TYPICAL SYSTEM WIRING DIAGRAM
HOT
(LINE)
TH
INDUCER
HUMIDIFIER
ELECTRONIC
AIR CLEANER
FLAME
SENSOR
PROBE
LEGEND
Low Voltage (24 VAC)
Line Voltage (120 VAC)
N. C. = Normally closed switch
N. O. = Normally open switch
NEUTRAL
(LINE)
120 VAC
24 VAC CLASS II TRANSFORMER
24 VAC | TR |
| |
|
| ||
COOL |
|
| |
HEAT |
| CIRCU- | |
PARK |
| LATOR | |
PARK |
| BLOWER | |
LINE |
|
| |
XFMR |
|
| |
EAC |
|
| |
HUM |
|
| |
IND |
|
| |
IGN | IGNITOR |
| |
IND N |
| ||
IGN N |
|
| |
CIR N |
|
| |
LINE N |
|
| |
XFMR N |
|
| |
HUM N |
|
| |
EAC N |
|
| |
Y | Y |
| |
W | W | COMPRESSOR | |
|
| CONTACTOR | |
G | G |
| |
R | R |
| |
C | THERMOSTAT |
| |
|
| ||
E33 | PRESSURE SWITCH (N. O.) | ||
| |||
PS |
|
| |
HLI |
|
| |
HLO | HIGH LIMIT | AUX. HIGH | |
FP | |||
(N. C.) | LIMIT (N. C.) | ||
RO1 |
|
| |
GND |
| GAS | |
RO2 |
| ||
MV |
| VALVE | |
MV |
|
| |
TR |
|
| |
TH |
|
| |
4
