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Immergas Magis M 4 EH3 Use And Installation

Immergas Magis M 4 EH3 Use And Installation

Block heat pumps with integrated backup heater
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MAGIS
Instructions and recommendations
IE
M4-6-8 EH3
M12-14-16 T EH9
Block heat pumps with integrated
backup heater
Use and Installation

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Summary of Contents for Immergas Magis M 4 EH3

  • Page 1 MAGIS Instructions and recommendations M4-6-8 EH3 M12-14-16 T EH9 Block heat pumps with integrated backup heater Use and Installation...

  • Page 2: Table Of Contents

    INDEX Dear Customer ..........................................4 List of abbreviations used ......................................5 General Recommendations .....................................6 Safety symbols used ........................................7 Personal protective equipment ....................................7 Introduction ..........................................8 General safety warnings................................10 General Introduction................................13 Accessories....................................15 Accessories supplied with the units 4-16 kw..............................15 Prior to installation.
  • Page 3 13.1 General guidelines......................................108 13.2 General symptoms.....................................108 13.3 Operation parameters....................................111 13.4 Error codes........................................112 Technical specifications................................ 120 14.1 General........................................120 14.2 Electrical technical specifications................................120 Information on maintenance..............................121 15.1 Attachments ....................................... 124...

  • Page 4: Dear Customer

    Dear Customer Congratulations for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Im- mergas customer you can also count on a Qualified Authorised After-Sales Technical Assistance Centre, prepared and updated to guarantee constant efficiency of your appliance.

  • Page 5: List Of Abbreviations Used

    LIST OF ABBREVIATIONS USED The following is the key of the abbreviations used in this document. Domestic hot water Carbon dioxide Fan coil Domestic hot water etc. Etc. Fan coil Fig. Figure Floor heating circuit Backup heater Maximum fuse amp. Maximum overcurrent protection Max.

  • Page 6: General Recommendations

    Law. • Improper installation or assembly of the Immergas device and/or components, accessories, kits and devices can cause unex- pected problems for people, animals and objects. Read the instructions provided with the product carefully to ensure proper installation.

  • Page 7: Safety Symbols Used

    SAFETY SYMBOLS USED GENERIC HAZARD Strictly follow all of the indications next to the pictogram. Failure to follow the indications can generate hazard situations resulting in possible harm to the health of the operator and user in general, and/or property damage. ELECTRICAL HAZARD Strictly follow all of the indications next to the pictogram.

  • Page 8: Introduction

    INTRODUCTION Magis M 4/6 EH3 Magis M 8 EH3 Magis M 12/14/16 T EH9 Internal arrangement: Magis M12-14-16 T EH9 Key (Fig. 3): - Electric control system Key (Fig. 4): - Terminal board - Magis M4/6 EH3 - Hydraulic system - Magis M8 EH3 - Refrigerant system Magis M12/14/16 T EH9...
  • Page 9 The images in this manual are only used as a reference - refer to the actual product. • The maximum length of the wiring that guarantees communication between the heat pump and the control panel is 50 m. • The power cables and communication wires are laid separately and cannot be placed in the same duct. Otherwise there would be electromagnetic interference.

  • Page 10: General Safety Warnings

    GENERAL SAFETY WARNINGS. The precautions listed below are divided into the following types. They are rather important and therefore must be followed carefully. Meaning of DANGER, WARNING, CAUTION and NOTE symbols. • Improper installation of the appliances or accessories can cause electric shocks, short-circuits, leaks, fire or other damage to the equipment.
  • Page 11 • Tear up plastic packaging bags and throw them away so that children do not play with them. Children can risk dying by suffocation if they play with plastic bags. • Safely dispose of packaging materials such as nails or other metal or wooden parts which could cause injury.
  • Page 12 • Do not install the unit in the following places: - Where there is mineral oil mist, oil spray or vapours. The plastic components could deteriorate and cause detachment or leakage of water. - Where corrosive gases are produced (such as sulphurous acid gas). Where the corrosion of copper pipes or welded parts can lead to refrigerant leaks.

  • Page 13: General Introduction

    GENERAL INTRODUCTION. - Magis M4-6-8 EH3 and Magis M12-14-16 EH9 block heat pumps are used both for heating and cooling applications and for domestic hot water tanks. They can be coupled with fan coils, floor heating applications, low-temperature high-efficiency radiators, domestic hot water tanks and solar kits.
  • Page 14 Solar control unit (optional) A solar control unit can be connected to the unit for the production of domestic hot water with thermal solar system, with relative coil inside the storage tank. The unit has a freezing prevention function using the heat pump or the backup heater to keep the water system safe from freezing in all conditions.

  • Page 15: Accessories

    ACCESSORIES. ACCESSORIES SUPPLIED WITH THE UNITS 4-16 KW. Accessories supplied with the units Name Shape Quantity Name Shape Quantity Temperature probe for domestic hot water Use and maintenance manual (T5) or zone 2 (Tw2) or thermostat controlled storage tank (Tbt1) Control Panel manual Drain pipe Technical data manual...

  • Page 16: Prior To Installation

    PRIOR TO INSTALLATION. Prior to installation. Make sure to confirm the model name and serial number of the unit. Handling. Due to the relatively large size and heavy weight of the unit, it must only be handled with lifting equipment with harnessing. The harness- es can be fitted in the sleeves on the base frame, specifically made for this purpose.

