Mitsubishi Electric ECODAN EHPX Series Installation Manual Download Page 33

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THW5

THW1

THW2

THW1

THW2

THW5

DHW tank

Heat emitter

Hydrobox

Booster heater

Immersion heater

Heat emitter

Hydrobox

Booster heater

3-way valve (*)

System Set Up

Recommended DHW system

Where system involves a DHW tank:

DHW tank

Immersion

heater

Booster

heater

BH function

System diagram

Thermistor

Present

Absent

Present

For space

heating/

cooling and

DHW

THW: Flow water temp.

THW2: Return water temp.

THW5: Tank water temp.

(optional part

PAC-TH011TK-E)

Present

For space

heating/

cooling and

DHW

THW: Flow water temp.

THW2: Return water temp.

THW5: Tank water temp.

(optional part

PAC-TH011TK-E)

*The use of two 2-way valves can perform same function as a 3-way valve.

Summary of Contents for ECODAN EHPX Series

Page 1: ... idiomas son traducciones del original MANUALE DI INSTALLAZIONE Per un utilizzo sicuro e corretto prima di installare l Hydrobox leggere attentamente questo manuale e quello di installazione dell unità esterna Il testo originale è redatto in lingua inglese Le altre versioni linguistiche rappresentano traduzioni dell originale MANUAL DE INSTALAÇÃO Para uma utilização segura e correcta leia este man...

Page 2: ...nual Maintenance 58 Error Codes 59 Engineers Forms 60 Annual Maintenance Log Book 60 8 Supplementary information 63 Refrigerant collecting pumpdown for split model systems only 63 Back up operation of boiler 63 Multiple outdoor units control 63 Abbreviations and glossary No Abbreviations Word Description 1 Compensation curve mode Space heating incorporating outdoor ambient temperature compensation...

Page 3: ...k or spill onto the hydrobox damage to the unit and or fire could occur Do not place any heavy items on top of the hydrobox When installing or relocating or servicing the hydrobox use only the specified refrigerant R410A to charge the refrigerant lines Do not mix it with any other refriger ant and do not allow air to remain in the lines If air is mixed with the refrigerant then it can be the cause...

Page 4: ...wing tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Contact your nearest dealer for any questions Tools for R410A Gauge manifold Flare tool Charge hose Size adjustment gauge Gas leak detector Vacuum pump adapter Torque wrench Electronic refrigerant charging scale Be sure to use the correct tools If dust debris or moisture enter...

Page 5: ...he first phase begins with the refrigerant being cold and low pressure 1 The refrigerant within the circuit is compressed as it passes through the com pressor It becomes a hot highly pressurised gas The temperature also rises typically to 60 C 2 The hot refrigerant gas is then condensed as it passes across one side of a plate heat exchanger Heat from the refrigerant gas is transferred to the coole...

Page 6: ... air and flow temperatures This data is regularly updated and compared to previous data by the controller to predict changes in room temperature and adjust the heat pump output accordingly By monitoring not only the outdoor ambient but the room and water circuit temperatures the heating is more consistent and sudden spikes in required heating are reduced This results in a lower overall flow temper...

Page 7: ...as 15 88 mm 15 88 mm Target temperature range Flow temperature Heating 25 60 C Cooling 5 25 C Room temperature Heating 10 30 C Cooling Not available Guaranteed operating range Ambient 1 0 35 C 80 RH Outdoor temperature Heating See outdoor unit spec table Cooling See outdoor unit spec table min 10 C 2 Electrical data Control board Power supply Phase voltage frequency N 230V 50Hz Breaker when powere...

Page 8: ...ain cock 9 Water circulation pump 10 Pressure relief valve 11 Flow switch 12 Plate heat exchanger 13 Strainer valve A Inlet from space heating Indirect DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point Table 3 2 1 2 3 6 5 7 8 9 11 10 12 13 ...

Page 9: ...DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point Table 3 3 Technical Information 3 GB Figure 3 4 6 7 8 9 11 10 13 E Figure 3 3 EHSC M EB Split model system without expansion vessel For installation of this model make sure to install a prim...

