Mitsubishi EHSD-VM2C.UK, EHSC-VM2EC.UK, EHSC-MEC.UK, EHSC-VM2C.UK, EHSC-VM6C.UK Service Manual

SERVICE MANUAL

CONTENTS

1. REFERENCE MANUAL

...................................

2

2. SAFETY PRECAUTION

...................................

3

3. SPECIFICATIONS

............................................

6

4. PART NAMES AND FUNCTIONS

..................

7

5. OUTLINES AND DIMENSIONS

.......................

8

6. WIRING DIAGRAM

........................................

10

7. FIELD WIRING

...............................................

16

8. WATER SYSTEM DIAGRAM

.........................

18

9. CONTROLS

...................................................

21

10. TROUBLESHOOTING

...................................

41

11. DISASSEMBLY PROCEDURE

......................

58

12. SUPPLEMENTARY INFORMATION

.............

79

13. SERVICE AND MAINTENANCE

...................

80

Note:

• This manual describes only service data of Hydrobox.

• RoHS compliant products have <G> mark on the spec name plate.

R410A

MAIN REMOTE CONTROLLER

PARTS CATALOG (OCB571)

HYDROBOX

[Model name]

EHSD-MEC

EHSD-VM2C

EHSC-MEC

EHSC-VM2C

EHSC-VM2EC

EHSC-VM6C

EHSC-VM6EC

EHSC-YM9C

EHSC-YM9EC

EHSC-TM9C

ERSD-VM2C

ERSC-MEC

ERSC-VM2C

EHPX-VM2C

EHPX-YM9C

[Service Ref.]

EHSD-MEC.UK EHSD-VM2C.UK EHSC-MEC.UK EHSC-VM2C.UK EHSC-VM2EC.UK EHSC-VM6C.UK EHSC-VM6EC.UK EHSC-YM9C.UK EHSC-YM9EC.UK EHSC-TM9C.UK ERSD-VM2C.UK ERSC-MEC.UK ERSC-VM2C.UK EHPX-VM2C.UK EHPX-YM9C.UK

October 2014

HYDROBOX

No. OCH571

2

REFERENCE MANUAL

1

OUTDOOR UNIT'S SERVICE MANUAL

Service Ref. Service Manual No.

PUHZ-W50/85VHA(-BS)

OCH439

PUHZ-W50/85VHAR1(-BS)

PUHZ-W50VHAR2(-BS)

PUHZ-W50VHAR3(-BS)

PUHZ-W85VHA2-BS.UK

OCH465

PUHZ-W85VHA2(R1)-BS.UK

PUHZ-W112VHA(-BS) OCH562

PUHZ-HW112/140YHA(-BS)

OCH439

PUHZ-HW112/140YHA2(-BS)

PUHZ-HW112/140YHA2R1(-BS)

PUHZ-HW112/140YHA2R3(-BS)

PUHZ-HW112/140YHA2R4(-BS)

PUHZ-HW140VHA(-BS)

PUHZ-HW140VHA2(-BS)

PUHZ-HW140VHA2R1(-BS)

PUHZ-HW140VHA2R2-BS

PUHZ-HW140VHA2R3(-BS)

PUHZ-HW140VHA2R4(-BS)

PUHZ-SW40/50VHA(-BS)

OCH525

PUHZ-SW40/50VHAR1(-BS)

PUHZ-SW75/100/120VHA(-BS)

OCH533PUHZ-SW100/125YHA(-BS)

PUHZ-SW100/125YHAR1(-BS)

PUHZ-SHW80/112VHA

OCH526

PUHZ-SHW80/112VHAR2(-BS).UK

PUHZ-SWH112/140YHA(R1)

PUHZ-SWH112/140YHAR2(-BS).UK

PUHZ-FRP71VHA OCH544

SUHZ-SW45VA(H).TH

OCH557

SUHZ-SW45VA(H)R1.TH

OCH571

3

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.

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 contains 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 specied refrigerant (R410A) 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 refrigerant 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.

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.

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.

This installation manual along with the user manual should be left with the product after installation for future reference. 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.

OCH571

4

CAUTION (SPLIT MODELS ONLY)

Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the specied thickness. (Refer to 4.4 in the installation manual.) Note the following if reusing existing pipes that carried R22 refrigerant.

- Replace the existing are nuts and are the ared sections again.

- Do not use thin pipes. (Refer to 4.4

in the installation manual.

)

Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil deterioration or compressor breakdown may result.

Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the ared sections. If mineral oil is mixed in the refrigeration oil, oil dete-

rioration may result.

Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate.

Use the following tools specically designed for use with R410A refrigerant. The following tools are necessary to use R410A refrigerant. Contact your nearest

dealer for any questions.

Tools (for R410A)

Gauge manifold Flare tool

Charge hose Size adjustment gauge

Gas leak detector Vacuum pump adapter

Torque wrench Electronic refrigerant charging scale

Be sure to use the correct tools. If dust, debris, or moisture enters the refrigerant lines, refrigeration oil deterioration may result.

Do not use a charging cylinder, a cylindrical measuring container, when charging R410A refrigerant gas. If the refrigerant gas is transferred to a charging cylinder, the composition of the refrigerant will change and system efciency will be reduced.

WARNING (SPLIT MODELS ONLY)

Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room.

Use appropriate tools for high pressure refrigerant.

When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes.

During installation securely fasten the refrigerant pipes before starting the compressor.

Check that refrigerant gas does not leak after the completion of installation.

Use R410A refrigerant only. Do not allow air to enter the lines. Failure to observe these instructions will cause mechanical failure, system failure or, in the worst

case, serious breach of product safety.

OCH571

Gravimeter

Unit

5

[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) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from refrigerant cylinder

· Check that refrigerant cylinder for R410A on the market is syphon type.

· 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 refrigerant.

No. Tool name Specifications

1

Gauge manifold

· Only for R410A

· Use the existing fitting

specifications

. (UNF1/2)

· Use high-tension side pressure of 5.3 MPa·G or over.

2

Charge hose

· Only for R410A

· Use pressure performance of 5.09 MPa·G or over.

3

Electronic scale

—

4

Gas leak detector · Use the detector for R134a, R407C or R410A

5

Adaptor for reverse flow check · Attach on vacuum pump.

6

Refrigerant charge base

—

7

Refrigerant cylinder

· Only for R410A ·Top of cylinder (Pink)

· Cylinder with syphon

8

Refrigerant recovery equipment

—

OCH571

6

SPECIFICATIONS

3

Model name

EHSD-MEC EHSD-VM2C EHSC-MEC EHSC-VM2C EHSC-VM2EC EHSC-VM6C EHSC-VM6EC EHSC-YM9C EHSC-YM9EC EHSC-TM9C ERSD-VM2C ERSC-MEC ERSC-VM2C EHPX-VM2C EHPX-YM9C

Overall unit dimensions 800 × 530 × 360 mm (Height × Width × Depth)

Weight (empty) 38 kg 44 kg 42 kg 48 kg 43 kg 49 kg 44 kg 49 kg 44 kg 49 kg 45 kg 43 kg 49 kg 37 kg 38 kg

Weight (full) 44 kg 50 kg 49 kg 55 kg 50 kg 56 kg 51 kg 56 kg 51 kg 56 kg 51 kg 50 kg 56 kg 42 kg 43 kg

Plate heat exchanger (MWA2) — —

— — —

Plate heat exchanger (MWA1)

— — — — — — — — — — — —

Cooling mode NOT available Available NOT available

Unvented expansion

vessel(Primary heat-

ing)

