Thermostat - Page 2 - Fiberglass RV


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Old 10-18-2007, 07:19 PM   #15
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Name: Brian
Trailer: Boler (B1700RGH) 1979
Alberta
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It's not digital, but according to Honeywell, the T87K is not a simple pair of contacts on a bimetallic spring, like mine:
Quote:
Power Method - Uses stored power from heating controls.
Sensor Element - Thermistor
and most importantly:
Quote:
Voltage - 20 to 30 Vac
Also, there are at least two versions of the T87, but
Quote:
The T87K heat only works with 2 or 3 wire heat only systems
Unfortunately, it expects one of those wires to be from a 24 VAC transformer.

This is a vastly more complex thing than my simple thermostatic switch, which might be fine if it were powered by its own battery... but apparently it's not.
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Old 10-18-2007, 07:57 PM   #16
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Trailer: TM14 Surfside
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Quote:
It's not digital, but according to Honeywell, the T87K is not a simple pair of contacts on a bimetallic spring, like mine:

and most importantly:

Also, there are at least two versions of the T87, but

Unfortunately, it expects one of those wires to be from a 24 VAC transformer.

This is a vastly more complex thing than my simple thermostatic switch, which might be fine if it were powered by its own battery... but apparently it's not.
Yeah ... I just put in a Walmart special ... it works great ... so much for trying to be fancy eh?

Thanks for the advice all ...
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Old 02-14-2010, 03:34 PM   #17
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Name: Wilder
Trailer: 1993 Scamp 13 ft
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Good suggestions on the Hunter digital thermstat. I was having trouble with the furnace in our 13' Scamp, and just replaced the thermostat with this one from Amazon:

Hunter 42999B Just Right Digital Thermostat

It wired right up per the included instructions for a 2-wire installation and works great! Ahh, heat again )
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