Roberts Gorden UHD[X][S][R] 150 - Manual (Page 25)

SECTION 9: W IRING
19
9.4 Ladder Wiring Diagram
IMPORTANT:
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
(221 °F) and 600 V. For supply connections, use No. 14 AWG or larger wires.
FLAME
SENSOR
PRESSURE SWITCH
THERMOSTAT CONNECTION
6
3
4 5
2 1
120 VAC
TRANSFORMER
FLUE BLOWER
GAS VALVE
ELECTRODE
IGNITION
MODULE FLAME
SPARK
LIMIT SWITCH LIMIT SWITCH (UHD 300, 350, 400 ONLY)
MANUAL RESET LIMIT SWITCH
(UHD 75 - 125 ONLY)
FLUE BLOWER