New stat for a York Heat Pump

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  #1  
Old 11-26-13, 10:58 AM
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New stat for a York Heat Pump

I am trying to replace a old Honeywell T874G thermostat on a older York B1Sp042A06 Heat Pump unit. The low voltage wires on the old stat ate G,W,X,B,O,and Y
I am try to hook up a programmable Climatemaster stat (ATP32U03)
The connections on the new one are, C, R, W1, O, Y1, Y2, AND G
Any help would be greatly appreciated!!
 
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  #2  
Old 11-27-13, 04:39 PM
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Post the Q674 number on the subbase.

Post all terminals on the old subbase as well to help locate your diagram.

Were all the terminals that you posted in use?
 
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Old 11-27-13, 04:58 PM
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Name:  stat.old.wiring.jpg
Views: 1842
Size:  37.3 KBthank you, in advance, for your help!!
yes, all the terminals stated are used.
the # is: Q674- J1027
 
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Old 11-27-13, 05:52 PM
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Looks like B is common.
 
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Old 11-27-13, 06:04 PM
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http://www.villagesatbelvoir.com/wp-...e6dfb53182.pdf




Old = New
G = G
W = W1
X = tape off
B = C
Y = Y1
 
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Old 11-27-13, 06:15 PM
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You may have an outdoor t-stat which keeps part of the aux heat kit off above a certain outdoor temp.

On your system, X may activate a relay to bring on the entire set of heat strips in emergency heat mode.

You can tape X off for now, but emergency heat may not operate at full capacity.
 
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Old 11-27-13, 07:47 PM
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Every ODT that I have seen wires to the indoor unit. Disconnecting E at the stat shouldn't affect this.
 
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Old 11-28-13, 10:17 AM
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so I do not need to connect O,R or X to the new stat

thank you so much for all your help with this.
 
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Old 11-28-13, 10:27 AM
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Connect the old R to the new R.
Connect the old O to the new O.

The question is X. If you have 20 KW with 10 KW controlled by W and 10 KW controlled by X you will see a large jump in your light bill by connecting both W and X to the new W.

I would only connect the old W to the new W.
If you find that you are still cold, you can always add the old X to the new W later.
 
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Old 11-28-13, 02:48 PM
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Thank you so much for all your help, the stat is working perfectly!!
 
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Old 11-30-13, 03:35 PM
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Every ODT that I have seen wires to the indoor unit. Disconnecting E at the stat shouldn't affect this.
E may be connected to a relay to bypass the outdoor t-stat and bring on the entire heat kit regardless of outdoor temp in emergency heat mode.

I agree that it shouldn't affect normal heatpump operation.
 
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Old 11-30-13, 04:26 PM
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Interesting. Post a diagram with your wiring so that we can view it.
 
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Old 12-16-13, 11:57 AM
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I noticed that the condenser on the outside of the heatpump is frosting up, is this normal for this time of year? when it is very cool outside?
 
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Old 12-16-13, 06:37 PM
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Yes, this is normal. The heat pump has a defrost cycle to address this.
 
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