Mitsubishi Electric EHSD-MED User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL................................... 3
2. SAFETY PRECAUTION................................... 4
3. SPECIFICATIONS............................................ 6
4. PART NAMES AND FUNCTIONS .................. 8
5. OUTLINES AND DIMENSIONS....................... 9
6. WIRING DIAGRAM.........................................11
7. FIELD WIRING............................................... 17
8. WATER SYSTEM DIAGRAM......................... 19
9. CONTROLS ................................................... 22
10. TROUBLESHOOTING................................... 43
11. DISASSEMBLY PROCEDURE...................... 60
12. SUPPLEMENTARY INFORMATION ............. 80
13. SERVICE AND MAINTENANCE ................... 81
Note:
•This manual describes
service data of
Hydrobox only.
MAIN REMOTE
CONTROLLER
PARTS CATALOG (OCB712)
HYDROBOX
October 2020
HYDROBOX
No. OCH712
REVISED EDITION-C
[Model Name]
EHSD-MED
EHSD-VM2D
EHSD-VM6D
EHSD-YM9D
EHSD-YM9ED
EHSD-TM9D
ERSD-MED
ERSD-VM2D
ERSD-VM6D
ERSD-YM9D
[Service Ref.]
Refer to page 2.
EHSC-MED
EHSC-VM2D
EHSC-VM6D
EHSC-YM9D
EHSC-YM9ED
EHSC-TM9D
ERSC-MED
ERSC-VM2D
ERSC-VM6D
ERSC-YM9D
Revision:
• ERSD-VM6D, ERSD-
YM9D, ERSC-VM6D,
ERSC-YM9D and
ERPX series have been
added.
• Some descriptions
have been modified
in
REVISED EDITION-C
.
OCH712B is void.
EHSE-MED
EHSE-YM9ED
ERSE-MED
ERSE-YM9ED
EHPX-VM2D
EHPX-VM6D
EHPX-YM9D
EHPX-MED
EHPX-YM9ED
ERPX-MD
ERPX-VM2D
ERPX-VM6D
ERPX-YM9D

2
[Service Ref.]
EHSD-MED.UK
EHSD-VM2D.UK
EHSD-VM6D.UK
EHSD-YM9D.UK
EHSD-YM9ED.UK
EHSD-TM9D.UK
ERSD-MED.UK
ERSD-VM2D.UK
ERSD-VM6D.UK
ERSD-YM9D.UK
EHSC-MED.UK
EHSC-VM2D.UK
EHSC-VM6D.UK
EHSC-YM9D.UK
EHSC-YM9ED.UK
EHSC-TM9D.UK
ERSC-MED.UK
ERSC-VM2D.UK
ERSC-VM6D.UK
ERSC-YM9D.UK
EHSE-MED.UK
EHSE-YM9ED.UK
ERSE-MED.UK
ERSE-YM9ED.UK
EHPX-VM2D.UK
EHPX-VM6D.UK
EHPX-YM9D.UK
EHPX-MED.UK
EHPX-YM9ED.UK
ERPX-MD.UK
ERPX-VM2D.UK
ERPX-VM6D.UK
ERPX-YM9D.UK
OCH712C

3
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-SW160YKAR1(-BS).UK
PUHZ-SW200YKAR1(-BS).UK
OCH583
OCB583
PUHZ-SHW230YKA2R2 OCH594
OCB594
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(-BS).UK
PUZ-WM85VAA(-BS).UK
PUZ-WM85YAA(-BS).UK
PUZ-WM112VAA(-BS).UK
PUZ-WM112YAA(-BS).UK
OCH727
OCB727
PUZ-HWM140VHA(-BS)
PUZ-HWM140YHA(-BS)
OCH748
OCB748
OCH712C

4
SAFETY PRECAUTION
2
WARNING
Mechanical
The hydrobox and outdoor units 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 hydrobox should be positioned on a hard vertical 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 hydrobox.
The discharge pipework from the emergency/safety devices of the hydrobox 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 hydrobox 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 hydrobox and the outdoor unit should be conducted by a qualied person.
Do not place containers with liquids on top of the hydrobox. If they leak or spill onto the hydrobox damage to the unit and/or re could occur.
Do not place any heavy items on top of the hydrobox.
When installing, relocating, or servicing the hydrobox, 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 the case of brazing the refrigerant pipes.
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.
Mitsubishi Electric is not responsible for the failure of locally-supplied parts.
• Be sure to perform periodical maintenance.
• Be sure to follow your local regulations.
• Be sure to follow the instructions provided in this manual.
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.
OCH712C