  • Page 17: Important Information On The Refrigerant

    IMPORTANT INFORMATION ON THE REFRIGERANT. This product contains fluorinated gas whose release into the air is prohibited. Type of refrigerant: R32; Volume of GWP: 675. GWP = Global Warning Potential Model Volume of refrigerant loaded in the unit at the factory Refrigerant (kg) Tonnes of CO2 equivalent 4 kW...

  • Page 18: Installation Site

    INSTALLATION SITE. • The unit is supplied with flammable refrigerant and must be installed in a properly ventilat- ed place. If the appliance is installed indoors, an additional refrigerant detection device must be added in addition to a further ventilation appliance pursuant to standard EN378. Make sure to take adequate measures so that the unit is not used to house small animals.
  • Page 19 If there is strong wind and its direction can be foreseen, refer to the figures below for installation of the unit (any of them will do). Turn the outlet side of the air towards the wall of the building, fence or screen. Unit 4-6 kW ≥...

  • Page 20: Selection Of A Cold Weather Location

    SELECTION OF A COLD WEATHER LOCATION. See Chap. 4, paragraph “Handling.“. When the unit is used in cold climates, make sure to follow the instructions below. - To avoid exposure to wind, install the unit with the intake side facing the wall. - Never install the unit in a place where the intake side can be directly exposed to the wind.

  • Page 21: Installation Precautions

    INSTALLATION PRECAUTIONS. DIMENSIONS. Models 4-6 kW Models 8-16 kW 1-1/4” 1” Model 4-6 kW 1295 mm 375 mm 429 mm 120 mm 640 mm 380 mm 105 mm 225 mm 712 mm 81 mm 8-16 kW 1385 mm 460 mm 526 mm 192 mm 656 mm...

  • Page 22: Installation Requirements

    INSTALLATION REQUIREMENTS. - Check the strength and level of the ground where the unit is installed so that it does not vibrate or make noise during operation. - Securely fasten the appliance with the foundation bolts, following the foundation drawing shown in the figure (prepare six Ø10 ex- pansion bolts, nuts and washers easily found in the market).

  • Page 23: Clearance Requirements For Maintenance

    CLEARANCE REQUIREMENTS FOR MAINTENANCE. Models 4-16 kW. - In case of stacked installation. 1. If there are obstacles obstructing the outlet side. ≥500mm ≥200mm Unit 4-6 kW ≥ 300 mm 8-16 kW ≥ 300 mm 2. If there are obstacles obstructing the air inlet. ≥500mm ≥200mm ≥300mm...
  • Page 24 - For assembly in several rows (on roofs, etc.). In case of installation of several units in rows side-by-side. Unit 4-6 kW ≥ 2500 mm ≥ 1000 mm ≥ 300 mm ≥ 600 mm 8-16 kW ≥ 3000 mm ≥ 1500 mm...

  • Page 25: Control Panel Installation Manual

    CONTROL PANEL INSTALLATION MANUAL. Safety precautions. - Read the safety precautions carefully before installing the unit. - It is recommended to strictly abide by the important safety tips given below. - Make sure that nothing anomalous occurs during execution of the test and completion of installation, then deliver the manual to the user.
  • Page 26 • Notes for installation of the control panel. 1. This installation manual contains information on how to install the control panel. 2. The control panel is a low-voltage circuit. Never connect it to a normal 220V/380V circuit, or insert it in the same conduit as the circuit wiring.
  • Page 27 • Installation of rear cover. Key (Fig. 30 - 31): - Screw hole for three M4X20 - Screw hole on junction box 86, use two M4X25mm - Closing position - Wires - Rear cover - Flat-headed screwdriver - Front cover 1.
  • Page 28 60mm Key (Fig. 32 - 33): - Lower left side wires outlet hole slit - Wiring hole - Junction box - Wall hole and wiring hole. Diameter: Ø8 - Ø10 - Stucco - Folded cable To prevent water from penetrating into the control panel, use anchoring and stucco to seal the passage holes when installing the wires.
  • Page 29 Installation of front cover. After having positioned the front cover, close it without blocking the wire during installation. Key (Fig. 34): - The sensor must be sheltered from humidity Install the rear cover correctly and firmly close the front and rear covers; otherwise the front cover will fall off.

  • Page 30: Typical Application Examples

    TYPICAL APPLICATION EXAMPLES. The following application examples are for illustrative purposes only for units 4-16 kW. UNITS 4-16 KW: APPLICATION 1. FHL1 FHL2 FHLn 11.2 Modbus 11.1 11.3 Pos. Assembly unit Pos. Assembly unit Main unit 11.1 TBH: Domestic hot water storage tank backup heater Control panel 11.2 Coil 1, of DHW storage tank...
  • Page 31 • TBH check (tank booster heater). The TBH function is set on the control panel (Chap. 10.1 “Overview of DIP switch settings.“). 1) When the TBH is enabled, TBH can be activated by means of the "FAST DHW" function on the control panel; in DHW mode, TBH will be activated automatically when the initial temperature T5 of the domestic hot water is too low or when the target temperature of the domestic hot water is too high at low room temperature.

