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dwdlt
04-23-2021, 05:33 AM
Good morning All,

I'm going to be installing a second AC on my travel trailer this weekend, and I wanted to reach out to the experts on here to see if you have any specific things I need to watch for?

I have a 2016 Laredo 314RE, it is prewired for the second AC in the bedroom, does have 50 am service that I use often, and the AC unit I bought was the Dometic Brisk Air II, 15k unit.

I did a search on this forum and found a bunch of post about AC units, but none specific enough to provide any detailed "gotcha's" to watch out for.

Any advice provided would be much appreciated.

Thanks

Dale

chuckster57
04-23-2021, 05:53 AM
Does your unit have in command? Did you buy a ducted or non ducted AC? Thermostat controlled or plenum controlled?

markcee
04-23-2021, 05:58 AM
Good morning All,

I'm going to be installing a second AC on my travel trailer this weekend, and I wanted to reach out to the experts on here to see if you have any specific things I need to watch for?

I have a 2016 Laredo 314RE, it is prewired for the second AC in the bedroom, does have 50 am service that I use often, and the AC unit I bought was the Dometic Brisk Air II, 15k unit.

I did a search on this forum and found a bunch of post about AC units, but none specific enough to provide any detailed "gotcha's" to watch out for.

Any advice provided would be much appreciated.

Thanks

Dale

Be careful getting it on the roof!

After mulling over various 'plans' I ended up putting the boxed unit in the bed of the truck and parked the truck alongside the trailer. I then stood a ladder up in the truck bed to the trailer at a pretty good angle and pushed the unit ahead of me to the roof to a waiting helper.

Using the truck bed cut several feet off the trip up and I could also use the bed rail as an intermediate point to set the box while I got into position.

Other than that, our install was pretty painless. About 2-1/2 hours start to finish including getting it talking to our InCommand system.

dwdlt
04-23-2021, 06:20 AM
Does your unit have in command? Did you buy a ducted or non ducted AC? Thermostat controlled or plenum controlled?

It's non-ducted and plenum controlled. No in-command

dwdlt
04-23-2021, 06:22 AM
Be careful getting it on the roof!

After mulling over various 'plans' I ended up putting the boxed unit in the bed of the truck and parked the truck alongside the trailer. I then stood a ladder up in the truck bed to the trailer at a pretty good angle and pushed the unit ahead of me to the roof to a waiting helper.

Using the truck bed cut several feet off the trip up and I could also use the bed rail as an intermediate point to set the box while I got into position.

Other than that, our install was pretty painless. About 2-1/2 hours start to finish including getting it talking to our InCommand system.

I'm seeing that will be a challenge. Thanks for the note

flybouy
04-23-2021, 06:28 AM
First and foremast plan out your moves have what you need ready and COMMUNICATE clearly with your helper what your plans and moves are. Don't assume that they will "know where you are going" or" which way you will turn" when you get up there. I would place some protection on the roof before lugging an a/c unit over it. Some plywood (corners rounded anmd a moving blanket under it) so if you have to set it down you don't cut/puncture the roof membrane. Try to prepare or the "oh crap" moment ahead of time.
Good luck.

dwdlt
04-23-2021, 06:48 AM
First and foremast plan out your moves have what you need ready and COMMUNICATE clearly with your helper what your plans and moves are. Don't assume that they will "know where you are going" or" which way you will turn" when you get up there. I would place some protection on the roof before lugging an a/c unit over it. Some plywood (corners rounded anmd a moving blanket under it) so if you have to set it down you don't cut/puncture the roof membrane. Try to prepare or the "oh crap" moment ahead of time.
Good luck.

