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Old 12-13-2014, 08:33 PM   #1
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Black - Honeywell Digital Thermostat

I wanted a black digital thermostat upgrade, but found the Coleman's a bit high.
The Honeywell RTH2300B is programmable, has a lighted LCD panel, and after price match was $22.41 each at WM.

A SPDT switch was used to provide high and low fan speeds.
These thermostats can be easily taken apart without tools for painting, and I used satin black Krylon Fusion which is made for plastic.
I wanted the switch mounted on the side, so some plastic had to be removed with a dremel cut off wheel to make room.

On the backing plate, the wire block was masked off to prevent paint from causing connection issues.
Red, White and Yellow wires from the RV are connected to R, W and Y terminals on the Thermostat.
The center terminal on the switch is connected to the G terminal, and the top and bottom terminals are connected to Green and Gray.
Just switch them if needed, so up on the switch is high fan speed on the A/C.
Blue is not used, this is not a 12V thermostat and must be powered by batteries.

Looking forward to the A/C's being better controlled this summer, and not needing to turn on a light to change the setting.
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Old 12-14-2014, 08:02 AM   #2
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Were did you hook your voltage read out at. I have one that I blew up already, I think it cost 5.00 bucks from China no wire diagram with it, had 4 wires I guess I pick the wrong wire and poof. by the way nice job on the stat.
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Old 12-14-2014, 08:50 AM   #3
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Thanks

I used this DC display with only two inputs, if you hook it up backwards it won't damage the unit.
It was off just a bit from my Fluke Meter, but there is an adjustment on the back so I just made them both match.

On our Rockwood there was a Red wire (12V +), and a Red with Blue Stripe that provided the ground.
Both were hooked up to the analog Coleman stat, providing power for operation.

After mounting the display in the wall I decided to add a switch, it only draws 14ma but its bright enough to be distracting at night.
I custom made the mount for the display and switch, using plastic from a spatula I found in the kitchen section at WM.
The switch is a SPST version of the one I used for fan speeds on the thermostats.
These micro switches are very delicate, you must pre-tin the wires and switch with a small iron very quickly then just touch the wire to the switch.
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