NTI TRX085 - Page 57

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TRX Series II - Installation - Startup - Maintenance Instructions
Part 7 - Connecting Electrical Service
Connector
Description HT Selv
No. of Location Pin
CN1 POWER SUPPLY
1 120 VAC LIVE INPUT
HT (120V~) AC2 120 VAC NEUTRAL INPUT
3 PROTECTIVE EARTH
CN2
EXTERNAL PUMP 2 / Hi-V DIVERTER VALVE
(DHW)
1 120 VAC EXT. PUMP2 INPUT / 120VAC LINE DIV1
HT (120V~) AC
2 120 VAC NEUTRAL
3 120 VAC EXT. PUMP2 (NO) / 120VAC LINE DIV2
BOILER PUMP
4 120 VAC LIVE (NO)
5 120 VAC NEUTRAL
EXTERNAL PUMP 1
(CH)
6 120 VAC EXT. PUMP1 INPUT
7 120 VAC EXT. PUMP1 (NO)
CN3
FAN ON/OFF
1 120 VAC LIVE
HT (120~) AC
2 120 VAC NEUTRAL
IGNITER
3 120 VAC LIVE (NO)
4 120 VAC NEUTRAL
GAS VALVE
5 120 VRAC + (NO)
6 120 VRAC - (NO)
CN8 POWER SUPPLY OUT
1 120 VAC LINE
HT (120V~) AC
2 120 VAC NEUTRAL
CN4 PROTECTIVE EARTH 1
CN7 PROTECTIVE EARTH 1
CN9 PROTECTIVE EARTH 1
CN26
NTC HEAT RETURN
1 +5V
SELV (5V)
2 CH RETURN NTC SENSOR SIGNAL
NTC HEAT FLOW 1
3 +5V
4 CH FLOW 1 NTC SENSOR SIGNAL
5
NOT USED
6
NTC FLUE
7 +5V
8 FLUE NTC SENSOR SIGNAL
AIR PRESSURE SWITCH
9 +24V
SELV (24V)
10 APS DETECTION SIGNAL
11
NOT USED
12
CN20
DHW FLOW SWITCH
1 GROUND
SELV (5V)
2 DHW FLOW DETECTION SIGNAL
WATER PRESSURE SENSOR
3 +5V
4 GROUND
5 CH WATER PRESSURE SENSOR SIGNAL
6
NOT USED
7
DIVERTER VALVE
8 STEPPER DIVERTER VALVE COIL 1 START
9 STEPPER DIVERTER VALVE COIL 1 END
10 STEPPER DIVERTER VALVE COIL 2 START
11 STEPPER DIVERTER VALVE COIL 2 END
Table 20 - Boiler Wiring - 1