Yep, thanks. That is sound advice. I have precut some cardboard to laydown on the roof. Going to put a blanket under it as well. I think damaging the roof is my biggest fear. I have a hoist setup in my pole barn as well, so I'm studying that and looking at lifting the AC up using the hoist first, and then backing the trailer underneath of it....Yea, "what could go wrong there" LOL. As crazy as that sounds, I believe it'll work. I'll try to take a pic or two and post it here

Kojac
04-23-2021, 07:07 AM
The biggest problem I had was taking the vent off, it took up the most time. Lifted the AC up with bucket on tractor, and my DW helped with install, it took about 2 hrs total. Key is to take all the time you need!!

flybouy
04-23-2021, 07:13 AM
Yep, thanks. That is sound advice. I have precut some cardboard to laydown on the roof. Going to put a blanket under it as well. I think damaging the roof is my biggest fear. I have a hoist setup in my pole barn as well, so I'm studying that and looking at lifting the AC up using the hoist first, and then backing the trailer underneath of it....Yea, "what could go wrong there" LOL. As crazy as that sounds, I believe it'll work. I'll try to take a pic or two and post it here

If I had a pole barn and knew the rafter would support the unit on a hoist that's exactly what I would do.

chuckster57
04-23-2021, 08:10 AM
When you get the vent off, try to remove as much Dicor and putty/butyl tape as possible, That way the gasket will fit on a flat surface. When you tighten the 4 screws that hold the AC in place you want to compress the gasket to about 1/2 itís original thickness and tighten the bolts in stages.

B-O-B'03
04-23-2021, 11:45 AM
My son and I replaced the existing 15K AC on our trailer.

We used a ladder to slide the new unit up and the old unit down.

I also laid some 3/8" 2' X 4' plywood down, with towels under them to support my weight while on the roof.

It was a fairly easy job, with just the 2 of us.

-Brian

JRTJH
04-23-2021, 12:10 PM
Using plywood or OSB is IMHO better than using a side from a cardboard box to lay the air conditioner on. There are some "sharp things" around the 14" opening and a cardboard box may not provide all the protection needed. A sheet of plywood or OSB with a towel/moving blanket under it is much harder for that sharp corner to cut through... If it happens to cut through, there's nothing between the "sharp and your TPO roof".....

dwdlt
04-26-2021, 02:39 AM
When you get the vent off, try to remove as much Dicor and putty/butyl tape as possible, That way the gasket will fit on a flat surface. When you tighten the 4 screws that hold the AC in place you want to compress the gasket to about 1/2 itís original thickness and tighten the bolts in stages.

Good info! Thank you Sir.

dwdlt
04-26-2021, 02:42 AM
Using plywood or OSB is IMHO better than using a side from a cardboard box to lay the air conditioner on. There are some "sharp things" around the 14" opening and a cardboard box may not provide all the protection needed. A sheet of plywood or OSB with a towel/moving blanket under it is much harder for that sharp corner to cut through... If it happens to cut through, there's nothing between the "sharp and your TPO roof".....

Good point. After looking at the new AC unit, I can certainly see the sharp parts you are referring to. Will definitely use a piece OSB over top of a blanket. Thanks

xrated
04-26-2021, 05:33 AM
I don't have any pictures of this, but I hung a 4 sheave rope hoist in the aluminum tubing using a 3/8" eye bolt.....of my RV Carport....up in the eave of the support truss. I then used a piece of OSB 1/2" thick wood to set the unit on and tied 4 pieces of rope to it, one on each corner, use a bowline knot that I knew would not come loose. I then hoisted the unit up as far as I could get it (a short hook up was necessary) and tied the end of the rope off to keep it there. Then I backed the trailer under the hanging unit and lowered it down on top of the trailer. It worked perfectly and saved my old back a lot of strain. Work smarter, not harder is my motto!

goldtrigger
04-29-2021, 07:38 AM
Check the wiring before you get the AC up there. I thought mine was hot and ready for the AC and it was not. Make sure the connectors are correct between the AC and the wiring in the camper. I had to trace back to the fuse panel and put in a new breaker.

