Mitsubishi Electric ecodan EHST17D-VM2D User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL................................... 3
2. SAFETY PRECAUTION................................... 4
3. SPECIFICATIONS............................................ 6
4. PART NAMES AND FUNCTIONS .................. 9
5. OUTLINES AND DIMENSIONS......................11
6. WIRING DIAGRAM........................................ 13
7. FIELD WIRING............................................... 19
8. WATER SYSTEM DIAGRAM......................... 23
9. CONTROLS ................................................... 27
10. TROUBLESHOOTING................................... 48
11. DISASSEMBLY PROCEDURE...................... 65
12. SUPPLEMENTARY INFORMATION ............. 86
13. SERVICE AND MAINTENANCE ................... 87
Note:
•This manual describes service
data of cylinder unit only.
PARTS CATALOG (OCB714)
CYLINDER UNIT
CYLINDER UNIT
MAIN REMOTE
CONTROLLER
March 2020
No. OCH714
REVISED EDITION-A
[Model Name]
EHST17D-VM2D
ERST17D-VM2D
EHST20D-MED
EHST20D-VM2D
EHST20D-VM6D
EHST20D-YM9D
EHST20D-YM9ED
EHST20D-TM9D
ERST20D-VM2D
EHST30D-MED
EHST30D-VM6ED
EHST30D-YM9ED
EHST30D-TM9ED
ERST30D-VM2ED
EHST20C-MED
EHST20C-VM2D
EHST20C-VM6D
[Service Ref.]
Refer to page 2.
EHST20C-YM9D
EHST20C-YM9ED
EHST20C-TM9D
ERST20C-VM2D
EHST30C-MED
EHST30C-VM6ED
EHST30C-YM9ED
EHST30C-TM9ED
ERST30C-VM2ED
EHPT17X-VM2D
EHPT17X-VM6D
EHPT17X-YM9D
ERPT17X-VM2D
EHPT20X-MED
EHPT20X-VM6D
EHPT20X-YM9D
EHPT20X-YM9ED
EHPT20X-TM9D
EHPT20X-MHEDW
ERPT20X-MD
ERPT20X-VM2D
ERPT20X-VM6D
EHPT30X-MED
EHPT30X-YM9ED
ERPT30X-VM2ED
Revision:
• Added packaged models
• Some descriptions have
been modified
in REVISED
EDITION-A .
OCH714 is void.

2
OCH714A
[Service Ref.]
EHST17D-VM2D.UK
ERST17D-VM2D.UK
EHST20D-MED.UK
EHST20D-VM2D.UK
EHST20D-VM6D.UK
EHST20D-YM9D.UK
EHST20D-YM9ED.UK
EHST20D-TM9D.UK
ERST20D-VM2D.UK
EHST30D-MED.UK
EHST30D-VM6ED.UK
EHST30D-YM9ED.UK
EHST30D-TM9ED.UK
ERST30D-VM2ED.UK
EHST20C-MED.UK
EHST20C-VM2D.UK
EHST20C-VM6D.UK
EHST20C-YM9D.UK
EHST20C-YM9ED.UK
EHST20C-TM9D.UK
ERST20C-VM2D.UK
EHST30C-MED.UK
EHST30C-VM6ED.UK
EHST30C-YM9ED.UK
EHST30C-TM9ED.UK
ERST30C-VM2ED.UK
EHPT17X-VM2D.UK
EHPT17X-VM6D.UK
EHPT17X-YM9D.UK
ERPT17X-VM2D.UK
EHPT20X-MED.UK
EHPT20X-VM6D.UK
EHPT20X-YM9D.UK
EHPT20X-YM9ED.UK
EHPT20X-TM9D.UK
EHPT20X-MHEDW.UK
ERPT20X-MD.UK
ERPT20X-VM2D.UK
ERPT20X-VM6D.UK
EHPT30X-MED.UK
EHPT30X-YM9ED.UK
ERPT30X-VM2ED.UK

3
OCH714A
REFERENCE MANUAL
1
OUTDOOR UNIT'S SERVICE MANUAL
Service Ref. Service Manual No.
Split model
SUZ-SWM40VA.TH
SUZ-SWM60VA.TH
SUZ-SWM80VA.TH
OCH718
OCB718
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1
OCH665
OCB665
PUHZ-SW120VHAR5(-BS).UK
PUHZ-SW120YHAR5(-BS).UK
OCH533
OCB533
PUHZ-SHW140YHAR5(-BS).UK OCH526
OCB526
PUHZ-SHW80VAA(-BS).UK
PUHZ-SHW80YAA(-BS).UK
PUHZ-SHW112VAA(-BS).UK
PUHZ-SHW112YAA(-BS).UK
PUHZ-SW75VAA(-BS).UK
PUHZ-SW75YAA(-BS).UK
PUHZ-SW75VAA-SC.UK
PUHZ-SW75YAA-SC.UK
PUHZ-SW100VAA(-BS).UK
PUHZ-SW100YAA(-BS).UK
OCH651
OCB651
PUMY-P112VKM4R4(-BS).UK
PUMY-P125VKM4R4(-BS).UK
PUMY-P140VKM4R4(-BS).UK
PUMY-P112YKM4R4(-BS).UK
PUMY-P125YKM4R4(-BS).UK
PUMY-P140YKM4R4(-BS).UK
PUMY-P112YKME4R4(-BS).UK
PUMY-P125YKME4R4(-BS).UK
PUMY-P140YKME4R4(-BS).UK
OCH673
OCB673
PUD-SWM60VAA(-BS).UK
PUD-SWM80VAA(-BS).UK
PUD-SWM80YAA(-BS).UK
PUD-SWM100VAA(-BS).UK
PUD-SWM100YAA(-BS).UK
PUD-SWM120VAA(-BS).UK
PUD-SWM120YAA(-BS).UK
PUD-SHWM60VAA(-BS).UK
PUD-SHWM80VAA(-BS).UK
PUD-SHWM80YAA(-BS).UK
PUD-SHWM100VAA(-BS).UK
PUD-SHWM100YAA(-BS).UK
PUD-SHWM120VAA(-BS).UK
PUD-SHWM120YAA(-BS).UK
PUD-SHWM140YAA(-BS).UK
OCH694
OCB694
Packaged model
PUZ-WM50VHA(-BS).UK
PUZ-WM60VAA.UK
PUZ-WM85VAA.UK
PUZ-WM85YAA.UK
PUZ-WM112VAA.UK
PUZ-WM112YAA.UK
OCH727
OCB727

4
OCH714A
SAFETY PRECAUTION
2
Please read the following safety precautions carefully.
WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damage to unit.
• Be sure to perform periodical maintenance.
• Be sure to follow your local regulations.
• Be sure to follow the instructions provided in this manual.
WARNING
Mechanical
The cylinder unit and outdoor unit must not be installed, disassembled, relocated, altered or repaired by the user. Ask an authorised installer or technician. If
the unit is installed improperly or modied after installation by the user, water leakage, electric shock or re may result.
The outdoor unit should be securely xed to a hard level surface capable of bearing its weight.
The cylinder unit should be positioned on a hard level surface capable of supporting its lled weight to prevent excessive sound or vibration.
Do not position furniture or electrical appliances below the outdoor unit or cylinder unit.
The discharge pipework from the emergency devices of the cylinder unit should be installed according to local law.
Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualied technician to t the parts.
Electrical
All electrical work should be performed by a qualied technician according to local regulations and the instructions given in this manual.
The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used.
Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals.
Earth unit correctly.
Discharge the condenser before the work involving the electric parts.
General
Keep children and pets away from both the cylinder unit and outdoor units.
Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user.
Do not stand on the units.
Do not touch switches with wet hands.
Annual maintenance checks on both the cylinder unit and the outdoor unit should be conducted by a qualied person.
Do not place containers with liquids on top of the cylinder unit. If they leak or spill onto the cylinder unit, damage to the unit and/or re could occur.
Do not place any heavy items on top of the cylinder unit.
When installing, relocating, or servicing the cylinder unit, use only the heat pump's specied refrigerant to charge the refrigerant lines. Do not mix it with any
other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refriger-
ant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specied for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this
could lead to a serious impediment to securing product safety.
In heating mode, to avoid the heat emitters being damaged by excessively hot water, set the target ow temperature to a minimum of 2ºC below the maximum
allowable temperature of all the heat emitters. For Zone2, set the target ow temperature to a minimum of 5ºC below the maximum allowable ow temperature
of all the heat emitters in Zone2 circuit.
Do not install the unit where combustible gases may leak, be produced, ow, or accumulate. If combustible gas accumulates around the unit, re or explosion may
result.
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for example: open ames, an operating gas appliance or an operating
electric heater).
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Pipe-work shall be protected from physical damage.
The installation of pipe-work shall be kept to a minimum.
Compliance with national gas regulations shall be observed.
Keep any required ventilation openings clear of obstruction.
Do not use low temperature solder alloy in case of brazing the refrigerant pipes.
MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
(Risk of re)
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
In case that refrigerant type is R32, this unit uses a ammable refrigerant.
If refrigerant leaks and comes in contact with re or heating part, it will create harmful gas and there is risk of re.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.

