Zeta Rev LN HP 10.2 Configured unit accessories 1PS - One user-side pump with tank LN - Low noise RG - Condensation control with fan speed regulator CSP - Set point compensation depending on external air COTW - Outgoing water temperature control A43N - 400/3+N/50 power supply RMMT - Maximum and minimum voltage relay AG - Rubber vibration dampers The image does not refer to the configured unit General description Air/water unit with hermetic scroll compressors, plate evaporators and axial fans. Cooling fluid: R410A. Version that allows hot or cold to be produced according to requirements on the same heat exchanger thanks to reversal of the refrigerant circuit. Specifications Structure With load-bearing frame and removable panelling lined with sound absorbing expanded polyurethane matting, this is made of galvanized sheet-iron coated with polyester powder at 180 C, which makes it highly resistant to weather conditions. The screws and bolts are stainless steel. 5017/7035 Closed in the compartment and separated from the air flow, the compressors are accessible through a special panel for maintenance operations, even when the unit is on. Page 1 of 7
The compressor compartment of this unit is fully soundproofed with sound absorbing material and soundproofing material. Compressors Hermetic orbiting spiral scroll compressors, connected in parallel, fitted with oil level sight glass, internal klixon thermal overload protection and oil equalization line. Fans Axial fans, designed to optimize efficiency and reduce noise emission, directly coupled to a 6-pole electric motor, and with thermal overload protection (internal klixon). The protection rating of the motor is IP 54. The fan includes a safety guard in conformity with standard UNI EN 294. User-side heat exchanger made of stainless steel AISI 316 insulated with a shell of closed-cell foam material to reduce heat loss. The use of plate heat exchangers allows us to: - Achieve higher COP/EER; - Reduce the amount of refrigerant in the circuit; - Decrease the size and weight of the unit; - Facilitate maintenance work. Each heat exchanger is provided with a temperature probe for freeze protection and a probe for measuring the incoming water. Refrigerant circuit The circuit includes: - charging valve for maintenance - liquid sight glass dehydrator filter thermostatic expansion valve having external pressure equalization - high and low pressure switches safety valve - shut-off valve in the liquid line In addition to what is present in the basic version, the set-up includes: - 4-way reversing valve - fluid accumulator - second thermostatic valve - solenoid valve on the liquid line Electrical control panel The circuit includes: - Main disconnect switch Fuses to protect the power circuits Fuses to protect the auxiliary circuits - Thermal magnetic circuit breakers for pumps (if present) - Compressor contactors - Fan contactors (AC) Pump contactors (if present) Enabling of the microprocessor for summer/winter switching and automatic defrosting Page 2 of 7
to control the following functions - Water temperature control, with inlet control - Freeze protection - Compressor timings - Automatic rotation of compressor starting sequence - Alarm signalling - Alarm reset - Capacity reduction - Cumulative alarm contact for remote signalling - Forcing of capacity reduction due to pressure limit - Alarm log recording with "black box" function - Display of the following on the display: --> Outgoing water temperature --> Incoming water temperature --> Temperature and differential set points --> Description of alarms --> Compressor operation hour meter Standard power supply [V/ph/Hz] 400/3N~/50 from 3.2 to 10.2; 400/3~/50 for size 12.2 CONTROLS AND SAFETY DEVICES All the units are fitted with the following control and safety components: - high pressure switch with manual reset - high pressure safety device with automatic reset, for a limited number of occurrences, managed by the controller - low pressure safety device with automatic reset and limited tripping managed by the controller - high pressure safety valves - antifreeze probe at the outlet of the user-side heat exchangers - differential pressure switch already fitted on the user-side heat exchangers - overtemperature protection for compressors and fans overtemperature protection for compressors and fans - High pressure switch with manual reset for each compressor; - Low pressure switch (with manual reset managed by the control); - High pressure safety valve; - Protection against overtemperature for compressors; - Protection against overtemperature for fans; /1PS with one circulation pump, insulated storage tank suction gate valve Other standard features Remote ON-OFF by digital input Page 3 of 7
This function consists of a remotely operable contact that allows switching on and off of the machine through a signal that can be brought inside the building or controlled by a BMS (Building Management System) Summer/winter selection by digital input Fitted as standard on all heat pumps. When the unit is switched on, it is always necessary to set an operating mode (heat pump or chiller). This remotely operable contact can be used to change the operating mode even from inside the building and without it being necessary to directly access the microprocessor control. CONFIGURED UNIT ACCESSORIES DESCRIPTION Saturation pressure control with fan Fan speed regulator The microprocessor control of the unit considers all the operating parameters and carries out continuous fan speed control through a Fan speed regulator, in order to optimize the operating conditions and efficiency of the unit. This control also has the effect of reducing the noise level of the unit; in fact, the typical conditions under which the control will be modulating the speed of the fans are those of the night, spring and autumn. This ensures that, whenever there is a chance, the machine will reduce the speed of the fans, and therefore the noise of the machine, to the minimum. Set point compensation depending on external air temperature The microprocessor control of the unit can dynamically carry out a compensation of