2011 Montana Mountaineer

LewisB
04-29-2021, 09:06 AM
Check the wiring before you get the AC up there. I thought mine was hot and ready for the AC and it was not. Make sure the connectors are correct between the AC and the wiring in the camper. I had to trace back to the fuse panel and put in a new breaker.

2011 Montana Mountaineer

Excellent point. "Pre-wired" doesn't necessarily mean the breaker will be installed and the wires connected in your WFCO power center. If you have to add these, I recommend you run the new AC unit on the "opposite side" of your 50A service. You may need to move some breakers and wires from side to side to accomplish this. But it is good to try to balance the load on each side of your 50A service. Well worth all the work!

Good luck.

Bandit12
04-29-2021, 10:16 AM
Good morning All,

I'm going to be installing a second AC on my travel trailer this weekend, and I wanted to reach out to the experts on here to see if you have any specific things I need to watch for?

I have a 2016 Laredo 314RE, it is prewired for the second AC in the bedroom, does have 50 am service that I use often, and the AC unit I bought was the Dometic Brisk Air II, 15k unit.

I did a search on this forum and found a bunch of post about AC units, but none specific enough to provide any detailed "gotcha's" to watch out for.

Any advice provided would be much appreciated.

Thanks

Dale

I see you are USAF retired, as am I. When I was active duty I was a jet engine mechanic, or as the AF called it "Aerospace Propulsion Craftsman". Whenever I had to go to the doctor for anything, I'd tell the doc, I won't tell you how to fix people as long as you don't tell me how to fix airplanes and we'll get along fine. That has served me well for over 40 years now. While I'm probably technically competent enough to do this type of install myself, I'd feel better paying someone qualified to do the job and know its done correctly and if I have any issues, I'd have warranty recourse.

Just my 2 cents worth.

Farside
04-29-2021, 10:45 AM
I see you are USAF retired, as am I. When I was active duty I was a jet engine mechanic, or as the AF called it "Aerospace Propulsion Craftsman". Whenever I had to go to the doctor for anything, I'd tell the doc, I won't tell you how to fix people as long as you don't tell me how to fix airplanes and we'll get along fine. That has served me well for over 40 years now. While I'm probably technically competent enough to do this type of install myself, I'd feel better paying someone qualified to do the job and know its done correctly and if I have any issues, I'd have warranty recourse.

Just my 2 cents worth.
Bandit, Thanks for your service. I too am USAF retired, aerial surveillance maintenance technician, and 25 years DoD. I've worked on a lot of black box stuff. And, I will agree with your philosophy about not having someone tell me how to fix my stuff. One thing I have learned out in the civilian world, paying someone that is supposedly qualified to do the job doesn't always guarantee it will actually be installed the way you had planned. Just look at how some of the manufacturers installed some of the items in your TT from the factory. Many a times I have gone back and redone stuff that should have been installed better.

JRTJH
04-29-2021, 01:48 PM
Bandit, Thanks for your service. I too am USAF retired, aerial surveillance maintenance technician, and 25 years DoD. I've worked on a lot of black box stuff. And, I will agree with your philosophy about not having someone tell me how to fix my stuff. One thing I have learned out in the civilian world, paying someone that is supposedly qualified to do the job doesn't always guarantee it will actually be installed the way you had planned. Just look at how some of the manufacturers installed some of the items in your TT from the factory. Many a times I have gone back and redone stuff that should have been installed better.

The "pitfall" of many people who rely on an RV dealer or on an auto service center is assuming that every technician in the back is competent at every job that business takes on.... Those businesses "will have someone certified to do the job you hire them to do"... The issue comes in when that technician is busy doing another job and the service manager, trying to keep everybody busy, assigns someone who has never done that job and has only a general idea of what to do... That's where any business can get in trouble, assigning someone who has no clue to do a job "ON YOUR TRAILER"....

sourdough
04-29-2021, 03:56 PM
I see you are USAF retired, as am I. When I was active duty I was a jet engine mechanic, or as the AF called it "Aerospace Propulsion Craftsman". Whenever I had to go to the doctor for anything, I'd tell the doc, I won't tell you how to fix people as long as you don't tell me how to fix airplanes and we'll get along fine. That has served me well for over 40 years now. While I'm probably technically competent enough to do this type of install myself, I'd feel better paying someone qualified to do the job and know its done correctly and if I have any issues, I'd have warranty recourse.

