Mitsubishi Electric EHGT17D-YM9ED Service Manual page 12

Symbol Name
TB1 Terminal block (Power supply)
ECB1
Earth leakage circuit breaker for booster heater
Earth leakage circuit breaker for immersion heater
ECB2
(Option)
Water circulation pump 1
MP1
(Space heating & DHW)
Water circulation pump 2
MP2
(Space heating for Zone1)(Local supply)
Water circulation pump 3
MP3
(Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)
3WV 3-way valve
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
Thermostat (fixed temp.) for immersion heater
IHT
(Option)
IH Immersion heater (Option)
IHC Contactor for immersion heater (Option)
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5A Thermistor (DHW tank upper water temp.)
THW5B Thermistor (DHW tank lower water temp.)
THW6 Thermistor (Zone1 flow water temp.)(Option)
THW7 Thermistor (Zone1 return water temp.)(Option)
THW8
Thermistor (Zone2 flow water temp.)(Option)
THW9
Thermistor (Zone2 return water temp.)(Option)
THW10
Thermistor (Mixing tank water temp.)(Option)
THWB1
Thermistor (Boiler flow water temp.)(Option)
IN1
Room thermostat 1 input (Local supply)
IN2
Flow switch 1 input (Local supply)
IN3
Flow switch 2 input (Zone1)(Local supply)
IN4
Demand control input (Local supply)
IN5
Outdoor thermostat input (Local supply)
IN6 Room thermostat 2 input (Local supply)
IN7 Flow switch 3 input (Zone2)(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
OUTA1 Analog output
FTC FLOW TEMP. CONTROLLER
TBO.1-4 Terminal block (Outputs)
Terminal block (Signal inputs, Thermistor inputs,
TBI.1-6
Output)
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1-6 DIP switch *See Table 3
X1- 16 Relay
LED1 Power supply (FTC)
LED2 Power supply (Main remote controller)
LED3 Communication (FTC-C.B.)
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
Room thermostat
IN1 TBI.1 7-8 —
1 input *9
Flow switch 1
IN2 TBI.1 5-6 —
input
Flow switch 2
IN3 TBI.1 3-4 —
input (Zone1)
Demand control
IN4 TBI.1 1-2 —
input
Outdoor thermo-
IN5 TBI.2 7-8 —
stat input *10
Room thermostat
IN6 TBI.2 5-6 —
2 input *9
Flow switch 3
IN7 TBI.2 3-4 —
input (Zone2)
Electric energy
IN8 TBI.3 7-8 —
meter 1
Electric energy
IN9 TBI.3 5-6 —
meter 2
IN10 TBI.2 1-2 — Heat meter
Smart grid ready
IN11 TBI.3 3-4 —
IN12 TBI.3 1-2 — input
INA1 TBI.4 1-3 CN1A Flow sensor
*9. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more;
otherwise the compressor may be damaged.
*10.If using outdoor thermostat for controlling operation of heaters, the lifetime
of the heaters and related parts may be reduced.
*11.To turn on the boiler operation, use the main remote controller to select
"Boiler" in "External input setting" screen in the service menu.
OCH722A
Symbol Name
MC
Motor for Compressor
MBP
Brine Pump Motor
63H
High Pressure Switch
63L Flow Switch
63HS High Pressure Sensor
TH3
Thermistor (Liquid)
TH4
Thermistor (Discharge)
TH7 Thermistor (Outdoor)
TH8 Thermistor (Heat Sink)
TH32
Thermistor (Brine Inlet)
TH33
Thermistor (Comp. Surface)
TH34
Thermistor (Brine Outlet)
LEV-A Linear Expansion Valve
ACL1,ACL2,ACL3,ACL4 Reactor
CK
Capacitor
RS
Rush Current Protect Resistor
P.B. Power Circuit Board
N.F. Noise Filter Circuit Board
CONV.B. Converter Circuit Board
C.B. Controller Circuit Board
SW1 Switch (Function Switch)
SW4 Switch (Function Switch)
SW5 Switch (Function Switch)
SW6 Switch (Model Select, Function Switch)
SW7 Switch (Function Switch)
SW8 Switch (Function Switch)
SW9 Switch (Function Switch)
CNDM Connector (Connection for Option)
SV1/CH Connector
SV3/SS Connector
21S4 Connector
LED1,LED2 LED (Operation Inspection Indicators)
F3, F4 Fuse (T6.3AL250V)
X51,X52,X54 Relay
OFF (Open) ON (Short)
Refer to SW2-1 in
<Table 9.8.1 DIP Switch Functions>.
Refer to SW2-2 in
<Table 9.8.1 DIP Switch Functions>.
Refer to SW3-2 in
<Table 9.8.1 DIP Switch Functions>.
Heat source OFF/
Normal
Boiler operation *11
Standard opera- Heater operation/
tion Boiler operation *11
Refer to SW3-1 in
<Table 9.8.1 DIP Switch Functions>.
Refer to SW3-2 in
<Table 9.8.1 DIP Switch Functions>.
Refer to installation manual.
— —
Table 2 Outputs
Name Terminal block Connector Item
Water circulation pump 1 output
OUT1 TBO.1 1-2 CNP1
(Space heating & DHW)
Water circulation pump 2 output
OUT2 TBO.1 3-4 —
(Space heating for Zone1)
Water circulation pump 3 output
OUT3 TBO.1 5-6 —
(Space heating for Zone2) *12
2-way valve 2b output *13
OUT4 — CN851 3-way valve output
TBO.2 1-2
OUT5 — Mixing valve output *12
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 —
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 —
OUT13 TBO.4 3-4 — 2-way valve 2a output *13
Water circulation pump 4 output
OUT14 — CNP4
(DHW)
OUT15 TBO.4 1-2 — Comp. ON signal
OUT16 TBO.3 3-4 — Heaing thermo ON signal
OUTA1 TBI.4 7-8 — Analog output
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
*12. For 2-zone temperature control.
*13. For 2-zone valve ON/OFF control.
12
OFF ON
OFF ON
OFF ON
OFF ON
Heating DHW
Close
Stop
Open
OFF ON
OFF ON
— — —
OFF ON
OFF ON
Normal Error
— — —
OFF ON
OFF ON
OFF ON
OFF ON
— —