Page 10: ...ain cock 9 Water circulation pump 10 Pressure relief valve 11 Flow switch 13 Strainer valve A Inlet from space heating Indirect DHW tank pri mary return B Inlet from heat pump C Outlet to heat pump D Outlet to space heating Indirect DHW tank primary flow E Discharge from pressure relief valve installer to pipe connect to suitable drain point Table 3 4 1 2 3 EHPX Packaged model system 3 8 4 7 8 9 1...

Page 11: ...lief valve 11 Flow switch 12 Plate heat exchanger 13 Strainer valve 14 Drain pan A Inlet from space heating Indirect DHW tank pri mary return B Outlet to space heating Indirect DHW tank primary flow C Refrigerant Liquid D Refrigerant Gas E Discharge from pressure relief valve installer to pipe connect to suitable drain point Table 3 5 1 2 3 ERSC Split model system for heating and cooling Figure 3 ...

Page 12: ...tage wires including power cable indoor outdoor cable and external output wires For a wireless receiver option cable use inlet Table 3 8 F A B C D E EHPX Packaged model system Front Side Rear View from below Earth leakage circuit breaker Terminal block Main controller Pressure relief valve Earth leakage circuit breaker Terminal block Main controller Pressure relief valve Automatic air vent Automat...

Page 13: ...ischarge pipe by installer from pressure relief valve G1 2 female valve port within hydrobox casing F Electrical cable inlets For inlets and run low voltage wires including external input wires and thermistor wires For inlets and run high voltage wires including power cable indoor outdoor cable and external output wires For a wireless receiver option cable use inlet G Drain socket O D ø20 Table 3 ...

Page 14: ...ve reaction taking place which will damage the pipework Pa 16 B 21 23 20 22 23 24 24 3 4 5 6 7 8 9 10 11 12 13 14 18 19 25 1 17 24 26 26 24 Water circuit diagram Pa 16 B A 17 20 23 21 22 23 24 24 3 4 15 2 1 5 6 7 8 9 10 11 12 13 14 18 19 25 EHSC Split model system ERSC Split model system for heating and cooling Hydrobox Drain Local system 1 Water supply Drain Cold water DHW Flare connections A Ref...

Page 15: ...r circulation pump field supply 6 Zone1 flow switch field supply 7 Motorized mixing valve field supply 8 Zone2 flow water temp thermistor THW8 option 9 Zone2 return water temp thermistor THW9 option 10 Zone2 water circulation pump field supply 11 Zone2 flow switch field supply 12 Zone2 heat emitters e g underfloor heating field supply 13 Boiler flow water temp thermistor THWB1 option 14 Boiler ret...

Page 16: ...tional and Local building regulations The hydrobox must be located indoors and in a frost free environment for example in a utility room Room Thermostat If fitting a new room thermostat for this system Position it out of direct sunlight and draughts Position it away from internal heat sources Position it in a room without a TRV on the radiator heat emittor Position it on an internal wall Note Do n...

Page 17: ...y secure the back plate to the appropriate wall location Back plate Accessory Unit Hook on the back of casing Back plate Front view of unit Hook Unit Back plate 2 Insert the hook on the back of the hydrobox behind the notch of the back plate The lifting up of the hydrobox is facilitated by first tilting the unit forward using the included packaging cushioning Note Hold the main body of the hydrobo...

Page 18: ... lines Centre line Side edges of the back plate Back plate Keep the edges of the back plate within the width of the unit 3 Referring to How to access Internal Components and Control and Electrical Box fix the unit and the back plate using the included 2 screws accessory items Caution BEFORE performing field piping be sure to fit and tighten these two screws Otherwise the hook could be disengaged a...

Page 19: ...lycol is toxic and must NOT be used in the primary water circuit in case of any cross contamination of the potable circuit New Installation primary water circuit Before connecting outdoor unit thoroughly cleanse pipework of building debris solder etc using a suitable chemical cleansing agent Flush the system to remove chemical cleanser For all packaged model systems add a combined inhibitor and an...

Page 20: ...ic Fig 3 10 Pipework Connections Connections to the hydrobox should be made using the 28 mm compression as appropriate except for ERSC series Do not over tighten compression fittings as this will lead to deformation of the olive ring and potential leaks Note To weld the pipes in the field cool the pipes on the hydrobox using wet towel etc ERSC series have G1 male thread connections Insulation of P...

