32+ Amp Thermostat

[WX4SNO]

I bought two of these ProFusion forced air electric heaters from NT and can't seem to find any high-amp thermostats that will fit them:

https://www.northerntool.com/shop/tools/product_200631888_200631888

I know I'll need one thermostat for each, but because they draw up to 32 amps, I can't seem to locate a suitable line-voltage thermostat that can handle this. Does anyone know of such? Or better yet, is there a way to hook them up to a 24 volt relay for use with two smart thermostats? If so, what specific equipment would I need for that to work...i.e., parts list plz cause I

Thanks!

 

[wyliesdiesels]

You could use a 24v contactor like what is used on AC condensors.

If the heaters do not have internal overload protection then you should use a starter with appropriate sized overloads.

 

[mm08822]

I bought two of these ProFusion forced air electric heaters from NT and can't seem to find any high-amp thermostats that will fit them:

https://www.northerntool.com/shop/tools/product_200631888_200631888

I know I'll need one thermostat for each, but because they draw up to 32 amps, I can't seem to locate a suitable line-voltage thermostat that can handle this. Does anyone know of such? Or better yet, is there a way to hook them up to a 24 volt relay for use with two smart thermostats? If so, what specific equipment would I need for that to work...i.e., parts list plz cause I

Thanks!

You don't need high amperage tstats. The heater has an internal contactor that is driven by the tstat. The contactor sees all of the heating load.

Make sure your tstats are rated for 240vac. A 5 amp rating is more than enough to drive the coil.

 

[ard]

You don't need high amperage tstats. The heater has an internal contactor that is driven by the tstat. The contactor sees all of the heating load.

Make sure your tstats are rated for 240vac. A 5 amp rating is more than enough to drive the coil.

Agree. This is covered in the 'manual'...

If you can call it that....Interesting to see a publicly facing manual with edit redlines in it... bush league, IMO

 

[mm08822]

Agree. This is covered in the 'manual'...

If you can call it that....Interesting to see a publicly facing manual with edit redlines in it... bush league, IMO

I'll take the redlines any day instead of a non-marked up chinglish or jinglish manual.

 

[ToecuttersZ1R]

I bought two of these ProFusion forced air electric heaters from NT and can't seem to find any high-amp thermostats that will fit them:

https://www.northerntool.com/shop/tools/product_200631888_200631888

I know I'll need one thermostat for each, but because they draw up to 32 amps, I can't seem to locate a suitable line-voltage thermostat that can handle this. Does anyone know of such? Or better yet, is there a way to hook them up to a 24 volt relay for use with two smart thermostats? If so, what specific equipment would I need for that to work...i.e., parts list plz cause I

Thanks!

1- RIBU2C relay / https://www.functionaldevices.com/products/building-automation/details/RIBU2C/

1 - transformer 120 to 24 volt

You may be able to control both heaters with a smart tstat like the Ecobee, it's a 2 stage tstat.

 

[dogdog]

use an isolation relay and a 240V to 24Vac transformer.... then you can use those low voltage 24V Thermostats.
^^^^
Same as ToecuttersZ1R but get a 240 to 24Vac transformer instead, since your unit is a 240V. Unless you wanted to run a separate 120V line for a transformer.

Or you can try your wiring skills with this relay with a build in transformer for 240V to 24V...
It's simple and would work as well.


https://www.amazon.com/dp/B0037MXM1C/?tag=atomicindus08-20

https://customer.honeywell.com/resources/Techlit/TechLitDocuments/69-0000s/69-2562EF.pdf

 

[WX4SNO]

Thanks everyone! I noticed the contactor in the diagram but wasn't sure if I needed a high-amp t-stat because of the L2 line being connected to the terminal station and bearing full power or not...glad that I can get away with a lower amp thermostat!!

I had been looking at the Aube/Honeywell RC840T-240 earlier yesterday after posting my question...was hoping it would work! Here's a nice diagram of a 240v radiant heat setup using two of those transformers wired to a single Nest thermostat:

https://inspectapedia.com/heat/NEST-INTEG-MULTI-240V-WD-A.pdf

I'm assuming I could do that same for my two heaters but wire to the terminal station instead of to L1 and L2, which would bypass the internal t-stat on these heaters...does that sound about right those of you that are electricians?

 

[WX4SNO]

Well, I thought I saw a post from someone with the following connections with the RC840T-240:

Blue to L1
Black to L2 or T1 (same anyway)
Red to T2

I'll give that a try this summer once I get the garage built and the heaters installed...plan on mounting the Aube in each heater since there's room. I just wanted to see if this was possible with a wall-mounted t-stat so I can go ahead and run lines to a remote locations before drywall goes up
...try and plan things out since its too cold to be laying block for the foundation!

Thanks for the help!

 

[dogdog]

I delete the post cause the info is redundant, and you were asking for an electrician to comment

with that setup, it is for use with a regular low voltage(24Vac) thermostat, you can mount it anywhere you please just like your home thermostat. (well use logical common sense). but you do need to run the thermostat wires( minimum 18 awg) at least 3, I would double it just in case I wanted a separate thermostat for each heater. dunno why..

 

[WX4SNO]

Thanks dogdog! I wasn't sure of the poster as I read it, then refreshed the page and it was gone!

Now the question becomes will two of these heaters heat a 44x30x9.5 garage that has R-11 and R38 insulation or should I be considering adding some additional wall heaters like what cadet makes:
https://www.homedepot.com/p/Cadet-Com-Pak-Twin-4-000-Watt-240-Volt-Fan-Forced-In-Wall-Electric-Heater-in-White-CSTC402TW/100094225

Still debating on whether to do several of those from Cadet hooked up to a t-stat or go with the two from Northern Tool hooked to a t-stat. We don't have natural gas, propane is expensive, so its either wood heat (which I plan to do) or electric (backup heat, or when I'm just lazy lol). And with me only using the garage on weeknights an hour or two and on the weekends, I don't think radiant would be any good.

 

[dogdog]

I think some hvac guy that can do the calculation for you would be in a better position to answer your question, how much heat is enough.... I just use a small propane heater in my 22x20-ish and it is fine, but not warm enough to **** naked while working in warm. There are few garage build with people having radiant and likes it a lot.... you might want to check them out if you have that larger size garage.