Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-15-2024, 06:48 AM   #41
fatcatzzz
Montana Fan
 
Join Date: Jun 2014
Location: Kamiah
Posts: 337
M.O.C. #14438
Angry

Quote:
Originally Posted by suny07 View Post
I have the impression they want me to go away.
Quite disappointing.
I am afraid you might be correct. I do not have 2023, but my third AC is direct dump. Also I have never heard of a H-frame system. I have been in several Montana fifth wheel and all have had direct dump AC for their third AC.

This is one of the reasons I am looking to purchase SOB in September. Keystone has lost all creditability with me.

Good luck with your problem.
 
__________________
Ron&Sue
2017 Montana 3720RL Legacy
14' Ram 3500 DRW
fatcatzzz is offline   Reply With Quote
Old 07-17-2024, 11:52 AM   #42
Ozzie66
Established Member
 
Ozzie66's Avatar
 
Join Date: Jul 2023
Location: Gardnerville
Posts: 20
M.O.C. #33103
Bourbon Country, please tell us what your "$100 fix" is that you mentioned on your other post from a year ago about "AC Issues" Thanks. Ozzie
__________________
Dick (Ozzie) and Jane
2024 Montana 3123RL, Legacy, Cobalt, 440i
2017 GMC Denali 3500HD
Ozzie66 is offline   Reply With Quote
Old 07-17-2024, 12:10 PM   #43
Carl n Susan
Site Team
 
Carl n Susan's Avatar
 
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,540
M.O.C. #4831
Quote:
Originally Posted by Ozzie66 View Post
Bourbon Country, please tell us what your "$100 fix" is that you mentioned on your other post from a year ago about "AC Issues" Thanks. Ozzie
I suspect you are referring to "Bourbon County" not Country. Do you have the link to this year old Post?
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB

Carl n Susan is offline   Reply With Quote
Old 07-18-2024, 09:13 AM   #44
Bourbon County
Montana Fan
 
Join Date: Feb 2022
Location: Cynthiana
Posts: 241
M.O.C. #30449
I don't guarantee this to be an absolute fix, but will be of great improvement. For transparency, I have training and a now expired certificate in air balancing; as well as tools to measure air flow.

The key to any forced air AC system, home or RV, air distribution is the secret sauce. The less restrictive the duct system, both supply and return is, the better the airflow. Basically all I did was to buy one of most every different vent on the market and did some measured testing. I determined the Valterra A10-3359VP to be the least restrictive. They are 5.5 inches ID as opposed to the 5.0 inch from the OEM so I did have to do some cutting. Believe it or not, just that extra half inch gives an additional 20% bigger opening. The larger opening combined with much less restrictive blades was ideal to me. I replaced all vents in the trailer except bathroom with them.

In the bathroom, I chose the Valterra A10-3354VP which is an adjustable model. When adjusted all the way up, it still allows some airflow. There is a very recent thread where folks talked about completely or largely taping closed the bath vent. When you think about it, that's the smallest room in the RV and in the models that have the bath at top of stairs, it's in the area of the racetrack duct with highest air pressure. With possibly the exception of shaving, the only times the room will be occupied longer than a few seconds the big exhaust fan will be running. It's smallest room with lowest occupancy, no need to pump so much air in there.

Next area: returns. I found the ceiling board not completely cut out under the frame for the filter element. Trace out the inner opening of the trim ring and cut out the ceiling board. With all the cut outs you make, tape up with the foil type duct tape. Dispose of the dorky foam filters from the factory. I'll link some I found on Amazon that will have to be cut to fit with scissors. It's a horse hair type filter made of polyester. I even run mine through the washer on low cycle. They are a MERV6 rating which is very low restriction. If you feel like you need air filtration, buy a floor standing HEPA model.

https://www.amazon.com/FilterTime-Al...zcF9hdGY&psc=1

Once this is done, you can start doing some crude balancing. In addition to the bathroom, the other vents that fall near midway between the 2 units along the racetrack duct will be the ones you can close partially. When pointing the louvers be cautious not to point them directly toward a return. That's called an air short circuit because it's mostly just being pulled right back into the return. I found the ones closest to rear of RV worked better pointing to the rear.