Page 21: ...d to TBO 1 terminals 1 and 2 OUT1 In this position the pump speed must match the speed of the hydrobox s in built pump Note Refer to 5 2 Connecting inputs outputs Sizing Expansion Vessels Expansion vessel volume must fit the local system water volume To size an expansion vessel both for the heating and cooling circuits the following formula and graph can be used When the necessary expansion vessel...

Page 22: ... The con nection size is G1 2 female The installer MUST connect appropriate discharge pipework from this valve in accordance with local and national regulations Failure to do so will result in discharge from the pressure relief valve directly into the hydrobox and cause serious damage to the product All pipework used should be capable of withstanding discharge of hot water Relief valves should NOT...

Page 23: ...s 1 0 mm Do not use pipes thinner than those specified above Connecting pipes Figure 4 4 1 When commercially available copper pipes are used wrap liquid and gas pipes with commercially available insulation materials heat resistant to 100 C or more thickness of 12 mm or more Apply thin layer of refrigerant oil to pipe and joint seating surface before tight ening flare nut Use two wrenches to tighte...

Page 24: ...hydrobox can be powered in two ways 1 Power cable is run from the outdoor unit to the hydrobox 2 Hydrobox has independent power source Connections should be made to the terminals indicated in the figures to the left below depending on the phase Booster heater and immersion heater should be connected independently from one another to dedicated power supplies Locally supplied wiring should be insert...

Page 25: ... NV The breaker shall be provided to ensure disconnection of all active phase conductors of the supply 2 Max 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 3 The values given in the table above are not always measured against the ground value Notes 1 Wiring size must comply with the applicable local and national codes 2 Indoor unit outdoor unit connecting cords shall not be ...

Page 26: ... provided to ensure disconnection of all active phase conductors of the supply 2 Max 45 m If 2 5 mm used Max 50 m If 2 5 mm used and S3 separated Max 80 m 3 The values given in the table above are not always measured against the ground value Notes 1 Wiring size must comply with the applicable local and national codes 2 Indoor unit outdoor unit connecting cords shall not be lighter than polychlorop...

Page 27: ...supply N 230 V 50 Hz Hydrobox input capacity Main switch Breaker 1 16 A Wiring Wiring No size mm Hydrobox power supply 2 Min 1 5 Hydrobox power supply earth 1 Min 1 5 Hydrobox Outdoor unit 2 2 Min 0 3 Hydrobox Outdoor unit earth Circuit rating Hydrobox L N 3 230V AC Hydrobox Outdoor unit S1 S2 3 Hydrobox Outdoor unit S2 S3 3 24V DC 1 A breaker with at least 3 0 mm contact separation in each pole s...

Page 28: ...Outdoor unit S2 S3 3 24V DC 1 A breaker with at least 3 0 mm contact separation in each pole shall be provided Use earth leakage breaker NV The breaker shall be provided to ensure disconnection of all active phase conductors of the supply 2 Max 120 m 3 The values given in the table above are not always measured against the ground value Notes 1 Wiring size must comply with the applicable local and ...

Page 29: ... to backup heat source operation When outdoor unit stops by error Inactive Active 2 OFF SW2 6 Mixing tank WITHOUT Mixing tank WITH Mixing tank OFF SW2 7 2 zone temperature control Inactive Active OFF SW2 8 OFF SW3 SW3 1 Room thermostat 2 input IN6 logic change Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open OFF SW3 2 Flow switch 2 input IN3 logic change Failure det...

Page 30: ... the heaters and related parts may be reduced 2 To turn on the boiler operation use the main controller to select Boiler in External input setting screen in the service menu Item Name Model and specifications Signal input function Signal input wire Use sheathed vinyl coated cord or cable Max 10 m Wire type CV CVS or equivalent Wire size Stranded wire 0 5 mm to 1 25 mm Solid wire ø0 65 mm to ø1 2 m...

Page 31: ... Do not connect multiple water circulation pumps directly to each output OUT1 OUT2 and OUT3 In such a case connect them via a relay s 3 Do not connect water circulation pumps to both TBO 1 3 4 and CNP1 at the same time 4 Connect an appropriate surge absorber to OUT10 TBO 1 1 2 depending on the load at site Wiring specification and field supply parts Item Name Model and specifications External outp...