  • Page 32: Units 4-16 Kw: Application 2

    UNITS 4-16 KW: APPLICATION 2. The "ROOM THERMOSTAT" control for space heating or cooling can be set on the control panel. It can be set in three modes: "MODE SET"/"ONE ZONE"/"DOUBLE ZONE". The unit can be connected to a high-voltage room thermostat and to a low-voltage room thermo- stat.
  • Page 33 Mode setting control. FCU1 FCU2 FCUn FHL1 FHL2 FHLn Pos. Assembly unit Pos. Assembly unit Main unit Discharge valve Control panel Manifold/distributor Inertial storage tank Bypass valve Automatic air purge valve SV2: Summer/Winter 3-way valve Discharge valve Room thermostat P_o: Zone 1 circulation pump Floor heating circuit 1...
  • Page 34 Double zone control. RAD.1 S20-2 RAD.2 S20-1 RAD.n 23.1 ZONA2 23.2 Modbus FHL1 FHL2 FHLn Pos. Assembly unit Pos. Assembly unit Main unit Manifold/distributor Control panel 23.1 SV3: Zone 2 mixing valve Inertial storage tank 23.2 P_c: Zone 2 circulation pump Automatic air purge valve S20-1 Zone 1 Room thermostat...
  • Page 35 • Circulation pumps operation. When Zone 1 is ON, P_o starts to run; when Zone 1 is OFF, P_o stops. When Zone 2 is ON, SV3 alternates between ON and OFF according to the set Tw2, P_c remains ON; when Zone 2 is OFF, SV3 is OFF, P_c stops.

  • Page 36: Units 4-16 Kw: Cascade System

    8.3 UNITS 4-16 KW: CASCADE SYSTEM. Pos. Assembly unit Pos. Assembly unit Master Unit 11.1 TBH: Heater of DHW storage tank 1.2... n Slave Unit 11.2 DHW storage tank coil 1 Control panel 11.3 Coil 2 of DHW storage tank for thermal solar system Sv1: 3-way valve for DHW tank Filter (accessory) Inertial storage tank...
  • Page 37 • Domestic hot water heating. Only the master unit (1.1) can function in "DHW MODE". T5S is set on the control panel (2). In DHW mode, SV1 (3) remains ON. When the master unit runs in DHW mode, the slave units can operate in space cooling/heating mode. •...

  • Page 38: Overview Of The Unit

    OVERVIEW OF THE UNIT. DISASSEMBLING THE UNIT. Models 4-16 kW. 4/6 kW 8/12/14/16 kW Key (Fig. 41): Key (Fig. 42): Port 1 - To access the compressor, the electric parts and the hydraulic Port 1 - To access the compressor and the electric components. compartment.

  • Page 39: Main Components

    MAIN COMPONENTS. Hydraulic module 4-6 kW and 8-16 kW. 4/6 kW 8-16 kW Pos. Assembly unit Description The residual air in the water circuit will be removed automatically Automatic air purge valve from the water circuit. Provides additional heating capacity when the heat pump’s heating Backup heater capacity is insufficient due to very low outdoor temperature.