Just my 2 cents worth.


Be careful with the above philosophy. In our area the folks working on your RV rotate frequently. The best ones are there and more or less pick and choose the jobs they want. The rest are relegated to the group that "had experience last week doing "xyz" but have never been involved with an RV....different animal. I've seen those folks - and they are at most every dealership so be aware. I know the best techs at my dealership and my trailer always goes to the guy that's the best unless it is a specialized issue. Many of the others just figured out what a pair of dikes or a Robertson head is.

shiggs68
04-29-2021, 05:19 PM
Good morning All,

I'm going to be installing a second AC on my travel trailer this weekend, and I wanted to reach out to the experts on here to see if you have any specific things I need to watch for?

I have a 2016 Laredo 314RE, it is prewired for the second AC in the bedroom, does have 50 am service that I use often, and the AC unit I bought was the Dometic Brisk Air II, 15k unit.

I did a search on this forum and found a bunch of post about AC units, but none specific enough to provide any detailed "gotcha's" to watch out for.

Any advice provided would be much appreciated.

Thanks

Dale
The wire is a ground for the dual gas valve coils. It should be on the mounting screw just to the right.

And BTW, it has nothing to do with your tripping breaker. Suspect your electric heating element is going bad.

dwdlt
04-30-2021, 06:04 AM
Check the wiring before you get the AC up there. I thought mine was hot and ready for the AC and it was not. Make sure the connectors are correct between the AC and the wiring in the camper. I had to trace back to the fuse panel and put in a new breaker.

2011 Montana Mountaineer

Good point. Thank you

dwdlt
04-30-2021, 06:13 AM
Be careful with the above philosophy. In our area the folks working on your RV rotate frequently. The best ones are there and more or less pick and choose the jobs they want. The rest are relegated to the group that "had experience last week doing "xyz" but have never been involved with an RV....different animal. I've seen those folks - and they are at most every dealership so be aware. I know the best techs at my dealership and my trailer always goes to the guy that's the best unless it is a specialized issue. Many of the others just figured out what a pair of dikes or a Robertson head is.

All good points. I am one of those busted knuckle types that does primarily all of my own work. I very rarely pay anybody else to do anything and that includes roofing the house, building garage...u name it. DW does not agree and has had a few choice words for me when I screw something up, but I always do my research and get it taken care of. I just do not trust anybody else to be as anal about things getting done right as I am. Character flaw I know, but it is what it is....With that said, the folks on this forum have a WEALTH of knowledge and have provided me guidance several times when I run into problems with my RV.

dwdlt
04-30-2021, 06:20 AM
I see you are USAF retired, as am I. When I was active duty I was a jet engine mechanic, or as the AF called it "Aerospace Propulsion Craftsman". Whenever I had to go to the doctor for anything, I'd tell the doc, I won't tell you how to fix people as long as you don't tell me how to fix airplanes and we'll get along fine. That has served me well for over 40 years now. While I'm probably technically competent enough to do this type of install myself, I'd feel better paying someone qualified to do the job and know its done correctly and if I have any issues, I'd have warranty recourse.

Just my 2 cents worth.

Good points. And, in theory I agree with you. But, I'm one of those hard headed guys who like to do all my own stuff I recon. I realize that may not be the wisest thing! :) By the way, I was a flying Crew Chief on the C141 before they retired it. Best days ever! I have been retired for almost 15 years, and have not been on a C141 since the early 90's, but to this day I can still remember the enginers panel gauges, engine run procedures, and all the specs.... Can't find my keys or remember to take my meds, but I recall that stuff!!! LOL

dwdlt
05-10-2021, 09:57 AM
Update, and one last call for HELP...