Page 32: ... a 3 way valve please read the fol lowing Specification of 2 way valve field supply Power supply 230V AC Current 0 1A Max If over 0 1A you must use a relay Type Normally closed Installation position Electrical connection terminal block Output signal Heating DHW System OFF 2 way valve1 DHW TBO 1 9 10 OFF closed ON open OFF closed 2 way valve2 Heating TBO 2 7 8 ON open OFF closed OFF closed Note Sho...

Page 33: ...tank Immersion heater Booster heater BH function System diagram Thermistor Present Absent Present For space heating cooling and DHW THW1 Flow water temp THW2 Return water temp THW5 Tank water temp optional part PAC TH011TK E Present Present Present For space heating cooling and DHW THW1 Flow water temp THW2 Return water temp THW5 Tank water temp optional part PAC TH011TK E The use of two 2 way val...

Page 34: ... main controller If more than one wireless remote controller is used the most recently requested temperature setting will commonly be applied to all rooms by the central control system regardless of which wireless remote controller was used No hierarchy exists across these remote controllers Wire the wireless receiver to FTC4 referring to the wireless remote controller instruction manual Turn DIP ...

Page 35: ...ermistor is used to monitor the Zone1 room temperature and the thermostat is used to control the Zone2 room temperature The thermostat can be also allocated to Zone1 and the thermistor to Zone2 The thermistor can not make any changes in control operation Any changes to DHW 1 must be made using the main controller mounted on the hydrobox Wire the thermistor to the TH1 connector on FTC4 The number o...

Page 36: ...k the holding clips 5 Lift out the main controller from the front panel of the hydrobox 6 Separate the back and front plates using a flat head screwdriver as shown in Figure 5 5 2 7 Fix the 2 core cable from the FTC4 into the terminal Ensure the wires make good contact and are securely screwed into the terminal block Figure 5 5 3 8 The inner core wires should not be visible from the outside of the...

Page 37: ... for a whilst after the system is powered off Before insertion or ejection wait until the LED lamps on the FTC4 control board are all off 6 The read and write operations have been verified using the following SD memory cards however these operations are not always guaranteed as the specifications of these SD memory cards could change Manufacturer Model Tested in Verbatim 44015 0912 61 Mar 2012 San...

Page 38: ...a prevention mode is active 2 Heat pump Heat pump is running Defrosting Emergency heating 3 Electric heater When this icon is displayed the Electric heaters booster or immersion heater are in use 4 Target temperature Target flow temperature Target room temperature Compensation curve 5 OPTION Pressing the function button below this icon will dis play the quick view menu 6 Increase desired temperatu...

Page 39: ...Day select Time select Time setting Temp setting Zone2 Schedule timer preview Day select Time select Time setting Temp setting Cooling Schedule timer preview Day select Time select Time setting DHW Schedule timer preview Day select Time setting Time setting DHW 2 1 Period Schedule timer preview Day select Time setting Time setting Holiday mode DHW active non active Heating Cooling active non activ...

Page 40: ...nterval Flow temp range Min temp Max temp H P thermo diff adjust ON OFF Lower limit Upper limit Boiler settings Hybrid settings Outdoor ambient temp 2 Priority Ambient Cost CO2 Intelligent settings Energy price Electricity Boiler Schedule CO2 emission Electricity Boiler Heat source Heat pump capacity Boiler efficiency Booster heater 1 capacity Booster heater 2 capacity Floor dry up function ON OFF...

Page 41: ...the title is highlighted press CONFIRM to edit 2 Use function buttons appropriate to edit each setting then press CONFIRM to save the setting Main Settings Menu The main settings menu can be accessed by pressing the MENU button To re duce the risk of untrained end users altering the settings accidentally there are two access levels to the main settings and the service section menu is password prot...

Page 42: ...mode 30 120 min 60 DHW mode restriction The time period after DHW mode when space heating has priority over DHW mode temporarily pre venting further stored water heating Only when DHW max operation time has passed 30 120 min 30 2 When 2 zone temperature control is active or wireless remote controllers are available from Room RC zone select screen select zone no to assign to each remote controller ...

