Outdoor Wood Furnace Info

All-Purpose OWF Discussions => Electronics => Topic started by: wissel12 on December 04, 2014, 07:40:50 AM

Title: Unit heater
Post by: wissel12 on December 04, 2014, 07:40:50 AM

I installed a unit heater in my garage. My house has three zones of hot water heat.  I was not using my basement zone. So I hook into that zone for the unit heater in my garage.

My problem is that the T stat in the garage tells the pump to circulate and to open the zone.  So that leaves the motor on the unit heater. I bought a snap disc, thinking that would do the trick strap to the cooper line.  It will not close it unless I take a torch to the snap disc. 

Is there any simple relays I can use to operator the fan?

Title: Re: Unit heater
Post by: slimjim on December 04, 2014, 07:50:36 AM

A Honeywell strap on Aqua Stat is the simplest way I know of to control the fan motor!

Title: Re: Unit heater
Post by: wissel12 on December 04, 2014, 07:57:12 AM

So when the copper line heats ups, it will tell the fan to run.

That would work, just looking for something cheaper.

Title: Re: Unit heater
Post by: slimjim on December 04, 2014, 07:59:07 AM

The ones I use are just over $100

Title: Re: Unit heater
Post by: wissel12 on December 04, 2014, 08:00:36 AM

How about this: Grundfos 595656 1/2-Inch Clip-On Aquastat Control. Just found it on amazon.

Title: Re: Unit heater
Post by: wissel12 on December 04, 2014, 08:05:18 AM

Never mine that is backwards from what i need

Title: Re: Unit heater
Post by: RSI on December 04, 2014, 11:10:02 PM

Just run the power to the unit heater off the same source as the pump. Then they will come on together.

Title: Re: Unit heater
Post by: wissel12 on December 05, 2014, 09:20:28 AM

I can not do that, because when a different zone would energize the fan would run.

Title: Re: Unit heater
Post by: atvalaska on December 05, 2014, 10:06:04 AM

my snap dick work the same ...they want 100% contact ...I just got one with a "lower come on temp"...i'll see this weekend.

Title: Re: Unit heater
Post by: wissel12 on December 08, 2014, 05:15:23 AM

The lowest I could find was 110 turn on temp.  Where did you mount yours?

Title: Re: Unit heater
Post by: atvalaska on December 18, 2014, 02:26:22 PM

Never got to it yet :(

Title: Re: Unit heater
Post by: wissel12 on December 22, 2014, 05:18:12 AM

I talk to a hvac person and they said to use a 24 volt relay off the thermostat.

Title: Re: Unit heater
Post by: wissel12 on February 14, 2015, 09:15:28 AM

Well slim, I ended up putting a aquastat on the unit heater. Set it @ 120. Working good.  Thanks

Title: Re: Unit heater
Post by: slimjim on February 14, 2015, 10:35:42 AM

Awesome, glad I could help!