Nominal volume — 10 L — 10 L — 10 L — 10 L — 10 L — 10 L

Charge pressure — 1 bar — 1 bar — 1 bar — 1 bar — 1 bar — 1 bar

Safety

device

Water

circuit

(Pri-

mary)

Control thermistor 1 - 80°C

Pressure relief valve 0.3 Mpa (3bar)

Flow sensor Min ow 5.0 L/min

Booster

heater

Manual reset thermostat — 90°C — 90°C — 90°C

Thermal Cut-out (for dry run prevention) — 121°C — 121°C — 121°C

Primary circuit circulating Pump Grundfos UPM2 15 70 - 130

Connections

Water 28mm compression (primary circuit) G1 (Male)

28mm compression

(primary circuit)

Refrigerant

(R410A)

Liquid 6.35 mm 9.52 mm 6.35 mm 9.52 mm —

Gas 12.7 mm 15.88 mm 12.7 mm 15.88 mm —

Target tempera-

ture range

Flow

temperature

Heating 25 - 60°C

Cooling — 5 - 25°C —

Room

temperature

Heating 10 - 30 °C

Cooling — NOT available —

Guaranteed oper-

ating range

Ambient *1 0 - 35°C (

80 %RH)

Outdoor

temperature

Heating See outdoor unit spec table.

Cooling —

See outdoor unit spec table

(min. 10°C). *2

—

Electrical data

Control board

Power supply

(Phase, voltage, frequency)

~/N, 230 V, 50 Hz

Breaker (*when powered

from independent source)

10A

Booster

heater

Power supply

(Phase, voltage, frequency)

—

~/N, 230 V,

50 Hz

—

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

3~, 400 V,

50 Hz

3~, 400 V,

50 Hz

3~, 230 V,

50 Hz

~/N, 230 V,

50 Hz

—

~/N, 230 V,

50 Hz

~/N, 230 V,

50 Hz

3~, 400 V,

50 Hz

Capacity — 2kW — 2kW 2kW

2kW+

4kW

2kW+

4kW

3kW+

6kW

3kW+

6kW

3kW+

6kW

2kW — 2kW 2kW

3kW+

6kW

Current — 9 A — 9 A 9 A 26 A 26 A 13A 13A 23A 9 A — 9 A 9 A 13A

Breaker — 16 A — 16 A 16 A 32 A 32 A 16A 16A 32A 16 A — 16 A 16 A 16A

Sound level 28 dB(A)

Optional extras

●Wireless Remote Controller PAR-WT50R-E ●

Tank thermistor (THW5) (30 m)

PAC-TH011TKL-E *1 The environment must be frost-free.

●Wir ele ss Re ceiv er PAR-WR51R-E ●Th erm ist or PAC-TH011-E *2 Low ambient cooling is NOT allowed.

●Rem ote Se nsor PAC-SE41TS-E ●High temperature thermistor PAC-TH011HT-E

●Tank thermistor (THW5) (5 m) PAC-TH011TK-E ●ecodan Wi-Fi Interface PAC-WF010-E

OCH571

7

PART NAMES AND FUNCTIONS

4

1

2

9

11

7

8

10

8

7

10

13

12

3

4

5

13

14

5

4

6

<E*S*-*M**C> (Split model system)

<EHPX-*M*C> (Packaged model system)

No. Part name

EHS*-MEC

EHS*-

*M*C

EHSC*M*EC

ERS*VM2C

ERSC-

MEC

EHPX-

*M*C

1 Control and electrical box

2 Main controller

3

Plate heat exchanger (Refrigerant - Water)

-

4 Water circulation pump 1

5 Pump valve

6 Drain cock (Primary circuit)

7 Booster heater 1,2

- -

8 Flow sensor

9 Manometer

10 Pressure relief valve (3bar)

11 Automatic air vent

12 Expansion vessel

- - -

13 Strainer valve

14 Drain pan

- - - -

OCH571

8

OUTLINES AND DIMENSIONS

5

(

348)

357

291

263

242

103

461

419

334

163

124

86

78

48

242

(348)

357

291

263

134

94

133

365

308

163

223

124

461

86

48

100±5

592

800

260

530

B

H

A

H

G

F

E

B

A

B

I

C D

G

A G

C

(348)

461

410

395

353

310

163

124

86

48

291

263

357

242

164

58

(242)

110

D

Unit: mm

<EHS*> (Split model system)

<Front>

Automatic air vent

Front panel

Earth leakage circuit

breaker

Terminal block

Main Controller

Pressure relief valve

G1/2

Back panel support

Hook

<ERS*> (Split model system for heating and cooling)

<EHPX> (Packaged model system)

Letter Pipe description Connection size/type

A

Space heating/Indirect

DHW tank (primary) return connection

28 mm/Compression (EHS*-*and EHPX-*) G1 nut (ERS*-*)

B

Space heating/Indirect DHW tank (primary) ow

connection

28 mm/Compression (EHS*-*and EHPX-*) G1 nut (ERS*-*)

C Refrigerant (Liquid)

6.35 mm/Flare (E*SD-*)

9.52 mm/Flare (E*SC-*)

D Refrigerant (Gas)

12.7 mm/Flare (E*SD-*)

15.88 mm/Flare (E*SC-*)

E

Flow connection from heat

pump

28 mm/Compression (EHPX-*)

F

Return connection to heat pump

28 mm/Compression (EHPX-*)

G

Discharge 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

5-1. Technical Drawings

OCH571

a

b

d

c

9

Service access

5-2. Service access diagrams

Service access

Parameter Dimension (mm)

a 200 b 150 c 500 d 500

Sufcient space MUST be left for the provision of discharge pipework as detailed in National and Local building regulations.

The hydrobox must be located indoors and in a frost-free environment, for example in a utility room.

OCH571

NL

S3S2S1

NL

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

1

3

CN3C (BLU)

BLK

1

3

ORN

BRN

CN3C (BLU)

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

1

3

CN3C (BLU)

1

3

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

°

THW8

THW7

THW6

t

°

THW9

t

°

THWB1

t

°

THWB2

t

°

Main

controller

1 2

1

2

CN20

(RED)

TH1

t

°

1

3

CN21

(YLW)

TH2

t

°

1

4

THW1

THW2

CNW12

(RED)

t°t

°

2

1

THW5

CNW5

(WHT)

t

°

CN108

5

1

Wireless receiver

(Option)

WiFi adapter

(Option)

5

1

5

1

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

1 2 3 4 5 6

1

*1

5

Close

Open

N

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

F1

F2

M

2WV2a

MXV

MP2

MP1

M

1

~

1

3

CNV1 (WHT)

1

3

CNBHT

(BLK)

X11

X9

X8

X13

X10

X4

X14

X3

X2

X1

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

1

3

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN22 (BLU)

CNIT (BLU)

TAB1

CN01

(WHT)

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1

8

1

8

1

5

1 3

8

1

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

8

1

6

CN01

(WHT)

CN01 (WHT)

2

1

4 6

2

1

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1

3

1 2

CNBHT (BLK)

1

3

1 3

7

CNIH (ORN)

1

4

1

3

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

TBI.2

126 10148

137 11945321

6

4

2

1

CNIH (ORN)

MP3

M

1

~

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

1

357 91113

1

4

CN1A

(WHT)

2 4 6 8 10 12 14

1

357 91113

TBI.1

2WV2b

M

1

~

TBO.2

3WV

*1

3WV

M 1

~

4 5 6

TBO.2

2WV1

M 1

~

4 5 6

M

1

~

IN6

IN1

IN2

IN3

IN4

IN5

IN7

CNP4 (RED)

MP4

M

1

~

M

1

~

1

3

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



–+–+–

+

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

1

3

5

7

X6

X7

1

3

CNBC (GRY)

CNBH (WHT)

10

6 WIRING DIAGRAM

6-1. EHSC-MEC, EHSD-MEC, ERSC-MEC

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.