  • Page 40: Electronic Control Box

    ELECTRONIC CONTROL BOX. Models 4-6 kW. Key (Fig. 45): - Control board of Inverter module (PCB A) - Main control board of system with heat pump (PCB B) - Main control board of hydraulic module 8 kW model. Key (Fig. 46): - Control board of Inverter module (PCB A) - Main control board of system with heat pump (PCB B) - Main control board of hydraulic module...
  • Page 41 Three-phase models 12-14-16 kW. Key (Fig. 47): - Control board of Inverter module (PCB A) - Main control board of system with heat pump (PCB B) - Main control board of hydraulic module - Filter board (PCB C)(on the back of PCB B, only for three-phase unit)
  • Page 42 Main control panel of hydraulic module. CN24 CN21 CN28 CN16 CN32 CN13 CN15 CN29 CN18 CN25 CN42 CN40 DIS1 CN31 CN41 CN22 CN35 CN36 CN17 25 26 27 14 15 CN11 CN30 Port Code Assembly unit CN21 HEAT Power supply port Not used DIS1 Digital display...
  • Page 43 Port Code Assembly unit CN13 Port for domestic hot water temperature sensor CN15 Port for zone 2 flow temperature sensor CN18 solarT Port for solar collector lower temperature sensor CN17 POMPA_BP Port for variable speed pump communication Room thermostat control port (heating mode) CN31 Room thermostat power supply port Room thermostat control port (cooling mode)
  • Page 44 Single phase for 4-8 kW units. PCB A, 4-8 kW, Inverter Module For 4-6 kW, two capacitors CN20 Pos. Assembly unit Pos. Assembly unit U compressor connection port Reserved (CN302) V compressor connection port Port for communication with PCB B (CN32) W compressor connection port Input port N for rectifier jumper (CN502) Output port for +12V/9V (CN20)
  • Page 45 PCB B, main control board of heat pump system CN10 CN27 CN11 CN22 CN24 CN17 CN26 CN28 CN13 CN55 CN18 CN14 CN29 CN7 CN5 CN6 CN16 CN19 CN21 CN33 CN2 CN30 CN36 CN37 CN38 CN20 26 25 24 Pos. Assembly unit Pos.
  • Page 46 Three phase for units 12-14-16 kW. PCB A, Inverter Module CN16 CN22 CN15 CN23 CN17 CN18 CN20 CN19 Pos. Assembly unit Pos. Assembly unit Output port for +15V (CN20) L1 power supply input port (CN16) W compressor connection port (CN19) P_in input port for IPM module (CN1) V compressor connection port (CN18) Port for communication with PCB B (CN8)
  • Page 47 PCB B, main control board of heat pump system CN41 CN26 CN24 CN36 CN21 CN18 CN31 CN29 CN10 CN35 CN11 CN28 CN20 CN37 CN27 V i n CN22 CN30 CN38 CN53 CN109 Pos. Assembly unit Pos. Assembly unit Port for earth cable (CN38) Port for Tp temperature sensor (CN8) Port for external room temperature sensor and condenser Port for 2-way valve 6 (CN27)
  • Page 48 PCB C, Three-phase filter board 12/14/16 kW CN204 CN205 CN206 CN30 CN213 CN214 CN202 CN211 CN203 CN200 CN201 CN212 Pos. Assembly unit Pos. Assembly unit L2 power supply (CN201) Port for communication with PCB B (CN8) L3 power supply (CN200) L3 filtering power (L3) N power supply (CN203) L2 filtering power (L2)
  • Page 49 Control components for the backup heater (IBH) 4/6kW single-phase with backup heater (3kW single-phase) 12-16kW three-phase with backup heater (9kW) 8kW single-phase with backup heater (3kW single-phase) Pos. Assembly unit Pos. Assembly unit Automatic thermal protection KM2 backup heater contactor Manual thermal protection KM3 backup heater contactor KM1 backup heater contactor...
  • Page 50 CN20 CN19 CN28 W(C) CN24 CN21 PUMP V(S) CN16 CN32 IBH0 U(R) CN13 HEAT5 CN29 CN15 CN501 CN502 Heat belt CN18 CN42 HEAT6 Heat belt HEAT7 CN40 Heat belt HEAT8 CN41 Heat belt CN27 IBH1 N-OUT IBH2 CN28 DEBUG Temperture CN17 CN26 12/9V...
  • Page 51 3 kW IBH (1 step control) (4-8 kW unit) CN22 CN32 Key (Fig. 58): Colour code key (Fig. 58): - To the hydraulic module main control board - Black - To the heat pump system main control board - Blue - 220-240 Vac power supply - Brown - Yellow/Green...
  • Page 52 CN16 H-SEN CN26 CN15 CN55 CN19 CN24 CN4 CN6 CN32 POWER ON/OFF H-SEN L-SEN CN41 CN17 O-COMP POWER-I CN36 CN18 CN21 DSP1 CN32 CN20 CN19 CN18 IBH0 Heat belt 1 2 3 1 2 3 CN33 Heat belt HEAT1 HEAT1 CN34 To the heating ADDRESS...
  • Page 53 9 kW IBH (3 step control) (12-16 kW T unit) CN22 CN32 Key (Fig. 60): Colour code key (Fig. 60): - To the hydraulic module main control board - Black - To the filter board - Blue - 380-4150 3N~ power supply - Brown - S1 switches settings - Yellow/Green...

  • Page 54: Water Pipes

    WATER PIPES. All the lengths and distances from the pipes have been taken into consideration. Requirements The maximum admissible length of the cable of the temperature probe is 20 m. This is the maximum admissible distance be- tween the domestic hot water storage tank and the unit (only for installations with domestic hot water storage tank). The cable of the probe supplied with the domestic hot water storage tank is 10 m long.
  • Page 55 Water volume and dimensioning of the expansion vessels. • Models 4-16kW. The units are equipped with an 8L expansion vessel with a default pre-pressure of 1 bar. The pre-pressure of the expansion vessel might need to be adjusted to guarantee proper operation of the unit. 1) Check that the total water volume of the system always available and not shut off, excluding the internal water volume of the unit, is at least 40L.
  • Page 56 Water circuit connection. The water connections must be performed properly according to the labels applied on the heat pump, indicating water inlet and outlet. Be careful not to deform the unit’s pipes by exerting excessive force when connecting the pipes. Pipe deformations can cause the unit to malfunction.
  • Page 57 Anti-freeze protection of water circuit. All the internal hydronic parts are insulated to reduce thermal dispersion. Insulation must also be added to the pipes on the field. The software has special functions that use the heat pump to protect the entire system from freezing. When the water flow temperature in the system drops below a certain value, the unit heats the water with the heat pump.

  • Page 58: Filling With Water

    FILLING WITH WATER. - Connect the water feed to the filling valve and open the valve. - Make sure that the automatic air purge valve is open (at least 2 turns). - Fill with water at a pressure of approximately 2.0 bar. Remove as much air in the circuit as possible by using the air purge valves. Key (Fig.