Electronic weighing scale
Unit
5
OCH714A
CAUTION
Use clean water that meets local quality standards on the primary circuit.
The outdoor unit should be installed in an area with sufcient airow according to the diagrams in the outdoor unit installation manual.
The cylinder unit should be located inside to minimise heat loss.
Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.
Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.
Remove as much air as possible from the primary and DHW circuits.
Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.
Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
Battery ingestion may cause choking and/or poisoning.
Install the unit on a rigid structure to prevent excessive sound or vibration during operation.
Do not transport the cylinder unit with water inside the DHW tank. This could cause damage to the unit.
If power to the cylinder unit is to be turned off (or system switched off) for a long time, the water should be drained.
If unused for a long period, before operation is resumed, DHW tank should be ushed through with potable water.
Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the man-
ufacturer.
As for the handling of refrigerant, refer to the outdoor unit installation manual.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from refrigerant cylinder
(1) Check that cylinder for R410A or R32 on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
[3] Service tools
Use the service tools below as exclusive tools for R410A or R32 refrigerant.
No. Tool name Specifications
1Gauge manifold
· R410A or R32
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2Charge hose · R410A or R32
· Use pressure performance of 5.09 MPa·G or over.
3Electronic weighing scale —
4Gas leak detector · Use the detector for R134a, R407C, R410A or R32
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · R410A or R32 · Top of cylinder (Pink)
· Cylinder with syphon
8Refrigerant recovery equipment —

6
OCH714A
SPECIFICATIONS
3
Model name
EHST17D-
VM2D
ERST17D-
VM2D
EHST20D-
MED
EHST20D-
VM2D
EHST20D-
VM6D
EHST20D-
YM9D
EHST20D-
YM9ED
EHST20D-
TM9D
ERST20D-
VM2D
EHST30D-
MED
EHST30D-
VM6ED
EHST30D-
YM9ED
EHST30D-
TM9ED
ERST30D-
VM2ED
Nominal domestic hot water volume
170 L 200 L 300 L
Overall unit dimensions (Height × Width × Depth) 1400 × 595 × 680 mm 1600 × 595 × 680 mm 2050 × 595 × 680 mm Weight (empty) 93 kg 98 kg 104 kg 105 kg 106 kg 101 kg 106 kg 104 kg 113 kg 115 kg 116 kg 114 kg Weight (full) 269 kg 304 kg 310 kg 311 kg 314 kg 309 kg 314 kg 310 kg 420 kg 422 kg 425 kg 421 kg
Water volume of heating circuit in the unit *1 3.4 L 3.5 L 5.8 L 3.5 L 3.9 L 3.9 L 6.2 L 3.9 L
Unvented expansion vessel(Primary heating)
Nominal volume 12 L — 12 L — 12 L — Charge pressure 0.1 MPa — 0.1 MPa — 0.1 MPa —
Safety device
Primary circuit
Control thermistor 1 to 80°C Pressure relief valve 0.3 MPa (3 bar) Flow sensor Min. ow 5.0 L/min BH manual reset thermostat 90°C — 90°C — 90°C BH thermal Cut Off 121°C — 121°C — 121°C
DHW tank
Control thermistor 75°C IH manual reset thermostat — Temperature / Pressure relief valve 1.0 MPa (10 bar)
Connections
Water Primary circuit ø28 mm
DHW circuit ø22 mm
Refrigerant (R32/ R410A)
Liquid 6.35 mm Gas 12.7 mm
Operating range
Heating Room temperature 10 to 30 °C
Flow temperature 20 to 60 °C
Cooling Room temperature —
Flow temperature — 5 to 25 °C — 5 to 25 °C — 5 to 25 °C
Guaranteed operat- ing range *2
Ambient 0 to 35°C ( 80 %RH)
Outdoor temperature
Heating See outdoor unit spec table. Cooling — *3 — *3 — *3
DHW tank performance
Maximum allowable hot water temperature
70 °C *4 70 °C *4 70 °C
Declared load prole L XL Average climate
Water heater energy efciency class A+ A or A+
Electrical data
Control board (Including 4 pumps)
Power supply
(Phase, voltage, frequency)
~/N, 230 V, 50 Hz
Input 0.30 kW Current 1.95 A Breaker 10 A
Booster heater
Power supply
(Phase, voltage, frequency)
~/N, 230 V,
50 Hz
—
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3~, 230 V,
50 Hz
~/N, 230 V,
50 Hz
—
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3~, 230 V,
50 Hz
~/N, 230 V,
50 Hz
Capacity 2 kW — 2 kW 2 kW+4 kW 3 kW+6 kW 2 kW — 2 kW
+4 kW
3 kW
+6 kW 2 kW
Heater step 1 — 1 3 1 — 3 1
Current 9 A —9 A 26 A 13 A 23 A 9 A —26 A 13 A 23 A 9 A
Breaker 16 A —16 A 32 A 16 A 32 A 16 A — 32A 16 A 32A 16 A
Immersion heater *5
Power supply (Phase, voltage, frequency) — Capacity — Current — Breaker —
Sound power level (PWL) 41 dB(A)
<Table 3.1>
*1 Volume of sanitary water circuit, primary DHW circuit (from 3-way valve to conuent point with heating circuit), piping to expansion vessel, and expansion vessel are not included in this value. *2 The environment must be frost-free. *3 See outdoor unit spec table (min, 10 °C). Cooling mode is not available in low outdoor temperature. If you use our system in cooling mode at the low ambient temperature (10°C or below), there are some risks of plate heat exchanger damages by frozen water.
*4 For the model without booster heater and immersion heater, the maximum allowable hot water temperature is [Maximum outlet water of outdoor unit -3°C]. For the maximum outlet water of outdoor unit, refer to outdoor unit data book. *5 Do not t immersion heaters without thermal cut-out. Use only Mitsubishi Electric service parts as a direct replacement.

7
OCH714A
<Table 3.2>
*1 Volume of sanitary water circuit, primary DHW circuit (from 3-way valve to conuent point with heating circuit), piping to expansion vessel, and expansion vessel are not included in this value. *2 The environment must be frost-free. *3 See outdoor unit spec table (min, 10 °C). Cooling mode is not available in low outdoor temperature. If you use our system in cooling mode at the low ambient temperature (10°C or below), there are some risks of plate heat exchanger damages by frozen water.
*4 For the model without booster heater and immersion heater, the maximum allowable hot water temperature is [Maximum outlet water of outdoor unit -3°C]. For the maximum outlet water of outdoor unit, refer to outdoor unit data book. *5 Do not t immersion heaters without thermal cut-out. Use only Mitsubishi Electric service parts as a direct replacement.
Model name
EHST20C-
MED
EHST20C-
VM2D
EHST20C-
VM6D
EHST20C-
YM9D
EHST20C-
YM9ED
EHST20C-
TM9D
ERST20C-
VM2D
EHST30C-
MED
EHST30C-
VM6ED
EHST30C-
YM9ED
EHST30C-
TM9ED
ERST30C-
VM2ED
EHPT17X-
VM2D
EHPT17X-
VM6D
EHPT17X-
YM9D
ERPT17X-
VM2D
Nominal domestic hot water volume
200 L
300 L 170 L
Overall unit dimensions (Height × Width × Depth) 1600 × 595 × 680 mm 2050 × 595 × 680 mm 1400 × 595 × 680 mm
Weight (empty) 106 kg 113 kg 114 kg 115 kg 109 kg 115 kg 113 kg 118 kg 120 kg 121 kg 120 kg 87 kg 88 kg 89 kg 87 kg Weight (full) 314 kg 320 kg 321 kg 324 kg 319 kg 324 kg 320 kg 426 kg 422 kg 431 kg 428 kg 263 kg 264 kg 267 kg 263 kg Water volume of heating circuit in the unit *1 4.6 L 6.9 L 6.9 L 4.6 L 5.0 L 7.3 L 5.0 L 3.2 L 5.5 L 3.2 L
Unvented expansion vessel(Primary heating)
Nominal volume — 12 L — 12 L — 12 L Charge pressure — 0.1 MPa — 0.1 MPa — 0.1 MPa
Safety device
Primary circuit
Control thermistor 1 to 80°C Pressure relief valve 0.3 MPa (3 bar) — Flow sensor Min. ow 5.0 L/min BH manual reset thermostat — 90°C — 90°C
BH thermal Cut Off — 121°C — 121°C
DHW tank
Control thermistor 75°C IH manual reset thermostat — Temperature / Pressure relief valve 1.0 MPa (10 bar)
Connections
Water Primary circuit ø28 mm
DHW circuit ø22 mm
Refrigerant (R32/ R410A)
Liquid 9.52 mm — Gas 15.88 mm —
Operating range
Heating Room temperature 10 to 30 °C
Flow temperature 20 to 60 °C
Cooling Room temperature —
Flow temperature — 5 to 25 °C — 5 to 25 °C — 5 to 25 °C
Guaranteed operat- ing range *2
Ambient 0 to 35°C ( 80 %RH)
Outdoor temperature
Heating See outdoor unit spec table. Cooling — *3 — *3 — *3
DHW tank performance
Maximum allowable hot water temperature
*4 70 °C *4 70 °C
Declared load prole L XL L
Average climate
Water heater energy efciency class A+ A A+
Electrical data
Control board (Including 4 pumps)
Power supply
(Phase, voltage, frequency) ~/N, 230 V, 50 Hz Input 0.30 kW Current 1.95 A Breaker 10 A
Booster heater
Power supply (Phase, voltage, frequency)
—
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3~, 230 V,
50 Hz
~/N, 230 V,
50 Hz
—
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3~, 230 V,
50 Hz
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
~/N, 230 V,
50 Hz
Capacity — 2 kW 2 kW+4 kW 3 kW + 6 kW 3 kW+6 kW 2 kW — 2 kW
+4 kW
3 kW
+6 kW 2 kW 2 kW
+4 kW
3 kW
+6 kW 2 kW
Heater step — 1 3 3 1 — 3 3 1 3 1
Current — 9 A 26 A 13 A 23 A 9 A —26 A 13 A 23 A 9 A 26 A 13 A 9 A Breaker — 16 A 32 A 16 A 32 A 16 A —32 A 16 A 32 A 16 A 32 A 16 A 16 A
Immersion heater *5
Power supply (Phase, voltage, frequency) — Capacity — Current — Breaker —
Sound power level (PWL) 40 dB(A)