Symbol Name TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) 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)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

X1

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-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 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

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

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 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

Symbol Name TB1 Terminal block <Power supply, Outdoor unit> 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)

OCH571

NL

S3S2S1

NL

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply

~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

1

3

CN3C (BLU)

BLK

1

3

ORN

BRN

CN3C (BLU)

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

1

3

CN3C (BLU)

1

3

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

°

THW8

THW7

THW6

t

°

THW9

t

°

THWB1

t

°

THWB2

t

°

Main

controller

1 2

1

2

CN20

(RED)

TH1

t

°

1

3

CN21

(YLW)

TH2

t

°

1

4

THW1

THW2

CNW12

(RED)

t°t

°

1

2

THW5

CNW5

(WHT)

t

°

CN108

5

1

Wireless receiver

(Option)

WiFi adapter

(Option)

5

1

5

1

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

1 2 3 4 5 6

1

*1

5

Close

Open

N

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

F1

F2

M

2WV2a

MXV

MP2

MP1

M

1

~

1

3

CNV1

(WHT)

1

3

CNBHT

(BLK)

X11

X9

X8

X13

X10

X4

X14

X3

X2

X1

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

1

3

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN22 (BLU)

CNIT (BLU)

TAB1

CN01

(WHT)

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1

8

1

8

1

5

1 3

8

1

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

8

1

6

CN01 (WHT)

CN01

(WHT)

CN01 (WHT)

2

1

4 6

2

1

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1

3

1 2

CNBHT (BLK)

1

3

1 3

7

CNIH (ORN)

1

4

1

3

CNW5 (WHT)

CN21

(YLW)

CNW12

(RED)

CN20

(RED)

TBI.2

126 10148

137 11945321

6

4

2

1

CNIH (ORN)

MP3

M

1

~

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

1

357 91113

1

4

CN1A

(WHT)

2 4 6 8 10 12 14

1

357 91113

TBI.1

2WV2b

M

1

~

TBO.2

3WV

*1

3WV

M 1

~

4 5 6

TBO.2

2WV1

4 5 6



M

1

~

IN6

IN1

IN2

IN3

IN4

IN5

IN7

WHT

M 1

~

CNP4 (RED)

MP4

M

1

~

M

1

~

1

3

–+–+–

+

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2

2

ECB1

L (1)N(3)

BHCP

BLU

RED

WHT/No.2

WHT/No.1

RED

VLT

GRY

BHC1

BHT

642

531

A1

A2

BH1

BHF

2

4

Power supply

to Booster heater

642

531

A1

A2

CNBH (WHT)

CNBHT

(BLK)

2

CNBC (GRY)

1

3

1

3

~/N 230V 50Hz

1

3

5

7

X6

X7

1

3

CNBC (GRY)

CNBH (WHT)



11

6-2. EHSC-VM2C, EHSC-VM2EC, EHSD-VM2C, ERSC-VM2C, ERSD-VM2C, EHPX-VM2C

Symbol Name TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) 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)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

X1

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-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 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1

Standard operation

Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

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

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 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

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.

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 BHC1 Contactor for booster heater 1 BHCP Contactor for booster heater protection

OCH571

NL

S3S2S1

NL

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

1

3

BLK

1

3

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

1

3

CN3C (BLU)

1

3

CNPWM

(WHT)

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

°

THW8

THW7

THW6

t

°

THW9

t

°

THWB1

t

°

THWB2

t

°

Main

controller

1 2

1

2

CN20

(RED)

TH1

t

°

1

3

CN21

(YLW)

TH2

t

°

1

4

THW1

THW2

CNW12

(RED)

t°t

°

1

2

THW5

CNW5

(WHT)

t

°

CN108

5

1

Wireless receiver

(Option)

WiFi adapter

(Option)

5

1

5

1

CN22 (BLU)

1 2 3 4 5 6

1

*1

5

Close

Open

N

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

F1

F2

M

2WV2a

MXV

MP2

MP1

M

1

~

1

3

CNV1 (WHT)

1

3

CNBHT

(BLK)

X11

X9

X8

X13

X10

X4

X14

X3

X2

X1

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

1

3

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1

8

1

8

1

5

1 3

8

1

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

8

1

6

CN01 (WHT)

2

1

4 6

2

1

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1

3

1 2

CNBHT (BLK)

1

3

1 3

7

CNIH (ORN)

1

4

1

3

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

TBI.2

126 10148

137 11945321

6

4

2

1

CNIH (ORN)

MP3

M

1

~

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

1

357 91113

1

4

CN1A (WHT)

2 4 6 8 10 12 14

1

357 91113

TBI.1

2WV2b

M

1

~

TBO.2

3WV

*1

3WV

M

1

~

4 5 6

TBO.2

2WV1

4 5 6

M

1

~

M

1

~

IN6

IN1

IN2

IN3

IN4

IN5

IN7

WHT

CNP4 (RED)

MP4

M

1

~

M

1

~

1

3

1

3

5

7

X6

X7

1

3

CNBC (GRY)

CNBH (WHT)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

CNIT (BLU)

CN01 (WHT)

CN3C (BLU)

CN01 (WHT)

CN3C (BLU)

CN01

(WHT)

–

+–+–+

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2 2

2

ECB1

L (1)N(3)

BHCP

BLU

REDRED

BLU/No.3

WHT/No.2

WHT/No.1

BLU/No.4

RED

VLT

PNK

GRY

BHC2

BHC1

BHT

642

531

A1

A2

642

531

A1

A2

BH1

BHF

BH2

2

4

Power supply

to Booster heater

642

531

A1

A2

CNBH (WHT)

CNBHT

(BLK)

2

CNBC (GRY)

1

3

5

7

3

1

3

~/N 230V 50Hz

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



12

6-3. EHSC-VM6C, EHSC-VM6EC

Symbol Name 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.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) 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)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

X1

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-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 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may

be reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

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

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 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

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.

