| TYPICAL SYSTEM WIRING DIAGRAM |
HOT | NEUTRAL |
(LINE) | (LINE) |
| 120 VAC |
|
| 24 VAC CLASS II |
| ||
|
| TRANSFORMER |
| ||
TH | 24 VAC | TR |
|
| |
| 50A55 |
|
|
| |
| COOL |
|
|
| |
| HEAT |
|
| CIRCULATOR | |
| PARK |
|
| ||
|
|
| BLOWER | ||
| PARK |
|
| ||
|
|
|
| ||
| LINE |
|
|
| |
| XFMR |
|
|
| |
| EAC | INDUCER |
|
| |
| HUM |
|
| ||
|
|
|
| ||
| IND |
|
|
| |
| IGN | IGNITOR |
|
| |
HUMIDIFIER | IGN N |
|
|
| |
IND N |
|
|
| ||
| CIR N |
|
|
| |
| LINE N |
|
|
| |
| XFMR N |
|
|
| |
ELECTRONIC | HUM N |
|
|
| |
EAC N |
|
|
| ||
AIR CLEANER |
|
|
| ||
|
|
|
| ||
| Y | Y |
|
| |
| W | W | COMPRESSOR | ||
|
|
| CONTACTOR | ||
| G | G |
|
| |
| R | R |
|
| |
| C | THERMOSTAT |
|
| |
|
|
|
| ||
|
| PRESSURE SWITCH (N. O.) | |||
| PS |
|
|
| |
| HLI |
|
|
| |
FLAME | HLO | HIGH LIMIT | AUX. HIGH | ||
SENSOR | FP | ||||
(N. C.) | LIMIT (N. C.) | ||||
PROBE | RO1 | ||||
THERMAL |
|
| |||
| GND |
|
| ||
| RO2 | ROLLOUT (N. C.) | GAS | ||
| MV |
|
| VALVE | |
| MV |
|
|
| |
| TR |
|
|
| |
| TH |
|
|
| |
LEGEND |
|
|
|
| |
Low Voltage (24 VAC) |
|
|
|
| |
Line Voltage (120 VAC) |
|
|
|
| |
N. C. = Normally closed switch |
|
|
|
| |
N. O. = Normally open switch |
|
|
|
| |
4
