Replacing 7-wire York Thermostat w/ Honeywell RTH6360D

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Old 11-06-18, 03:25 PM
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Replacing 7-wire York Thermostat w/ Honeywell RTH6360D

I'm currently working under the impression that the replacement Honeywell thermostat I've purchased is suitable for controlling my heat pump, however after initially installing the new thermostat I'm not able to get any heat produced. Cooling works fine and the blower/fan turns on without issue for all modes, but heat and EM heat are a no go right now. I would add also that EM heat seems to push cold air and Heat just runs the fan/blower without hot or cold air.

My current wiring is as follows:

Old unit:
R - Red
B - Blue
G - Green
Y - Yellow
X - Black
O - Orange
W - White

There is a brown wire left unused in the wall.

New Unit:
R - Red
C - Blue
G - Green
Y - Yellow
W2 (Aux) - Black
O/B - Orange
White is left unused (per my understanding of the manual)
Brown continues to be left unused

Thermostat mode Setup:
200 - 2 (heat pump)
205 - 7 (air to air heat pump)
218 - 0 (reversing valve energize in Cool)
220 - 1 (single cool / compressor stage)
221 - 1 and 1 (single heat stage, single backup heat stage)
300 - 0 (manual system change over)
425 - 1 (smart response enabled)

Pictures of before/after below. Also worth noting the honeywell website states this particular thermostat "doesn't support EM heat", but when I cycle through the modes it does offer Heat, Cool, and EM Heat. The manual also discusses EM heat is equivalent to Auxilary heat so maybe I am misunderstanding something. Any help here would be greatly appreciated.

Thanks, Steve

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Last edited by PJmax; 08-19-19 at 09:21 PM. Reason: reoriented/resized pictures
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Old 11-06-18, 05:06 PM
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Welcome to the forums.

White goes on W and black goes on E. Programming looks ok.

These two wires control the electric heat.
Even if they were disconnected.... the heat pump should still be producing heat.
 
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Old 11-06-18, 09:15 PM
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Thank you and thanks for the quick reply!

I am going to adjust those wires in the morning and also find one of my digital thermometer's to ensure the heat really isn't working. The weather just turned cooler (I'm in MA) and my condo appears to be well insulated and I'm on an upper floor so I haven't needed to run the heat since I inspected and purchased the property. I'll report back tomorrow.
 
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Old 11-07-18, 06:22 PM
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Looks like heat is working just fine after letting the unit run for a little bit and my EM heat works now too. Thanks again and I hope this post and the photos can help someone else in the future!
 
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Old 08-19-19, 07:12 PM
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Hello again...reviving this thread for another inquiry.

I found at the beginning of the summer when running black to E and white to W that when the thermostat is set to Cool it blows hot air (it smells like the air handler electric coils are on). So for the last 8 weeks or so I've run the thermostat with the black on E and the white removed again and this seems to allow the Cool setting to produce cool air again.

Any thoughts as to why white on W would cause the air handler to turn the coils on when thermostat is set to Cool? Note I can get to the air handler in crawl space, but the condenser is on the roof and requires a 20' ladder to a skylight in a common area of my building to access...
 
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Old 08-19-19, 09:28 PM
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Welcome back.

Neither W or E should be active in cool mode.
While I check into this problem...... leave the black and white disconnected.
What brand is the air handler and condenser ?
 
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Old 08-20-19, 04:50 PM
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I’ve attached a screen shot of the York air handler in my crawl space. Thank you for any insight you can provide.

edit: the screenshot is crystal clear on my phone, but in case it’s not visible on this post the model and serial numbers are..

model#: N2AHD06A06A

serial#: MBPS082959
 
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