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

OCH571

NL

S3S2S1

NL

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

1

3

BLK

1

3

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

1

3

1

3

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

IN6

IN1

IN2

IN3

IN4

IN5

IN7

t°t

°

THW8

THW7

THW6

t

°

THW9

t

°

THWB1

t

°

THWB2

t

°

Main

controller

1 2

1

2

CN20

(RED)

TH1

t

°

1

3

CN21

(YLW)

TH2

t

°

1

4

THW1

THW2

CNW12

(RED)

t°t

°

1

2

THW5

CNW5

(WHT)

t

°

CN108

5

1

Wireless receiver

(Option)

WiFi adapter

(Option)

5

1

5

1

CN22 (BLU)

1 2 3 4 5 6

1

3

5

7

1

*1

5

Close

Open

N

X6

X15

X12

X7

TBO.4

TBO.3

TBO.2

TBO.1

F1

F2

M

2WV2a

MXV

MP2

MP1

M

1

~

1

3

1

3

CNV1 (WHT)

1

3

CNBHT

(BLK) CNBC (GRY)

CNBH (WHT)

X11

X9

X8

X13

X10

X4

X14

X3

X2

X1

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

1

3

CNP1 (WHT)

CNP4 (RED)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1

8

1

8

1

5

1 3

8

1

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

8

1

6

2

1

4 6

2

1

1 2 4 6

4 6

CNBH (WHT)

CNBC (GRY)

1

3

1 2

CNBHT (BLK)

1

3

1 3

7

CNIH (ORN)

TBI.2

126 10148

137 11945321

6

4

2

1

CNIH (ORN)

MP3

M

1

~

2 2 2

ECB1

L2 (3)L1(1)L3(5)

BHCP

BLK

WHT

WHTWHT

BLK

REDRED

BLU/No.4

WHT/No.2

WHT/No.3

WHT/No.1

BLU/No.5

BLU/No.6

RED

VLT

PNK

WHT

GRY

BHC2

BHC1

BHT

642

531

A1

A2

642

531

A1

A2

BH1

BHF

BH2

2

4 6

Power supply

to Booster heater

642

531

A1

A2

2

1

3

5

7

3

1

3

3~ 400V 50Hz

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

1

357 91113

2 4 6 8 10 12 14

1

357 91113

TBI.1

2WV2b

M

1

~

TBO.2

3WV

*1

3WV

M 1

~

4 5 6

TBO.2

2WV1

M 1

~

4 5 6



M

1

~

MP4

M

1

~

1

3

CNBHT (BLK)

CNBC (GRY)

CNBH (WHT)

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CN3C (BLU)

CNPWM

(WHT)

CNRF (WHT)

CN105

(RED)

CN22 (BLU)

CNIT

(BLU)

CN01 (WHT)

–

+–+–+

CN3C (BLU)

CN01

(WHT)

CN01

(WHT)

CN01 (WHT)

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

1 2

1

4

1

3

CNW5 (WHT)

CN21

(YLW)

CNW12

(RED)

CN20 (RED)

1

4

CN1A

(WHT)

M

1

~

13

6-4. EHSC-YM9C, EHSC-YM9EC, EHPX-YM9C

Symbol Name TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) 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)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1−3 Terminal block <Signal Inputs, Thermistor>

F1 Fuse (T10AL250V)

F2 Fuse (T6.3AL250V)

SW1−5 DIP switch *See Table 3

X1−15 Relay

LED1 Power supply (FTC5)

LED2 Power supply (Main controller)

LED3 Communication (FTC5-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 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

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

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 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

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.

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

OCH571

NL

S3S2S1

NL

S3S2S1

To outdoor

unit

TB1

ORN

YLW

GRN/YLW

To outdoor

unit

Power supply ~/N 230V 50Hz

TB1

ORN

BLU

RED

BLU

RED

YLW

GRN/YLW

1

3

BLK

1

3

ORN

BRN

ORN

BRN

YLW

Indoor unit powered

by independent source

Indoor unit powered

via outdoor unit

CIRCUIT

BREAKER

1

3

CN3C (BLU)

1

3

LED1

LED2

LED3

LED4

TBI.1

1310 12 141174 65 932 81

TBI.2

1310 12 141174 65 932 81

t°t

°

THW8

THW7

THW6

t

°

THW9

t

°

THWB1

t

°

THWB2

t

°

Main

controller

1 2

1

2

CN20

(RED)

TH1

t

°

1

3

CN21

(YLW)

TH2

t

°

1

4

THW1

THW2

CNW12

(RED)

t°t

°

1

2

THW5

CNW5

(WHT)

t

°

CN108

5

1

Wireless receiver

(Option)

WiFi adapter

(Option)

5

1

5

1

CN22 (BLU)

1 2 3 4 5 6

1

*1

5

Close

Open

N

X15

X12

TBO.4

TBO.3

TBO.2

TBO.1

F1

F2

M

2WV2a

MXV

MP2

MP1

M

1

~

1

3

CNV1 (WHT)

1

3

CNBHT

(BLK)

X11

X9

X8

X13

X10

X4

X14

X3

X2

X1

X5B

X5A

1 2 3 4 5 6 7 8

1 2 3 4 5 6

1

3

CNP1 (WHT)

CNPWM

(WHT)

TBO.1

TBO.2

TBO.3

TBO.4

TAB1

F2 F1

6.3A 250V 10A 250V

SW1

SW2

SW3

SW4

SW5

1

8

1

8

1

5

1 3

8

1

1 2 3 4 5 6

1 2 3 4 5 6 7 8

1 2 3 4 5 6

8

1

6

2

1

4 6

2

1

1 2 4 6

4 6

1

3

1 2

1

3

1 3

7

TBI.2

126 10148

137 11945321

6

4

2

1

CNIH

(ORN)

MP3

M

1

~

IN8

IN9

IN10

1310 12 141174 65 932 81

TBI.3

2 4 6 8 10 12 14

1

357 91113

2 4 6 8 10 12 14

1

357 91113

TBI.1

2WV2b

M

1

~

TBO.2

3WV

*1

3WV

M

1

~

4 5 6

TBO.2

2WV1

4 5 6



M

1

~

IN6

IN1

IN2

IN3

IN4

IN5

IN7

M 1

~

CNP4 (RED)

MP4

M

1

~

M

1

~

1

3

1

3

5

7

X6

X7

1

3

CNBC (GRY)

CNBH (WHT)

Signal output

(Boiler)

Signal output

(Error)

Signal output

(Defrost)

Signal output

(Comp ON)

Signal output

(Cooling)



–+–+–

+

CNPWM

(WHT)

CNRF (WHT)

CN105 (RED)

CN22 (BLU)

CNIT (BLU)

CN01

(WHT)

CNP1 (WHT)

CNP4 (RED)

CNV1 (WHT)

CNBH (WHT)

CNBC (GRY)

CNBHT (BLK)

CNIH (ORN)

CN3C (BLU)

CN01 (WHT)

CN01

(WHT)

Tool

Conductor

Outline view Top view

Connect them using either way as shown below.

2 2 2

ECB1

L2 (3)L1(1)L3(5)

BHCP

BLK

WHT

WHTWHT

BLK

REDRED

BLU/No.4

WHT/No.2

WHT/No.3

WHT/No.1

BLU/No.5

BLU/No.6

RED

VLT

PNK

GRY

BHC2

BHC1

BHT

642

531

A1

A2

642

531

A1

A2

BH1

BHF

BH2

2

4

6

Power supply

to Booster heater

642

531

A1

A2

2

1

3

5

7

3

1

3

3~ 230V 50Hz

CNBHT (BLK)

CNBC (GRY)

CNBH (WHT)

WHT



1 2

1

4

1

3

CNW5 (WHT)

CN21 (YLW)

CNW12

(RED)

CN20 (RED)

1

4

CN1A (WHT)

14

6-5. EHSC-TM9C

Symbol Name TH1 Thermistor (Room temp.)(Option) TH2 Thermistor (Ref. liquid temp.) THW1 Thermistor (Flow water temp.) THW2 Thermistor (Return water temp.) THW5 Thermistor (DHW tank water temp.)(Option) THW6 Thermistor (Zone1 ow temp.)(Option) THW7 Thermistor (Zone1 return temp.)(Option) THW8 Thermistor (Zone2 ow temp.)(Option) THW9 Thermistor (Zone2 return temp.)(Option) THWB1 Thermistor (Boiler ow temp.)(Option) THWB2 Thermistor (Boiler return temp.)(Option) 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)

FLOW TEMP. CONTROLLER (FTC5)