  • Page 59: Wiring On Field

    WIRING ON FIELD. A main switch or another disconnection device, with separation of contacts in all poles, must be incorporated in the fixed wiring in compliance with local laws and standards. Switch of power before performing any connection. Only use copper cables. Never clamp the cables in bundles and make sure they do not come into contact with pipes and sharp corners.
  • Page 60 Wiring overview. • Models 4-16kW. The illustration below provides an overview of the field wiring required between the different parts of the system. AHS1 AHS2 1AUS 2AUS DFT2 DFT1 IBH1 3AUS CN11 CN30 Innen Pos. Assembly unit Pos. Assembly unit Heat pump SV2: Summer/Winter 3-way valve Solar collector...
  • Page 61 Number of conductors Maximum operating Pos. Description AC/DC required current Signal cable for thermal solar station activation 200 mA Control panel cable 200 mA Room thermostat cable 200 mA (a) Solar pump control cable 200 mA (a) Zone 1 circulation pump control cable 200 mA (a) DHW circulation pump control cable 200 mA (a)
  • Page 62 Precautions for electric power wiring. When connecting the power terminal, use the ring cable lug with insulation enclosure (See Figure 69). Use a power cable compliant with specifications and firmly connect the power cable. Make sure the cable is firmly secured so that it is not yanked off by an outside force.
  • Page 63 Remove the cover of the main compartment. Unit 4 kW 6 kW 8 kW 12 kW T 14 kW T 16 kW T Maximum overcurrent protection (MOP) Maximum fuse amp.(A) (MFA) Cable dimension (mm L3 N The earth leakage circuit breaker must be high-speed type A - 30 mA (<0.1 s). The declared values are the maximum values (cf.
  • Page 64 Connection of power cable of the cascade system. • Connection diagram of the electric control system of the cascade system (1N~) H1 H2 H1 H2 H1 H2 ..Key (Fig. 73): - Master Unit - Slave 1 unit Master Unit - Slave 2 unit - Slave X unit Slave unit...
  • Page 65 • Connection diagram of the electric control system of the cascade system (3N~) L1 L2 L3 N L1 L2 L3 N L1 L2 L3 N L1 L2 L3 N H1 H2 H1 H2 H1 H2 ..Key (Fig. 74): - Master Unit - Slave 1 unit Master Unit - Slave 2 unit...
  • Page 66 Connection for other components. P_c P_o P_s P_d AHS1 AHS2 1OFF 2OFF IBH1 N 3ON DFT2 DFT1 3OFF CN11 CN30 Code Print Connection to Code Print Connection to Active solar station contact ① Control panel ① Thermostat Inlet CN30 ② Room (High voltage) SV1 (3-way valve for DHW Cascade system...
  • Page 67 The board of the main hydraulic module supplies two types of control signal ports: Type 1: Potential-free contact. Key (Fig. 76 ): Type 1 - Running 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 13 14 15 16 17 9 1 0 2 3 2 4 2...
  • Page 68 M10-2 - Zone 2 circulator pump The following electrical connection diagram re- M31-2 - Zone 2 mixing valve fers to the 3-way diverter valves (M50 and M52) - 3-way valve with DHW priority supplied by Immergas being used as an optional - Summer/winter switch kit.
  • Page 69 Vertical terminal boards connections diagram Key (Fig. 79): S20-HT - Room thermostat - heating - Adapter wiring S20-CL - Room thermostat - cooling - Thermostat contacts connection - D.H.W. probe - Generator off selector mode B3-2 - Zone 2 flow probe - Solar inlet - Central heating/cooling - Inertial storage tank probe...
  • Page 70 The wiring of the components is illustrated below. - Connect the cable to the appropriate terminals as shown in the figure. - Secure the cable firmly. 4. For the 3-way valves SV1, SV2 and SV3: 25 26 27 28 1 2 3 4 5 25 26 27 28 29 30 31 32...
  • Page 71 5. For Zone 1 pump (PUMP_O): Key (Fig. 82): - Power supply Voltage 220-240VAC 25 26 27 28 Maximum operating current (A) 1 2 3 4 5 Wiring size (mm 0,75 29 30 31 32 6 7 8 9 10 Type of signal of control port Type 2 CN11...
  • Page 72 7. For DHW recirculation pump (PUMP_D): Key (Fig. 84 ): - Power supply Voltage 220-240VAC Maximum operating current (A) 25 26 27 28 1 2 3 4 5 Wiring size (mm 0,75 29 30 31 32 6 7 8 9 10 Type of signal of control port Type 2 CN11...
  • Page 73 9. For solar control unit contact: Key (Fig. 86 ): - Connect to the solar control unit. Request ac- tive with220-240V input. Voltage 220-240VAC Maximum operating current (A) 25 26 27 28 1 2 3 4 5 Wiring size (mm 0,75 29 30 31 32 6 7 8 9 10...
  • Page 74 10. For room thermostat: Room thermostat type 1 (High-voltage): “POWER SUPPLY INPUT” supplies the operating voltage to RT, does not directly supply volt- age to the RT connector. The port“15 L1” supplies 220V voltage to the RT connector. Room thermostat type 2 (Low-voltage): “POWER SUPPLY INPUT” supplies the working voltage to RT. There are two optional connection methods that depend on the type of room thermostat.
  • Page 75 There are three methods to connect the thermostat cable (as described in the previous images) and it depends on the application. • METHOD A (Set mode control). RT can control heating and cooling individually, like the control panel for 4-pipe FCU. When the hydraulic module is connected with the external temperature controller, on the control panel, in the "FOR SERVICEMAN"...
  • Page 76 Room thermostat type 2 (Low-Voltage): Method A (set mode control) Method C (double zone control) CN24 CN21 CN24 CN28 CN16 CN21 CN28 CN16 CN32 CN13 CN32 CN13 CN15 CN29 CN15 CN18 CN29 CN25 CN18 CN42 CN25 CN42 CN40 DIS1 CN40 CN31 DIS1 CN41...
  • Page 77 There are three methods to connect the thermostat cable (as described in the previous images) and it depends on the application. • METHOD A (Set mode control). RT can control heating and cooling individually, like the control panel for 4-pipe FCU. When the hydraulic module is connected with the external temperature controller, on the control panel, in the "FOR SERVICEMAN"...
  • Page 78 11. To activate the tank booster heater (TBH): Key (Fig. 93): - Power supply Voltage 220-240VAC Maximum operating current (A) Wiring size (mm 0,75 Type of signal of control port Type 2 The unit only sends the ON/OFF signal to the heater. 12.
  • Page 79 13. For the alarm signal output: Key (Fig. 95): - Alarm signal Voltage 220-240VAC Maximum operating current (A) Wiring size (mm 0,75 Type of signal of control port Type 1...
  • Page 80 14. For SMART GRID: The unit has the smart grid function, there are two ports on the PCB to connect the SG signal and the EVU signal as follows: CN24 CN21 CN28 CN16 CN32 CN13 CN15 CN29 CN18 CN25 CN42 CN40 DIS1 CN31...

