For Upflow and Downflow Residential Furnaces
BLUE | BLUE | BLUE | BLUE |
FLAME | BLOWER | SUPPLY AIR |
| FLAME | |
DECK SWITCH | LIMIT SWITCH |
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(SELECT | (SELECT | (ALL MODELS) |
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MODELS ONLY) | MODELS ONLY) |
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| BLUE | BLUE | ORANGE | ORANGE |
| WHITE (NEUTRAL) |
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| BLACK 120V |
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| GROUND |
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| ROOM THERMOSTAT |
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VENT
SAFETY SWITCH
(SELECT
MODELS ONLY)
WHITE
GREEN
PRESSURE | VENT |
SWITCH | PRESSURE SWITCH |
| (93+ MODELS ONLY) |
BLACK
BLOWER DOOR
SWITCH
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| Y |
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| G |
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| W |
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| AIR CONDITIONER |
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| CONDENSING UNIT |
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| C |
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| FLAME SENSOR |
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| RED |
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| YELLOW |
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| BROWN |
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| GAS |
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| VALVE |
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| IGNITOR |
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| Legend |
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| BLACK |
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| BLACK |
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| Field Wiring |
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| R | C BLACK |
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| Factory Wiring: |
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| INDUCER |
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| Low Voltage |
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| BLACK |
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| High Voltage |
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| STATUS |
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| FAULT CONDITION |
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| RED |
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| LIGHT |
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| Power On |
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| ON |
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| Limit Circuit Open or External Load On "W" |
| 1 FLASH |
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| Pressure Switch is Open with Inducer On |
| 2 FLASHES |
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| Pressure Switch is Closed with Inducer Off |
| 3 FLASHES |
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| Ignition Failure (Check Ground) |
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| 4 FLASHES |
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| 115 VAC & Neutral Reversed or no Ground |
| 5 FLASHES |
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| False Flame or Gas Valve Relay Shorted |
| Continuous |
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| Power Off |
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| OFF |
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| FLAME |
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| FAULT CONDITION |
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| YELLOW |
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| LIGHT |
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| Low Flame Sensor Signal |
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| Continuous |
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| Flash |
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| Flame Present |
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| ON |
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TRANSFORMER |
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WHITE W/ BLK STRIPES | WHITE | VENT SAFETY SWITCH |
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| (SELECT MODELS ONLY) |
24 V | 120 V |
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BLK W/ WHITE STRIPES | BLACK |
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180 120 90 60 | BLACK | Refer to the Installation |
Instructions provided | ||
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| with the furnace for the |
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| cooling speeds for your |
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| application. |
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| 3 OR 4 SPEED MOTOR |
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| C |
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| H |
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| MH |
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| L | ML |
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| WHITE | RED | ORANGE | BLUE | BLACK |
RED | 1 |
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ORANGE | 2 |
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BLUE | 3 |
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BLACK | 4 |
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WHITE | 6 |
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| MOTOR |
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| PLUG |
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These wires are
not present
on all models
If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105 C.
WD# 710355-0
Figure 29. Upflow and Downflow Wiring Diagram
36