TBO.1−4

Terminal block <Outputs>

TBI.1

−

3 Terminal block <Signal Inputs, Thermistor> F1 Fuse (T10AL250V) F2 Fuse (T6.3AL250V) SW1

−

5 DIP switch *See Table 3

X1

−

15 Relay

LED1 Power supply (FTC5) LED2 Power supply (Main controller) LED3 Communication (FTC5-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 13-14 — Room thermostat 1 input Refer to SW2-1 in <Table 3 DIP Switch Functions>. IN2 TBI.1 11-12 — Flow switch 1 input Refer to SW2-2 in <Table 3 DIP Switch Functions>. IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <Table 3 DIP Switch Functions>. IN4 TBI.1 7-8 — Demand control input Normal Heat source OFF/ Boiler operation *2 IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 3-4 — Room thermostat 2 input Refer to SW3-1 in <Table 3 DIP Switch Functions>. IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <Table 3 DIP Switch Functions>. IN8 TBI.3 1-2 — Electric energy meter 1

Refer to installation manual.IN9 TBI.3 3-4 — Electric energy meter 2

IN10

TBI.3 5-6 — Heat meter

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be

reduced.

*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the

service menu.

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

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 5-6 — Cooling signal output OFF ON

OUT9

TBO.4 3-4 CNIH Immersion heater output OFF ON

OUT10

TBO.3 1-2 — Boiler output OFF ON

OUT11

TBO.3 3-4 — Error output Normal Error

OUT12

TBO.3 5-6 — Defrost output Normal Defrost

OUT13

TBO.4 1-2 — 2-way valve 2a output *2 OFF ON

OUT14

— CNP4 Water circulation pump 4 output (DHW) OFF ON

OUT15

TBO.3 7-8 — Comp ON signal OFF ON

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

*1. For 2-zone temperature control. *2. For 2-zone valve ON/OFF control.

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.

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

OCH571

15

Automatic switch to heat source only operation

Back-up heat source operation (*1) will automatically run when the outdoor unit stops abnormally. To enable the function, switch DIP SW 2-5 to ON. During the back-up operation, an error code(s) and the contact number will be displayed alternately. External output (OUT11) will be available. To clear the fault(s), reset the power breakers on the indoor and outdoor units.

E6 to E9, ED, P6, P8, U1 to U8, UD, UE, UF, UL, UP

(*1) Prolonged running of the back-up operation may affect the life of the heat source. (*2) For safety reasons, this function is not available for certain faults. (System operation must be stopped and only pump keeps running.)

6-6. DIP switch setting

Located on the FTC printed circuit board are 5 sets of small white switches known as DIP switches. The DIP switch number is printed on the circuit board next to the relevant switches. 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 in the table below. 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 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*C ON : E***-*M2/6/9C

SW1-6 Booster heater function For heating only For heating and DHW

OFF: E***-M*C ON : E***-*M2/6/9C

SW1-7 Outdoor unit type Split type Packaged type

OFF: E*S*-*M*C ON : EHPX-*M*C

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*C ON : E***-VM2*C

SW2-4 Cooling mode function Inactive Active

OFF: Except ERS*-*M**C ON : ERS*-*M**C

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 *6 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 input (IN3) logic change Failure detection at short Failure detection at open OFF

SW3-3 Flow switch 3 input (IN7) logic change Failure detection at short Failure detection at open OFF

SW3-4 Electric energy meter WITHOUT Electric energy meter WITH Electric energy meter OFF SW3-5 Heating mode function *3 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 *7 Slave Master OFF

SW4-3 — — — OFF

SW4-4

Indoor unit only operation (during installation work) *4

Inactive Active OFF

SW4-5 Emergency mode (Heater only operation) Normal

Emergency mode (Heater only operation)

OFF *5

SW4-6 Emergency mode (Boiler operation) Normal Emergency mode (Boiler operation) OFF *5

SW5

SW5-1

DHW tank water temperature over heat protection (L4)

Active Inactive *8 OFF

SW5-2 — — — OFF

SW5-3

SW5-4

SW5-5

SW5-6

SW5-7

SW5-8 — — — OFF

Note:

*1. When the hydrobox is connected with a PUHZ-RP/SUHZ-SW 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 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. *4. Space heating and DHW can be operated only in indoor unit, like an electric boiler. (Refer to “Indoor unit only operation” in page 40. ) *5. If emergency mode is no longer required, return the switch to OFF position. *6. Active only when SW3-6 is set to OFF. *7. Active only when SW4-1 is set to ON. *8.

Please make sure to have necessary overheat protection on locally supplied solar thermal system side to secure safety, as the tank temperature coulld be much higher (than current).

SW1

SW3

SW4

SW2

SW5

SW5-3 SW5-4 SW5-5 SW5-6 SW5-7 E*SC-*M*C ON ON ON ON OFF E*SD-*M*C ON OFF OFF ON OFF EHPX-*M*C OFF OFF OFF OFF OFF

Capacity code

OCH571

L

N

S1

S2

S3

S1

S2

S3

TB1

L

N

ECB1

L

N

L1

L2

S1

S2

S3

S1

S2

S3

TB1

L2

L3

ECB1

N

L3

L1

L2

L1

16

FIELD WIRING

7

Breaker abbreviation Meaning

ECB1 Earth leakage circuit breaker for booster heater TB1 Terminal block 1

Earth

leakage

circuit

breaker

*1

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

Earth

leakage

circuit

breaker

*1

Outdoor unit

Power supply 3~ 400 V 50 Hz (EH**-YM9(E)C) 3~ 230 V 50 Hz (EHSC-TM9C)

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

Option 1: Hydrobox powered via outdoor unit

<1 phase>

Electrical connections 1 phase

Description

Power supply

Capacity

Breaker Wiring

Booster heater (Primary circuit)

~/N 230 V

50 Hz

2 kW 16 A *1 2.5 mm² 6 kW 32 A *1 6.0 mm²

*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.

<3 phase>

Electrical connections 3 phase

Wiring

Wiring No.

× size (mm²)

Hydrobox - Outdoor unit *2 3 × 1.5 (polar)

Hydrobox - Outdoor unit earth *2 1 × Min. 1.5

Circuit

rating

Hydrobox - Outdoor unit S1 - S2 *3 230 V AC

Hydrobox - Outdoor unit S2 - S3 *3 24 V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 45 m

If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m

*3. The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

2.Indoorunit/outdoorunitconnectingcordsshallnotbelighterthan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.

Afx label A 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 *1 2.5 mm²

3~ 230 V

50 Hz

9 kW 32 A *1 6.0 mm²

OCH571

S1

S2

S3

L

N

L

N

CN01

S1

S2

S3

L

N

S1

S2

S3

S1

S2

S3

TB1

L

N

ECB1

L

N

L1

L2

S1

S2

S3

S1

S2

S3

TB1

L2

L3

ECB1

N

L3

L1

L

N

17

For booster heater (Primary circuit)

To control board

Outdoor unit

Wiring circuit

breaker or

Isolating

switch

Earth

leakage

circuit

breaker

*1

Power

supply ~/ N 230 V 50 Hz

Power

supply ~/ N 230 V 50 Hz

Earth

leakage

circuit

breaker

*1

Wiring circuit

breaker or

Isolating

switch

Wiring

circuit

breaker or

Isolating

switch

Power

supply ~/ N 230V 50Hz

Hydrobox

Initial settings

(Power supplied

by outdoor unit)

Modied settings

(Separate power

supply to

the hydrobox)

BLACK

YELLOW

BLACK

YELLOW

BLACK

Hydrobox

control board

White

Earth

leakage

circuit

breaker

*1

Outdoor unit

Power

supply 3N~ 400 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

Earth

leakage

circuit

breaker

*1

Wiring circuit

breaker or

Isolating

switch

Power supply

3~ 400 V 50 Hz (EH**-YM9(E)C) 3~ 230 V 50 Hz (EHSC-TM9C)

Hydrobox

control board

Option2: Hydrobox powered by independent source

If the hydrobox and outdoor units have separate power supplies, the following requirements

MUST be carried out:

•Changeconnectorconnectionsinhydroboxcontrolandelectricalbox(seeFigure7-3).