8
OCH714A
<Table 3.3>
*1 Volume of sanitary water circuit, primary DHW circuit (from 3-way valve to conuent point with heating circuit), piping to expansion vessel, and expansion vessel are not included in this value. *2 The environment must be frost-free. *3 See outdoor unit spec table (min, 10 °C). Cooling mode is not available in low outdoor temperature. If you use our system in cooling mode at the low ambient temperature (10°C or below), there are some risks of plate heat exchanger damages by frozen water.
*4 For the model without booster heater and immersion heater, the maximum allowable hot water temperature is [Maximum outlet water of outdoor unit -3°C]. For the maximum outlet water of outdoor unit, refer to outdoor unit data book. *5 Do not t immersion heaters without thermal cut-out. Use only Mitsubishi Electric service parts as a direct replacement.
Model name
EHPT20X-
MED
EHPT20X-
VM6D
EHPT20X-
YM9D
EHPT20X-
YM9ED
EHPT20X-
TM9D
EHPT20X-
MHEDW
ERPT20X-
MD
ERPT20X-
VM2D
ERPT20X-
VM6D
EHPT30X-
MED
EHPT30X-
YM9ED
ERPT30X-
VM2ED
Nominal domestic hot water volume 200 L
300 L
Overall unit dimensions (Height × Width × Depth) 1600 × 595 × 680 mm 2050 × 595 × 680 mm
Weight (empty) 87 kg 94 kg 96 kg 90 kg 96 kg 94 kg 93 kg 94 kg 95 kg 107 kg 110 kg 108 kg
Weight (full) 293 kg 301 kg 304 kg 299 kg 304 kg 300 kg 299 kg 300 kg 301 kg 414 kg 419 kg 415 kg
Water volume of heating circuit in the unit *1 3.7 L 6.0 L 3.7 L 3.7 L 4.4 L 6.7 L 4.4 L
Unvented expansion vessel(Primary heating)
Nominal volume — 12 L — 12 L — 12 L —
Charge pressure — 0.1 MPa — 0.1 MPa — 0.1 MPa —
Safety device
Primary circuit
Control thermistor 1 to 80°C Pressure relief valve — Flow sensor Min. ow 5.0 L/min BH manual reset thermostat — 90°C 90°C — — 90°C — 90°C BH thermal Cut Off — 121°C 121°C — — 121°C — 121°C
DHW tank
Control thermistor 75°C IH manual reset thermostat — Temperature/ Pressure relief valve 1.0 MPa (10 bar) 90°C /
0.7 MPa (7 bar) 1.0 MPa (10 bar)
Connections
Water Primary circuit ø28 mm
DHW circuit ø22 mm
Refrigerant (R32/ R410A)
Liquid — Gas —
Operating range
Heating Room temperature 10 to 30 °C
Flow temperature 20 to 60 °C
Cooling Room temperature —
Flow temperature — 5 to 25 °C — 5 to 25 °C
Guaranteed operat- ing range *2
Ambient 0 to 35°C ( 80 %RH)
Outdoor temperature
Heating See outdoor unit spec table. Cooling — *3 —
DHW tank performance
Maximum allowable hot water temperature
*4 70 °C *4 70 °C *4 70 °C
Declared load prole L XL Average climate
Water heater energy efciency class A+ A
Electrical data
Control board (Including 4 pumps)
Power supply
(Phase, voltage, frequency)
~/N, 230 V, 50 Hz
Input 0.30 kW 0.34 kW
Current 1.95 A 2.56 A Breaker 10 A
Booster heater
Power supply
(Phase, voltage, frequency)
—
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
3~, 230 V,
50 Hz — —
~/N, 230 V,
50 Hz
—3~, 400 V,
50 Hz
~/N, 230 V,
50 Hz
Capacity — 2 kW
+4 kW
3 kW
+6 kW — — 2 kW 2 kW
+4 kW —3 kW
+6 kW 2 kW
Heater step — 3 3 — — 1 3 — 3 1 Current — 26 A 13 A 23 A — — 9 A 26 A —13 A 9 A
Breaker — 32 A 16 A 32 A — — 16 A 32 A —16 A 16 A
Immersion heater *5
Power supply (Phase, voltage, frequency) —~/N, 230 V, 50
Hz —
Capacity — 3 kW — Current — 13 A — Breaker — 16 A —
Sound power level (PWL) 40 dB(A)

9
OCH714A
PART NAMES AND FUNCTIONS
4
<Table 4.1>
<Figure 4.1>
<E**T***-*M**D>
(Packaged model system)
Note:
For installation of all E**T***-*M*ED* models,
make sure to install a suitably sized primary-
side expansion vessel and an additional PRV
to prevent the expansion vessel from burst
in the eld. (See gure 3.2 ~ 3.3 and 4.3.2 for
further guidance)
(Split model system)
A
B
9
10
1
18
11
19
22
16
6
14
D
7
2
15
4
12
13
C
E
F
17
30
21
23
A
B
98
10
1
18
11
19
22
16
6
14
D
7
2
15
4
12
13
C
H
G
17
30
21
23
3
No. Part name
EHST17/20D-
*M*D
EHST20/30D-
*M*ED
EHST20/30D-
MED
EHST20C-
*M*D
EHST20/30C-
*M*ED
EHST20/30C-
MED
ERST17/20D-
VM2D
ERST30D-
VM2ED
A DHW outlet pipe
B Cold water inlet pipe
C Water pipe (Space heating/cooling return connection)
D Water pipe (Space heating/cooling ow connection)
E Water pipe (Flow from heat pump connection) — — — — — — — —
F Water pipe (Return to heat pump connection) — — — — — — — —
G Refrigerant pipe (Gas)
H Refrigerant pipe (Liquid)
1Control and electrical box
2 Main remote controller
3Plate heat exchanger (Refrigerant - Water)
4 Booster heater 1,2 — —
5 3-way valve
6 Drain cock (Primary circuit)
7 Manometer
8 Pressure relief valve (3 bar) *2, 3 *2 *2, 3 *2, 3 *3
9 Automatic air vent
10 Expansion vessel (Primary circuit) — — — — —
11 Flow sensor
12 Strainer valve
13 Water circulation pump 1 (Primary circuit)
14 Pump valve
15 DHW tank
16 Plate heat exchanger (Water - Water)
17 Scale trap
18 Water circulation pump (Sanitary circuit)
19 Immersion heater — — — — — — — —
20 Temperature and pressure relief valve — — — — — — — —
21 Pressure relief valve (10 bar) (DHW Tank)
22 Drain cock (DHW tank)
23 Drain cock (Sanitary circuit)
24 Flow water temp. thermistor (THW1)
25 Return water temp. thermistor (THW2)
26 DHW tank upper water temp. thermistor (THW5A)
27 DHW tank lower water temp. thermistor (THW5B)
28 Refrigerant liquid temp. thermistor (TH2)
29 Pressure sensor — — —
30 Drain pan — — — — — —
31 Outdoor unit — — — — — — — —
32 Drain pipe (Local supply) — — — — — — — —
33 Back ow prevention device (Local supply) ————————
34 Isolating valve (Local supply) — — — — — — — —
35 Magnetic lter (Local supply) (Recommended) ————————
36 Strainer (Local supply) — — — — — — — —
37 Additional PRV (Local supply) — — — — — — — —
38 Inlet control group *1 — — — — — — — —
39
Filling loop (Ball valves, check valves and exible hose) *1 ————————
40 Potable expansion vessel *1 ————————
*1 Supplied with UK model ONLY. Please refer to PAC-WK01UK-E Installation Manual for more information on accessories.
*2 Attachment the part to the position of 3 bar PRV for E*ST20 series. (Refer to the Figure 3,2 and 3,3 on the manual of RG79F364H01(page 8))
*3 Attachment the part to the position of 3 bar PRV for E*ST30 series. (Refer to the Figure 3,2 and 3,3 on the manual of RG79F364H01(page 8))

10
OCH714A
No. Part name ERST20C-
VM2D
ERST30C-
VM2ED
EHPT17/20X-
*M*D
EHPT20/30X-
*M*ED
EHPT20/30X-
MED
ERPT17/20X-
*M*D
ERPT20X-
MD
ERPT30X-
VM2ED
EHPT20X-
MHEDW
A DHW outlet pipe
B Cold water inlet pipe
C Water pipe (Space heating/cooling return connection)
D Water pipe (Space heating/cooling ow connection)
E Water pipe (Flow from heat pump connection) — —
F Water pipe (Return to heat pump connection) — —
G Refrigerant pipe (Gas) — — — — — — —
H Refrigerant pipe (Liquid) ———————
1Control and electrical box
2 Main remote controller
3Plate heat exchanger (Refrigerant - Water) ———————
4 Booster heater 1,2 — — —
5 3-way valve
6 Drain cock (Primary circuit)
7 Manometer
8 Pressure relief valve (3 bar) *2 *3 — — — — — — —
9 Automatic air vent
10 Expansion vessel (Primary circuit) — — — — —
11 Flow sensor
12 Strainer valve
13 Water circulation pump 1 (Primary circuit)
14 Pump valve
15 DHW tank
16 Plate heat exchanger (Water - Water)
17 Scale trap
18 Water circulation pump (Sanitary circuit)
19 Immersion heater — — — — — — — —
20 Temperature and pressure relief valve — — — — — — — —
21 Pressure relief valve (10 bar) (DHW Tank) —
22 Drain cock (DHW tank)
23 Drain cock (Sanitary circuit)
24 Flow water temp. thermistor (THW1)
25 Return water temp. thermistor (THW2)
26 DHW tank upper water temp. thermistor (THW5A)
27 DHW tank lower water temp. thermistor (THW5B)
28 Refrigerant liquid temp. thermistor (TH2) — — — — — — —
29 Pressure sensor — — — — — — — — —
30 Drain pan — — — —
31 Outdoor unit — — — — — — — — —
32 Drain pipe (Local supply) — — — — — — — — —
33 Back ow prevention device (Local supply) —————————
34 Isolating valve (Local supply) — — — — — — — — —
35 Magnetic lter (Local supply) (Recommended) —————————
36 Strainer (Local supply) — — — — — — — — —
37 Additional PRV (Local supply) — — — — — — — — —
38 Inlet control group *1 — — — — — — — — —
39
Filling loop (Ball valves, check valves and exible hose) *1 —————————
40 Potable expansion vessel *1 —————————
*1 Supplied with UK model ONLY. Please refer to PAC-WK01UK-E Installation Manual for more information on accessories.
*2 Attachment the part to the position of 3 bar PRV for E*ST20 series. (Refer to the Figure 3,2 and 3,3 on the manual of RG79F364H01(page 8))
*3 Attachment the part to the position of 3 bar PRV for E*ST30 series. (Refer to the Figure 3,2 and 3,3 on the manual of RG79F364H01(page 8))
<Table 4.2>

