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07-20-2020, 11:38 AM
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#1
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Senior Member
Join Date: Aug 2019
Location: Dayton, Ohio
Posts: 357
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Install an AC Unit
How hard is it to install an ac unit from scratch? Our 38' Montana is all wired up for a 2nd AC unit in the front bedroom, but currently just has the standard vent. I am fairly mechanically inclined, but should this be left to the RV service shops? Since this would have to be installed to the highest point of the camper I was considering one of those slimline (9.75") AC Units. Do those work fairly well?
__________________
2006 Keystone Montana 3500RL
2016 Ram 2500 w/Air Bags & Slider Hitch
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07-20-2020, 11:59 AM
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#2
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Senior Member
Join Date: Apr 2012
Location: In the boonies outside Sarnia, Ontario, Canada
Posts: 332
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Just had the front A/C on our eagle this spring... I had it installed. I went with the ultra low profile 13.5k BTU Coleman unit. Have to make sure you stay under 13' 6" overall height.
Surprizing to us the new unit blows more air than the rear 15 k BTU unit in the rear.
As for the install the mobile service sent two guys. One pulling the unit up the ladder on rope and the other pushing. They layed a moving blanket on roof. Unit weighs 85 lbs. Ours had the full raceway ducting.
Turn off the power breaker for front a/c
Remove the front vent and interior trim ring
Clean up the butyl tape and self leveling stuff on roof.
Then cut the foil covering the ducting on each side
Pulled electrical box and thermostat wiring into hole
Put foam gasket under unit
Set square in hole
Install the control board and hook up electrical and thermostat
I tall the partion board
Install thermostat
Install the interior panel
We installed digital thermostat
Interior panel was a chill grille
It works great!
RoadrunnerII
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TV: 2016 F250 Lariat Screw 6.7 PSD
Trailer:2017 Jayco Eagle 321RSTS
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07-20-2020, 08:19 PM
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#3
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Community Moderator
Join Date: Aug 2018
Location: Full timing
Posts: 6,324
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Quote:
Originally Posted by PulNSerenity
How hard is it to install an ac unit from scratch? Our 38' Montana is all wired up for a 2nd AC unit in the front bedroom, but currently just has the standard vent. I am fairly mechanically inclined, but should this be left to the RV service shops? Since this would have to be installed to the highest point of the camper I was considering one of those slimline (9.75") AC Units. Do those work fairly well?
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Give these guys a call:
https://fixyourfridge.com/
I was there the 1st of July and they had several kinds sitting around. A friend had both of his replaced a couple of years ago and they gave them a 2 year warranty
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2018 Road Warrior 427
2013 Can Am Spyder RT Limited
2017 Ram 3500 w/Aisin w/4:10
2 Dachshunds DJ (RIP 9-12-19) & Joey (RIP 5-14-21)
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07-21-2020, 07:23 AM
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#4
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Senior Member
Join Date: Mar 2018
Location: Harlingen, TX
Posts: 938
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I have done the job myself. Not all that difficult, but I don’t want to do it again. If you’re going to do it yourself, make sure you have a second person. They are bulky and heavy.
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Tommy, Tiffany and Trace (along with the 4-legged children: Lexus and Chance)
2005 Alpine Coach 40FDTS
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07-21-2020, 07:40 AM
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#5
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Senior Member
Newmar Owners Club Workhorse Chassis Owner Spartan Chassis
Join Date: May 2010
Location: McAlester Ok
Posts: 2,057
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Beware..a new unit, may or may not be compatible with an older thermostat. I just had a Penguin2 installed. You had to buy and install an addition board for it to work with my old thermostat
__________________
2007 Newmar KSDP. 3912
2010 Nissan Frontier SE
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07-21-2020, 10:28 AM
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#6
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Senior Member
Join Date: Mar 2018
Location: Harlingen, TX
Posts: 938
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Quote:
Originally Posted by DGBPokes
Beware..a new unit, may or may not be compatible with an older thermostat. I just had a Penguin2 installed. You had to buy and install an addition board for it to work with my old thermostat
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Correct. New Dometic units require the CCCII thermostat. That’s an incredibly simple part of the install.
__________________
Tommy, Tiffany and Trace (along with the 4-legged children: Lexus and Chance)
2005 Alpine Coach 40FDTS
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07-22-2020, 05:14 AM
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#7
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Senior Member
Join Date: Aug 2019
Location: Dayton, Ohio
Posts: 357
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Quote:
Originally Posted by DGBPokes
Beware..a new unit, may or may not be compatible with an older thermostat. I just had a Penguin2 installed. You had to buy and install an addition board for it to work with my old thermostat
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Yeah I have learned that lesson on my house thermostat. This will be an install from scratch. There is nothing there currently. The more I look at other large 5th wheels, it really surprises me that my 38 footer does not already have two units from the factory. The unit in the rear does alright but if the sun is really beating down on the roof the cold air in the duct work gets warmed before it makes it all the way to the front. If the wife starts to complain I tell her it's still much cooler than the tent we were in last year!
__________________
2006 Keystone Montana 3500RL
2016 Ram 2500 w/Air Bags & Slider Hitch
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