•TurntheoutdoorunitDIPswitchSW8-3toON.

•TurnontheoutdoorunitBEFOREthehydrobox.

•Power by independentsourceis not availableforparticular models ofoutdoorunit

model. For more detail, refer to the connecting outdoor unit installation manual.

<1 phase>

Electrical connections 1 phase

*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.

<3 phase>

Electrical connections 3 phase

Hydrobox power supply ~/N 230 V 50 Hz

Hydrobox input capacity

Main switch (Breaker)

*1

16 A

Wiring

Wiring No.

× size (mm²)

Hydrobox power supply 2 × Min. 1.5 Hydrobox power supply earth 1 × Min. 1.5

Hydrobox - Outdoor unit *2 2 × Min. 0.3 Hydrobox - Outdoor unit earth —

Circuit

rating

Hydrobox L - N *3 230 V AC

Hydrobox - Outdoor unit S1 - S2 *3 — Hydrobox - Outdoor unit S2 - S3 *3 24 V DC

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.

*1. A breaker with at least 3.0 mm contact separation in each pole

shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 120 m

*3. The values given in the table above are not always measured

against the ground value.

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 *1 2.5 mm²

3~ 230 V

50 Hz

9 kW 32 A *1 6.0 mm²

Description Power supply

Capacity

Breaker

Wiring

Booster heater (Primary circuit)

~/N 230 V

50 Hz

2 kW 16 A *1 2.5 mm² 6 kW 32 A *1 6.0 mm²

OCH571

Pa

18

22

25

23

24

*1

26

7

6

5

8

9

10

11

12

13

15

16

20

21

27

3

19

26

28

4

25

26

Pa

18

19

22

25

23

24

5

3

17

9

10

11

12

13

15

16

20

27

4

6

7

8

*1

25

26

21

18

WATER SYSTEM DIAGRAM

8

Note

• Be sure to follow your local regulations to perform system conguration of the DHW connec-

tions.

• 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 all relief valves 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.

<EHS*> (Split model system) <ERS*> (Split model system for heating and cooling)

<EHPX> (Packaged model system)

Local

system

Refrigerant pipe

Water supply

DHW

Drain

Cold

water

Cold

water

Water pipe

Hydrobox

Flare connections

Local

system

No.

Part name

EHS*MEC

EHS**M*C

EHSC*M*EC

ERS*VM2C

ERSCMEC

EHPX*M*C

1

Control and electrical box

2 Main controller

3

Plate heat exchanger (Refrigerant - Water)

-

4

Water circulation pump 1

5 Pump valve

6

Drain cock (Primary circuit)

7 Booster heater 1, 2

- -

8 Flow sensor

9 Manometer

10

Pressure relief valve (3 bar)

11 Automatic air vent

12 Expansion vessel

- - -

13 Strainer valve

14 Drain pan

- - - -

15 THW1

16 THW2

17 TH2

-

18

THW5 (Optional part PACTH011TK-E or PAC-

TH011TKL-E)

- - - - - -

19 Outdoor unit

- - - - - -

20

Drain pipe (Local supply)

- - - - - -

21

3-way valve (Local supply)

- - - - - -

22

DHW indirect unvented

tank (Local supply)

- - - - - -

23

Cold water inlet pipe (Local supply)

- - - - - -

24

DHW outlet pipe

(Local supply)

- - - - - -

25

Back ow prevention device (Local supply)

- - - - - -

26

Isolating valve (Local supply)

- - - - - -

27

Magnetic lter (Local supply)

(Recommended)

- - - - - -

28 Strainer (Local supply)

- - - - - -

*1 Refer to the following section [Local system].

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19

1-zone temperature control

2-zone temperature control 1-zone temperature control with boiler

2-zone temperature control with boiler

1-zone temperature control (2-zone valve ON/OFF control)

Local system

3

7

5

2

4

6

8

9

11

1

12

10

11

Zone1

Zone2

1

2

3

5

6

4

Zone1

1

5

4

3

6

2

13

14

15

Zone1

2

13

14

15

7

5

4

3

6

1

8

9

10

11

12

Zone1

Zone2

*

Flow switch specications: DC12 V / 1 mA / Both normally-open and normally-closed types can be used. (Set DIP switch 3 to select the logics. Refer to “ 6-6 DIP switch setting”.)

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. Zone1 ow switch (local supply) *

7. Motorized mixing valve (local supply)

8. Zone2 ow water temp. thermistor (THW8)

9. Zone2 return water temp. thermistor (THW9)

Optional part : PAC-TH011-E

10. Zone2 water circulation pump (local supply)

11. Zone2 ow switch (local supply) *

12. Zone2 heat emitters (e.g. underoor heating) (local supply)

13. Boiler ow water temp. thermistor (THWB1)

14. Boiler return water temp. thermistor (THWB2)

15. Boiler

16. Zone1 2-way valve (local supply)

17. Zone2 2-way valve (local supply)

18. Bypass valve (local supply)

Optional part : PAC-TH011HT-E

1

Zone1

16

18

Zone1

Zone2

17

OCH571

20

1. Check all connections including factory tted ones are tight.

2. Insulate pipe work between hydrobox and outdoor unit.

3. Thoroughly clean and ush, system of all debris. (Refer to 4.2 in the installation manual.)

4. Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary. Always usea llingloop withdoublecheck valvewhen llingthe

primarycircuittoavoidbackowcontaminationofwatersupply.

•

Anti-freeze should always be used for package systems. It is the responsibility of the installer to decide if anti-freeze solution should be used in split systems depending on each site’s conditions. Corrosion inhibitor should be used in both split and package systems.

•

When connecting metal pipes of different materials insulate the joints to prevent a corrosive reaction taking place which will damage the pipework.

5. Check for leaks. If leaks are found, retighten the screws on the connections.

6. Pressurise system to 1 bar.

7. Release all trapped air using air vents during and following heating period.

8. Top up with water as necessary. (If pressure falls below 1 bar)

Filling the System (Primary Circuit)

Draining the Hydrobox

WARNING: DRAINED WATER MAY BE VERY HOT

1. Before attempting to drain the hydrobox islolate from the electrical supply to prevent booster heater burning out.

2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.

3. Drain any remaining water from booster heater using tted drain cock and hose, and the drain valve on the primary circuit to safely drain the unit.

4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.

• Strainer (Remove the strainer cover.)

• Pressure relief valve (Operate the valve.)

OCH571

21

CONTROLS

9

9-1. Main Controller

F1 F2 F3 F4

B C D

E

A

Main screen

Letter Name Function

A Screen Screen in which all information is displayed B Menu Access to system settings for initial set up and

modications.