Unit
Electronic weighing scale
5
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 hydrobox 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 water circuit.
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.
If power to the hydrobox is to be turned off (or system switched off) for a long time, the water should be drained.
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.
In order to prevent condensation on emitters, adjust ow temperature appropriately and also set the lower limit of the ow temperature on site.
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 —
OCH712C

6
SPECIFICATIONS
3
Model name EHSD-
MED
EHSD-
VM2D
EHSD-
VM6D
EHSD-
YM9D
EHSD-
YM9ED
EHSD-
TM9D
ERSD-
MED
ERSD-
VM2D
ERSD-
VM6D
ERSD-
YM9D
EHSC-
MED
EHSC-
VM2D
EHSC-
VM6D
EHSC-
YM9D
EHSC-
YM9ED
EHSC-
TM9D
ERSC-
MED
ERSC-
VM2D
ERSC-
VM6D
ERSC-
YM9D
Overall unit dimensions (Height × Width × Depth) 800 × 530 × 360 mm Weight (empty) 36 kg 43 kg 44 kg 44 kg 40 kg 44 kg 38 kg 44 kg 43 kg 44 kg 40 kg 47 kg 48 kg 48 kg 43 kg 48 kg 41 kg 48 kg 48 kg 48 kg
Weight (full) 38 kg 48 kg 49 kg 49 kg 45 kg 49 kg 39 kg 50 kg 49 kg 50 kg 42 kg 53 kg 54 kg 54 kg 50 kg 54 kg 44 kg 54 kg 54 kg 55 kg
Water volume of heating circuit in the unit *1 1.7 L 5.2 L 5.2 L 5.2 L 5.2 L 5.2 L 1.7 L 5.2 L 5.2 L 5.2 L 2.6 L 6.1 L 6.1 L 6.1 L 6.1 L 6.1 L 2.6 L 6.1 L 6.1 L 6.1 L
Unvented expansion vessel(Primary heating)
Nominal volume — 10 L — 10 L — 10 L — 10 L — 10 L — 10 L
Charge pressure — 0.1 MPa (1 bar) — 0.1 MPa
(1 bar) — 0.1 MPa (1 bar) — 0.1 MPa (1 bar) — 0.1 MPa
(1 bar) — 0.1 MPa (1 bar)
Safety device
Water circuit (Primary)
Control thermistor 80°C Pressure relief valve 0.3 MPa (3 bar) Flow sensor Min. ow 5.0 L/min (See table 10.6.1 about water ow rate range)
Booster heater
Manual reset thermostat — 90°C — 90°C — 90°C — 90°C
Thermal Cut-out (for dry run prevention) — 121°C — 121°C — 121°C — 121°C
Connections
Water (primary circuit) 28 mm / Compression G1-B 28 mm / Compression G1-B Refrigerant (R32/ R410A)
Liquid Ø6.35 mm Ø9.52 mm Gas Ø12.7 mm Ø15.88 mm
Target temperature range
Flow temperature
Heating 20 - 60°C Cooling — 5 - 25°C — 5 - 25°C
Room temperature
Heating 10 - 30°C Cooling —
Guaranteed operating range
Ambient *2 0 - 35°C ( 80 %RH)
Outdoor temperature
Heating See outdoor unit spec table. Cooling — *3 — *3
Electrical data
Control board (Including 3 pumps)
Power supply (Phase, voltage, frequency) ~/N, 230 V, 50 Hz Breaker (*when powered from independent source)
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
3~, 400 V,
50 Hz
3~
,
230 V,
50 Hz
—
~/N,
230 V,
50 Hz
3~,
400 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
3 kW
+6 kW — 2 kW 2 kW
+4 kW
3 kW
+6 kW
Current — 9 A 26 A 13 A 23 A —9 A 26 A 13 A —9 A 26 A 13 A 23 A —9 A 26 A 13 A
Breaker — 16 A 32 A 16 A 32 A —16 A 32 A 16 A —16 A 32 A 16 A 32 A —16 A 32 A 16 A
Sound power level 41 dB(A) 40 dB(A) 40 dB(A)
<Table 3.1>
*1 Piping to Expansion vessel is 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.
OCH712C