11
OCH714A
100
±
20
680
595
120
±
20
456
1
120
G1/2
515.7
0
48 0
182.7
242.7 412.1 546.8 552.7
67.8
0
442.3
542.3
46.6
0
91.6
136.6 181.6 226.6
A
B
D
C
F
EJ
490 1560
1
PRESSURE
TEMPERATURE &
RELIEF VALVE
CPF 15mm
100
±
20
680
595
120
±
20
456
1
120
G1/2
515.7
0
48 0
182.7
242.7 412.1 546.8 552.7
67.8
0
442.3
542.3
46.6
0
91.6
136.6 181.6 226.6
A
B
D
C
F
EJ
490 1560
1
OUTLINES AND DIMENSIONS
5
5-1. Technical Drawings
<E**T***-*M**D>
(Packaged model system)
HANDLE AIR VENT
MANOMETER
MAIN
CONTROLLER
FRONT
PANEL
TERMINAL
BLOCK
PRESSURE
RELIEF VALVE
(SANITARY CIRCUIT)
DHW tank
capacity 170L 200L 300L
11400 1600 2050
HANDLE
AIR VENT
MANOMETER
MAIN
CONTROLLER
FRONT
PANEL
TERMINAL
BLOCK
PRESSURE
RELIEF VALVE
(SANITARY CIRCUIT)
PRESSURE
RELIEF VALVE
(PRIMARY CIRCUIT)
(Split model system)
DHW tank
capacity 170L 200L 300L
11400 1600 2050 <E*ST30*-*M**D>
Letter Pipe description Connection size/type
A DHW outlet connection 22 mm/Compression
B Cold water inlet connection 22 mm/Compression
C Space heating/cooling RETURN connection 28 mm/Compression
D Space heating/cooling FLOW connection 28 mm/Compression
EFlow connection FROM heat pump (No plate heat exchanger) 28 mm/Compression
FReturn connection TO heat pump (No plate heat exchanger) 28 mm/Compression
GRefrigerant (GAS)
(With plate heat exchanger)
12.7 mm/Flare (E*ST**D-*)
15.88 mm/Flare (E*ST**C-*)
Warning
• Refrigerant pipes connection shall be accessible for main-
tenance purposes.
• In case of reconnecting the refrigerant pipes after detach-
ing, make the flared part of pipe re-fabricated.
HRefrigerant (LIQUID)
(With plate heat exchanger)
6.35 mm/Flare (E*ST**D-*)
9.52 mm/Flare (E*ST**C-*)
J
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 and ecodan Wi-Fi interface (option) cable, use inlet .
<Table 5.1>
1 2 3 4 5
<Unit: mm>
<E*PT30X-*M*ED>
<EHPT20X-MHEDW>

12
OCH714A
a
b b
d
Service access
5-2. Service access diagrams
Service access
Parameter Dimension (mm)
a 300*
b 150
c
(distance behind unit not visible
in the right gure)
10
d 500
Sufcient space MUST be left for the provision of discharge pipework as detailed
in National and Local Building Regulations.
The cylinder unit must be located indoors and in a frost-free environment, for
example in a utility room, to minimise heat loss from stored water.
* An additional 300 mm of space (total
600 mm) is required , when installing
the optional 2-zone kit (PAC-TZ02-E)
on top of the cylinder unit.

13
OCH714A
6WIRING DIAGRAM
6-1. E**T***-VM2(E)D
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve (AC motor)
(E*PT20/30X-*M**D*, E*ST**C-*M**D)
3-way valve (Stepping motor)
(EHPT17X-*M**D*, E*ST**D-*M**D)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
IHT
IH Immersion heater
IHC Contactor for immersion heater
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6
THW7 Thermistor (Zone1 return temp.)(Option)
THW8
THW9 Thermistor (Zone2 return temp.)(Option)
THW10 Thermistor (Mixing tank temp.)(Option)
THWB1
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11 Smart grid ready input (Local supply)
IN12
INA1 Flow sensor
FLOW TEMP. CONTROLLER (FTC)
TBO.1-4 Terminal block <Outputs>
TBI.1-6 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1-16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are, : connector, : terminal block. Function with asterisk (*) may not be available depending on model types.
2. Indoor unit and outdoor unit connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.
4. Refer to the installation manual for the water circulation diagrams of the models other than shown below.
Table 1 Signal Inputs
Name Terminal block Connector Item OFF (Open) ON (Short)
IN1 TBI.1 7-8 — Room thermostat
1 input *1
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
IN2 TBI.1 5-6 — Flow switch 1
input
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
IN3 TBI.1 3-4 — Flow switch 2
input (Zone1)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN4 TBI.1 1-2 — Demand control
input Normal Heat source OFF/
Boiler operation *3
IN5 TBI.2 7-8 — Outdoor thermo-
stat input *2
Standard opera-
tion
Heater operation/
Boiler operation *3
IN6 TBI.2 5-6 — Room thermostat
2 input *1
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
IN7 TBI.2 3-4 — Flow switch 3
input (Zone2)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN8 TBI.3 7-8 — Electric energy
meter 1
Refer to installation manual.
IN9 TBI.3 5-6 — Electric energy
meter 2
IN10 TBI.2 1-2 — Heat meter
IN11 TBI.3 3-4 — Smart grid ready
input
IN12 TBI.3 1-2 —
INA1 TBI.4 1-3 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the
heaters and related parts may be reduced.
*3. To turn on the boiler operation, use the main remote controller to select “Boiler” in
“External input setting” screen in the service menu.
Table 2 Outputs
Name Terminal block Connector Item OFF ON
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output
(Space heating/cooling & DHW) OFF ON
OUT2 TBO.1 3-4 — Water circulation pump 2 output
(Space heating/cooling for Zone1) OFF ON
OUT3 TBO.1 5-6 —
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1 OFF ON
2-way valve 2b output *2
OUT4
TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW
—
CN 851 3-way valve output
OUT5
TBO.2 1-2 — Mixing valve output *1 Stop Close
TBO.2 2-3 Open
OUT6 — CNBH 1-3 Booster heater 1 output OFF ON
OUT7 —
CNBH 5-7
Booster heater 2 output OFF ON
OUT8 TBO.4 7-8 — Cooling signal output OFF ON
OUT9 TBO.4 5-6 CNIH Immersion heater output OFF ON
OUT10 TBO.3 1-2 — Boiler output OFF ON
OUT11 TBO.3 5-6 — Error output Normal Error
OUT12 TBO.3 7-8 — Defrost output Normal Defrost
OUT13 TBO.4 3-4 — 2-way valve 2a output *2 OFF ON
OUT14 — CNP4 Water circulation pump 4 output
(DHW) OFF ON
OUT15 TBO.4 1-2 — Comp. ON signal OFF ON
OUT16 TBO.3 3-4 — Thermo ON signal OFF ON
OUTA1 TBI.4 7-8 — Analog output 0V-10V
Do not connect to the terminals that are indicated as “—” in the “T
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
1
2
CN22
(BU)
CN108
CN01
(BK)
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
3WV*
(
Stepping
motor)
1
5
CNRF
(WH)
Wireless receiver
(Option)
1
5
CN105
(RD)
WiFi adapter
(Option)
1
5
CNIT
(BU)
1
2
CN20
(RD)
1
3
CN21
(YE)
1
4
CNW12
(RD)
CNW5
(BU)
1
4
CN1A
(WH)
TBI.1
LED1
LED2
LED3
LED4
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
F1F2
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
3
1
7
1
3
1
3
CNBC
(GY)
CNBH
(WH)
CNBHT
(BK)
CNIH
(OG)
CNV1
(WH)
CNP4
(RD)
CNP1
(WH)
TBO.1
TBO.2
TBO.3
TBO.4
1
3
5
1
3
CNP4
(RD)
F1
F2
CN01
(BK)
TBO.1
X1
X2
X3
X14
1
3
3
CNPWM
(WH)
CNP1
(WH)1
3
M
1~
2WV2b
MP3
MP4
1
2
3
4
5
6
TBO.2
1
3
5
CNV1
(WH)
3WV *
(AC motor)
1
2
3
4
5
6
7
8
TBO.3
X4
X10
X16
X11
X12
TBO.4
1
2
3
4
5
6
7
8
X15
X13
X9
X8
Signal output
(Boiler)
Signal output
(thermo on)
Signal output
(Error)
Signal output
(Defrost)
Signal output
(Comp. on)
CNIH
(OG)2WV2a
1
3
1
3
1
3
1
7
X6
X7
CNBHT
(BK)
CNBC
(GY)
CNBH
(WH)
1
5
3
1
5
3
1
3
1
3
3
5
FTC board
X5B
X5A
MXV
Close
N
Open
MP2
MP1
M
1~
M
1~
TBI.2TBI.3TBI.4TBI.5TBI.6
12345678 12345678 12345678 12345678 12345678 12345678
1
2
3
4
5
6
3
5
1
4
CN401
(WH)
1
4
t° t° t°
12345678
IN4IN3IN2IN1
12345678
IN10IN7IN6IN5
12345678
IN12IN9IN8 IN11
12345678
OUTA1
1 4
Flow
Sensor
Pressure
Sensor *
CN1A
(WH)
12345678
t°
THW6 THW7 THW8 THW9
t° t°
12345678
THWB1 THW10
2 1
Main remote
controller
TBI.1 TBI.2 TBI.3 TBI.4 TBI.5TBI.6
CN20
(RD)
t°
CN21
(YE)
1 3 1 2
CNW12
(RD)
14
CNW5
(BU)
t°t°
TAB1
CN22
(BU)
THTH1TH2 *THW5BTHW5A
- + + -
V
- + - +
14
CN401
(WH)
14
t° t°t°
THW2THW1
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
NL S3S2S1
NL S3S2S1
To outdoor
unit
TB1
OG OG
YE
YE
GNYE
To outdoor
unit
Power supply
~/N 230V 50Hz
TB1
OG
BU
RD
BU
RD
YE
GNYE
1
3
1
3
OG
BN
OG
BN
Indoor unit powered
by independent source
Indoor unit powered
via outdoor unit
CIRCUIT BREAKER
1
3
5
CN3C
(BU)
CN3C
(BU)
CN01
(BK)
OG
YE
1
3
5
CN01
(BK)
WH WH
2 2
2
ECB1
L
(1)
N
(3)
BHCP
BU
BU
RD
WH/No.2 WH/No.1
RD
VT VT
GY GY
BHC1
BHT
642
531 A1
A2
BH1
BHF
24
Power supply
to Booster heater
~/N 230V 50Hz
642
531 A1
A2
CNBH
(WH)
CNBHT
(BK)
2
2
2CNBC
(GY)
1
1
3
3
1
3
<How to use TBO.1 to 4>
Tool
Tool
Conductor Conductor
Outline view Top view
Connect them using either way as shown below.