Page 43: ...s a little longer to heat the water in the DHW tank but the energy used is reduced This is because heat pump operation is restricted using signals from the FTC4 based on measured DHW tank temperature Note The actual energy saved in Eco mode will vary according to outdoor ambient temperature Return to the DHW legionella prevention menu Legionella Prevention Mode settings LP mode 1 Use button F3 to ...

Page 44: ...xplanation of compensation curve During late spring and summer usually the demand for space heating is reduced To prevent the heat pump from producing excessive flow temperatures for the primary circuit the compensation curve mode can be used to maximise efficiency and reduce running costs The compensation curve is used to restrict the flow temperature of the primary space heating circuit dependen...

Page 45: ... and F3 buttons to move between mode icons to select the Hot Water DHW 2 icon Use F1 to F4 buttons to select start and end months that apply to Period 2 Press CONFIRM to be shown the preview screen for each mode 2 3 4 5 Holiday mode Holiday mode can be activated in 2 ways Both methods will result in the Holiday Mode activation screen being shown Option 1 From the main menu screen button E should b...

Page 46: ...o set the required time of inactivity then press CONFIRM 8 You can add up to 4 periods of inactivity within a 24 hour interval 9 Press F4 to save settings When scheduling heating button F1 changes the scheduled variable between time and temperature This enables a lower temperature to be set for a number of hours e g a lower temperature may be required at night when the occupants are sleeping Note ...

Page 47: ...rce setting Operation settings External input settings Running information Thermistor reading Summary of settings Error history Password protection Manual reset SD card In this Installation Manual instructions will be given only for the following functions Manual operation Auxiliary settings Heat source setting Operation settings External input settings Password protection Manual reset SD card Inf...

Page 48: ...en The function selected will only remain in manual operation for a maximum of 2 hours This is to prevent accidental permanent override of the FTC4 From the service menu use F1 and F2 buttons to scroll through list until Manual Operation is highlighted Press CONFIRM Manual operation menu screen is displayed To activate manual operation press the function button under the desired part Example Press...

Page 49: ... it could take longer to warm up a room 1 2 3 4 1 2 3 4 Mixing valve setting screen Pump speed setting screen Pump speed From the Auxiliary settings menu highlight water circulation pump speed Press CONFIRM Press F3 and F4 buttons to select a refrigerant address of which you wish to configure or check the settings Press CONFIRM The Pump speed screen is displayed Use F2 and F3 buttons to set the pu...

Page 50: ...the list until Simultaneous operation is highlighted Press CONFIRM Simultaneous operation screen is displayed To switch simultaneous operation ON OFF press F1 To alter the temperature at which simultaneous operation starts use F3 and F4 Note Range of outdoor ambient temperature is 15 C to 10 C default 15 C System shall automatically return to routine operation This will happen when the outdoor amb...

Page 51: ...changes the target hot water temperature in stages to gradually dry concrete when this particular type of underfloor heating system is installed 1 Turn off the system using the main controller 2 From the Operation settings in the service menu use F1 and F2 buttons to scroll through the list until Floor dry up function is highlighted 3 Press CONFIRM to display the FLOOR DRY UP screen 4 To change se...

Page 52: ...tion 2 3 4 5 Password protection Password protection is available to prevent unauthorised access to the service menu by untrained persons From the service menu use F1 and F2 buttons to scroll through list until Pass word protection is highlighted Press CONFIRM When password input screen is displayed use buttons F1 and F2 to move left and right between the four digits F3 to lower the selected digit...

Page 53: ...mory card simplifies the main controller settings in the field Ecodan service tool for use with PC tool is necessary for the setting SD Main RC From the SD card setting use F1 and F2 buttons to scroll through list until SD Main RC is highlighted Press CONFIRM Use F1 F2 and F3 buttons to select a menu to write to the main controller Press CONFIRM to start downloading Wait for a few minutes until Co...

Page 54: ... wiring Correct cables used 9 Electrical maintenance access Good Poor 10 Connection of mains power source Outdoor unit electric cable Type Size Indoor unit electric cable Type Size 11 Connection of control cable 12 Anti freeze Refer to product guidelines Also se section 4 2 Note 13 Check pre charge in the expansion vessel s Yes No 14 Pressurise primary heating circuit to 1 bar Yes No 15 Release ai...