  • Page 81: Start Up And Configuration

    START UP AND CONFIGURATION. The unit must be configured by the installer to be adapted to the installation environment (outside weather, installed options, etc.) and to the competence of the user. It is important that all of the information in this chapter be read in sequence by the installer and that the system be configured as applicable.

  • Page 82: Initial Start-Up At Low Outdoor Temperatures

    10.2 INITIAL START-UP AT LOW OUTDOOR TEMPERATURES. During the initial start-up and when the water temperature is low, it is important to heat the water gradually. Otherwise the concrete floor could crack due to rapid temperature excursions. For further details, please contact the person in charge of making the concrete floor. To perform this operation, the minimum set flow temperature of the water can be reduced to a value between 25°C and 35°C by adjusting it on “FOR SERVICEMAN”...

  • Page 83: The Circulation Pump

    10.4 THE CIRCULATION PUMP. External available static pressure VS Flow rate. External available static pressure VS Flow rate. 4-8 kW 12-16 kW Key (Fig. 98 - 99): - Flow rate (m - Available head (kPa) If the valves are in the wrong position, the circulation pump is damaged. If the operation status of the pump needs to be checked when the unit switches on, please do not touch the internal components of the electric control box to avoid electric shocks.

  • Page 84: On-Field Settings

    10.5 ON-FIELD SETTINGS. The unit must be configured based on the installation environment (outside weather, installed options, etc.) and on the request of the user. Several settings are available. These settings can be accessed and programmed from the section “FOR SERVICEMAN” on the con- trol panel.
  • Page 85 Information on “FOR SERVICEMAN”. The “FOR SERVICEMAN” section is designed to allow the installer to set the parameters. - Definition of the composition of the devices. - Setting the parameters. How to access section “FOR SERVICEMAN”. Go to > FOR SERVICEMAN. Press FOR SERVICEMAN Please input the password: ENTER...
  • Page 86 Setting "DHW MODE". DHW = domestic hot water. Go to > FOR SERVICEMAN > 1. DHW MODE SETTING. Press . The following pages will be displayed: 1. DHW MODE SETTING 1. DHW MODE SETTING 1.1 DHW MODE 1.16 t_DI_MAX 1.2 DISINFECT 1.17 t_DHWHP_RESTRICT 1.3 DHW PRIORITY 1.18 t_DHWHP_MAX...
  • Page 87 Setting "MODE COOL". Go to > FOR SERVICEMAN > 2.COOL MODE SETTING. Press . The following pages will be displayed: 2.COOL MODE SETTING 2.COOL MODE SETTING 25°C 2.1 COOL MODE 2.11 T4C2 2.2 t_T4_FRESH_C HOURS 2.12 ZONE1 C-EMISSION 43°C 2.3 T4CMAX 2.13 ZONE2 C-EMISSION 20°C 2.4 T4CMIN...
  • Page 88 Auto Mode Setting. Go to > FOR SERVICEMAN > 4.AUTO MODE SETTING. Press . The following page will be displayed: 4.AUTO MODE SETTING 25°C 4.1 T4AUTOCMIN 17°C 4.2 T4AUTOHMAX ADJUST Temp. Type Setting. • Information on "5. TEMP. TYPE SETTING". The "5.
  • Page 89 If "5.1 WATER FLOW TEMP." and "5.2 ROOM TEMP." menus are set at "YES", while "DOUBLE ZONE" is set at "NON" or "YES", the fol- lowing pages will appear: Homepage (zone 1) Additional page (zone 2) ◄ In this case, the setting value of zone 1 is T1S, the setting value of zone 2 is T1S2 (the corresponding T1S2 is calculated based on the climat- ic curves).
  • Page 90 Room Thermostat • "6. ROOM THERMOSTAT" menu information. The "6. ROOM THERMOSTAT" menu is used if the room thermostat is available. • How to set the "6. ROOM THERMOSTAT" menu. Go to > FOR SERVICEMAN > 6. ROOM THERMOSTAT. Press .
  • Page 91 Setting Holiday Away. "8. HOLIDAY AWAY SETTING" is used to set the outlet water temperature to prevent freezing during holidays. Go to > FOR SERVICEMAN > 8. HOLIDAY AWAY SETTING. Press . The following page will be displayed: 8. HOLIDAY AWAY SETTING 20°C 8.1 T1S_H.A_H 8.2 T5S_H.A_DHW...
  • Page 92 Restore Factory Settings. The factory setting "10. RESTORE FACTORY SETTINGS" is used to restore all the parameters set in the control panel to the factory set- ting. Go to > FOR SERVICEMAN > 10. RESTORE FACTORY SETTINGS. Press . The following page will be displayed: 10.
  • Page 93 Test Run. The "11. TEST RUN" menu is used to check correct operation of the valves, de-aeration, operation of the circulation pump, cooling, heat- ing and domestic hot water heating. Go to > FOR SERVICEMAN > 11. TEST RUN. Press .