the set point as the external air temperature changes. The compensation can be positive or negative: with positive compensation, as the external air temperature rises, the operating set point temperature also rises, whereas with negative compensation, as the air temperature rises, the set point temperature falls. The compensation can be made on the summer set point and on the winter set point (heat pumps). Both summer and winter negative compensation is set by default, but this setting can be changed from the keyboard of the microprocessor. Unless otherwise specified, the default values are those indicated in the graphs below. Set point compensation depending on external air temperature The microprocessor control of the unit can dynamically carry out a compensation of the set point as the external air temperature changes. The compensation can be positive or negative: with positive compensation, as the external air temperature rises, the operating set point temperature also rises, whereas with negative compensation, as the air temperature rises, the set point temperature falls. The compensation can be made on the summer set point and on the winter set point (heat pumps). Both summer and winter negative compensation is set by default, but this setting can be changed from the keyboard of the microprocessor. Unless otherwise specified, the default values are those indicated in the graphs below. User-side outgoing water temperature control The accessory allows you to change the operating logic of the control that normally envisages control on the basis of the return temperature from the system. If selected, this accessory allows you to implement control according to the temperature of the water sent to the system. Installation of this accessory is recommended for units with a high number of compressors (number of compressors 4). Maximum and minimum voltage relay This device carries out continuous control of the supply voltage of the unit and checks that it is always within an allowable range. If the voltage value stabilizes above or below this range, the device will stop the unit to prevent damage to the electric motors. This device will carry out phase sequence control. Rubber anti-vibration mounts These are supplied as a separate package from the unit and must be installed on site following the assembly diagram supplied. They allow you to reduce the vibrations transmitted from the unit to the surface it is standing on. Page 4 of 7
CONFIGURED UNIT TECHNICAL DATA Unit Zeta Rev LN HP Model 10.2 Refrigerant fluid R410A Minimum partialization of the unit % 50 Requested partialization % 100 Compressors Type Scroll Number 2 Refrigerant circuits 1 Total oil charge kg 9.3 Total refrigerant charge (estimated) (NRef) kg 0.0 Fans Type Axial-STD Number 3 Rated absorbed power kw 0.60 Rated absorbed current A 2.62 Heat exchanger - User side Type Plates Number 1 Water content l 4.9 Dimensions Lenght mm 3255 Width mm 1156 Height mm 1788 Weight Net weight kg 1007 (NRef) The indicated refrigerant charge is theoretical and refers to the standard machine without accessories. Hydraulic module - User side Number of pumps 1 Rated absorbed power kw 1.85 Rated absorbed current A 4.5 Maximum pressure hydraulic circuit kpa 600 Storage tank l 450.0 Cooling conditions Fluid - User side Water Fouling factor - User side m² C/W 0.0000176 Inlet water temperature - User side C 12.0 Page 5 of 7
Outlet water temperature - User side C 7.0 External air temperature C 29.0 Height asl m 0 Cooling performances Cooling capacity kw 104.9 Compressors absorbed power kw 32.0 Total absorbed power (A1) kw 35.3 Flow rate - User side l/s 5.00 Pressure drops - User side kpa 54 EER gross (A1) 2.97 Air flow rate m3/h 26000 Available pressure Pa 0 Fans absorbed power kw 0.55 Fans absorbed current A 2.35 Sound levels Sound power (4) db(a) 82 Sound pressure (5) db(a) 50 Hydaulic module - User side: Cooling mode Available pressure kpa 153.31 Hydraulic circuit pressure drops kpa 53.59 Pumps absorbed power kw 1.6 Pumps absorbed current A 4.5 (A1) Compressor, fans and pumps power (4) Sound power levels calculated according to ISO 3744. (5) Sound pressure levels measured at a distance of 10 metres from the unit in free field and directivity factor Q=2 Reference conditions: External air temperature 35 C; user-side heat exchanger inlet-outlet water temperature 12-7 C. Heating conditions Inlet water temperature - User side C 40.0 Outlet water temperature - User side C 45.0 External air temperature C -0.2 External Relative Humidity % 90 Heating performances Heating capacity kw 89.2 Compressors absorbed power kw 30.1 Total absorbed power (A1) kw 33.3 Flow rate - User side l/s 4.32 Pressure drops - User side kpa 40 COP gross (A1) 2.68 Air flow rate m3/h 26000 Available pressure Pa 0 Fans absorbed power kw 0.55 Fans absorbed current A 2.35 Page 6 of 7
Hydaulic module - User side: Heating mode Available pressure kpa 174.75 Hydraulic circuit pressure drops kpa 40.32 Pumps absorbed power kw 1.5 Pumps absorbed current A 4.5 (A1) Compressor, fans and pumps power ELECTRICAL DATA (Theoretical calculations) Power supply V/ph/Hz 400/3N~/50 ±10% Control power supply V/ph/Hz 230-24/1~/50 Electrical performances Maximum absorbed power (E1) kw 53.45 Maximum starting current - LRA A 273.5 Full load current - FLA A 85.4 (E1) Mains power supply to allow unit operation Technical calculations may change according to calculation methods. Techical data may be revised. Conformity Ecodesign SOUND LEVEL Sound Level 63 [Hz] 125 [Hz] 250 [Hz] 500 [Hz] 1000 [Hz] 2000 [Hz] 4000 [Hz] 8000 [Hz] Lw [db] 78 76 75 75 75 79 71 62 Lw_tot db(a) 82 Lp [db] 46 44 43 43 43 47 39 30 Lp_tot db(a) 50 Reference conditions: External air temperature 35 C; user-side heat exchanger inlet-outlet water temperature 12-7 C. Operation at rated speed with no fixture units. Lw: Sound power levels calculated according to ISO 3744. In particular Lw_tot is the only binding value. Lp and Lp_tot: Sound pressure levels measured at a distance of 10 metres from the unit in free field and directivity factor Q=2. Non binding values obtained from the sound power level Page 7 of 7