SET UP SWITCHES |
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LOW HEAT ONLY | TWINNING AND/OR | ACRDJ - AIR CONDITIONING | |
AND BLOWER | COMPONENT TEST | ||
RELAY DISABLE JUMPER | |||
TERMINAL | |||
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LED OPERATION
& DIAGNOSTIC LIGHT
BLOWER SPEED TERMINALS
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| OFF | ON |
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| LHT | 1 |
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| Y |
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| DLY |
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| DHUM |
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24V | COM | TEST / TWIN |
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| W/W1 |
| HUM | PLT |
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| Y/Y2 |
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| R |
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| FUSE |
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| PL1 |
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| COM | 24VAC |
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| COM | 24V |
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| HI HT | MTR |
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| COOL |
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| LO HT | TAPS |
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SPARE 2 SPARE 1 |
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| IDR |
| HSIR |
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| L2 |
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| IDM | |||
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| L1 |
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| PL2 | HSI | HI | LO |
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HUMIDIFIER TERMINAL (24 VAC 0.5 AMPS MAX)
TRANSFORMER
24 VAC CONNECTIONS
MAIN HARNESS CONNECTOR
58MEC
115 VAC LINE (L1) |
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| PL2 - HOT SURFACE | |
115 VAC | ||||
CONNECTION | ||||
IGNITER/INDUCER | ||||
BLOWER POWER (BL1) | ||||
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| MOTOR CONNECTION | |||
| CONNECTION | |||
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A08344
Fig. 17 - Two-Stage Control
5.Insert funnel in tube and pour up to 1 quart of antifreeze, propylene glycol (RV, swimming pool antifreeze, or equi- valent) into funnel until it is visible at point where condens- ate enters open drain. (See Fig. 20.)
6.Reconnect drain cap to inducer housing.
7.Replace main furnace door.
8.Propylene glycol need not be removed before restarting fur- nace.
WIRING DIAGRAM
See Fig. 22 for Wiring Diagram.
TROUBLESHOOTING
Use the Troubleshooting Guide, the status code LED on the control and the Component Test to isolate furnace operation problems.
Step 1 — Status Codes
For an explanation of status codes, refer to service label located on back of main furnace door or Fig. 21. The stored status codes will NOT be erased from the control memory, if
NOTE: Removing the blower access door will open the blower access door switch and terminate
NOTE: NO thermostat signals may be present at control and all blower off delays must be completed to view previous codes.
To retrieve previous codes, remove one of the red main limit or flame rollout switch wires 1 to 4 sec until the LED light goes out, the reconnect it. (Do not leave red wire disconnected for longer periods of time as the control will assume an overtemperature condition exists and will respond with blower operation.) This places the control in the status recall mode and displays the first code stored in memory.
A07911
Fig. 18 - Winterizing the Furnace
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