7
Model name ERSE-YM9ED ERSE-MED EHSE-YM9ED EHSE-MED EHPX-MED EHPX-VM2D EHPX-VM6D EHPX-YM9D EHPX-YM9ED ERPX-MD ERPX-VM2D ERPX-VM6D ERPX-YM9D
Overall unit dimensions (Height × Width × Depth) 950 × 600 × 360 mm 800 × 530 × 360 mm Weight (empty) 64 kg 62 kg 63 kg 61 kg 25 kg 32 kg 33 kg 33 kg 28 kg 30 kg 33 kg 34 kg 35 kg
Weight (full) 74 kg 72 kg 73 kg 71 kg 26 kg 36 kg 37 kg 38 kg 32 kg 31 kg 37 kg 38 kg 39 kg
Water volume of heating circuit in the unit *1 10.0 L 10.0 L 10.0 L 10.0 L 1.0 L 4.5 L 4.5 L 4.5 L 4.5 L 1.0 L 4.5 L 4.5 L 4.5 L
Unvented expansion vessel(Primary heating)
Nominal volume — — — — — 10 L — 10 L Charge pressure — — — — — 0.1 MPa (1 bar) — 0.1 MPa (1 bar)
Safety device
Water circuit (Primary)
Control thermistor 80°C Pressure relief valve 0.3 MPa (3 bar) — 0.3 MPa (3 bar) Flow sensor Min. ow 5.0 L/min (See table 10.6.1 about water ow rate range)
Booster heater
Manual reset thermostat 90°C — 90°C — — 90°C — 90°C
Thermal Cut-out (for dry run prevention) 121°C — 121°C — — 121°C — 121°C
Connections
Water (primary circuit) G1-1/2-B 28 mm / Compression G1-B Refrigerant (R32/ R410A)
Liquid Ø9.52 mm — — — — — — — — —
Gas Ø25.4 mm (Brazing) — — — — — — — — —
Target temperature range
Flow temperature
Heating 20 - 60°C Cooling — 5 - 25°C
Room temperature
Heating 10 - 30°C Cooling —
Guaranteed operating range
Ambient *2 0 - 35°C ( 80 %RH)
Outdoor temperature
Heating See outdoor unit spec table Cooling *3 — — *3
Electrical data
Control board (Including 3 pumps)
Power supply (Phase, voltage, frequency) ~/N, 230 V, 50 Hz Breaker (*when powered from independent source)
10 A
Booster heater
Power supply (Phase, voltage, frequency)
3~, 400 V,
50 Hz —3~, 400 V,
50 Hz — —
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz —
~/N, 230 V,
50 Hz
3~, 400 V,
50 Hz
Capacity 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
Current 13 A —13 A — — 9 A 26 A 13 A —9 A 26 A 13 A
Breaker 16 A —16 A — — 16 A 32 A 16 A —16 A 32 A 16 A
Sound power level 45 dB(A) 40 dB(A)
<Table 3.2>
*1 Piping to Expansion vessel is 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.
OCH712C

8
PART NAMES AND FUNCTIONS
4
<Figure 4.3> <Figure 4.4>
No. Part name EHPX-*M*(E)D ERPX-MD ERPX-*M*D EHS*-MED EHS*-*M*D EHS*-YM9ED ERS*-*M*(E)D ERS*-MED
1 Control and electrical box
2 Main remote controller
3Plate heat exchanger (Refrigerant - Water) - - -
4 Water circulation pump 1
5 Pump valve
6 Air vent (manual) - - -
7 Drain cock (Primary circuit) -
8 Booster heater 1,2 - - -
9Flow sensor
10 Manometer
11 Pressure relief valve (3 bar) - - -
12 Automatic air vent
13 Expansion vessel *1 - - *2 -
14 Strainer valve
15 Drain pan - - - -
16 Pressure relief valve (5 bar) *1 - - *2 -
17 Pressure sensor - - - *3 *3 *3 *3 *3
<Table 4.1>
<E*S*-*M**D> (Split model system)
7
11
9
8
14
12
3
4
5
16
13
<E*SE-*M*ED> (Split model system)
15
14
3
5
15
7
9
8
12
11
417
Note:
For installation of all E***-*M*ED
models, make sure to install
a suitably sized primary-side
expansion vessel. (See gure 8.1
and 8.2 for further guidance)
6
6
1
2
10
9
8
14
12
5
4
7
<E*PX-*M**D> (Packaged model system)
<Figure 4.1> <Figure 4.2>
16
13
*1 EHPX-YM9ED and
EHPX-MED are not included.
*2 ERSE-YM9ED is not included.
*3 Only 2HP (E*SD) model.
15
OCH712C

