Weil-McLain Ultra Manual page 88

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gas fired water boiler
Troubleshooting
Figure 96
Ultra wire harness details (
Pins Function
P9: Pin 1
RS485 A
P9: Pin 2
RS485 B
P9: Pin 3
Com
P9: Pin 4
24VAC-R
P10: Pin 1 ODT Sensor: (+)
P10: Pin 2 ODT Sensor: (-)
P11: Pin 1 DHW Thermistor 1+
P11: Pin 2 DHW Thermistors Common
P11: Pin 3 DHW Thermistor 2+
P11: Pin 4 Call For Heat Priority 1
P11: Pin 5 Call For Heat Priority 1 (24 VAC)
P12: Pin 1 LWCO: 24 VAC -R
P12: Pin 2 LWCO: Common
P12: Pin 3 LWCO:
P12: Pin 4 LWCO:
P13: Pin 1 Hard Limit (24 VAC)
P13: Pin 2 Hard Limit
P13: Pin 3 Soft Limit
P13: Pin 4 Soft Limit
P14: Pin 1 System Supply Water Temp (+)
P14: Pin 2 Return & supply common (2 wire)
P14: Pin 3 System Return Water Temp (+)
P15: Pin 1 Call For Heat Priority 2
P15: Pin 2 Call For Heat Priority 2 (24VAC R)
P15: Pin 3 Call For Heat Priority 3 (24VAC R)
P15: Pin 4 Call For Heat Priority 3
P15: Pin 5 Modulating Input (common)
P15: Pin 6 Modulating Input
P16: Pin 1 0-10V Multiple Boiler
P16: Pin 2 0-10V (COM)
P16: Pin 3 Unused
P16: Pin 4 Alarm (dry contacts )
P16: Pin 5 Alarm
P16: Pin 6 Multiple Boiler Output (contact)
P16: Pin 7 Multiple Boiler Output (contact)
88
— Boiler Manual
(continued)
= factory jumper), continued
Wire ID / Color Pin — In Pin — Out
591-391-946 Control / Display
1 / Brown 1 1 - Display RS485 A
2 / Orange 2 2 - Display RS485 B
3 / Black 3 3 - Display Com
4 / Red 4 4 - Display 24VAC-R
Black jumper
Jumper Tyco/Phoenix
Jumper Tyco/Phoenix
591-391-947 Receptacle With Saftey Cap
1 / Black 1 Receptacle Hot
2 / Green 2 Receptacle Ground
3 / White 3 Receptacle Neutral
Wire ID / Color Pin — In
Part number 550-100-066/0608
Pin — Out