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Old 09-29-2012, 09:13 AM   #1
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2nd AC Install

I recently bought a large bunkhouse FW and had a 2nd AC installed before I took delivery.

I did not have a lot of experience so when the service guy made the suggestion to install the front unit with controls at the unit rather than with a thermostat I said that would be fine.

Now that I have it home I don't like the fact that the fan runs full time and I would rather have a thermostat at the wall in the bedroom up front so it will behave more like the main, ducted unit.

Has anyone performed this conversion? Any opinions on the pros/cons of adding a second thermostat?

I think the parts are going to run me a few $100 so I am unhappy I was not more informed when I asked for the install.
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Old 09-29-2012, 10:52 AM   #2
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The problem with 2nd add on units, is that unless you have the t'stat wiring preinstalled, it is very difficult to get it installed. The RV is not built like a home with chase spaces in the wall and ceiling. I have seen some done with the t'stat wiring run across the ceiling and down the wall ....not really attractive.

It may also require a different ceiling adapter for the unit.

Ken
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Old 09-30-2012, 07:08 AM   #3
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I added a front a/c to my trailer and use the controls on the unit. The fan will turn on and off as the cooling cycle dictates and does not run all the time. Perhaps have yours checked.
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Old 09-30-2012, 08:00 AM   #4
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Quote:
Originally Posted by azdryheat View Post
I added a front a/c to my trailer and use the controls on the unit. The fan will turn on and off as the cooling cycle dictates and does not run all the time. Perhaps have yours checked.
There does not appear to be an "Auto" position for the fan. It has low, medium and high. I will re-check the operation but I am reasonable sure that was the way it works. I am going to head out and check right now.

Yep, after checking I have confirmed that is the way this model is designed to operate. I talked a Dometic dealer at PPL here in Houston the other day and I could get another ceiling adapter and thermostat. It was about $100 and change for an analog and closer to $200 for a digital thermostat, all in.

Randy, that is nice that yours works the way I prefer right out of the box.

Ken, I thought about running the wires for a thermostat and being new to RVing I was not sure if running wires inside internal walls was an option. I can certainly see how it might be more trouble in the exterior walls where the fiberglass and interior panels are bonded (in my case I think Cedar Creek bonds both sides to aluminum superstructure). I agree that surface mounted wiring is unattractive. My home theater is not ran in that fashion and if that is my only option on the front AC unit it will remain installed as is.

I was not sure if there is a way to run stuff inside interior walls. I see satellite dish antennas being installed and was wondering how folks are getting a triple LNB distributed to a BH room, living and bedroom.

Oh well, I used to have a sailboat in a previous life (before kids) and it was similar in that there are many systems packed into a small space. Looks like I will get it all figured out in due time.
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Old 09-30-2012, 03:43 PM   #5
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What brand do you both have? Because "mine works this way and yours doesn't" means you have different brands.

Your walls are probably full of styrofoam; good luck.

Satellite systems use roof run cables that then drop into a nearby cabinet and just hide the cables but don't go into walls. Too much trouble.
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