Page 55: ...he FTC4 control board Ensure S1 and S2 are not cross wired and S3 is securely wired with no damage See section 4 5 Replace the outdoor unit s and or the FTC4 s control boards 3 Communication failure between FTC4 and outdoor unit 3 The main screen appears with a press of the ON button but disappears in a second The main controller operations do not work for a whilst after the settings are changed i...

Page 56: ...d is NOT inserted into the memory card slot with correct orientation 1 Correctly insert SD memory card in place until a click is heard 2 Not an SD standards compliant memory card 2 Use an SD standards compliant memory card Refer to section 5 6 LED4 on FTC4 is blinking See Figure 5 2 1 1 Full of data 1 Move or delete data or replace SD memory card with a new one 2 Write protected 2 Release the writ...

Page 57: ...es not still function go to iii below iii Replace 3 way valve Refer to the service manual 11 Hot or warm water from cold tap Heat of hot water pipe is transferred to cold water pipe Insulate re route pipework 12 Water leakage 1 Poorly sealed connections of water circuit components 1 Tighten connections as required 2 Water circuit components reaching the end of life 2 Refer to PARTS CATALOG in the ...

Page 58: ...y be damaged 1 Turn the handle on the pressure relief valve to check for foreign objects in it If the problem is not still solved replace the pressure relief valve with a new one 2 If intermittent expansion vessel charge may have reduced bladder perished 2 Check pressure in expansion vessel Recharge to 1 bar if necessary If bladder perished replace expansion vessel with a new one 20 Water discharg...

Page 59: ...t pump only operation Refer to Electric heater DHW on Page 47 31 During DHW or LP mode following the cooling mode error L6 circulation water freeze protection occurs and operation stops frequently If the preset temperature below which the freeze stat function is activated is low error L6 is more likely to occur interruption operation before the freeze stat function is activated Adjust the preset t...

Page 60: ...ed Check for water leakage strainer blockage water circulation pump function LL Setting errors of Dip switches on FTC4 control board For boiler operation check that Dip SW1 1 is set to ON With Boiler and Dip SW2 6 is set to ON With Mixing Tank For 2 zone temperature control check Dip SW2 7 is set to ON 2 zone and Dip SW2 6 is set to ON With Mixing Tank J0 Communication failure between FTC4 and wir...

Page 61: ...oor ambient temp 15 C 35 C 35 C Zone1 flow temp 25 C 60 C 25 C Zone2 outdoor ambient temp 1 15 C 35 C 35 C Zone2 flow temp 1 25 C 60 C 25 C Adjust Zone1 outdoor ambient temp 14 C 34 C Zone1 flow temp 25 C 60 C Zone2 outdoor ambient temp 1 14 C 34 C Zone2 flow temp 1 25 C 60 C Holiday DHW 3 Active Non active Non active Heating Cooling 2 Active Non active Active Zone1 heating room temp 10 C 30 C 15 ...

Page 62: ...nergy price 7 Electricity 0 001 999 kWh 0 5 kWh Boiler 0 001 999 kWh 0 5 kWh CO2 emission Electricity 0 001 999 kg CO2 kWh 0 5 kg CO2 kWh Boiler 0 001 999 kg CO2 kWh 0 5 kg CO2 kWh Heat source Heat pump capacity 1 40 kW 11 2 kW Boiler efficiency 25 150 80 Booster heater 1 capacity 1 20 kW 2 kW Booster heater 2 capacity 1 20 kW 4 kW Floor dry up function On Off 6 Off Target temp Start Finish 25 60 ...

Page 63: ...ntenance record sheet Model number Serial number Mechanical Frequency Notes 1 Inspect grill heat exchanger fins and air inlet for trapped debris damage 2 Check condensate drain provision 3 Check integrity of water pipe work and insulation 4 Check all electrical connections 5 Check and record the operation voltage All the above checks should be carried out once a year Note Within the first couple o...

Page 64: ...roller remote position 1 The boiler temp thermistor is an optional part 2 OUT10 has no voltage across it 3 Boiler heating is controlled on off by the room temp thermostat Remote controller settings 1 Go to Service menu Heat source setting and choose Boiler or Auto 3 2 Go to Service menu Operation settings Boiler settings to make detailed settings for Auto above 3 The Auto automatically switches he...

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