14
OCH714A
6-2. E**T***-VM6(E)D
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve (AC motor)
(E*PT20/30X-*M**D*, E*ST**C-*M**D)
3-way valve (Stepping motor)
(EHPT17X-*M**D*, E*ST**D-*M**D)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
IHT
IH Immersion heater
IHC Contactor for immersion heater
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6
THW7 Thermistor (Zone1 return temp.)(Option)
THW8
THW9 Thermistor (Zone2 return temp.)(Option)
THW10 Thermistor (Mixing tank temp.)(Option)
THWB1
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11 Smart grid ready input (Local supply)
IN12
INA1 Flow sensor
FLOW TEMP. CONTROLLER (FTC)
TBO.1-4 Terminal block <Outputs>
TBI.1-6 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1-16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are, : connector, : terminal block. Function with asterisk (*) may not be available depending on model types.
2. Indoor unit and outdoor unit connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.
4. Refer to the installation manual for the water circulation diagrams of the models other than shown below.
Table 1 Signal Inputs
Name Terminal block Connector Item OFF (Open) ON (Short)
IN1 TBI.1 7-8 — Room thermostat
1 input *1
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
IN2 TBI.1 5-6 — Flow switch 1
input
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
IN3 TBI.1 3-4 — Flow switch 2
input (Zone1)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN4 TBI.1 1-2 — Demand control
input Normal Heat source OFF/
Boiler operation *3
IN5 TBI.2 7-8 — Outdoor thermo-
stat input *2
Standard opera-
tion
Heater operation/
Boiler operation *3
IN6 TBI.2 5-6 — Room thermostat
2 input *1
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
IN7 TBI.2 3-4 — Flow switch 3
input (Zone2)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN8 TBI.3 7-8 — Electric energy
meter 1
Refer to installation manual.
IN9 TBI.3 5-6 — Electric energy
meter 2
IN10 TBI.2 1-2 — Heat meter
IN11 TBI.3 3-4 — Smart grid ready
input
IN12 TBI.3 1-2 —
INA1 TBI.4 1-3 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the
heaters and related parts may be reduced.
*3. To turn on the boiler operation, use the main remote controller to select “Boiler” in
“External input setting” screen in the service menu.
Table 2 Outputs
Name Terminal block Connector Item OFF ON
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output
(Space heating/cooling & DHW) OFF ON
OUT2 TBO.1 3-4 — Water circulation pump 2 output
(Space heating/cooling for Zone1) OFF ON
OUT3 TBO.1 5-6 —
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1 OFF ON
2-way valve 2b output *2
OUT4
TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW
—
CN 851 3-way valve output
OUT5
TBO.2 1-2 — Mixing valve output *1 Stop Close
TBO.2 2-3 Open
OUT6 — CNBH 1-3 Booster heater 1 output OFF ON
OUT7 —
CNBH 5-7
Booster heater 2 output OFF ON
OUT8 TBO.4 7-8 — Cooling signal output OFF ON
OUT9 TBO.4 5-6 CNIH Immersion heater output OFF ON
OUT10 TBO.3 1-2 — Boiler output OFF ON
OUT11 TBO.3 5-6 — Error output Normal Error
OUT12 TBO.3 7-8 — Defrost output Normal Defrost
OUT13 TBO.4 3-4 — 2-way valve 2a output *2 OFF ON
OUT14 — CNP4 Water circulation pump 4 output
(DHW) OFF ON
OUT15 TBO.4 1-2 — Comp. ON signal OFF ON
OUT16 TBO.3 3-4 — Thermo ON signal OFF ON
OUTA1 TBI.4 7-8 — Analog output 0V-10V
Do not connect to the terminals that are indicated as “—” in the “T
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
1
2
CN22
(BU)
CN108
CN01
(BK)
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
3WV*
(
Stepping
motor)
1
5
CNRF
(WH)
Wireless receiver
(Option)
1
5
CN105
(RD)
WiFi adapter
(Option)
1
5
CNIT
(BU)
1
2
CN20
(RD)
1
3
CN21
(YE)
1
4
CNW12
(RD)
CNW5
(BU)
1
4
CN1A
(WH)
TBI.1
LED1
LED2
LED3
LED4
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
F1F2
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
3
1
7
1
3
1
3
CNBC
(GY)
CNBH
(WH)
CNBHT
(BK)
CNIH
(OG)
CNV1
(WH)
CNP4
(RD)
CNP1
(WH)
TBO.1
TBO.2
TBO.3
TBO.4
1
3
5
1
3
CNP4
(RD)
F1
F2
CN01
(BK)
TBO.1
X1
X2
X3
X14
1
3
3
CNPWM
(WH)
CNP1
(WH)1
3
M
1~
2WV2b
MP3
MP4
1
2
3
4
5
6
TBO.2
1
3
5
CNV1
(WH)
3WV *
(AC motor)
1
2
3
4
5
6
7
8
TBO.3
X4
X10
X16
X11
X12
TBO.4
1
2
3
4
5
6
7
8
X15
X13
X9
X8
Signal output
(Boiler)
Signal output
(thermo on)
Signal output
(Error)
Signal output
(Defrost)
Signal output
(Comp. on)
CNIH
(OG)2WV2a
1
3
1
3
1
3
1
7
X6
X7
CNBHT
(BK)
CNBC
(GY)
CNBH
(WH)
1
5
3
1
5
3
1
3
1
3
3
5
FTC board
X5B
X5A
MXV
Close
N
Open
MP2
MP1
M
1~
M
1~
TBI.2TBI.3TBI.4TBI.5TBI.6
12345678 12345678 12345678 12345678 12345678 12345678
1
2
3
4
5
6
3
5
1
4
CN401
(WH)
1
4
t° t° t°
12345678
IN4IN3IN2IN1
12345678
IN10IN7IN6IN5
12345678
IN12IN9IN8 IN11
12345678
OUTA1
1 4
Flow
Sensor
Pressure
Sensor *
CN1A
(WH)
12345678
t°
THW6 THW7 THW8 THW9
t° t°
12345678
THWB1 THW10
2 1
Main remote
controller
TBI.1 TBI.2 TBI.3 TBI.4 TBI.5TBI.6
CN20
(RD)
t°
CN21
(YE)
1 3 1 2
CNW12
(RD)
14
CNW5
(BU)
t°t°
TAB1
CN22
(BU)
THTH1TH2 *THW5BTHW5A
- + + -
V
- + - +
14
CN401
(WH)
14
t° t°t°
THW2THW1
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
NL S3S2S1
NL S3S2S1
To outdoor
unit
TB1
OG OG
YE
YE
GNYE
To outdoor
unit
Power supply
~/N 230V 50Hz
TB1
OG
BU
RD
BU
RD
YE
GNYE
1
3
1
3
OG
BN
OG
BN
Indoor unit powered
by independent source
Indoor unit powered
via outdoor unit
CIRCUIT BREAKER
1
3
5
CN3C
(BU)
CN3C
(BU)
CN01
(BK)
OG
YE
1
3
5
CN01
(BK)
WH WH
2 2 2
2
ECB1
L
(1)
N
(3)
BHCP
BU
BU
BU
RDRD
BU/No.3
WH/No.2 WH/No.1
BU/No.4
RD
VT VT
PK
PK
GY GY
BHC2
BHC1
BHT
642
531 A1
A2
642
531 A1
A2
BH1
BHF
BH2
24
Power supply
to Booster heater
~/N 230V 50Hz
642
531 A1
A2
CNBH
(WH)
CNBHT
(BK)
2
2
2
2CNBC
(GY)
1
1
3
5
7
3
1
3
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.

