Weil-McLain Ultra Manual page 87

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gas fired water boiler
Troubleshooting
Figure 96
Ultra wire harness details (
Pins Function
P1: Pin 1
Power (120VAC): Hot
P1: Pin 2
Power (120VAC): Neutral
P1: Pin 3
Power (120VAC): Earth Ground
P2: Pin 1
Circulator 1 Hot
P2: Pin 2
Circulator 2 Hot
P2: Pin 3
Circulator 3 Hot
P2: Pin 4
Circulator 1 Neutral
P2: Pin 5
Circulator 2 Neutral
P2: Pin 6
Circulator 3 Neutral
P2: Pin 7
Circulator 1 Ground
P2: Pin 8
Circulator 2 Ground
P2: Pin 9
Circulator 3 Ground
P3: Pin 1
Transformer: 120VAC Hot
P3: Pin 2
—
P3: Pin 3
Transformer: 120VAC Neutral
P3: Pin 4
—
P3: Pin 5
—
P3: Pin 6
Transformer: 24VAC Common
P3: Pin 7
Transformer: 24VAC Hot
P4: Pin 1
Blower Power: Hot
P4: Pin 2
Blower Power: Neutral
P4: Pin 3
Blower Power: Ground
P5: Pin 1
Blower: V+
P5: Pin 2
Blower: RPM
P5: Pin 3
Blower: PWM
P5: Pin 4
Blower: V-
P6: Pin 1
Gas Valve: (+)
P6: Pin 2
Gas Valve: (-)
P7: Pin 1
Hx Inlet (+) 1
P7: Pin 2
Hx Inlet Com
P7: Pin 3
Hx Inlet (+) 2
P7: Pin 4
Pres Switch
P7: Pin 5
Pres Switch
P8: Pin 1
Flue (+) 1
P8: Pin 2
Flue Com
P8: Pin 3
Flue (+) 2
P8: Pin 4
Hx Outlet 1 (+)
P8: Pin 5
Hx Outlet Common
P8: Pin 6
Hx Outlet 2 (+)
P8: Pin 7
Hx Safety 1 (+)
P8: Pin 8
Hx Safety Common
P8: Pin 9
Hx Safety 2 (+)
Part number 550-100-066/0608
— Boiler Manual
(continued)
= factory jumper)
Wire ID / Color Pin — In Pin — Out
Upper High Voltage Harness
Wire ID / Color Pin - In Pin - Out
2 to 1 to 7 / Black 1 4 - Male Flange Connector
3 to 6 / White 2 5 - Male Flange Connector
4 to 5 / Green 3 6 - Male Flange Connector
/ Black 1 Transformer 120VAC Hot
/ White 3 Transformer 120VAC Neutral
/ Blue 6 Transformer 24VAC Common
/ Yellow 7 Transformer 24VAC Hot
8 / Black 1 3 - Male Flange Connector
9 / White 2 2 - Male Flange Connector
10 / Green 3 1 - Male Flange Connector
Upper Low Voltage Harness
Wire ID / Color Pin - In Pin - Out
12 / White 1 13 - Male Flange Connector
13 / Red 2 12 - Male Flange Connector
14 / Black 3 11 - Male Flange Connector
15 / Blue 4 10 - Male Flange Connector
10 / Blue 1 15 - Male Flange Connector
11 / Blue 2 14 - Male Flange Connector
7 / Red 1 2 - Male Flange Connector
8 / Red 2 1 - Male Flange Connector
9 / Red 3 9 - Male Flange Connector
4 5 - Wire Jumped
Red
5 4 - Wire Jumped
1 / Yellow 1 8 - Male Flange Connector
2 / Yellow 2 7 - Male Flange Connector
3 / Yellow 3 6 - Male Flange Connector
4 / Red 4 5 - Male Flange Connector
5 / Red 5 4 - Male Flange Connector
6 / Red 6 3 - Male Flange Connector
Wire ID / Color Pin — In
Lower High Voltage Harness
Wire ID / Color Pin - In
3 / Black 4 - Female Flange Connector
2 / White 5 - Female Flange Connector
1 / Green 6 - Female Flange Connector
Not part of harness — directly terminated to transformer
4 / Black 3 - Female Flange Connector
5 / White 2 - Female Flange Connector
6 / Green 1 - Female Flange Connector
Lower Low Voltage Harness
Wire ID / Color Pin - In
12 / White 13 - Female Flange Connector
13 / Red 12 - Female Flange Connector
14 / Black 11 - Female Flange Connector
15 / Blue 10 - Female Flange Connector
10 / Blue 15 - Female Flange Connector
11 / Blue 14 - Female Flange Connector
7 / Red 2 - Female Flange Connector
9 / Red 1 - Female Flange Connector
8 / Red 9 - Female Flange Connector
1 / Yellow 8 - Female Flange Connector
3 / Yellow 7 - Female Flange Connector
2 / Yellow 6 - Female Flange Connector
4 / Red 5 - Female Flange Connector
6 / Red 4 - Female Flange Connector
5 / Red 3 - Female Flange Connector
Pin — Out
Pin - Out
1 - Receptacle Hot
2 - Receptacle Neutral
3 - Receptacle Ground
2 - Blower Hot
1 - Blower Neutral
3 - Blower Ground
Pin - Out
1 - Blower V+
2 - Hall Sensor Out
4 - PWM Input
5 - Blower V-
1 - Gas Valve
5 - Gas Valve
1 - Hx Inlet (+)
3 & 4 - Hx Inlet Com
2 - Hx Inlet (+)
1 - Flue (+)
3 & 4 - Flue Com
2 - Flue (+)
1 - Outlet (+)
3 & 4 - Hx Outlet Com
2 - Outlet (+)
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