Filter
Top Products
SECTION 9: WIRING
17
9.4 UHA(S) Series Ladder Wiring Diagram
FLAME
SENSOR
PRESSURE SWITCH
THERMOSTAT CONNECTION
6
3
4
5
2
1
120 VAC
TRANSFORMER
COMBUSTION BLOWER
CIRCULATION FAN
CIRCULATION FAN
UH 300, 350, 400 Only
GAS
VALVE
ELECTRODE
IGNITION
MODULE
FLAME
SPARK
LIMIT SWITCH
LIMIT SWITCH (UH 300, 350, 400 ONLY)
MANUAL RESET LIMIT SWITCH
(UH 30 - 125 ONLY)
NOTE:
For field wiring into service junction box, or if any of the original wire supplied with the heater
must be replaced, it must be replaced with wiring material having a temperature rating of at least 105°C
and 600 volts. For supply connections use No. 14 AWG or larger wires.