9
OUTLINES AND DIMENSIONS
5
5-1. Technical Drawings
<Front> <Side> <Rear>
<Unit: mm>
Letter Pipe description Connection size/type
ASpace heating/Indirect DHW tank (primary)
RETURN connection
28mm/Compression (EHSD/EHSC/EHPX-*)
G1 nut (ERSD/ERSC/ERPX-*)
G1-1/2 nut (E*SE-*)
BSpace heating/Indirect DHW tank (primary)
FLOW connection
28mm/Compression (EHSD/EHSC/EHPX-*)
G1 nut (ERSD/ERSC/ERPX-*)
G1-1/2 nut (E*SE-*)
C Refrigerant (Liquid)
6.35 mm/Flare (E*SD-*)
9.52 mm/Flare (E*SC-*)
9.52 mm/Flare (E*SE-*)
Warning
• Refrigerant pipes connection shall be accessible for
maintenance purposes.
• In the case of reconnecting the refrigerant pipes after
detaching, make the flared part of pipe re-fabricated.
D Refrigerant (Gas)
12.7 mm/Flare (E*SD-*)
15.88 mm/Flare (E*SC-*)
Brazing connection I.D.
ø25.4 (E*SE-*)
EFlow connection FROM heat pump 28 mm/Compression (EHPX-*)
G1 nut (ERPX-*)
F
Return connection TO heat pump
28 mm/Compression (EHPX-*)
G1 nut (ERPX-*)
GDischarge pipe (by installer) from pressure
relief valve G1/2” female (valve port within hydrobox casing)
H
Electrical cable inlets For inlets and , run high-voltage wires including power cable, indoor-outdoor
cable, and external output wires.
For inlets and , run low-voltage wires including external input wires and
thermistor wires.
For a wireless receiver (option) cable, use inlet .
I Drain socket O.D. ø20
<Table 5.1>
530
(242)
G1/2
800
578
242
100±5
110
AUTO AIR VENT
FRONT PANEL
EARTH LEAKAGE BREAKER
TERMINAL BED
MAIN CONTROLLER
MANOMETER
PRESSURE RELIEF VALVE
BACK PANEL SUPPORT
HOOK
H
291
263
103
48
78
86
124
163
334
419
(348)
357
F
A
BE
<View from below>
<EHPX> (Packaged model system for heating)
I
H
291
263
183
103
F
48
60
86
124
145
163
248
361
446
(348)
357
EBA
<View from below>
<ERPX> (Packaged model system for heating and cooling)
OCH712C

10
ID CB
A
GH
(348)
357
291
263
242
134
94
163
461
365
308
223
124
86
133
48
<EHS*> (Split model system for heating) <ERS*> (Split model system for heating and cooling)
H G
DC
B A
(348)
357
461
395
310
213
163
153
124
86
48
291
263
242
164
98
<View from below> <View from below>
<E*SE> (Split model system for heating/ heating and cooling)
A
40 242
578
950
600
100±5
G1/2
110
(242)
CD
AB
I
HG
187
249
300
367
492
541
110
124
193
242
48
86
124
163
263
291
357
(348)
AUTO AIR VENT
FRONT PANEL
EARTH LEAKAGE BREAKER
TERMINAL BED
MAIN CONTROLLER
MANOMETER PRESSURE
RELIEF VALVE
BACK PANEL SUPPORT
HOOK
<Front> <Side> <Rear>
REFRIGERANT
(LIQUID 3/8)
REFRIGERANT(GAS)
*REFER TO DETAIL VIEW A.
SPACE HEATING FLOW
(ISO 228-1 G1-1/2-B)
SPACE HEATING RETURN
(ISO 228-1 G1-1/2-B)
DEATIL VIEW A
ADD AN ACCESSORY
TO REFRIGERANT GAS
PIPE. (FLARING) 3/4F REFRIGERANT (GAS)
CONNECTION (BRAZING)
I.D. ø25.4
<Unit: mm>
<View from below>
OCH712C

