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Author Topic: Single zone - line voltage or 24v?  (Read 4228 times)

Jon_E

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Single zone - line voltage or 24v?
« on: December 29, 2017, 01:50:47 PM »

OK this is probably a really dumb question but I am learning so bear with me.  I have a single heating zone in my garage.  One Grundfos circulator pump.   Really simple, but I cannot find a good answer to this - do I need a single zone controller and a low-voltage thermostat (like I have in my house) or can I use a line-voltage thermostat and skip the controller?  If so, what should I be looking for?  Every line-voltage thermostat I can find says that it's for electric heat.  I just want to leave the thing set at 55° and have the pump kick on if the temperature in the garage gets below that setpoint.   
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mlappin

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Re: Single zone - line voltage or 24v?
« Reply #1 on: December 29, 2017, 02:37:29 PM »

I use three of those in the shop, as long as your pump doesn’t draw more than the thermostat is rated for it’s fine. I’m actually starting a 1/3 horse motor with a thermostat thats for baseboards, most pumps are a 1/6hp or less.
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RSI

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Re: Single zone - line voltage or 24v?
« Reply #2 on: December 29, 2017, 03:28:49 PM »

You can't use a thermostat that is labeled for electric heat only.
If you have a Menards store in your area, they stock the LUX100 thermostat. Just plugs in the wall and has an outlet on the front of it.

If you want to put the thermostat on the opposite side of the building, it is usually better to use a switching relay or fan center relay and a low voltage thermostat.
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E Yoder

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Re: Single zone - line voltage or 24v?
« Reply #3 on: December 29, 2017, 04:00:35 PM »

You can't use a thermostat that is labeled for electric heat only.
If you have a Menards store in your area, they stock the LUX100 thermostat. Just plugs in the wall and has an outlet on the front of it.

If you want to put the thermostat on the opposite side of the building, it is usually better to use a switching relay or fan center relay and a low voltage thermostat.
Why not? I have, it has a big swing but it'll kick on and off.. I'm not following you perhaps.
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RSI

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Re: Single zone - line voltage or 24v?
« Reply #4 on: December 29, 2017, 05:57:53 PM »

We may not be talking about the same thermostats. If it is just a mechanical one with knob, it might be ok. If it is an electronic scr type it will ruin a motor eventually if it works at all.
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E Yoder

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Re: Single zone - line voltage or 24v?
« Reply #5 on: December 30, 2017, 05:32:53 AM »

OK, yeah, I'm talking about an old mechanical dial type that's just a switch. You are correct. :)
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mlappin

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Re: Single zone - line voltage or 24v?
« Reply #6 on: December 30, 2017, 07:26:00 AM »

OK, yeah, I'm talking about an old mechanical dial type that's just a switch. You are correct. :)

Thats what I was referring to as well.
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Jon_E

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Re: Single zone - line voltage or 24v?
« Reply #8 on: December 30, 2017, 04:21:30 PM »

I've used that exact one to run 110v. blowers and pumps.
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mlappin

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Re: Single zone - line voltage or 24v?
« Reply #9 on: December 30, 2017, 09:56:38 PM »

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wreckit87

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Re: Single zone - line voltage or 24v?
« Reply #10 on: December 31, 2017, 09:04:16 AM »

I use one of that same Honeywell for my radiant to light up the pump, and another just like it on my unit heater. Temp swing is a little broad, but works very well for the garage. I've also sold a lot of them to customers for the same purpose. They work very well in the garage
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Jon_E

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Re: Single zone - line voltage or 24v?
« Reply #11 on: December 31, 2017, 04:25:09 PM »

Nice!  Thanks all you guys for the helpful feedback, I have one on order and will be getting it in a few days.  I am working on my zone plumbing manifold and hope to have it completed and ready to install in a week or two.  It's too cold out there even to install heat!  Waiting for some daytime temps in the 20's or better so I can actually function outside. 
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