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Author Topic: Problem Wiring Thermostat  (Read 3914 times)

mipayne

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Problem Wiring Thermostat
« on: February 02, 2012, 09:59:28 PM »
My HVAC friend had me wire my wood boiler as shown in the photo below. I added lines to show clarity and aid someone in explaining to me what is the fix. As soon as I turn on the heat on the wood boiler thermostat the fuse in my air handler burns out. I ensured the heatpump thermostat was switched to the off position.  I have a goodman heatpump and air handler. When the temp drops, I need the blower in my air handler to switch on, but not the compressor. Also, I need 24 VAC sent to the wood boiler, to close a circuit, tuning on the circulation pump. I have searched around for many hours trying to find the solution, and today I gave up and went to my friends house and he drew out what I was to do. Well, that did not work, or I misunderstood.

Thank you ahead of time for your help.


<table style="width:auto;"><tr><td><img src="https://lh5.googleusercontent.com/-lvdH_CiMeOM/Tytj358-WqI/AAAAAAAABE0/KqmceHLC23k/s144/Thermostat%2520Wiring.jpg" height="96" width="144" /></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="<February22012 | mikeysp>">February 2, 2012[/url]</td></tr>
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RSI

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Re: Problem Wiring Thermostat
« Reply #1 on: February 02, 2012, 10:22:41 PM »
Are the lines where all the wires are jumpered between? If so I would pull it all off and start over.

First thing to do after taking all the wires off is take the wire off the G on the heat pump thermostat and see if the heat pump will still operate ok. Some of them require the G wire but not usually. If the heatpump won't work with the G wire off then you will need a relay. If it goes then run that wire that came off the G to the W on the OWB thermostat. Then run a jumper wire between the RH on both thermostats. Also run a jumper between the C on both.

The relay should be able to be wired to the W on the OWB thermostat and the C connection.
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Bull

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Re: Problem Wiring Thermostat
« Reply #2 on: February 03, 2012, 07:08:55 AM »
Welcome to the site mipayne
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Southern Indiana
Just outside of the "Small Town"

muffin

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Re: Problem Wiring Thermostat
« Reply #3 on: February 03, 2012, 07:59:15 AM »
Not sure what you plans are for the heat pump.  I too have heat pumps.  what I did was simply intercept the 'Y' wire which is the compressor.  I wired it to a 3-way light switch.  In one position it simply return the 'Y' to the heatpump so it will operate as usual.  In the other position it runs it to my 3-way zone valve for the boiler (with 'C' as the ground)
.  Works great.  With the flip of the switch I can change back and forth between the two systems.

This summer I want to upgrade the switch to be automatic by sensing the hot water from the boiler.  This way if all fails, it will still revert to the electric coils too.
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