11
WIRING DIAGRAM
6
6-1. EHSD-MED.UK, ERSD-MED.UK, EHSC-MED.UK, ERSC-MED.UK,
EHSE-MED.UK, ERSE-MED.UK, EHPX-MED.UK, ERPX-MD.UK
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1(Space heating and 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)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BH2 Booster heater 2
BHC1 Contactor for booster heater 1
BHC2 Contactor for booster heater 2
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5B Thermistor (DHW tank water temp.)(Option)
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 6.6.1
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
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 thermostat 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
—
CN851 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)
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
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
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)
Signal output
(Cooling)
2WV2a
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
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)
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
OG
YE
1
3
5
CN01
(BK)
2WV1
M
1~
1
4
CN401
(WH)
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°
TAB1
CN22
(BU)
THTH1TH2THW5B
- + + -
V
- + - +
14
t° t°t°
THW2THW1
1 4
Pressre
Sensor *
CN401
(WH)
4 5 6
TBO.2
F1
IEC T10AL250V
F2
IEC T6.3AL250V
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.
OCH712C

12
6-2. EHSD-VM2D.UK, ERSD-VM2D.UK, EHSC-VM2D.UK, ERSC-VM2D.UK, EHPX-VM2D.UK, ERPX-VM2D.UK
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 thermostat 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.
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1(Space heating and 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)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BHC1 Contactor for booster heater 1
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5B Thermistor (DHW tank water temp.)(Option)
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 6.6.1
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
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
—
CN851 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)
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
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
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)
Signal output
(Cooling)
2WV2a
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
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°
TAB1
CN22
(BU)
THTH1TH2THW5B
- + + -
V
- + - +
1
t° t°t°
THW2THW1
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)
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
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
2WV1
M
1~
456
TBO.2
F1
IEC T10AL250V
F2
IEC T6.3AL250V
1 4
Pressre
Sensor *
CN401
(WH)
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.
OCH712C

13
6-3. EHSD-VM6D.UK, ERSD-VM6D.UK, EHSC-VM6D.UK, ERSC-VM6D.UK, EHPX-VM6D.UK, ERPX-VM6D.UK
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1(Space heating and 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)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BH2 Booster heater 2
BHC1 Contactor for booster heater 1
BHC2 Contactor for booster heater 2
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5B Thermistor (DHW tank water temp.)(Option)
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 6.6.1
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
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 thermostat 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
—
CN851 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)
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
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
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)
Signal output
(Cooling)
2WV2a
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
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)
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
OG
YE
1
3
5
CN01
(BK)
2WV1
M
1~
1
4
CN401
(WH)
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°
TAB1
CN22
(BU)
THTH1TH2THW5B
- + + -
V
- + - +
14
t° t°t°
THW2THW1
1 4
Pressre
Sensor *
CN401
(WH)
4 5 6
TBO.2
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
F1
IEC T10AL250V
F2
IEC T6.3AL250V
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.
OCH712C

14
6-4. EHSD-YM9D.UK, EHSD-YM9ED.UK, ERSD-YM9D.UK, EHSC-YM9D.UK, EHSC-YM9ED.UK, ERSC-YM9D.UK,
EHSE-YM9ED.UK, ERSE-YM9ED.UK, EHPX-YM9D.UK, EHPX-YM9ED.UK, ERPX-YM9D.UK
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 thermostat 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.
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1(Space heating and 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)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BH2 Booster heater 2
BHC1 Contactor for booster heater 1
BHC2 Contactor for booster heater 2
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5B Thermistor (DHW tank water temp.)(Option)
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)
Terminal block <Outputs>
Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1 6 DIP switch *See Table 6.6.1
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
2
CN22
(BU)
CN108
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
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
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
3WV
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)
Signal output
(Cooling)
2WV2a
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
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)
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
OG
YE
1
3
5
CN01
(BK)
2WV1
M
1~
1
4
CN401
(WH)
456
TBO.2
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
CN01
(BK)
F1
IEC T10AL250V
F2
IEC T6.3AL250V
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°
TAB1
CN22
(BU)
THTH1TH2THW5B
- + + -
V
- + - +
14
t° t°t°
THW2THW1
1 4
Pressre
Sensor *
CN401
(WH)
CNV1
(WH)
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.
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
—
CN851 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
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
OCH712C

