Mitsubishi Electric EHSC-MEC Service Manual page 26

6-13. EHSC-TM9C.UK
Power supply
to Booster heater
3~ 230V 50Hz
L1 L2 L3
(1) (3) (5)
ECB1
2 4 6
1 3 5
A1
BHCP
2 4 6 A2
BHC1
BHC2
1 3 5 A1 1 3 5 A1
2 4 6 A2 2 4 6 A2
2 2 2
BH1 BH2
BHF BHT
2
1
2
3
1
2
3
1
2
3
5
2
7
1. Symbols used in wiring diagram are,
: 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.
Table 1 Signal Inputs
Name Terminal block Connector
IN1 TBI.1 13-14 — Room thermostat 1 input
IN2 TBI.1 11-12 — Flow switch 1 input
IN3 TBI.1 9-10 — Flow switch 2 input (Zone1)
IN4 TBI.1 7-8 — Demand control input
IN5 TBI.1 5-6 — Outdoor thermostat input *1
IN6 TBI.1 3-4 — Room thermostat 2 input
IN7 TBI.1 1-2 — Flow switch 3 input (Zone2)
IN8 TBI.3 1-2 — Electric energy meter 1
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 remote controller to select "Boiler" in "External input setting" screen in
the service menu.
Table 2 Outputs
Name Terminal block Connector
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW)
OUT2 TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1)
Water circulation pump 3 output (Space heating/cooling for Zone2) *1
OUT3 TBO.1 5-6 —
2-way valve 2b output *2
OUT4 TBO.2 4-6 CNV1 3-way valve (2-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 5-6 — Cooling signal output
OUT9 TBO.4 3-4 CNIH Immersion heater output
OUT10 TBO.3 1-2 — Boiler output
OUT11 TBO.3 3-4 — Error output
OUT12 TBO.3 5-6 — Defrost output
OUT13 TBO.4 1-2 — 2-way valve 2a output *2
OUT14 — CNP4 Water circulation pump 4 output (DHW)
OUT15 TBO.3 7-8 — Comp. ON signal
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
OCH571D
CNPWM
(WHT)
1
3
3
CNP1
(WHT) TBO.1
1 X1
M 1
1~
2
MP1 3
M
X2
3
1~
M
2WV2b
1~
4
MP2 X3
5
M
6
1~
MP3
X14
1
M
1~
3
MP4
CNP4
(RED)
TBO.2 X5A
Close
1
M N
Open
1~ 2
X5B
3
MXV
X4
1
4
*1
5
5
6
CNV1
(WHT)
TBO.3
X10
1
Signal output
(Boiler)
2
X11
3
Signal output
(Error)
4
X12
Signal output 5
(Defrost)
6
X15
7
Signal output
(Comp ON)
8
TBO.4
X13
1
CNIH
M
(ORN)
CNBHT
2
X9
(BLK) 2WV2a
3
1
4
CNBC 3
X8
(GRY) 5
Signal output
(Cooling)
6
CNBH
(WHT)
1
3
CNBHT
(BLK)
CNBC
(GRY)
1
3
X6
1
3
X7
5
7
CNBH
(WHT)
: connector,
Item OFF (Open)
Refer to SW2-1 in <6-16. DIP switch functions>.
Refer to SW2-2 in <6-16. DIP switch functions>.
Refer to SW3-2 in <6-16. DIP switch functions>.
Normal Heat source OFF/ Boiler operation *2
Standard operation Heater operation/ Boiler operation *2
Refer to SW3-1 in <6-16. DIP switch functions>.
Refer to SW3-3 in <6-16. DIP switch functions>.
Refer to installation manual.
Item
1
<How to use TBO.1 to 4>
2
Connect them using either way as shown below.