15
OCH714A
6-3. EH*T***-YM9(E)D
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve (AC motor)
(E*PT20/30X-*M**D*, E*ST**C-*M**D)
3-way valve (Stepping motor)
(EHPT17X-*M**D*, E*ST**D-*M**D)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
IHT
IH Immersion heater
IHC Contactor for immersion heater
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6
THW7 Thermistor (Zone1 return temp.)(Option)
THW8
THW9 Thermistor (Zone2 return temp.)(Option)
THW10 Thermistor (Mixing tank temp.)(Option)
THWB1
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11 Smart grid ready input (Local supply)
IN12
INA1 Flow sensor
FLOW TEMP. CONTROLLER (FTC)
TBO.1-4 Terminal block <Outputs>
TBI.1-6 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1-16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are, : connector, : terminal block. Function with asterisk (*) may not be available depending on model types.
2. Indoor unit and outdoor unit connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.
4. Refer to the installation manual for the water circulation diagrams of the models other than shown below.
Table 1 Signal Inputs
Name Terminal block Connector Item OFF (Open) ON (Short)
IN1 TBI.1 7-8 — Room thermostat
1 input *1
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
IN2 TBI.1 5-6 — Flow switch 1
input
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
IN3 TBI.1 3-4 — Flow switch 2
input (Zone1)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN4 TBI.1 1-2 — Demand control
input Normal Heat source OFF/
Boiler operation *3
IN5 TBI.2 7-8 — Outdoor thermo-
stat input *2
Standard opera-
tion
Heater operation/
Boiler operation *3
IN6 TBI.2 5-6 — Room thermostat
2 input *1
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
IN7 TBI.2 3-4 — Flow switch 3
input (Zone2)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN8 TBI.3 7-8 — Electric energy
meter 1
Refer to installation manual.
IN9 TBI.3 5-6 — Electric energy
meter 2
IN10 TBI.2 1-2 — Heat meter
IN11 TBI.3 3-4 — Smart grid ready
input
IN12 TBI.3 1-2 —
INA1 TBI.4 1-3 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the
heaters and related parts may be reduced.
*3. To turn on the boiler operation, use the main remote controller to select “Boiler” in
“External input setting” screen in the service menu.
Table 2 Outputs
Name Terminal block Connector Item OFF ON
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output
(Space heating/cooling & DHW) OFF ON
OUT2 TBO.1 3-4 — Water circulation pump 2 output
(Space heating/cooling for Zone1) OFF ON
OUT3 TBO.1 5-6 —
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1 OFF ON
2-way valve 2b output *2
OUT4
TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW
—
CN 851 3-way valve output
OUT5
TBO.2 1-2 — Mixing valve output *1 Stop Close
TBO.2 2-3 Open
OUT6 — CNBH 1-3 Booster heater 1 output OFF ON
OUT7 —
CNBH 5-7
Booster heater 2 output OFF ON
OUT8 TBO.4 7-8 — Cooling signal output OFF ON
OUT9 TBO.4 5-6 CNIH Immersion heater output OFF ON
OUT10 TBO.3 1-2 — Boiler output OFF ON
OUT11 TBO.3 5-6 — Error output Normal Error
OUT12 TBO.3 7-8 — Defrost output Normal Defrost
OUT13 TBO.4 3-4 — 2-way valve 2a output *2 OFF ON
OUT14 — CNP4 Water circulation pump 4 output
(DHW) OFF ON
OUT15 TBO.4 1-2 — Comp. ON signal OFF ON
OUT16 TBO.3 3-4 — Thermo ON signal OFF ON
OUTA1 TBI.4 7-8 — Analog output 0V-10V
Do not connect to the terminals that are indicated as “—” in the “T
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
1
2
CN22
(BU)
CN108
CN01
(BK)
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
3WV*
(
Stepping
motor)
1
5
CNRF
(WH)
Wireless receiver
(Option)
1
5
CN105
(RD)
WiFi adapter
(Option)
1
5
CNIT
(BU)
1
2
CN20
(RD)
1
3
CN21
(YE)
1
4
CNW12
(RD)
CNW5
(BU)
1
4
CN1A
(WH)
TBI.1
LED1
LED2
LED3
LED4
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
F1F2
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
3
1
7
1
3
1
3
CNBC
(GY)
CNBH
(WH)
CNBHT
(BK)
CNIH
(OG)
CNV1
(WH)
CNP4
(RD)
CNP1
(WH)
TBO.1
TBO.2
TBO.3
TBO.4
1
3
5
1
3
CNP4
(RD)
F1
F2
CN01
(BK)
TBO.1
X1
X2
X3
X14
1
3
3
CNPWM
(WH)
CNP1
(WH)1
3
M
1~
2WV2b
MP3
MP4
1
2
3
4
5
6
TBO.2
1
3
5
CNV1
(WH)
3WV *
(AC motor)
1
2
3
4
5
6
7
8
TBO.3
X4
X10
X16
X11
X12
TBO.4
1
2
3
4
5
6
7
8
X15
X13
X9
X8
Signal output
(Boiler)
Signal output
(thermo on)
Signal output
(Error)
Signal output
(Defrost)
Signal output
(Comp. on)
CNIH
(OG)2WV2a
1
3
1
3
1
3
1
7
X6
X7
CNBHT
(BK)
CNBC
(GY)
CNBH
(WH)
1
5
3
1
5
3
1
3
1
3
3
5
FTC board
X5B
X5A
MXV
Close
N
Open
MP2
MP1
M
1~
M
1~
TBI.2TBI.3TBI.4TBI.5TBI.6
12345678 12345678 12345678 12345678 12345678 12345678
1
2
3
4
5
6
3
5
1
4
CN401
(WH)
1
4
t° t° t°
12345678
IN4IN3IN2IN1
12345678
IN10IN7IN6IN5
12345678
IN12IN9IN8 IN11
12345678
OUTA1
1 4
Flow
Sensor
CN1A
(WH)
12345678
t°
THW6 THW7 THW8 THW9
t° t°
12345678
THWB1 THW10
2 1
Main remote
controller
TBI.1 TBI.2 TBI.3 TBI.4 TBI.5TBI.6
CN20
(RD)
t°
CN21
(YE)
1 3 1 2
CNW12
(RD)
14
CNW5
(BU)
t°t°
TAB1
CN22
(BU)
THTH1TH2 *THW5BTHW5A
- + + -
V
- + - +
14
CN401
(WH)
14
t° t°t°
THW2THW1
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
NL
S3S2S1
NL S3S2S1
To outdoor
unit
TB1
OG OG
YE
YE
GNYE
To outdoor
unit
Power supply
~/N 230V 50Hz
TB1
OG
BU
RD
BU
RD
YE
GNYE
1
3
1
3
OG
BN
OG
BN
Indoor unit powered
by independent source
Indoor unit powered
via outdoor unit
CIRCUIT BREAKER
1
3
5
CN3C
(BU)
CN3C
(BU)
CN01
(BK)
OG
YE
1
3
5
CN01
(BK)
L1
(1) L2 (3) L3 (5)
42
WH
RD
31 5
BK
6
42 6
WH
RD
BK
A1
A2
31 5
WH
RD
BK
ECB1
BHCP
A1
42 6 A2 42 6 A2
31 5 A1
WH/No.1 WH/No.2
VT VT
BHC2BHC1
PK
PK
GY GY
BH1 BH2
BHTBHF
θ
1
3
1
3
1
7
CNBH
(WH)
CNBC
(GY)
CNBHT
(BK)
2
2
2
2
2
2
WH WH
Power supply
to Booster heater
3~ 400V 50Hz
3
5
2 2
WH/No.3
BU/No.4 BU/No.5 BU/No.6
Pressure Sensor *
<How to use TBO.1 to 4>
Tool
Tool
Conductor Conductor
Outline view Top view
Connect them using either way as shown below.

16
OCH714A
6-4. E**T***-M(E)D
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve (AC motor)
(E*PT20/30X-*M**D*, E*ST**C-*M**D)
3-way valve (Stepping motor)
(EHPT17X-*M**D*, E*ST**D-*M**D)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
IHT
IH Immersion heater
IHC Contactor for immersion heater
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6
THW7 Thermistor (Zone1 return temp.)(Option)
THW8
THW9 Thermistor (Zone2 return temp.)(Option)
THW10 Thermistor (Mixing tank temp.)(Option)
THWB1
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11 Smart grid ready input (Local supply)
IN12
INA1 Flow sensor
FLOW TEMP. CONTROLLER (FTC)
TBO.1-4 Terminal block <Outputs>
TBI.1-6 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1-16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are, : connector, : terminal block. Function with asterisk (*) may not be available depending on model types.
2. Indoor unit and outdoor unit connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.
4. Refer to the installation manual for the water circulation diagrams of the models other than shown below.
Table 1 Signal Inputs
Name Terminal block
Connector
Item OFF (Open) ON (Short)
IN1 TBI.1 7-8 — Room thermostat
1 input *1
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
IN2 TBI.1 5-6 — Flow switch 1
input
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
IN3 TBI.1 3-4 — Flow switch 2
input (Zone1)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN4 TBI.1 1-2 — Demand control
input Normal Heat source OFF/
Boiler operation *3
IN5 TBI.2 7-8 — Outdoor thermo-
stat input *2
Standard opera-
tion
Heater operation/
Boiler operation *3
IN6 TBI.2 5-6 — Room thermostat
2 input *1
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
IN7 TBI.2 3-4 — Flow switch 3
input (Zone2)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN8 TBI.3 7-8 — Electric energy
meter 1
Refer to installation manual.
IN9 TBI.3 5-6 — Electric energy
meter 2
IN10 TBI.2 1-2 — Heat meter
IN11 TBI.3 3-4 — Smart grid ready
input
IN12 TBI.3 1-2 —
INA1 TBI.4 1-3 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the
heaters and related parts may be reduced.
*3. To turn on the boiler operation, use the main remote controller to select “Boiler” in
“External input setting” screen in the service menu.
Table 2 Outputs
Name Terminal block Connector Item OFF ON
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output
(Space heating/cooling & DHW) OFF ON
OUT2 TBO.1 3-4 — Water circulation pump 2 output
(Space heating/cooling for Zone1) OFF ON
OUT3 TBO.1 5-6 —
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1 OFF ON
2-way valve 2b output *2
OUT4
TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW
—
CN 851 3-way valve output
OUT5
TBO.2 1-2 — Mixing valve output *1 Stop Close
TBO.2 2-3 Open
OUT6 — CNBH 1-3 Booster heater 1 output OFF ON
OUT7 — CNBH 5-7 Booster heater 2 output OFF ON
OUT8 TBO.4 7-8 — Cooling signal output OFF ON
OUT9 TBO.4 5-6 CNIH Immersion heater output OFF ON
OUT10 TBO.3 1-2 — Boiler output OFF ON
OUT11 TBO.3 5-6 — Error output Normal Error
OUT12 TBO.3 7-8 — Defrost output Normal Defrost
OUT13 TBO.4 3-4 — 2-way valve 2a output *2 OFF ON
OUT14 — CNP4 Water circulation pump 4 output
(DHW) OFF ON
OUT15 TBO.4 1-2 — Comp. ON signal OFF ON
OUT16 TBO.3 3-4 — Thermo ON signal OFF ON
OUTA1 TBI.4 7-8 — Analog output 0V-10V
Do not connect to the terminals that are indicated as “—” in the “T
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
1
2
CN22
(BU)
CN108
CN01
(BK)
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
3WV*
(
Stepping
motor)
1
5
CNRF
(WH)
Wireless receiver
(Option)
1
5
CN105
(RD)
WiFi adapter
(Option)
1
5
CNIT
(BU)
1
2
CN20
(RD)
1
3
CN21
(YE)
1
4
CNW12
(RD)
CNW5
(BU)
1
4
CN1A
(WH)
TBI.1
LED1
LED2
LED3
LED4
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
F1F2
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
3
1
7
1
3
1
3
CNBC
(GY)
CNBH
(WH)
CNBHT
(BK)
CNIH
(OG)
CNV1
(WH)
CNP4
(RD)
CNP1
(WH)
TBO.1
TBO.2
TBO.3
TBO.4
1
3
5
1
3
CNP4
(RD)
F1
F2
CN01
(BK)
TBO.1
X1
X2
X3
X14
1
3
3
CNPWM
(WH)
CNP1
(WH)1
3
M
1~
2WV2b
MP3
MP4
1
2
3
4
5
6
TBO.2
1
3
5
CNV1
(WH)
3WV *
(AC motor)
1
2
3
4
5
6
7
8
TBO.3
X4
X10
X16
X11
X12
TBO.4
1
2
3
4
5
6
7
8
X15
X13
X9
X8
Signal output
(Boiler)
Signal output
(thermo on)
Signal output
(Error)
Signal output
(Defrost)
Signal output
(Comp. on)
CNIH
(OG)2WV2a
1
3
1
3
1
3
1
7
X6
X7
CNBHT
(BK)
CNBC
(GY)
CNBH
(WH)
1
5
3
1
5
3
1
3
1
3
3
5
FTC board
X5B
X5A
MXV
Close
N
Open
MP2
MP1
M
1~
M
1~
TBI.2TBI.3TBI.4TBI.5TBI.6
12345678 12345678 12345678 12345678 12345678 12345678
1
2
3
4
5
6
3
5
1
4
CN401
(WH)
1
4
t° t° t°
12345678
IN4IN3IN2IN1
12345678
IN10IN7IN6IN5
12345678
IN12IN9IN8 IN11
12345678
OUTA1
1 4
Flow
Sensor
CN1A
(WH)
12345678
t°
THW6 THW7 THW8 THW9
t° t°
12345678
THWB1 THW10
2 1
Main remote
controller
TBI.1 TBI.2 TBI.3 TBI.4 TBI.5TBI.6
CN20
(RD)
t°
CN21
(YE)
1 3 1 2
CNW12
(RD)
14
CNW5
(BU)
t°t°
TAB1
CN22
(BU)
THTH1TH2 *THW5BTHW5A
- + + -
V
- + - +
14
CN401
(WH)
14
t° t°t°
THW2THW1
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
NL S3S2S1
NL S3S2S1
To outdoor
unit
TB1
OG OG
YE
YE
GNYE
To outdoor
unit
Power supply
~/N 230V 50Hz
TB1
OG
BU
RD
BU
RD
YE
GNYE
1
3
1
3
OG
BN
OG
BN
Indoor unit powered
by independent source
Indoor unit powered
via outdoor unit
CIRCUIT BREAKER
1
3
5
CN3C
(BU)
CN3C
(BU)
CN01
(BK)
OG
YE
1
3
5
CN01
(BK)
Pressure Sensor *
<How to use TBO.1 to 4>
Tool
Tool
Conductor Conductor
Outline view Top view
Connect them using either way as shown below.