15
6-5. EHSD-TM9D.UK, EHSC-TM9D.UK
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.
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster 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)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BH2 Booster heater 2
BHC1 Contactor for booster heater 1
BHC2 Contactor for booster heater 2
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5B Thermistor (DHW tank water temp.)(Option)
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 6.6.1
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
2
CN22
(BU)
CN108
1
3
CN3C
(BU)
1
3
CNPWM
(WH)
1
8
CN851
(BK)
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
TAB1
1
8
1
8
1
8
1
8
1
6
SW1
SW2
SW3
SW4
SW5
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
3WV
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)
Signal output
(Cooling)
2WV2a
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
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)
1
5
SW6
M
1~
M
1~
M
1~
M
1~
M
1~
OG
YE
1
3
5
CN01
(BK)
2WV1
M
1~
1
4
CN401
(WH)
456
TBO.2
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
CN01
(BK)
F1F2
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°
TAB1
CN22
(BU)
THTH1TH2THW5B
- + + -
V
- + - +
14
t° t°t°
THW2THW1
1 4
Pressure
Sensor
CN401
(WH)
CNV1
(WH)
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
—
CN851 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.
Tool
Tool
Conductor Conductor
Outline view Top view
<How to use TBO.1 to 4>
Connect them using either way as shown below.
1. Symbols used in wiring diagram are,
: connector, : terminal block.
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.
LED1
LED2
LED3
LED4
OCH712C

16
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 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 model name
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 OFF
SW1-4 Immersion heater WITHOUT Immersion heater WITH Immersion heater OFF
SW1-5 Booster heater WITHOUT Booster heater WITH Booster heater OFF: E***-M*D
ON : E***-*M2/6/9*D
SW1-6 Booster heater function For heating only For heating and DHW OFF: E***-M*D
ON : E***-*M2/6/9*D
SW1-7 Outdoor unit type Split type Packaged type OFF: Except E*PX-*M**D
ON : E*PX-*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***-VM2*D
ON : E***-VM2*D
SW2-4 Cooling mode function Inactive Active OFF: Except ER**-*M**D
ON : ER**-*M**D
SW2-5 Automatic switch 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 *3 OFF
SW2-8 Flow sensor WITHOUT Flow sensor WITH Flow sensor ON
SW3 SW3-1 Room thermostat 2 input 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 — — — OFF
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 OFF
SW3-8 Heat meter WITHOUT Heat meter WITH Heat meter OFF
SW4 SW4-1 Multiple outdoor units control Inactive Active OFF
SW4-2 Position of multiple outdoor units control *5 Sub Main OFF
SW4-3 — — — OFF
SW4-4
Indoor unit only operation (during installation work)
*6 Inactive Active OFF
SW4-5 Emergency mode (Heater only operation) Normal
Emergency mode (Heater only operation) OFF *7
SW4-6 Emergency mode (Boiler operation) Normal Emergency mode (Boiler operation) OFF *7
SW5 SW5-1
DHW tank water temperature over heat protection (L4) Active Inactive *8 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*SD-*M**D
ON : E*SD-*M**D
SW6-4 Analog output signal (0 to 10V) Inactive Active OFF
SW6-5 — — — OFF
<Table 6.6.1>
<Figure 6.6.1>
SW5-3 SW5-4 SW5-5 SW5-6 SW5-7
E*SC-*M**D ON ON ON ON OFF
E*SD-*M**D ON OFF OFF ON OFF
E*SE-*M*ED OFF ON ON OFF ON
E*PX-*M**D OFF OFF OFF OFF OFF
Capacity code
Notes: *1. When the hydrobox 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. 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 hydrobox is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected,
the heating mode function is active regardless of the fact that this switch is ON or OFF.
*5. Active only when SW4-1 is set to ON.
*6. Space heating and DHW can be operated only in indoor unit, like an electric heater. (Refer to "Indoor unit only operation” in page 42. )
*7. If emergency mode is no longer required, return the switch to OFF position.
*8. Please make sure to have necessary overheat protection on locally supplied solar thermal system side to secure safety, as the tank tem-
perature could be much higher (than current).
SW1
SW3
SW4
SW2
SW5
SW6
OCH712C