  • Page 94 If you select "11.2 AIR PURGE" and press , the following page is displayed: 11. TEST RUN Test run is on. Air purge is on. ENTER When in the air purge mode, SV1 opens, SV2 closes. 60 seconds later, the pump in the unit (PUMP_I) will run for 10 minutes during which the flow switch will not work.
  • Page 95 When the "11.5 HEAT MODE RUNNING" function is selected, the following page is displayed: 11. TEST RUN Test run is on. Heat mode is on. The outlet water temperature is 15°C. ENTER During execution of the “HEATING” test, the default temperature of the outlet water is 35°C. The IBH switches on after the compressor has been operating for 10 minutes.
  • Page 96 Special Functions. When in special function mode, the control panel cannot work, it does not go back to the main screen and the screen shows the page that executes the special function, the control panel does not block. During operation of special functions, other functions cannot be used (SCHEDULE WEEKLY/TIMER, HOLIDAY AWAY, HOLIDAY HOME).
  • Page 97 The following page will be displayed: 12.1 PREHEATING FOR FLOOR Do you want to turn off the preheating for floor function? ENTER to scroll the cursor to "YES" and press , preheating for floor switches off. Operation of the unit during preheating of the floor is described in the figure below: Key (Fig.
  • Page 98 During floor drying up, only the button is valid. When the heat pump is not running, the floor drying up mode is deactivated when the backup heating source is not available. If you want to deactivate floor drying up, scroll the cursor on "YES" and press 12.2 FLOOR DRYING UP Do you want to turn off the floor drying up function?
  • Page 99 Limits Power Input - How to set in "14. POWER INPUT LIMITATION" menu. Go to > FOR SERVICEMAN > "14. POWER INPUT LIMITATION". 14. POWER INPUT LIMITATION 14.1 POWER INPUT LIMITATION ADJUST Limitation of input current, 0=NO, 1-8=TYPE 1-8 (the data are indicated in ampere) (A)) The following data are indicated in ampere) (A).
  • Page 100 Cascade Setting - How to set in "16.CASCADE SET" menu. Go to > FOR SERVICEMAN > 16.CASCADE SET 16.CASCADE SET 16.1 PER_START 16.2 TIME_ADJUST 16.3 ADDRESS RESET HMI Address setting. - How to set the "17.HMI ADDRESS SET" menu. Go to >...
  • Page 101 Setting the parameters. The parameters in this chapter are shown in the table below. Order Maxi- Interval Code Status Default Minimum Unit number definition DHW MODE Enable or disable DHW mode: 0=NON, 1=YES Enable or disable disinfect mode: 0=NON, DISINFECT 1=YES Enable or disable DHW priority mode: DHW PRIORITY...
  • Page 102 Order Maxi- Interval Code Status Default Minimum Unit number definition COOLING Enable or disable cooling mode: 0=NON, ONLY 1=YES The update time of the climatic curves for t_T4_FRESH_C hours cooling mode The highest outdoor temperature for cooling T4CMAX °C mode The lowest outdoor operating temperature for T4CMIN °C...
  • Page 103 Order Maxi- Interval Code Status Default Minimum Unit number definition The type of zone1 terminal for heating mode: HEAT EMIS- 3.12 CVC fan coil), RAD (radiator), CRP (floor SION ZONE 1 radiant) ZONE 2 The type of zone2 terminal for heating mode: 3.13 HEATING CVC fan coil), RAD (radiator), CRP (floor...
  • Page 104 Order Maxi- Interval Code Status Default Minimum Unit number definition FLOOR DRYING WARM UP Heating days during floor drying up TIME(t_DRYUP) KEEP TIME(t_ High temperature holding days during floor HIGHPEAK) drying up WARM UP Days of temperature drop during floor drying 12.2 TIME(t_DRYUP) PEAK TEMP.
  • Page 105 Order Maxi- Interval Code Status Default Minimum Unit number definition Enable or disable the SMART GRID: 15.2 SMART GRID 0=NON, 1=YES Enable or disable T1b(Tw2): 15.3 0=NON, 1=YES Enable or disable Tbt1: 15.4 Tbt1 0=NON, 1=YES 15.5 Tbt2 Not used Enable or disable Ta: 15.6 HMI=NON, IDU=YES...

  • Page 106: Test Mode And Final Checks

    TEST MODE AND FINAL CHECKS. The installer must check that the unit works properly after installation. 11.1 FINAL CHECKS. Before switching on the appliance, read the following recommendations: - When installation is complete and all the necessary settings have been made, close all the front panels of the unit and put the unit cover back on.

  • Page 107: Maintenance And Service

    • It is prohibited to leave the unit unattended if the protective casing has been removed. The following checks must be carried out at least once a year by qualified Immergas personnel. • Water pressure. - Check the water pressure: if below 1 bar, restore it.

