BLUE | BLUE |
SUPPLY AIR | FLAME |
LIMIT SWITCH | SWITCH |
(ALL MODELS) | (ALL MODELS) |
BLUE | BLUE | ORANGE | ORANGE |
WHITE (NEUTRAL)
BLACK 120V
GROUND
ROOM THERMOSTAT
VENT
SAFETY
SWITCH
(ALL MODELS)
WHITE
GREEN
PRESSURE
SWITCH
BLACK
ON/OFF SWITCH
R
Y
G
W
AIR CONDITIONER
CONDENSING UNIT
C
Y
FLAME SENSOR
RED
BLOWER DECK SWITCH
TRANSFORMER |
|
WHITE W/ BLK STRIPES | WHITE |
24 V | 120 V |
BLK W/ WHITE STRIPES | BLACK |
180 120 90 60 | BLACK |
3 OR 4 SPEED MOTOR |
GAS
VALVE
Legend
Field Wiring
Factory Wiring:
Low Voltage
High Voltage
YELLOW
BROWN
IGNITOR
BLACK
BLACK
R | C | BLACK |
INDUCER
BLACK
|
| C |
|
|
|
|
|
|
| H |
|
|
|
|
| MH |
|
|
| L | ML |
|
|
|
|
|
|
| |
| WHITE | RED | ORANGE | BLUE | BLACK |
RED | 1 |
|
|
|
|
|
|
|
|
| |
ORANGE | 2 |
|
|
|
|
|
|
|
|
| |
BLUE | 3 |
|
|
|
|
|
|
|
|
| |
BLACK | 4 |
|
|
|
|
|
|
|
|
| |
| 5 |
|
|
|
|
WHITE | 6 |
|
|
|
|
|
|
|
|
|
| STATUS | |
FAULT CONDITION | RED | |
LIGHT | ||
| ||
Power On | ON | |
Limit Circuit Open or External Load On "W" | 1 FLASH | |
(Does not apply to Deck Switch, see below) |
| |
Pressure Switch Open with Inducer On | 2 FLASHES | |
Pressure Switch Closed with Inducer On | 3 FLASHES | |
Ignition Failure (Check Ground) | 4 FLASHES | |
115 VAC & Neutral Reversed or no Ground | 5 FLASHES | |
False Flame or Gas Valve Relay Shorted | Continuous | |
Power Off or Deck Limit Open | OFF | |
| FLAME | |
| ||
FAULT CONDITION | YELLOW | |
LIGHT | ||
Low Flame Sensor Signal | Continuous | |
| Flash | |
Flame Present | ON |
|
|
| MOTOR |
| |
If any of the original | PLUG |
| |||
|
| ||||
| with | Factory Wired | |||
the furnace must be | |||||
Heating Speeds | |||||
replaced, it must be | |||||
|
| ||||
replaced | wiring | Furnace | Wire | ||
material having a | Input, Btuh | Color | |||
| rating of |
|
| ||
| 60,000 | Red | |||
at least | ˚ C. |
| |||
Use copper | 80,000 | Blue | |||
|
| ||||
conductors |
|
| |||
only. |
|
|
|
| |
WD #710240B
Figure 30. Downflow Furnace Wiring Diagram
33