C Back Return to previous menu. D Conrm Used to select or save. (Enter key) E Power/Holiday If system is switched off pressing once will turn

system on. Pressing again when system is switched on will enable Holiday Mode. Holding the button down for 3 secs will turn the system off. (*1)

F1-4 Function keys Used to scroll through menu and adjust settings.

Function is determined by the menu screen visible on screen A.

*1 When the system is switched off or the power supply is disconnected, the hydrobox protection functions (e.g. freeze stat. function) will NOT operate. Please beware that without these safety functions enabled the hydrobox may potentially become exposed to damage.

Icon Description

1 Legionella

prevention

When this icon is displayed ‘Legionella prevention mode’ is active.

2 Heat pump

‘Heat pump’ is running.

Defrosting

Emergency heating

3 Electric heater When this icon is displayed the ‘Electric heaters’

(booster or immersion heater) are in use.

4 Target

temperature

Target ow temperature

Target room temperature

Compensation curve

5 OPTION Pressing the function button below this icon will dis-

play the option screen. 6 + Increase desired temperature. 7 - Decrease desired temperature. 8 Z1

Z2 Pressing the function button below this icon switch-

es between Zone1 and Zone2.

Information Pressing the function button below this icon displays

the information screen. 9 Space heat-

ing/cooling

mode

Heating mode

Zone1 or Zone2

Cooling mode

10 DHW mode Normal or ECO mode 11 Holiday mode

When this icon is displayed ‘Holiday mode’ activated.

12 Timer

Prohibited

Server control

Stand-by

Stand-by (*2)

Stop

Operating

13

Current temperature

Current room temperature

Current water temperature of DHW tank

14

The Menu button is locked or the switching of the

operation modes between DHW and Heating opera-

tions are disabled in the Option screen.(*3)

15

SD memory card is inserted. Normal operation.

SD memory card is inserted. Abnormal operation.

*2 This unit is in Stand-by whilst other indoor unit(s) is in operation by

priority.

*3 To lock or unlock the Menu, press the BACK and CONFIRM keys

simultaneously for 3 seconds.

12 11

1 32

10

9

4

7

6

5

15 14

13

8

OCH571

22

9-2. Setting the Main Controller

After the power has been connected to the outdoor and hydrobox (See section 7) the initial system settings can be entered via the main controller.

1. Check all breakers and other safety devices are correctly installed and turn on power to the system.

2. When the main controller switched on for the rst time, the screen automatically goes to Initial settings menu, Language setting screen and Date/Time setting

screen in order.

3. Main controller will automatically start up. Wait approximately 6 minutes whilst the control menus load.

4. When the controller is ready a blank screen with a line running across the top will be displayed.

5. Press button E (Power) (refer to page 21) to turn on the system. Before turning on the system, perform initial settings as instructed below.

General Operation

● To nd the icon that you wish to set, use the F2 and F3 buttons to move between the icons.

● The highlighted icon will appear as a larger version of the center of the screen.

● Press CONFIRM to select and edit the highlighted mode.

●

Follow the <Main Controller Menu Tree> for further setting, using

▼

buttons for scrolling or F1 to F4 for selecting.

9-3. Main Settings Menu

The main settings menu can be accessed by pressing the MENU button. To reduce the risk of untrained end users altering the settings accidentally there are two access levels to the main settings; and the service section menu is password

protected.

User Level – Short press

If the MENU button is pressed once for a short time the main settings will be displayed but without the edit function. This will enable the user to view current settings but NOT change the parameters.

Installer Level – Long press

If the MENU button is pressed down for 3 secs the main settings will be displayed with all functionality available.

The following items can be viewed and/or edited (dependent on access level).

• Domestic Hot water (DHW)

• Heating/Cooling

• Schedule timer

• Holiday mode

• Initial settings

• Service (Password protected)

Main menu

Long Press

OCH571

23

Unrestricted access

Installer only

Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

* Short press for 1 Zone system.

*

F4

Schedule

timer preview

F4

Schedule

timer preview

F4

Schedule

timer preview

F4

Schedule

timer preview

F4

Schedule

timer preview

F4

Schedule

timer preview

F4

Schedule

timer preview

Main

menu

Main

menu

Main screen

Initial

Information

Option

F1

F4

Forced DHW

Hot Water (DHW)

<See

section>

<See

section>

<See

section>

<See

section>

Menu

Long Press

Short Press

Heating/Cooling

Holiday

mode

Initial

settings

Schedule timer

(Zone1)

(Zone2)

(

PREVIEW

)

(

EDIT

)

(

EDIT

)

(

EDIT

)

(

EDIT

)

DHW

Legionella

Schedule2 period

preview screen

Schedule2 period setting screen1

Term setting

Schedule1/2 select

F4

Schedule

timer preview

F4

Schedule timer preview

F4

Schedule timer preview

Zone1

Zone2

Curve parameters

Adjustment

Zone1

Zone2

Day select

Time select

Temp.setting

Schedule1

Schedule2

Heating

DHW

ON (

)/OFF

DHW ON (

)/Prohibited ( )/Timer ( )

Heating/Cooling ON (

)/Prohibited ( )/Timer ( )

Energy monitor

Consumed electrical energy

Delivered energy

Normal/Eco

DHW max. temp.

Hot water temp.

Frequency Start time Max. operation time Duration of max. temp.

DHW max. temp. drop DHW max. operation time DHW mode restriction

Active/Non active

Heating room temp.( ) / Heating ow temp.(

)

/ Heating compensation curve(

) / Cooling ow temp.

Heating room temp.(

) / Heating ow temp.(

)

/ Heating compensation curve(

) / Cooling ow temp.

Compensation curve preview

Compensation curve edit

F1

F3

F1

F2

F2 F4

F3

F4

F3

F4

F2

F4

F3

F4

F2

F3

F4

DHW

Date/Time yyyy/mm/dd/hh:mm

EN/FR/DE/SV/ES/IT/DA/NL/FI/NO/PT/BG/PL/CS/RU

OFF/Room/Tank/Room&Tank

OFF/ON

hh:mm/hh:mm AM/AM hh:mm

°C/°F

Room RC zone select

Sensor setting

Zone1

Zone2

Holiday mode setting

Heating room temp.

Heating ow temp.

Zone2

Sensor setting

Select Time/Zone

TH1/Main controller/ Room RC1-8/ “Time/ Zone”

Time setting

Sensor setting

Language

Summer time

Temp. display

Contact number

Time display

°C/°F

Room sensor settings

Heating/ Cooling

Active/Non active Active/Non active

Long press

(

EDIT

)

F1 F2

Zone1/2 select

F1 F2

Zone1/2 select

F1

Zone1/2 select

F1

Zone1/2 select

F1 F2

Zone1/2 select

save

Cooling ow temp.

Time select

Temp.setting

Time select

Temp.setting

Time select

Temp.setting

Time select

Cooling

Zone1

Zone2

Day select

Time select

Temp.setting

F1

Zone1/2 select

save

Time select

Temp.setting

Cooling

Zone1

Zone2

Day select

Time select

Temp.setting

F1

Zone1/2 select

save

Time select

Temp.setting

OCH571

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Unrestricted access

Installer only

Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

Long press

Main screen

Initial

Main menu

Service

Password

protected

Manual operation

Function settings

Thermistor adjustment

Economy settings for pump

Electric heater (Heating)

Electric heater (DHW)

Mixing valve control

Flow sensor

Standard (Heat pump & electric heater)/Heater (Electric heater only)/ Boiler/Hybrid (Heat pump & heater/Boiler)

Freeze stat function

Simultaneous operation

Cold weather function

Boiler settings *1

Energy monitor settings

External input settings

Running information

Thermistor reading

Summary of settings

Error history

Password protection

Manual reset

SD card

Heating

operation

H/P thermo diff.adjust

Flow temp.range

Room temp.control

Auxiliary settings

Heat source setting

Pump speed

Operation settings

ON/OFF Delay

Running

Interval

Flow t.