4
F1
6
Tool
CN01
F2
(WHT)
Conductor
Outline view Top view
1 TBO.1
2
3 1 CNP1
4 3 (WHT)
5
6 F2
6.3A 250V
1
TBO.2 1 CNP4
1
3 (RED)
2
3 SW5
4
5 8
LED1
6 1
1
CNV1
1 TBO.3
SW4
(WHT)
5
2
6
3
1
4
5
SW3
6
LED2
7
8 8
1
1 TBO.4
LED3
2
SW2
3
4
8
5
1
1
6 CNIH
3 (ORN)
SW1
1 1
CNBC CNBHT
8
(GRY)
(BLK)
3 3
1
LED4
CNBH
(WHT)
7
CN1A CNW5 CNW12
(WHT) (WHT) (RED)
1 1
1
2
4 4
2 4 6 8 10 12 14 2 4 6 8 10 12 14 2 4 6
1 3 5 7 9 11 13 1 3 5 7 9 11 13 1 3 5
TBI.2
TBI.1 TBI.3
TBI.1
1 2 3 4 5 6 7 8 9
1 2 1 4 1 3 1 2
t ° t ° t ° t ° t °
Symbol
TB1
ECB1
MP1
MP2
MP3
MP4
ON (Short)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a
2WV2b
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
OFF ON
THWB1
OFF ON
THWB2
OFF ON
IN1
IN2
OFF ON
IN3
IN4
Heating DHW
IN5
Close
IN6
Stop
IN7
Open
IN8
OFF ON
IN9
OFF ON
IN10
OFF ON
FLOW TEMP. CONTROLLER (FTC5)
OFF ON
TBO.1−4 Terminal block <Outputs>
TBI.1−3 Terminal block <Signal Inputs, Thermistor>
OFF ON
F1
Normal Error
F2
Normal Defrost
SW1−5 DIP switch *See <6-16. DIP switch functions>.
OFF ON
X1−15
OFF ON LED1
LED2
OFF ON
LED3
LED4
CNPWM Pump speed control signal for MP1
CN108
26
Indoor unit powered
Indoor unit powered
via outdoor unit by independent source
To outdoor
Power supply
unit ~/N 230V 50Hz
Tool
L N S1 S2 S3 TB1 L N
Conductor
BLK
1
BLK
BLK
2
CN01 BLK
(WHT) 4
1
6
1
CN01 2
2
CN01
(WHT)
4 (WHT) 4
F1 6
6
10A 250V
1
CN3C
BRN
(BLU)
1 1
3 CN3C CN3C
ORN
(BLU) (BLU)
3 3
1
CNPWM
(WHT)
3
CNRF Wireless receiver
(WHT) (Option)
CN105 WiFi adapter
(RED) (Option)
CNIT
(BLU)
1
CN22
(BLU) 2
CN108
CN21 CN20
(YLW) (RED) *1
1
1
3WV 2WV1
2
3
4 5 6 4 5 6
TBO.2 TBO.2
8 10 12
M
M
7 9 11 13
1~ 1~
3WV 2WV1
TBI.3
10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3
+ + +
– – –
CN22
(BLU)
1 2
t
°
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump 1(Space heating/cooling & DHW)
Water circulation pump 2
(Space heating/cooling for Zone1)(Local supply)
Water circulation pump 3
(Space heating/cooling for Zone2)(Local supply)
Water circulation pump 4 (DHW)(Local supply)
2-way valve (For Zone1)(Local supply)
2-way valve (For Zone2)(Local supply)
Mixing valve (Local supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Local supply)
Flow switch 1 (Local supply)
Flow switch 2 (Local supply)
Demand control (Local supply)
Outdoor thermostat (Local supply)
Room thermostat 2 (Local supply)
Flow switch 3 (Local supply)
Electric energy meter 1 (Local supply)
Electric energy meter 2 (Local supply)
Heat meter (Local supply)
Fuse (T10AL250V)
Fuse (T6.3AL250V)
Relay
Power supply (FTC5)
Power supply (Main remote controller)
Communication (FTC5-Outdoor unit)
Reading or writing data to SD card
SD card connector
To outdoor
unit
S1 S2 S3 TB1
BRN
ORN
4 5 6 7 8 9 10 11 12 13 14
t t t t t
° ° ° ° °