Ehsc-Tm9B - Mitsubishi Electric EHSC-VM2B Service Manual

6-4. EHSC-TM9B

Power supply
to Booster heater
3~ 230V 50Hz
L1 L2 L3
(1) (3) (5)
ECB1
2 4 6
1 3 5
A1
BHCP
A2
2 4 6
BHC1
1 3 5 1 3 5 BHC2
A1 A1
2 4 6 A2 2 4 6 A2
*
M
1~
MXV
2 2 2
BH1 BH2
BHF BHT
2
2
2
2
2
* 1
3WV 2WV1
TBO.1 TBO.1
9 10 11 9 10 11
M M
1~ 1~
3WV 2WV1
Table 1 Signal Inputs
Name Terminal block Connector
IN1 TBI.1 1-2 — Room thermostat 1 input
IN2 TBI.1 3-4 CN2F Flow switch 1 input
IN3 TBI.1 5-6 — Flow switch 2 input (Zone1)
IN4 TBI.1 7-8 — Demand control input
IN5 TBI.1 9-10 — Outdoor thermostat input *1
IN6 TBI.1 11-12 — Room thermostat 2 input
IN7 TBI.1 13-14 — Flow switch 3 input (Zone2)
*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
OUT1 TBO.1 3-4 CNP1 Water circulation pump 1 output (Space heating & DHW)
OUT2 TBO.1 5-6 — Water circulation pump 2 output (Space heating for Zone1)
OUT3 TBO.1 7-8 — Water circulation pump 3 output (Space heating for Zone2)
OUT4 TBO.1 9-11 CNV1 3-way valve (2-way valve1) output
TBO.1 12-13
OUT5 — Mixing valve output
TBO.1 13-14
OUT6 — CNBH 1-3 Booster heater 1 output
OUT7 — CNBH 5-7 Booster heater 2 output
OUT8 TBO.2 11-12 — Booster heater 2+ output
OUT9 TBO.2 9-10 CNIH Immersion heater output
OUT10 TBO.1 1-2 — Boiler output
OUT11 TBO.2 1-2 — Error output
OUT12 TBO.2 3-4 — Defrost output
OUT13 TBO.2 7-8 — 2-way valve 2 output
Symbol Name
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump1(Space heating & DHW)
MP2 Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3 Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1) 3-way valve (2-way valve1)(Field supply)
2WV2 2-way valve2 (Field supply)
MXV Mixing valve (Field 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
OCH532A
F1
Signal
output
(Boiler)
F2
CNPWM
(WHT)
1
3
TBO.1
X10
3
1
CNP1
2
(WHT)
1 X1
3
M
1~
4
3
MP1
X2
1
5
M
1~ 3
6
MP2
X3
7 5
M
8
7
1~
X4
9
MP3
9
10
11
1
11
X5A
13
12
13
Close
14
1
N
X5B
Open
3
TBO.2
5
X11
Signal
1
7
output
2
(Error)
9
X12
Signal
3
11
output
4
(Defrost)
13
5
M
6
1~
X13
2WV2 7
8
Signal
1 X9
9
output
3 1
(Immersion
10
heater) X8
CNIH 11
(ORN)
Signal
12
output
7
13
(Booster
heater2+)
14
1
3
3 CNBHT(BLK)
CN2F
(YLW)
CNBH
1
(WHT)
X6
1 3
3
X7
2 4
5
1 3
7
1
3
CNBC
(GRY)
1 2 1 3 1
t t t
° ° °
Item OFF (Open)
Refer to SW2-1 in <6-11 Dip switch setting>
Refer to SW2-2 in <6-11 Dip switch setting>
Refer to SW3-2 in <6-11 Dip switch setting>
Normal Heat source OFF/Boiler operation *2
Standard operation Heater operation/Boiler operation *2
Refer to SW3-1 in <6-11 Dip switch setting>
Refer to SW3-3 in <6-11 Dip switch setting>
Item
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 flow temp.)(Option)
THW7 Thermistor (Zone1 return temp.)(Option)
THW8 Thermistor (Zone2 flow temp.)(Option)
THW9 Thermistor (Zone2 return temp.)(Option)
THWB1 Thermistor (Boiler flow temp.)(Option)
THWB2 Thermistor (Boiler return temp.)(Option)
IN1 Room thermostat 1 (Field supply)
IN2 Flow switch 1
IN3 Flow switch 2 (Field supply)
IN4 Demand control (Field supply)
IN5 Outdoor thermostat (Field supply)
IN6 Room thermostat 2 (Field supply)
IN7 Flow switch 3 (Field supply)
CN01
(BLK)
5
3
1
CNP1(WHT)
1 3
TBO.1
2
1
4
CNV1
(WHT)
6
5
8
FTC4
10
12
14
TBO.2
2
LED3
4
6
8
10
1
12 CNPWM
(WHT)
3
14
LED4
LED2
CNBH
CNIH
(WHT)
(ORN)
3 1
CN22
CNBC
CNBHT 1
(BLU)
(GRY)
(BLK) 2
1
3 1
SW4
CN20 CN21 CNW12 CNW5
LED1
(RED) (YLW) (RED) (WHT)
1
6
1 1
SW2
1 1
2 3 2
4
1
6 8 10 12 2 4 6 8 10 12 14
SW3
5 7 9 11 13 1 3 5 7 9
TBI.1 TBI.2
1
TBI.1
1 2 3 4 5 6 7 8 9 10 11 12 13
CN2F
(YLW)
4 1 2 1 3
t t
° °
ON (Short)
OFF ON
OFF ON
OFF ON
OFF ON
Heating DHW
Stop Close
Stop Open
OFF ON
OFF ON
OFF ON
OFF ON
OFF ON
Normal Error
Normal Defrost
DHW Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X13 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
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 servicing.
4. This diagram shows the wiring of indoor unit and outdoor unit connecting wires
(specification of 230V), adopting superimposed system of power and signal.
When work to supply power separately to indoor unit and outdoor unit was applied, refer
to Figure 1.
16
Cylinder unit powered
via outdoor unit
To outdoor
unit
L N S1 S2 S3 TB1
BLK
CN01
(BLK)
CN01
5
(BLK) 5
3
3
1
1
CN3C
(BLU)
BRN
1
1
CN3C
ORN
(BLU)
3 3
CN105
(RED)
CNRF
(WHT)
CN108
SW1
8 1 8
8
TBI.2
14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN22
(BLU)
1 2
t ° t ° t ° t ° t ° t °
Cylinder unit powered
by independent source.
To outdoor
Power supply
~/N 230V 50Hz unit
L N S1 S2 S3 TB1
BLK
CN01
(BLK)
5
3
1
CN3C
(BLU)
BRN
1
ORN
3
Figure 1