Ambient

ON/OFF Ambient

ON/OFF

Hybrid

settings

Ambient

Energy

price

CO

2

emission

Heat source

Schedule

Electricity

Heat pump capacity

ON/OFF

Electric heater capacity

Demand control (IN4)

Main controller

SD

Yes/No

Select download data

OFF (Heat source)/Boiler

Heater/Boiler

Outdoor thermostat (IN5)

FTC

Main RC SD

Yes/No

Select upload data

Water pump input

Electric energy meter

Booster heater 1 capacity

Pump 1

Booster heater 2 capacity

Pump 2

Immersion heater

Pump 3

Boiler

Boiler efciency

Target temp.

Start & Finish

Temp. increase step

Temp. decrease step

Max. temp. Max. temp. period

Increase interval

Decrease interval

Booster heater 2 capacity

Booster heater 1 capacity

Flow temp.

(Increase)

Flow temp.

(Decrease)

Priority Ambient/

Cost /CO

2

Ambient

Intelligent settings

Min.temp.

ON/OFF

Mode Interval

Max.temp.

Lower limit

Upper limit

Minimum Maximum

Delay

ON/OFF

(Booster heater/Immersion heater)

*1 For more details, refer to the installation manual of PAC-TH011HT-E.

Floor dry up function

For more details,

refer to Page 28.

(

F1 F2 F3

Menu

Long Press

Delivered energy adjustment

Heat meter

Main RC

OCH571

25

The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason password protection is required to prevent unauthorised access to the service settings.

The factory default password is "0000". Follow the procedure described in General Operation for the set up operation.

The service menu is navigated using the F1 and F2 buttons to scroll through the functions. The menu is split across two screens and is comprised of the following functions;

1. Manual operation

2. Function settings

3. Thermistor adjustment

4. Auxiliary settings

5. Heat source setting

6. Pump speed

7. Operation settings

8. Energy monitor settings

9. External input settings

10. Running information

11. Thermistor reading

12. Summary of settings

13. Error history

14. Password protection

15. Manual reset

16. SD card

9-4. Service Menu

During the lling of the system the water circulation pump and 3-way valve can be manually overridden using manual operation mode.

When manual operation is selected a small timer icon appears in the screen.

The function selected will only remain in manual operation for a maximum of 2

hours. This is to prevent accidental permanent override of the FTC.

►Example Pressing F3 button will switch manual operation mode ON for the main 3-way valve. When lling of the DHW tank is complete the installer should access this menu again and press F3 to deactivate manual operation of the part. Alternatively after 2 hours manual operation mode will no longer be active and FTC will resume control of the part.

Many functions can not be set whilst the indoor unit is running. The installer should turn off the unit before trying to set these functions. If the installer attempts to change the settings whilst the unit is running the main controller will display a reminder message prompting the installer to stop operation before continuing. By selecting “Yes” the unit will cease operation.

Manual operation and heat source setting can not be selected if the system is running. A screen will be displayed asking the installer to stop the system

before these modes can be activated. The system automatically stops 2 hours after last operation.

Being

selected

Being running Error

indication

Manual operation menu screen

Function Setting allows the setting of auto recovery after power failure only.

1. From the service menu use F1 and F2 to highlight Function Setting.

2. Press CONFIRM.

3. Ensure the Ref address and unit number are displayed to the right.

4. Press CONFIRM.

5. Use F3 and F4 to highlight either 1/2/3 (see below). Note: Changes can ONLY be made to Mode 1.

6. Press CONFIRM.

Mode 1 Setting number meanings 1 - Power failure automatic recovery NOT available 2 - Power failure automatic recovery AVAILABLE

(Approx 4-minute delay after power is restored.)

3 - NO FUNCTION

OCH571

▼

▲

26

This function allows adjustments to be made to the thermistor readings from

-10 – 10 °C in 0.5 °C intervals.

THW1: Thermistor (Flow water temp.) THW2: Thermistor (Return water temp.) THW5: Thermistor (DHW tank water temp.)(Option) THW6: Thermistor (Zone1 ow temp.)(Option) THW7: Thermistor (Zone1 return temp.)(Option) THW8: Thermistor (Zone2 ow temp.)(Option) THW9: Thermistor (Zone2 return temp.)(Option) THWB1: Thermistor (Boiler ow temp.)(Option) THWB2: Thermistor (Boiler return temp.)(Option)

This function is used to set the parameters for any auxiliary parts used in the system

Menu subtitle Function/ Description

Economy settings for

pump

Water pump stops automatically in certain period of time from

when operation is nished.

Delay Time before pump switched off*1

Electric heater

(Heating)

To select “WITH booster heater (ON)” or “WITHOUT booster

heater (OFF)” in Heating mode.

Delay The minimum time required for the booster heater to turn ON

from after Heating mode has started.

Electric heater (DHW) To select "WITH (ON)" or "WITHOUT (OFF)" booster heater or

immersion heater individually in DHW mode.

Delay The minimum time required for the booster heater or immersion

heater to turn ON from after DHW mode has started. (This

setting is applied for both booster and immersion heater.)

Mixing

valve control *2

Running Period from valve fully open (at a hot water mixing ratio of 100%)

to valve fully closed (at a cold water mixing ratio of 100%)

Interval Interval (min) to control the Mixing valve.

Flow

sensor *3

Minimum The minimum ow rate to be detected at Flow sensor. Maximum The maximum ow rate to be detected at Flow sensor.

*1. Decreasing "time before pump switched off" may increase the duration of stand-by in

Heating/Cooling mode.

*2.

Set the Running time according to the specications of the actuator of each mixing valve.

It is recommended to set the interval to 2 minutes that is a default value. With the interval

set longer, it could take longer to warm up a room.

*3.

Do not change the setting since it is set according to the specication of Flow sensor

attached to the hydrobox.

Economy settings for pump

1. From the Auxiliary settings menu highlight Economy Settings for water circulation pump.

2. Press CONFIRM.

3. The economy settings for water circulation pump screen is displayed.

4. Use button F1 to switch the economy settings ON/OFF.

5. Use buttons F3 and F4 to adjust the time the water circulation pump will run. (3 - 60

minutes)

Auxiliary settings menu screen

Electric heater (Heating) screen

Electric heater (DHW) screen

Electric heater (Heating)

1. From the Auxiliary settings menu highlight Electric heater (Heating).

2. Press CONFIRM.

3. The Electric heater (Heating) screen is displayed.

4. Press F1 button to switch the function ON/OFF.

5. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater will assist in space heating. (5 -180minutes)

Electric heater (DHW)

1. From the Auxiliary settings menu highlight Electric heater (DHW).

2. Press CONFIRM.

3. The Electric heater (DHW) screen is displayed.

4. Press F1 button to switch the function ON/OFF.

5. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater and the immersion heater (if present) will assist in DHW heating. (15 -30minutes)

Economy settings for pump screen

OCH571

Mitsubishi EHSD-VM2C.UK, EHSC-VM2EC.UK, EHSC-MEC.UK, EHSC-VM2C.UK, EHSC-VM6C.UK Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual