Print

[wissel12]

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?

[slimjim]

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

[wissel12]

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

That would work, just looking for something cheaper.

[slimjim]

The ones I use are just over $100

[wissel12]

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

[wissel12]

Never mine that is backwards from what i need

[RSI]

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

[wissel12]

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

[atvalaska]

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.

[wissel12]

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

[atvalaska]

Never got to it yet

[wissel12]

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

[wissel12]

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

[slimjim]

Awesome, glad I could help!