Well, so far, all I have done is got my winch setup in pole barn to lift the AC onto the trailer, and I think that is going to work fine.... Next, I wanted to double check everything on the inside of the vent area before I did anything.

Good thing I did, because...even though it was advertised to be "2nd AC prepped" I do not see or cannot find any wiring at all in the opening.... I pulled the inside trim piece down, and I can see a hole in the wood frame where wiring should come through, but there is not electrical box, and no sign of wiring at all.... Am I missing something?

Kojac
05-10-2021, 11:40 AM
Check right in front of the vent for a cover that looks like its covering an electrical outlet,
my electric wire was rolled up in it!!

JRTJH
05-10-2021, 12:18 PM
You should find an electric outlet box with a blank plate just forward of the roof vent cutout. Remove the cover from the outlet box and the 120VAC wiring (and possibly the thermostat wiring) will be inside that box. It is close enough to the 14" roof vent cutout that it will be covered by the air conditioner ceiling grid wen the air conditioner is installed...

Here's a photo of what to look for. The decal may/may not be present.
In the second photo, you can see the plate, just forward of (below) the roof vent location with the ceiling trim strip between them...

I found these photos on another website, they are not mine.

dwdlt
05-10-2021, 02:26 PM
Check right in front of the vent for a cover that looks like its covering an electrical outlet,
my electric wire was rolled up in it!!

Yep, found it. Thanks

dwdlt
05-10-2021, 02:28 PM
You should find an electric outlet box with a blank plate just forward of the roof vent cutout. Remove the cover from the outlet box and the 120VAC wiring (and possibly the thermostat wiring) will be inside that box. It is close enough to the 14" roof vent cutout that it will be covered by the air conditioner ceiling grid wen the air conditioner is installed...

Here's a photo of what to look for. The decal may/may not be present.
In the second photo, you can see the plate, just forward of (below) the roof vent location with the ceiling trim strip between them...

I found these photos on another website, they are not mine.

Yep, I found it. If it were a snake I would have been done for! Thanks for the help.

Bandit12
05-10-2021, 04:19 PM
By the way, I was a flying Crew Chief on the C141 before they retired it. Best days ever! I have been retired for almost 15 years, and have not been on a C141 since the early 90's, but to this day I can still remember the enginers panel gauges, engine run procedures, and all the specs.... Can't find my keys or remember to take my meds, but I recall that stuff!!! LOL

Booger Hooker! LOL! I started out as a missile cop in Grand Forks from Jan 80 to Feb 85. Then I crosstrained as a jet engine mechanic. Actually, I was CUT trained as a DCC on C-5's out of Dover. Was there from May 85-Aug 94. Worked back shop, engine build up, engine ISO, DCM Staff (Job Control), aircraft debrief, and finally out on the flightline just as they were starting to put the specialists on the line with the crew chiefs. Many times I was assigned as the "crew chief" on a jet with nothing but specialists on the ground crew. Did C-5 run school at Dover, and in early 94, went to 141 run school at McGuire. Left Dover and went to Lajes for 2 years working enroute AMC ground maintenance. With 3 years to go to retirement, the USAF in it's infinite wisdom said, ya know, you ain't worked nothin but cargo birds for your entire maintenance career, we're gonna send your butt to Barksdale to work B-52's. Come September 1, I'll be retired for 22 years. Like you I can still remember the engineers panels for BOTH aircraft, I can still find my keys most of the time, but there are times, I forget why I walked into a room! LOL!

dwdlt
06-14-2021, 06:11 AM
Just posting a follow up with results: I finally got the second AC installed, and she is working fine. Took the trailer out last week, and everything worked great with the AC. The only final thoughts I would have is that removing the self leveling sealant from around the inlet after removing the vent is no joke! That was the longest and hardest part of the job.

As always, thanks to all those who replied and gave me tips on how to complete this job.