17
FIELD WIRING
7
L
N
S1
S2
S3
S1
S2
S3
TB1
L
N
ECB1
L
N
Earth
leakage
circuit
breaker
*1, *2
Outdoor unit
Power supply
~/N 230 V 50 Hz
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power supply
~/N 230 V 50 Hz
L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
N
L3
L1
N
L
Earth
leakage
circuit
breaker
*1, *2
Outdoor unit
Power supply
3~ 400 V 50 Hz (E***-YM9*D)
3~ 230 V 50 Hz (EH**-TM9*D)
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power supply
3N~ 400 V 50 Hz
Option1: Hydrobox powered via outdoor unit
<1 phase>
Afx label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
<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
<Figure 7.2>
Electrical connections 3 phase
Description Power supply Capacity 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
Wiring No.
× size (mm²)
Hydrobox - Outdoor unit *3 3 × 1.5 (polar)
Hydrobox - Outdoor unit earth *3 1 × Min. 1.5
Circuit rating Hydrobox - Outdoor unit S1 - S2 *4 230 VAC
Hydrobox - Outdoor unit S2 - S3 *4 24 VDC
*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.
*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 line longer than power cables.
4. Please keep enough output capacity of power supply for each heater. Insufcient power supply capacity might cause chattering.
<3 phase>
Afx label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
OCH712C

18
L
N
S1
S2
S3
S1
S2
S3
TB1
L
N
ECB1
L
N
For
booster
heater
To control
board
Outdoor unit
Wiring
circuit
breaker or
Isolating
switch
Earth
leakage
circuit
breaker
*1, *2
Power supply
~/N 230 V 50 Hz
Earth
leakage
circuit
breaker
*1, *2
Wiring
circuit
breaker or
Isolating
switch
Wiring
circuit
breaker or
Isolating
switch
Power supply
~/N 230 V 50 Hz
Hydrobox
L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
N
L3
L1
L
N
Earth
leakage
circuit
breaker
*1, *2
Outdoor unit
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power supply
~/N 230 V 50 Hz
Earth
leakage
circuit
breaker
*1, *2
Wiring
circuit
breaker or
Isolating
switch
Hydrobox power supply ~/N 230 V 50 Hz
Hydrobox input capacity
Main switch (Breaker) *2 16 A
Wiring No.
× size (mm²)
Hydrobox power supply 2 × Min. 1.5
Hydrobox power supply earth 1 × Min. 1.5
Hydrobox - Outdoor unit *3 2 × Min. 0.3
Hydrobox - Outdoor unit earth —
Circuit
rating
Hydrobox L - N *4 230 VAC
Hydrobox - Outdoor unit S1 - S2 *4 —
Hydrobox - Outdoor unit S2 - S3 *4 24 VDC
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 line longer than power cables.
4. Please keep enough output capacity of power supply for each heater. Insufcient power supply capacity might cause chattering.
Option2: Hydrobox powered by independent source
<1 phase>
<Figure 7.3>
Electrical connections 1 phase
<3 phase>
<Figure 7.4>
Electrical connections 3 phase
*1. If the installed earth leakage circuit breaker does not have an
over-current protection function, install a breaker with that func-
tion 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 ac-
tive phase conductors of the supply.
*3. Max. 120 m
*4. The values given in the table above are not always measured
against the ground value.
Afx label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Afx label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Description Power supply Capacity 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
Description Power supply Capacity Breaker Wiring
Booster heater
~/N 230 V 50 Hz
2 kW 16 A *2 2.5 mm²
6 kW 32 A *2 6.0 mm²
Power supply
~/N 230 V 50 Hz
Power supply
3N~ 400 V 50 Hz
Power supply
3~ 400 V 50 Hz (E***-YM9*D)
3~ 230 V 50 Hz (EH**-TM9*D)
OCH712C

