Question about QMark LFK304 Fan Forced Wall Heater - Perfect for Offices

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Qmark 5813-2027-000 Dpdt Thermostat Schematic

My son took apart our forced wall heater and took the thermostat off the wiring plugs, but he can't remember which wire goes where and there is no schematic diagram on the inside of the wall heater to show how to wire it back. From the power source there is a red and black wire (with two posts for that on the thermostat), and from the fan unit itself there are three posts (two black wires and one red)

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3 Suggested Answers

appman67
  • 32 Answers

SOURCE: Problem wiring 240amp baseboard heaters

12 gauge wire sounds under sized for the application. And 20 amp 240 v breakers might be sufficient if you where wiring the heaters separately. But be sure that your wiring is not romex - because romex is an insulator and is not permitted in conduit. I would suggest that you up size your wire to 10 guage and your breaker to 30 amp as well. Then double check your heater wiring connections to insure that they're wired the same throughout.

Posted on May 03, 2009

panilling9
  • 284 Answers

SOURCE: I am trying to replace a electric baseboard heater

if you have a electric meter check the voltage coming out of the wall to be sure it is 220 v???? (meter across black and white)then with your meter only test black wire to ground and white wire to ground seperately you should have 110 from each wire to ground?
If you have only 110 to the black and no reading on the white, you either have a bad breaker or a 110v circuit
If you read 220v and you new heater is rated for 220v black to black and red to white wall thermostat or built in as long as you have 220v to your connection from the wall or your wall thermostat when turned higher than room temp.
Bare grounds tie together and mount to your green ground screw

Posted on Sep 25, 2009

  • 4736 Answers

SOURCE: where can i buy a thermostat for my heater fhu5-4b

Northern Tool sells ceiling mount Fahrenheat Heaters Try them, they may have it as an accessory or optional item.

Posted on Feb 10, 2011

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