Fasco D-7909 Condenser Fan Wiring

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  #1  
Old 08-11-11, 01:17 PM
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Question Fasco D-7909 Condenser Fan Wiring

Condensing Unit is a Hile, HAC448GKA5

Replaced old motor - (Emerson K55HXHEB-8584) with 4 wires but only 3 were used.
Red
Black
Brown

New Motor - Fasco D-7909

Problem: The wire colors are:
Brown
Brown/wht
White
Black

The first thing I did was hook up Black and white wires. I had 2 browns so I only hooked up one to cap. Everything ran fine until the motor overheated and shut off in about 15 minutes.

The next step I routed both brown wires to "C" & "F" on the cap.
I then removed the red wire that had been connected to "C"
No change to the blue wire on "H".

The motor does not fail on high heat any longer but I can't keep a finger on the motor more than 2 seconds.

Is my wiring routed correctly?
 
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Old 08-11-11, 02:27 PM
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white and black to both sides of the contactor. Browns should go to each side of the new capacitor rated for your new motor.
 
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Old 08-11-11, 04:03 PM
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On terminals "C" & "F" the 2 brown wires are the only wires on those terminals - Right?
Also, is it normal for the motor to run that hot?
 
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Old 08-11-11, 04:18 PM
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You need a capacitor just for the fan motor. Should be be like a capacitor. 5mfd
 
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Old 08-11-11, 05:25 PM
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hvactechfw,
Sorry I'm not coming through clear with my question. I already have a new cap purchased separately from the motor. But the wiring configuration is my question. There was already a red wire on "C" terminal of the cap that went to "T1" of the contactor. Do I use that red wire or remove it?
If I discard the red wire, what I would have is the 2 browns on "C" & "F" and the blue on "H" that goes to the compressor. Is this right?
Also, I don't think the motor should be running so hot that I can't put a finger on it for more than 2 seconds!?
 
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Old 08-12-11, 04:49 PM
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IF you are using a Dual-run capacitor for both the compressor and fan motor it wires as follows:

Brown/white is capped off. If you got a new capacitor when you replaced the motor. Make sure that the capacitor is sized properly for the new motor.
 
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Old 08-14-11, 10:41 AM
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hvactechfw

Followed diagram, works good.
Motor is still running hot but I don't think it is an issue with wiring. I'm not going to be concerned with it unless it starts tripping on high heat.

Thanks for your help and good info
 
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