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how to wire a 5000w 240 ceiling heater

GarageBud101

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Feb 4, 2019
Messages
10
Location
calgary
So i purchased a new ceiling heater, link below, and need some help wiring it, I will include the wiring diagram below as well. In the manual it explains a 2 wire mode, where L1 is connected to one hot wire and L/2 AND F wire are connected to the other hot wire but with this mode the "Fan mode" is not available, but there is no F wire. The only wires are the L/1,L/2 and two 24v wires(red and black).

Now to use all the wiring, Im assuming the two 24v wires need to be connected to an external 24vac transformer that i will have to purchase, then connected to a 24vac thermostat?

Do i need to connect the two 24v wires to a transformer? Id rather just connect the two hot wires coming from the 30amp breaker, then to the 240v thermostat, which is then connected to the heating unit, and of course a ground wire. But is this safe? Is the 24vac transformer necessary?

heater:
https://www.stelpro.com/en-CA/dragon-ceiling-fan-heater

Thermostat:
https://www.princessauto.com/en/detail/240v-28a-line-voltage-wall-thermostat/A-p8678310e


View attachment DR-142.pdf
 
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justinjoyal

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Apr 30, 2015
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Your unit most likely has a built-in transfomer so what you need to do is use a 24v thermostat to switch the unit on with those 2 wires coming out of it.

Stelpro has different wiring options for this unit, so it depends om which one you got. Do you have the exact model number ?
 
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GarageBud101

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Feb 4, 2019
Messages
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Location
calgary
Its the DRR0521CW and it does not have a built in transformer, cant i just hook up the two hot wires to a thermostat and call it a day? Isnt that how most heaters work?
 
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GarageBud101

Member
Joined
Feb 4, 2019
Messages
10
Location
calgary
Your unit most likely has a built-in transfomer so what you need to do is use a 24v thermostat to switch the unit on with those 2 wires coming out of it.

Stelpro has different wiring options for this unit, so it depends om which one you got. Do you have the exact model number ?

How can i tell if my unit has a built in transformer? Amd what's the difference between a 24v thermostat and the one i have (in link provided)? Or can i use the one i have?
 
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justinjoyal

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Apr 30, 2015
Messages
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Your unit has a 240v contactor.

If the contactor has a 24v coil then a simple battery powered 24v thermostat will do. Do you have the installation manual ?
 
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GarageBud101

Member
Joined
Feb 4, 2019
Messages
10
Location
calgary
Your unit has a 240v contactor.

If the contactor has a 24v coil then a simple battery powered 24v thermostat will do. Do you have the installation manual ?

I do have the manual and it only describes the two wire method where fan mode will not be available, i even tried contacting customer support and they pretty much told me to get a licensed electrician.
 
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