Need Rec On 22 Amp Programable Thermostat - HVAC - DIY Chatroom Home Improvement Forum

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Old 09-30-2010, 01:27 PM   #1
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Need rec on 22 amp programable thermostat

I have 5 1000 watt ceramic panel heaters in a sun room, and would like to replace the current thermostat with a programmable model. 5000 watts / 240v = 21 amps. (As a side note, it appears as if the contractor who installed the system used an undersized thermostat because the wires at the connection show signs of overheating.) There are 2 10g wires that supply the power in conduit, and there is a box that houses the current thermostat.

I'm having difficulty finding a line-load thermostat that can handle this much current -- most that I have found tops out at 3800 watts/16 amps.

Any suggestions?

One potential alternative I'm considering is to replace the line-load stat with a 240v DPST relay and a conventional 24v programmable stat. If you think this would be a better alternative, I need recommendations for the combo relay/transformer. Thanks.


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Old 09-30-2010, 02:09 PM   #2
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I instantly thought about putting a couple relays on a transformer. How about something like this?


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Old 09-30-2010, 02:47 PM   #3
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At 21 amps. 10 gauge wire is fine.

Probable another problem some where if the wires are over heating.
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