19
WATER SYSTEM DIAGRAM
8
P
21
22
25
28
26
27
28
29
29
5
3
19
10
11
12 13
14
17
18
23
24
30
47
8
9
16
8
911
12
17
6
20
Note
• Be sure to follow your local regulations to perform system conguration of the DHW con-
nections.
• DHW connections are not included in the hydrobox package. All required parts are to be
sourced locally.
• To enable draining of the hydrobox an isolating valve should be positioned on both the inlet
and outlet pipework.
• Be sure to install a strainer on the inlet pipe work to the hydrobox.
• Suitable drain pipework should be attached to the relief valves instructed to be connected
to it in Figure 8.1 and 8.2 in accordance with your country's regulations.
• A backow prevention device must be installed on water supply pipework (IEC 61770).
• When using components made from different metals or connecting pipes made of different
metals insulate the joints to prevent a corrosive reaction taking place which will damage the
pipework.
No. Part name
EHPX-*M*(E)D ERPX-MD ERPX-*M*D EHS*-MED EHS*-*M*D EHS*-YM9ED ERS*-*M*(E)D ERS*-MED
1 Control and electrical box
2Main remote controller
3Plate heat exchanger
(Refrigerant - Water)
---
4Water circulation pump 1
5Pump valve
6Air vent (manual)
---
7Drain cock (Primary circuit)
-
8Booster heater 1, 2
- - -
9Flow sensor
10 Manometer
11 Pressure relief valve (3 bar)
---
12 Automatic air vent
13 Expansion vessel *3
- -
*4
-
14 Strainer valve
15 Drain pan
----
16 Pressure relief valve (5 bar) *3 - -
*4
-
17 THW1
18 THW2
19 TH2 ---
20 Pressure sensor
---
*5 *5 *5 *5 *5
21
THW5B
(Optional part
PAC-TH011TK2-E or
PAC-TH011TKL2-E)
--------
22 Outdoor unit
--------
23 Drain pipe (Local supply) --------
24 3-way valve (Local supply) --------
25 DHW indirect unvented tank
(Local supply)
--------
26
Cold water inlet pipe
(Local supply)
--------
27 DHW outlet pipe
(Local supply)
--------
28 Back ow prevention device
(Local supply)
--------
29 Isolating valve
(Local supply)
--------
30 Magnetic lter (Local
supply) (Recommended)
--------
31 Strainer (Local supply) --------
32 Air vent (Local supply) --------
<Table 8.1>
<Figure 8.1>
<E*S*> (Split model system)
Local
system *1
Refrigerant flow
Water
supply
DHW
Drain
Drain
Cold
water
Water flow
Hydrobox
Flare connections
<E*SE only>
*1 Refer to the following section [Local system].
*2 If the outdoor unit is higher than the indoor unit, or if there is a
location where air gets trapped in the upper part of the water
pipe, consider adding this part.
*3 EHPX-YM9ED and EHPX-MED are not included.
*4 ERSE-YM9ED is not included.
*5 Only 2HP(E*SD) model.
<Figure 8.2>
Pa
21
25
28
26
27
28
29
29
8
7
5
9
10
12 13
14
17
18
24
31
3
22 29
31
31
29
4
16
11
32 *2
<E*PX> (Packaged model system)
Water
supply
DHW
Drain
Cold
water
Water flow
Hydrobox
Local
system *1
Note:
Do not attach an
additional pressure
relief valve to the
heating (cooling)
circuit on E*PX
model to keep fire
safety.
OCH712C

20
Local system
1-zone temperature control
2-zone temperature control 1-zone temperature control with boiler
2-zone temperature control & Buffer tank control 1-zone temperature control
(2-zone valve ON/OFF control)
3
6
5
2
4
7
8
1
10
9
11
Zone1
Zone2
1
2
3
5
4
Zone1
1
5
4
3
2
11
13
Zone1
3
6
5
2
4
7
8
1
10
9
12
*1
Zone1
Zone2
1. Zone1 heat emitters (e.g. radiator, fan coil unit) (local supply)
2. Mixing tank (local supply)
3. Zone1 ow water temp. thermistor (THW6)
4. Zone1 return water temp. thermistor (THW7)
5. Zone1 water circulation pump (local supply)
6. Motorized mixing valve (local supply)
7. Zone2 ow water temp. thermistor (THW8)
8. Zone2 return water temp. thermistor (THW9)
9. Zone2 water circulation pump (local supply)
Optional part: PAC-TH011-E
Optional part: PAC-TH011-E
10. Zone2 heat emitters (e.g. underoor heating) (local supply)
11. Boiler ow water temp. thermistor (THWB1)
12. Mixing tank thermistor (THW10) *1
13. Boiler (local supply)
14. Zone1 2-way valve (local supply)
15. Zone2 2-way valve (local supply)
16. Bypass valve (local supply)
*1 ONLY Buffer tank control (heating/cooling) applies to "Smart grid ready".
Optional part:
PAC-TH012HT(L)-E
1
Zone1
14
16
15
1
10
Zone1
Zone2
OCH712C