17
OCH714A
6-5. EH*T***-TM9(E)D
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2
(Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve (AC motor)
(E*PT20/30X-*M**D*, E*ST**C-*M**D)
3-way valve (Stepping motor)
(EHPT17X-*M**D*, E*ST**D-*M**D)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
IHT
IH Immersion heater
IHC Contactor for immersion heater
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6
THW7 Thermistor (Zone1 return temp.)(Option)
THW8
THW9 Thermistor (Zone2 return temp.)(Option)
THW10 Thermistor (Mixing tank temp.)(Option)
THWB1
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11 Smart grid ready input (Local supply)
IN12
INA1 Flow sensor
FLOW TEMP. CONTROLLER (FTC)
TBO.1-4 Terminal block <Outputs>
TBI.1-6 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1-16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are, : connector, : terminal block. Function with asterisk (*) may not be available depending on model types.
2. Indoor unit and outdoor unit connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor unit side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for service.
4. Refer to the installation manual for the water circulation diagrams of the models other than shown below.
Table 1 Signal Inputs
Name Terminal block Connector Item OFF (Open) ON (Short)
IN1 TBI.1 7-8 — Room thermostat
1 input *1
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
IN2 TBI.1 5-6 — Flow switch 1
input
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
IN3 TBI.1 3-4 — Flow switch 2
input (Zone1)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN4 TBI.1 1-2 — Demand control
input Normal Heat source OFF/
Boiler operation *3
IN5 TBI.2 7-8 — Outdoor thermo-
stat input *2
Standard opera-
tion
Heater operation/
Boiler operation *3
IN6 TBI.2 5-6 — Room thermostat
2 input *1
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
IN7 TBI.2 3-4 — Flow switch 3
input (Zone2)
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
IN8 TBI.3 7-8 — Electric energy
meter 1
Refer to installation manual.
IN9 TBI.3 5-6 — Electric energy
meter 2
IN10 TBI.2 1-2 — Heat meter
IN11 TBI.3 3-4 — Smart grid ready
input
IN12 TBI.3 1-2 —
INA1 TBI.4 1-3 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the
heaters and related parts may be reduced.
*3. To turn on the boiler operation, use the main remote controller to select “Boiler” in
“External input setting” screen in the service menu.
Table 2 Outputs
Name Terminal block Connector Item OFF ON
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output
(Space heating/cooling & DHW) OFF ON
OUT2 TBO.1 3-4 — Water circulation pump 2 output
(Space heating/cooling for Zone1) OFF ON
OUT3 TBO.1 5-6 —
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1 OFF ON
2-way valve 2b output *2
OUT4
TBO.2 4-6 CNV1 3-way valve (2-way valve) output Heating DHW
—
CN 851 3-way valve output
OUT5
TBO.2 1-2 — Mixing valve output *1 Stop Close
TBO.2 2-3 Open
OUT6 — CNBH 1-3 Booster heater 1 output OFF ON
OUT7 —
CNBH 5-7
Booster heater 2 output OFF ON
OUT8 TBO.4 7-8 — Cooling signal output OFF ON
OUT9 TBO.4 5-6 CNIH Immersion heater output OFF ON
OUT10 TBO.3 1-2 — Boiler output OFF ON
OUT11 TBO.3 5-6 — Error output Normal Error
OUT12 TBO.3 7-8 — Defrost output Normal Defrost
OUT13 TBO.4 3-4 — 2-way valve 2a output *2 OFF ON
OUT14 — CNP4 Water circulation pump 4 output
(DHW) OFF ON
OUT15 TBO.4 1-2 — Comp. ON signal OFF ON
OUT16 TBO.3 3-4 — Thermo ON signal OFF ON
OUTA1 TBI.4 7-8 — Analog output 0V-10V
Do not connect to the terminals that are indicated as “—” in the “T
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
1
2
CN22
(BU)
CN108
CN01
(BK)
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
3WV*
(
Stepping
motor)
1
5
CNRF
(WH)
Wireless receiver
(Option)
1
5
CN105
(RD)
WiFi adapter
(Option)
1
5
CNIT
(BU)
1
2
CN20
(RD)
1
3
CN21
(YE)
1
4
CNW12
(RD)
CNW5
(BU)
1
4
CN1A
(WH)
TBI.1
LED1
LED2
LED3
LED4
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
F1F2
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
3
1
7
1
3
1
3
CNBC
(GY)
CNBH
(WH)
CNBHT
(BK)
CNIH
(OG)
CNV1
(WH)
CNP4
(RD)
CNP1
(WH)
TBO.1
TBO.2
TBO.3
TBO.4
1
3
5
1
3
CNP4
(RD)
F1
F2
CN01
(BK)
TBO.1
X1
X2
X3
X14
1
3
3
CNPWM
(WH)
CNP1
(WH)1
3
M
1~
2WV2b
MP3
MP4
1
2
3
4
5
6
TBO.2
1
3
5
CNV1
(WH)
3WV *
(AC motor)
1
2
3
4
5
6
7
8
TBO.3
X4
X10
X16
X11
X12
TBO.4
1
2
3
4
5
6
7
8
X15
X13
X9
X8
Signal output
(Boiler)
Signal output
(thermo on)
Signal output
(Error)
Signal output
(Defrost)
Signal output
(Comp. on)
CNIH
(OG)2WV2a
1
3
1
3
1
3
1
7
X6
X7
CNBHT
(BK)
CNBC
(GY)
CNBH
(WH)
1
5
3
1
5
3
1
3
1
3
3
5
FTC board
X5B
X5A
MXV
Close
N
Open
MP2
MP1
M
1~
M
1~
TBI.2TBI.3TBI.4TBI.5TBI.6
12345678 12345678 12345678 12345678 12345678 12345678
1
2
3
4
5
6
3
5
1
4
CN401
(WH)
1
4
t° t° t°
12345678
IN4IN3IN2IN1
12345678
IN10IN7IN6IN5
12345678
IN12IN9IN8 IN11
12345678
OUTA1
1 4
Flow
Sensor
CN1A
(WH)
12345678
t°
THW6 THW7 THW8 THW9
t° t°
12345678
THWB1 THW10
2 1
Main remote
controller
TBI.1 TBI.2 TBI.3 TBI.4 TBI.5TBI.6
CN20
(RD)
t°
CN21
(YE)
1 3 1 2
CNW12
(RD)
14
CNW5
(BU)
t°t°
TAB1
CN22
(BU)
THTH1TH2 *THW5BTHW5A
- + + -
V
- + - +
14
CN401
(WH)
14
t° t°t°
THW2THW1
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
NL S3S2S1
NL
S3S2S1
To outdoor
unit
TB1
OG OG
YE
YE
GNYE
To outdoor
unit
Power supply
~/N 230V 50Hz
TB1
OG
BU
RD
BU
RD
YE
GNYE
1
3
1
3
OG
BN
OG
BN
Indoor unit powered
by independent source
Indoor unit powered
via outdoor unit
CIRCUIT BREAKER
1
3
5
CN3C
(BU)
CN3C
(BU)
CN01
(BK)
OG
YE
1
3
5
CN01
(BK)
L1
(1) L2 (3) L3 (5)
42
WH
RD
31 5
BK
6
42 6
WH
RD
BK
A1
A2
31 5
WH
RD
BK
ECB1
BHCP
A1
42 6 A2 42 6 A2
31 5 A1
WH/No.1 WH/No.2
VT VT
BHC2BHC1
PK
PK
GY GY
BH1 BH2
BHTBHF
θ
1
3
1
3
1
7
CNBH
(WH)
CNBC
(GY)
CNBHT
(BK)
2
2
2
2
2
2
WH WH
Power supply
to Booster heater
3~ 230V 50Hz
3
5
2 2
WH/No.3
BU/No.4 BU/No.5 BU/No.6
Pressure
Sensor *
<How to use TBO.1 to 4>
Tool
Tool
Conductor Conductor
Outline view Top view
Connect them using either way as shown below.