This will be mostly trial and error; if you do want to be more scientific about it, there are some anemometers on Amazon in the $30 range that will work fine. I'll be glad to link them as well as instructions to make a capture hood if you're interested.

I documented and charted all my readings and will post if I can find them. I did get a 28% increase in total air flow, and putting in the right place makes a huge difference. I did find that leaving both units with blowers on manual high worked better over time.
Bourbon County is offline   Reply With Quote
Old 07-18-2024, 10:38 AM   #45
Ozzie66
Established Member
 
Ozzie66's Avatar
 
Join Date: Jul 2023
Location: Gardnerville
Posts: 20
M.O.C. #33103
Quote:
Originally Posted by Carl n Susan View Post
I suspect you are referring to "Bourbon County" not Country. Do you have the link to this year old Post?
Carl n Susan, thanks. I found the Bourbon County post by my MOC search: general
discussions/about our Montanas/Air Conditioning Issues: Here it is:
06-28-2023, 01:52 PM #14
Bourbon County
Montana Fan

Join Date: Feb 2022
Location: Cynthiana
Posts: 234
M.O.C. #30449
Did you have an opportunity to measure temps to see if your AC units are working properly? If you did, could you post your readings?

You mentioned the vents closest to the unit were getting less airflow. In my experience with the Keystone racetrack duct, you have 2 different units on opposite ends of the coach blowing into common ducts. If both units are running or if the blowers are running in manual, the airstreams just but heads in the middle of the duct. This configuration puts the highest concentration of air pressure near the middle of the coach, which is where you probably need it the least. They tend to deliver the least air at either end of the RV.

I realize your camper is brand new and as long as the ACs are running, they won't do anything under warranty. Keystone isn't going to pay someone to replace their patented blade diffusors. There is a way to correct this for about $100. I did this to mine and improved airflow by >30% and more importantly, put more cooling in the rear of the coach. I'll be glad to share if you're interested.
__________________
Dick (Ozzie) and Jane
2024 Montana 3123RL, Legacy, Cobalt, 440i
2017 GMC Denali 3500HD
Ozzie66 is offline   Reply With Quote
Old 07-18-2024, 11:36 AM   #46
Ozzie66
Established Member
 
Ozzie66's Avatar
 
Join Date: Jul 2023
Location: Gardnerville
Posts: 20
M.O.C. #33103
Bourbon County, thank you very, very much for all the info on how to improve our AC system. I hope that I can call on your expertise when I get into doing the system improvements.
Ozzie
__________________
Dick (Ozzie) and Jane
2024 Montana 3123RL, Legacy, Cobalt, 440i
2017 GMC Denali 3500HD
Ozzie66 is offline   Reply With Quote
Old 07-18-2024, 12:08 PM   #47
Bourbon County
Montana Fan
 
Join Date: Feb 2022
Location: Cynthiana
Posts: 241
M.O.C. #30449
Quote:
Originally Posted by Ozzie66 View Post
Bourbon County, thank you very, very much for all the info on how to improve our AC system. I hope that I can call on your expertise when I get into doing the system improvements.
Ozzie
Thanks for the call out. I will be glad to offer whatever assistance I can be.

I see you have a new model; if it has the H-frame duct system that's been discussed, it might be a little different. Larger and less restrictive vents and less restrictive return filters are never a wrong move. Your balancing might work out a little different. The way I see it, the turbulence in the H-frame duct system will be at the ends of the ducts rather between the 2 units like it is with the racetrack.

It might be worth buying an anemometer and measuring to see where most of the air is going before trying to do any adjustments.
Bourbon County is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 12:14 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.