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6-2. EHSD-VM2D.UK, ERSD-VM2D.UK, EHSC-VM2D.UK, ERSC-VM2D.UK, EHPX-VM2D.UK, ERPX-VM2D.UK
Power supply
to Booster heater
~/N 230V 50Hz
L
N
(1)
(3)
ECB1
2 4
1
3
5
A1
BHCP
A2
2
4
6
BHC1
1
3
5
A1
2
4
6
A2
BH1
2
2
BHT
BHF
2
2
1
3
1
2
3
2
1
3
Table 1 Signal Inputs
Name Terminal block Connector
Item
IN1
TBI.1 7-8
—
Room thermostat 1 input *1
IN2
TBI.1 5-6
—
Flow switch 1 input
IN3
TBI.1 3-4
—
Flow switch 2 input (Zone1)
IN4
TBI.1 1-2
—
Demand control input
IN5
TBI.2 7-8
—
Outdoor thermostat input *2
IN6
TBI.2 5-6
—
Room thermostat 2 input *1
IN7
TBI.2 3-4
—
Flow switch 3 input (Zone2)
IN8
TBI.3 7-8
—
Electric energy meter 1
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
Water circulation pump 1 output
OUT1
TBO.1 1-2 CNP1
(Space heating/cooling & DHW)
Water circulation pump 2 output
OUT2
TBO.1 3-4
—
(Space heating/cooling for Zone1)
Water circulation pump 3 output
OUT3
TBO.1 5-6
—
(Space heating/cooling for Zone2) *1
2-way valve 2b output *2
TBO.2 4-6 CNV1 3-way valve (2-way valve) output
OUT4
—
CN851 3-way valve output
TBO.2 1-2
OUT5
—
Mixing valve output *1
TBO.2 2-3
OUT6
—
CNBH 1-3 Booster heater 1 output
OUT7
—
CNBH 5-7 Booster heater 2 output
OUT8
TBO.4 7-8
—
Cooling signal output
OUT9
TBO.4 5-6 CNIH Immersion heater output
OUT10 TBO.3 1-2
—
Boiler output
OUT11 TBO.3 5-6
—
Error output
OUT12 TBO.3 7-8
—
Defrost output
OUT13 TBO.4 3-4
—
2-way valve 2a output *2
Water circulation pump 4 output
OUT14
—
CNP4
(DHW)
OUT15 TBO.4 1-2
—
Comp. ON signal
OUT16 TBO.3 3-4
—
Thermo ON signal
OUTA1
TBI.4 7-8
—
Analog output
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.
OCH712C
CNPWM
(WH)
1
3
3
CNP1
TBO.1
(WH)
1
1
M
1~
2
M
MP1
3
1~
3
M
2WV2b
1~
4
MP2
5
M
1~
6
MP3
1
M
1~
MP4
3
CNP4
(RD)
TBO.2
Close
1
M
N
2
1~
Open
MXV
3
4
M
5
1~
6
3WV
CNV1
(WH)
4
5
6
1
TBO.2
3
M
1~
5
2WV1
TBO.3
Signal output
1
(Boiler)
2
3
Signal output
(thermo on)
4
5
Signal output
(Error)
6
7
Signal output
(Defrost)
8
TBO.4
1
Signal output
(Comp. on)
2
3
M
1~
4
2WV2a
5
6
7
Signal output
(Cooling)
8
CNBHT
(BK)
1
3
CNBHT
CNBC
(BK)
(GY)
1
CNBC
3
(GY)
CNBH
(WH)
1
3
CNBH
5
(WH)
7
TAB1
CN401
CNW5
CNW12
CN21
(WH)
(BU)
(RD)
(YE)
1
4
1
4
1
1
4
t°
t°
t°
t°
THW5B
THW1
THW2
TH2
OFF (Open)
ON (Short)
Refer to SW2-1 in
<Table 6.6.1 DIP Switch Functions>.
Refer to SW2-2 in
<Table 6.6.1 DIP Switch Functions>.
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
Heat source OFF/
Normal
Boiler operation *3
Standard opera-
Heater operation/
tion
Boiler operation *3
Refer to SW3-1 in
<Table 6.6.1 DIP Switch Functions>.
Refer to SW3-2 in
<Table 6.6.1 DIP Switch Functions>.
Refer to installation manual.
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Heating
DHW
Close
Stop
Open
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Normal
Error
Normal Defrost
OFF
ON
OFF
ON
OFF
ON
OFF
ON
0V-10V
CN01
(BK)
1
<How to use TBO.1 to 4>
3
Connect them using either way as shown below.
F1
5
F2
X1
X2
Conductor
Outline view
X3
FTC board
X14
TBO.1
1
2
3
1
CNP1
X5A
4
3
(WH)
5
6
X5B
1
1
CNP4
TBO.2
1
3
(RD)
2
SW5
3
X4
4
5
8
6
1
1
CNV1
3
1
TBO.3
(WH)
5
SW4
2
3
X10
6
4
1
5
X16
6
7
SW3
8
X11
TBO.4
1
8
2
X12
1
3
4
5
SW2
X15
6
7
X13
8
8
1
1
CNIH
(OG)
1
3
X9
1
1
SW1
CNBHT
CNBC
SW6
(BK)
X8
(GY)
3
3
5
8
1
3
CNBH
5
(WH)
7
TAB1
CN401
X6
(WH)
1
X7
4
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
TBI.1
TBI.2
TBI.3
CN20
TBI.1
TBI.2
(RD)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
3
1
2
-
+
t°
TH1
TH
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN10
Symbol
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
12
Indoor unit powered
via outdoor unit
To outdoor
unit
Tool
Tool
Conductor
L
N
S1
S2
S3
Top view
1
CN01
3
(BK)
5
1
CN01
F2
F1
3
(BK)
IEC T6.3AL250V
IEC T10AL250V
5
1
CN3C
(BU)
3
LED1
BN
1
1
CN3C
CNPWM
OG
(BU)
3
(WH)
3
1
CN851
(BK)
8
1
CNRF
Wireless receiver
(WH)
(Option)
LED2
5
1
WiFi adapter
CN105
LED3
(RD)
(Option)
5
1
CNIT
(BU)
5
CN22
1
(BU)
2
CN108
LED4
CN1A
CNW5
CNW12
CN21
CN20
(WH)
(BU)
(RD)
(YE)
(RD)
1
1
1
1
1
2
3
4
4
4
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
TBI.6
TBI.4
TBI.5
TBI.3
TBI.4
TBI.5
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
-
+ -
+
+
-
CN1A
(WH)
1
4
V
t°
t°
t°
IN8
IN9
IN11
IN12
OUTA1
THW6 THW7 THW8 THW9
Name
Indoor unit powered
by independent source
Power supply
To outdoor
unit
~/N 230V 50Hz
TB1
L
N
S1
S2
S3
TB1
1
CN01
3
(BK)
5
BN
1
CN3C
OG
(BU)
3
TBI.6
3
2
1
8
7
6
5
4
3
2
1
CN22
(BU)
2
1
t°
t°
t°
THWB1 THW10
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