  • Page 108: Troubleshooting

    TROUBLESHOOTING. This section provides useful information for the diagnosis and correction of certain problems which can occur in the unit. Troubleshooting and the relative corrective actions can only be done by your local technician. 13.1 GENERAL GUIDELINES. Before beginning troubleshooting, perform a thorough visual inspection of the unit, looking for evident defects such as loose connec- tions or faulty wiring.
  • Page 109 Symptom 3: the pump makes noise (cavitation). POSSIBLE CAUSES CORRECTIVE ACTION There is air in the system. Purge the air. Check the water pressure: it should be >1 bar (the water is cold). Check that the expansion vessel is not damaged. The pressure of the water entering the pump is too low.
  • Page 110 Symptom 7: the "DHW" mode cannot switch immediately to heating mode. POSSIBLE CAUSES CORRECTIVE ACTION Set "1.18 t_DHWHP_MAX" at the minimum value, the recommended value is 60 min. Heat exchanger for space heating not large enough. If the circulation pump outside of the unit is not controlled by the unit, try to connect it to the unit.

  • Page 111: Operation Parameters

    13.3 OPERATION PARAMETERS. This manual is intended for the installer or service engineer controlling the operating parameters. - On the main screen, go to > OPERATION PARAMETER. - Press . There are nine pages of operation parameters, as indicated below. Press to scroll through them.

  • Page 112: Error Codes

    13.4 ERROR CODES. When a safety device trips, an error code is displayed on the control panel (which does not include an external failure). The table below lists all of the errors and corrective actions. Reset the safety device by switching the unit off and back on. If this safety device reset procedure fails, contact your local dealer.
  • Page 113 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. Check the sensor resistance. 2. The connector of sensor T4 is loose. Reconnect it. Error of room temperature sensor (T4). 3. The connector of sensor T4 is wet or there is water inside. Remove the water, dry the connector.
  • Page 114 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. Check the sensor resistance. 2. The connector of sensor Tbt2 is loose. Reconnect it. Error of low temperature sensor (Tbt2) of 3. The connector of sensor Tbt2 is wet or there is water inside. the thermostat manifold.
  • Page 115 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. The same reason as for P1. Protection against compressor overcur- 2. The supply voltage of the unit is low, increase the supply voltage rent.
  • Page 116 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection Fan protection. Check the condition of the fan and of the fan motor. Antifreeze protection. The unit automatically returns to normal operation. 1. The protection of the heat exchanger has not been removed. Remove the protection.
  • Page 117 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. Check the sensor resistance. 2. The connector of sensor T2B is loose. Reconnect it. Fault of outlet temperature sensor (T2B) of 3. The connector of sensor T2B is wet or there is water inside. refrigerant from the plate heat exchanger Remove the water and dry the connector.
  • Page 118 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. The signal wires of the slave units and of the master unit are not connected effectively. After having checked that all the signal wires are properly connected, and having made sure that there is no strong electricity or strong magnetic interferences, switch the unit back on.
  • Page 119 Supervision Operation anomaly Error Code Cause of fault and corrective action System Error Code or protection 1. The supply voltage of the unit is low, increase the supply voltage to the required range. 2. The space between the units is too narrow for the thermal exchange.

  • Page 120: Technical Specifications

    TECHNICAL SPECIFICATIONS. 14.1 GENERAL. Models 4-16 kW. Single-phase Single-phase Three phase 4/6 kW 8 kW 12/14/16 kW Nominal capacity Chap.technical data Dimensions HxWxD 712x1295x429 mm 865x1385x526 mm 865x1385x526 mm Package dimensions HxLxP 885x1375x475 mm 1035x1465x560 mm 1035x1465x560 mm Minimum flow rate 0.40 m 0.40 m 0.70 m...

  • Page 121: Information On Maintenance

    The manufacturer’s guidelines for maintenance and service must be complied with that all times. Should any doubts arise, con- tact the Authorised Immergas Technical Service for assistance. The following controls must be applied to systems that make use of flam- mable refrigerants: - The recharging amount depends on the size of the room where the appliances containing the refrigerant are installed;...
  • Page 122 a) During repairs of sealed components, all power supplies must be disconnected from the appliance in operation before removing the sealed covers, etc. If it is absolutely necessary that the appliance be energised during maintenance, a permanently operated leak detec- tion device must be used, at the most critical point, to prevent a potentially hazardous situation.
  • Page 123 Before performing this operation, the technician must have extensive knowledge of the appliance and all its details. It is good practice that the refrigerant be recovered correctly. Before performing the intervention, an oil and refrigerant sample must be withdrawn. If an analysis needs to be performed before recovering the refrigerant, power must be available. a) Become acquainted with the appliance and its operation.

  • Page 124: Attachments

    15.1 ATTACHMENTS ANNEX A: Refrigerant cycle Units 4-16 kW. Pos. Description Pos. Description Compressor Expansion vessel 4-way valve Automatic air purge valve Gas- liquid separator Pressure relief valve Air side heat exchanger Y-filter Electronic expansion valve High pressure switch One-way magnetic valve Low pressure switch Filter Pressure sensor...
  • Page 125 ANNEX B: Installation of additional electric heating cable on drainage pipe (optional not supplied by Immergas) Connect the electrical heating cable, on the drainage pipe, to terminal board XT3. Images are for reference purposes only; please refer to the actual product.
  • Page 126 12-14-16 kW (Three phase) Key (Fig. 172): - At the drain outlet heating belt...
  • Page 128 This instruction booklet is made of ecological paper. immergas.com Immergas S.p.A. 42041 Brescello (RE) - Italy Tel. 0522.689011 Fax 0522.680617...

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