Trane Heat Pump connected to a Honeywell Smart Thermostat

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Old 12-29-14, 10:47 AM
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Trane Heat Pump connected to a Honeywell Smart Thermostat

I have a Trane Heat Pump, model 4WCY4060 and a Honeywell Smart WIFI thermostat.

The system seems to work proper, except when it gets real cold outside, below 40 degrees, it takes forever to warm up the house. The last couple of days, we have been in the 30's at night, and the system runs about an hour to raise the tempture one degree. I do receive a message, on the thermostat, that says auxiliary heat on, but when I place my hand in front of the heat register it does not feel very warm. My concerns are if I have connected the thermostat correctly or if there is a problem with the heat pumps auxiliary heat.

All the wire colors match the colors at the thermostat and the heat pump = HP.
I have the following wires connected.

Red wire to R with a jumper to RC, (24VAC for heating and cooling) Red at HP.
Green wire to G, (fan relay) Green at HP
Orange wire to O/B, (changeover valve) Orange at HP
Yellow wire to Y, (compressor) Yellow at HP
White wire to W, (heat relay) Connected to two white wires at the HP.
Blue wire to C, (-24vac common) Blue at HP.
Brown wire not being used.

The thermostat has the following connectors, C, K(not used), Rc, R, W-O/B, Y, G, W2-AUX/E, Y2(not being used), L(not being used).

Can anyone out there confirm?
Thanks
Mike.
 
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Old 12-29-14, 11:21 AM
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How are the wires connected at the air handler?
 
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Old 12-29-14, 07:35 PM
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A heatpump is a slow heating system. We recommend that setbacks not be used as the cost of the backup electric heat will be more expensive than leaving the temperature constant.

Do you know what size the backup electric heat strip is ? If it's a small strip you will not feel a lot of heat from the register. There should be a tag on the air handler.

You are the third person from Arizona today to mention the lack of heat from their heatpump system.
Are you experiencing colder than normal temps ? High winds ?
Did your system used to perform better ?
 
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Old 01-01-15, 04:45 AM
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Yes, it is colder than normal and I don't use the set back feature. I remade the connections at the thermostat and it is working now. My only question is where to connect the brown wire that is used for the defrost cycle. My only open positions on my thermostat are " K" which I was told by Honeywell is for future use and should not be used, "Y2" which is used if you don't have a heat pump, "L" which is the system monitor.
 
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Old 01-01-15, 03:29 PM
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The thermostat doesn't control defrost.

In your first post you said brown was unused. Where does it connect at the air handler or the heat pump ?

Maybe the brown wire is for an outdoor sensor ?
 
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Old 01-02-15, 01:43 PM
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The brown wire connects to a brown wire at the heat pump. This heat pump is call a "single package unit", meaning the heat pump and air handler are all in one unit. Stigmatics For the heat pump say the brown wire is for the defrost cycle. Right now, the brown wire is connected at the heat pump, but not at the thermostat. Like I said, it seems to be working correctly, so I am guessing the defrost cycle is wired internally. I just going to leave the brown wire off at the thermostat for now, unless someone knows where it should be connected.
 
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Old 01-02-15, 04:51 PM
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Some heat pumps use brown to energize the strip heat in defrost. Without seeing a wiring diagram, I wouldn't want to tell you how to wire it. I don't have access to Trane wiring diagrams. Can you post a copy?
 
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Old 01-04-15, 08:30 AM
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Wiring

Attached are the wiring diagrams. The white wire is connected to both white wires at the heat pump. The Brown wire, on the "T" location is the only wire not being used.
 
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Old 01-04-15, 04:06 PM
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Sorry, these old eyes can't read the wiring diagram. Maybe PJMax or one of the other guys will jump in.
 
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Old 01-04-15, 04:15 PM
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Mlibby.... I sent you a PM. You can send me the pics and I'll host and repost them. There isn't enough detail when posted here at DIY.
 
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Old 01-04-15, 04:23 PM
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http://www.americancoolingandheating...ifications.pdf

Seems like I remember other posters from your neck of the woods that did not have electric heat strips in their heat pumps or they only had 5 kw strips.

Post a pic of your electric heat strips so that we can see the size and any possible damaged wiring.
 
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Old 01-04-15, 04:30 PM
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It looks like brown is T which is an outside temperature sensor and not used on your new t'stat.



(thanks for the diagrams Carlos)
 
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