SECTION 9: WIRING
9.4 UHA(S) Series Ladder Wiring Diagram
120 VAC
CIRCULATION FAN | UH 300, 350, 400 Only |
CIRCULATION FAN
COMBUSTION BLOWER
TRANSFORMER
|
|
|
| GAS VALVE |
|
|
|
| PRESSURE SWITCH |
FLAME |
| 3 | 2 | 1 |
| 6 | 5 | 4 | |
SENSOR |
|
|
|
|
| FLAME | IGNITION | ||
|
| MODULE | ||
|
|
|
| LIMIT SWITCH LIMIT SWITCH (UH 300, 350, 400 ONLY) |
ELECTRODE | SPARK |
|
| MANUAL RESET LIMIT SWITCH |
|
|
|
| (UH 30 - 125 ONLY) |
|
|
|
| THERMOSTAT CONNECTION |
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.
17