18
OCH714A
6-6. DIP Switch Functions
The DIP switch number is printed on the circuit board next to the relevant switch-
es. The word ON is printed on the circuit board and on the DIP switch block itself.
To move the switch you will need to use a pin or the corner of a thin metal ruler or
similar.
DIP switch settings are listed below in Table 6.6.1.
Only an authorised installer can change DIP switch setting under one's own re-
sponsibility according to the installation condition.
Make sure to turn off both indoor unit and outdoor unit power supplies before
changing the switch settings.
DIP switch Function OFF ON Default settings:
Indoor unit model
SW1 SW1-1 Boiler WITHOUT Boiler WITH Boiler OFF
SW1-2 Heat pump maximum outlet water temperature 55ºC 60ºC ON *1
SW1-3 DHW tank WITHOUT DHW tank WITH DHW tank ON
SW1-4 Immersion heater WITHOUT Immersion heater WITH Immersion heater
OFF: Except
EHPT20X-MHEDW
ON : EHPT20X-MHEDW
SW1-5 Booster heater WITHOUT Booster heater WITH Booster heater
OFF: E**T***-M*ED*
ON : E**T***-*M 2/6/9*D
SW1-6 Booster heater function For heating only For heating and DHW
OFF: E**T***-M*ED*
ON : E**T***-*M 2/6/9*D
SW1-7 Outdoor unit type Split type Packaged type
OFF: E*ST***-*M**D
ON
: E*PT**X-*M**D*
SW1-8 Wireless remote controller WITHOUT Wireless remote controller WITH Wireless remote controller OFF
SW2 SW2-1 Room thermostat1 input (IN1) logic change
Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open OFF
SW2-2 Flow switch1 input (IN2) logic change Failure detection at short Failure detection at open OFF
SW2-3 Booster heater capacity restriction Inactive Active
OFF: Except
E**T***-VM2*D
ON : E**T***-VM2*D
SW2-4 Cooling mode function Inactive Active OFF: EH*T***-*M**D*
ON :
ER*T***-*M**D
SW2-5 Automatic switch to backup heat source opera-
tion (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 *3 OFF
SW2-8 Flow sensor WITHOUT Flow sensor WITH Flow sensor ON
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 and 3 input logic change Failure detection at short Failure detection at open OFF
SW3-3 3-way valve type AC motor Stepping motor
OFF:E*PT20/30X-M**D*
E*ST**C/30D-*M**D
ON :E*PT17X-*M**D*
E*ST17/20D-*M**D
SW3-4 Electric energy meter WITHOUT Electric energy meter WITH Electric energy meter OFF
SW3-5 Heating mode function *4 Inactive Active ON
SW3-6 2-zone valve ON/OFF control Inactive Active OFF
SW3-7 Heat exchanger for DHW Coil in tank External plate HEX ON
SW3-8 Heat meter WITHOUT Heat meter WITH Heat meter OFF
SW4 SW4-1 — — — OFF
SW4-2 — — — OFF
SW4-3 — — — OFF
SW4-4
Indoor unit only operation (during installation work) *5 Inactive Active OFF
SW4-5 Emergency mode (Heater only operation) Normal
Emergency mode (Heater only operation) OFF *6
SW4-6 Emergency mode (Boiler operation) Normal Emergency mode (Boiler operation) OFF *6
SW5 SW5-1 — — — OFF
SW5-2 Advanced auto adaptation Inactive Active ON
SW5-3
SW5-4
SW5-5
SW5-6
SW5-7
SW5-8 — — — OFF
SW6 SW6-1 — — — OFF
SW6-2 — — — OFF
SW6-3 Pressure sensor Inactive Active OFF: Except E*ST**D-*M**D
ON : E*ST**D-*M**D
SW6-4 Analog output signal Inactive Active OFF
SW6-5 — — — OFF
<Table 6.6.1>
<Figure 6.6.1>
SW1
SW3
SW4
SW2
SW5
SW5-3 SW5-4 SW5-5 SW5-6 SW5-7
E*ST**C-*M**D ON ON ON ON OFF
E*ST**D-*M**D ON OFF OFF ON OFF
E**T**X-*M**D* OFF OFF OFF OFF OFF
Capacity code
SW6
Notes: *1. When the cylinder unit is connected with a PUMY-P outdoor unit of which maximum outlet water temperature is 55ºC, DIP SW1-2 must be
changed to OFF.
*2. External output (OUT11) will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation
must be stopped and only the water circulation pump keeps running.)
*3. Active only when SW3-6 is set to OFF.
*4. This switch functions only when the cylinder unit is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is con-
nected, the heating mode function is active regardless of the fact that this switch is ON or OFF.
*5. Space heating and DHW can be operated only in indoor unit, like an electric heater. (Refer to "5.4 Indoor unit only operation" on the manual
of RG79F364H01 (page 19). )
*6. If emergency mode is no longer required, return the switch to OFF position.

19
OCH714A
FIELD WIRING
7
Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
TB1 Terminal block 1
L
N
S1
S2
S3
S1
S2
S3
TB1
L
N
ECB1
L
N
ECB2
L
N
Earth
leakage
circuit
breaker
*1 ,*2
Wiring cir-
cuit breaker
or
Isolating
switch
Outdoor unit
Power supply
~/N 230 V 50 Hz
Wiring
circuit
breaker or
Isolating
switch
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
For
Immersion
heater
(DHW tank)
Cylinder unit
Power supply
~/N 230 V 50 Hz
Power supply
~/N 230 V 50 Hz
Option 1: Cylinder unit powered via outdoor unit
(If you want to use independent source, go to the Mitsubishi website.)
<1 phase>
<Figure 7.1>
Electrical connections 1 phase
Description Power supply Capacity Breaker Wiring
Booster heater (Primary circuit) ~/N 230 V 50 Hz 2 kW 16 A *2 2.5 mm²
6 kW 32 A *2 6.0 mm²
Immersion heater (DHW tank) ~/N 230 V 50 Hz 3 kW 16 A *2 2.5 mm²
Wiring
Wiring No.
× size (mm²)
Cylinder unit - Outdoor unit *3 3 × 1.5 (polar)
Cylinder unit - Outdoor unit earth *3 1 × Min. 1.5
Circuit
rating
Cylinder unit - Outdoor unit S1 - S2 *4 230 V AC
Cylinder unit - Outdoor unit S2 - S3 *4 24 V DC
*3. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*4. 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 polychloroprene sheathed exible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed exible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufcient power supply capacity might cause chattering.
*1. If the installed earth leakage circuit
breaker does not have an over-
current protection function, install a
breaker with that function along the
same power line.
*2.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.
Affix label A that is included with the manuals near each
wiring diagram for cylinder unit and outdoor units.

20
OCH714A
L1
L2
S1
S2
S3
TB1
L2
L3
ECB1
L
N
ECB2
N
L3
L1
S1
S2
S3
L
N
Power supply
3N~ 400 V 50 Hz
Earth
leakage
circuit
breaker
*1, *2
Wiring
circuit
breaker
or
Isolating
switch
Power supply
3~ 400 V 50 Hz (E**T***-YM9*D)
3~ 230 V 50 Hz (E**T***-TM9*D)
Power supply
~/N 230 V 50 Hz
Wiring
circuit
breaker
or
Isolating
switch
Wiring cir-
cuit breaker
or
Isolating
switch
For
booster
heater
(Primary circuit)
For
Immersion
heater
(DHW tank)
To control
board
Outdoor unit
Cylinder unit
<3 phase>
<Figure 7.2>
Electrical connections 3 phase
Description Power supply Capacity (Indoor unit Ref.) Breaker Wiring
Booster heater (Primary circuit) 3~ 400 V 50 Hz 9 kW 16 A *2 2.5 mm²
3~ 230 V 50 Hz 9 kW 32 A *2 6.0 mm²
Immersion heater (DHW tank) ~/N 230 V 50 Hz 3 kW 16 A *2 2.5 mm²
Wiring
Wiring No.
× size (mm²)
Cylinder unit - Outdoor unit *3 3 × 1.5 (polar)
Cylinder unit - Outdoor unit earth *3 1 × Min. 1.5
Circuit
rating
Cylinder unit - Outdoor unit S1 - S2 *4 230 V AC
Cylinder unit - Outdoor unit S2 - S3 *4 24 V DC
*3. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*4. 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 polychloroprene sheathed exible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed exible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufcient power supply capacity might cause chattering.
Afx label A that is included with the manuals near each
wiring diagram for cylinder unit and outdoor units.
*1. If the installed earth leakage circuit
breaker does not have an over-
current protection function, install a
breaker with that function along the
same power line.
*2. 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.