thermostat wiring

[chewie]

well crap here we go. i have taking on a small camper project in my off time and now im not sure on some issues. im trying to wire in a thermostate (robertshaw) series. (old) and not sure where the wires go? from the duotherm ac there is blue, orange, yellow, red. they connect to the wires going to the wall as follows.. blue/blue, orange/black, yellow/black, and red/red. so on the thermo end there is 6 wires. red and white (furnace) and red, white, black, blue on other. im not understanding where these hook-up or what letters they should hook up to ie. (rc) (y) (rh) etc. anybody got anything?

[ArmyEOD]

welcome to the site, I am sure someone can tell you what you are looking for but: just in case go to modmyrv.com and click on mods, good write up on changing the TS. Hope this helps you out.

George

[K-Star]

try googling wiring diagram for that brand thermostat.

["007"]

Welcome to irv2.
Here is a link to many wiring instructions for thermostats if you have the number of yours maybe able to match up for wiring.

[garym114]

Residential thermostats are 24v, RV thermostats are 12v. You can't run a normal thermostat in an RV because of the power.
You have to use a thermostat that has batteries, normally AA size, or a 12v RV thermostat. Most people are replacing the Dometic thermostats with the inexpensive Hunter thermostats that are digital and run on batteries. The Hunters have no way to control a two speed fan so you wire a little switch to the fan connector on the tstat and run the fan speed hi and low wires to the switch. When you wire up a battery powered thermostat in an RV you do not wire up the red wire from the wall, this the 12v power. Tape it over. If the old thermostat controlled the heater you can wire it up to the new one.
Yellow is the A/C
White is the heater
Black is ground
Depending, blue, green , orange are fan speed colors
How to do it --- Hunter Thermostat

[chewie]

i got it wired up and furnace works, but had to turn my attention to the converter which is non-existing!! so got my attention on this now. thanks for the support. im sure i will have ?s on this thing to.

[LadyFitz...]

Quote:

Originally Posted by garym114 ...The Hunters have no way to control a two speed fan so you wire a little switch to the fan connector on the tstat and run the fan speed hi and low wires to the switch...

It's not absolutely necessary to add the switch. One could always just wire the t-stat to either the high speed wire (usually the best choice to avoid evaporator icing) or the low speed wire and just run the selected speed only.