Page 30 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.

31 Page 31 code HG GB ed A-0907 rev.09 APEN GROUP reserves the right to change products and documents as required.