Wiring Diagram - Mitsubishi Electric EHPT20Q-VM2EA Service Manual

6

WIRING DIAGRAM

6-1-1 Cylinder unit WIRING DIAGRAM <EHPT20Q-VM2EA>
Power supply
to Booster heater
~/N 230V 50Hz
L N
(1) (3)
ECB
2 4
BHC2
1 5 A1
2 6 A2
BHC1
1 5
A1
2 6 A2
BH1
BHF BHT
1
2 CNBHT
4
(BLK)
1
2 CNBC
3
(GRY)
1
2 CNBH
3
(WHT)
TBI.1
1 2 3 4 5 6 7 8 9 10 11 12
1
Symbol Name
TB1 Terminal block <Power supply>
TB2 Terminal block <Outdoor unit>
ECB Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1
(Thermal store & space heating)
MPA Water circulation pump A (Hot water supply)
3WV 3-way valve
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BHC1 Contactor for booster heater
BHC2 Contactor for booster heater protection
OUT Thermostat for outdoor unit
OUC Contactor for outdoor unit
Table 1 Signal Inputs
Name Terminal block Connector Item
IN1 TBI.1 3-4 — Room thermostat 1 input
IN6 TBI.1 1-2 — Room thermostat 2 input
IN8 TBI.1 5-6 — Electric energy meter 1
IN9 TBI.1 7-8 — Electric energy meter 2
IN10 TBI.1 9-10 — Heat meter
Table 2 Outputs
Name Terminal block Item
Connector
OUT1 CNP1 Water circulation pump1 output (Space heating & DHW)
ー
OUT3 TBO.1 1-2 — 2-way valve 2b output *1
OUT4 CNV1 3-way valve output
ー
OUT6 CNBH 1-3 Booster heater output
ー
OUT13 TBO.1 3-4 — 2-way valve 2a output *1
OUTA ー CNPA Water circulation pump A output
OUTB ー — Relay for outdoor unit
Do not connect to the terminals that are indicated as "ー" in the "Terminal block" field.
*1. For 2-zone valve ON/OFF control.
GCH15010
CNPWM
F1
(WHT)
1
3
3
CNP1
(WHT)
1 X1
M
1~
3
MP1
TBO.1
X3
1
M
1~
2
2WV2b
CNPWM3
(RED)
1
CNPA
3 (RED)
XA
1
M
1~
3
MPA
1 X4
M
1~
5
3WV
CNV1
(WHT)
TBO.1
X13
3
M
1~ 4
2WV2a
CNOUT
(WHT)
2
4
CNOUC
(BLU)
1
3
CNBHT
CNBHT
(BLK)
(BLK)
1
4
CNOUT
CNBC
(WHT)
(GRY)
1
CNOUC
3
(BLU)
X6
1
3
5
7
CNBH
(WHT)
13 14
CN22
(BLU)
2 1 5 1 5 1
t ° t ° t ° t ° t °
Symbol Name
TH1 Thermistor (Room temp.)(Option)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW3 Thermistor (Flow water (to tank) temp.)
THW4 Thermistor (DHW supply temp.)
THW5A Thermistor (Stored water (upper) temp.)
THW5B Thermistor (Stored water (lower) temp.)
IN1 Room thermostat 1 (Local supply)
IN6 Room thermostat 2 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
OFF (Open) ON (Short)
Refer to SW2-1 in<Table 3 DIP Switch Functions>.
Refer to SW3-1 in<Table 3 DIP Switch Functions>.
Refer to installation manual.
<How to use TBO.1>
Connect them using either way as shown below.
1
2
4
6
CN01
F2
(WHT)
1 CNP1
(WHT)
3
CNPA
1
(RED)
3
1 TBO.1
2
3
4
SW4
SW3
1
CNV1
(WHT)
5
SW2
1
SW1
4
1
CNBH
2
(WHT)
4
7
1
1 CNBC
(GRY)
3
3
2 4 6 8 10 12 14
1 3 5 7 9 11 13
XBL XBN
TBI.1
1.Symbols used in wiring diagram are,
:connector,
5 1 2
2.Indoor unit and outdoor unit connecting
wires have polarities, make sure to match
terminal numbers (S1, S2, S3) for correct
wirings,
t°
t °
3.Since the outdoor unit side electric wiring
may change, be sure to check the outdoor
unit electric wiring diagram for service.
INDOOR CONTROLLER (FTC)
TBO.1 Terminal block <Outputs>
TBI.1 Terminal block <Signal Inputs>
F1 Fuse (T10AL250V)
F2 Fuse (T6.3AL250V)
SW1-4 DIP switch *See Table 3
X1-13 Relay
XBL Relay for outdoor unit
XBN Relay for outdoor unit
LED1 Power supply
LED2 Power supply (Main controller)
LED3 Communication (Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
Pump speed control signal for MPA
CNPWM3
CN108 SD card connector
Flow sensor 1 For space heating
Flow sensor A Potable side
Flow sensor B Primary side
OFF ON
OFF ON
OFF ON
Heating DHW
OFF ON
OFF ON
OFF ON
OFF ON
8
Tool
Tool
Conductor
Conductor
Outline view Top view
F1
F2
10A 250V
6.3A 250V
1
CN01
2
(WHT)
4
6
CN3C
1
(YLW)
2
TAB1
LED1
1
1
CN1A
(WHT)
6
4
1
CNPWM
1
(WHT)
3
CNPWM3
1
8
(RED)
3
1
LED2
LED3
1
CNRF
8
(WHT)
1 5
1
CN105
(RED)
5
8
1
CNIT
(BLU)
5
LED4 CN108
CN2A
CN22
(BLU)
1
(BLU) 1 1
1
1 1
2
1
CN20
2 5 5
4 4
5
(RED)
CN2B CNW3 CNW12 CNW5
(YLW) (BLU) (RED) (WHT)
: terminal block.
WHT
WHT
1
CN01 2
WHT
(WHT)
4
BLK
6
XBL
XBN
CN3C 1
(YLW) 2
CNOUT 2
(WHT)
4
CNOUC 1
(BLU) 3
Wireless receiver
(Option)
WiFi adapter
(Option)
SD memory
card
Power supply
To outdoor unit
~/N 230V 50Hz
CIRCUIT
BREAKER
L N
TB1 TB2 S1 S2 S3
BLK
BLK
WHT
WHT
1 5 A1
OUC
2 6 A2
2
OUT
WHT
WHT
1
CN1A
Flow sensor 1
(WHT)
4
1
CN2A
Flow sensor A
(BLU)
4
1
CN2B
Flow sensor B
(YLW)
4