Installation Guide

Part number 550-100-066/0608
g a s -f i r e d w at e r b o i l e r — Boiler Manual
88
Troubleshooting (continued)
 Ultra wire harness details ( = factory jumper), continued
Pins Function Wire ID / Color Pin — In Pin — Out Wire ID / Color Pin — In Pin — Out
591-391-946 Control / Display
P9: Pin 1
RS485 A 1 / Brown 1 1 - Display RS485 A
P9: Pin 2
RS485 B 2 / Orange 2 2 - Display RS485 B
P9: Pin 3
Com 3 / Black 3 3 - Display Com
P9: Pin 4
24VAC-R 4 / Red 4 4 - Display 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:
Black jumper
P12: Pin 4
LWCO:
P13: Pin 1
Hard Limit (24 VAC)
Jumper Tyco/Phoenix
P13: Pin 2
Hard Limit
P13: Pin 3
Soft Limit
Jumper Tyco/Phoenix
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)
591-391-947 Receptacle With Saftey Cap
1 / Black 1 Receptacle Hot
2 / Green 2 Receptacle Ground
3 / White 3 Receptacle Neutral