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Old 06-19-2017, 12:08 AM   #21
Forsch
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M.O.C. #20034
Has anyone contacted Keystone about adding the third air conditioner? What do they recommend?

I just came back from a trip in 118 degree weather with little shade. The two A/C's were able to maintain about 80 degrees during the day with very little door opening, but that is not good enough for me. I know I will have to do some cleanup of the factory ductwork to get better results. I am also going to add additional duct outlets. I did that on a 2007 Eclipse Stellar and was able to maintain 70 degrees at the same RV park with the same temperatures. I was thinking of adding the third air conditioner so maybe they didn't have to work so hard.

I'm just wondering what Keystone recommends.

Thanks for any comments or recommendations.
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Old 06-19-2017, 11:01 AM   #22
bshgto
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can`t make this stuff up

If you want a 3rd A/C it would not be a difficult task for a seasoned electrician to fish a wire from the non-moving cabinet wall to the ceiling vent for a 3rd A/C and have it tail out at the 50amp plug location on the back of the camper. then you could just use a 20 or 30 amp receptacle with a matching cap and cord over to the power pole along with e 50 amp cord. This would keep the moon and stars in balance and you wouldn`t have to juggle around appliance use. " Wait honey you can`t dry your hair just yet the 3rd a/c is on... You said what? OK OK I`ll turn it off
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Old 06-19-2017, 11:34 AM   #23
DQDick
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Actually you've missed the point. The new Montana's are already wired for a third AC unit. You take the vent out over the entry way (on our unit) and, supposedly, it is already wired for it right there.
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Old 06-19-2017, 03:10 PM   #24
bshgto
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can`t make this stuff up

Quote:
Originally Posted by DQDick View Post
Actually you've missed the point. The new Montana's are already wired for a third AC unit. You take the vent out over the entry way (on our unit) and, supposedly, it is already wired for it right there.
AH yes but from what I`ve heard (which maybe incorrect) you have to stager what units you run and that would defeat the purpose of running all 3 at once to cool the unit in the stinking hot days. My way is safe and will solve the problem. If the units are wired for a 3rd a/c then this would make it even easier to connect just pull the wire out of the panel and extend it to the rear and follow the other instructions. Bingo
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Old 06-19-2017, 04:18 PM   #25
Forsch
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M.O.C. #20034
So I called Keystone today and spoke to one of the people in production. He said while the coaches are wired for three air conditioners, they are not capable of running all three at the same time.

Here is what I found out:

The coach is wired for a third air conditioner that is non ducted (dump only). The power wiring and thermostat wire are both in the outlet next to the fan unit that will be replaced by the new air conditioner. The other end of the thermostat wire is routed to the rear of the existing wall thermostat in the main living area. I was told the added unit can be a 15,000 BTU.

Camping World made a call to Dometic (existing units are Dometic) and they were recommended the Blizzard NXT unit. The unit that was quoted with all necessary hardware installed was quoted at $1,700.

So my plan is to add the third unit. I will then check all of the ducting of the existing units. I will open any collapsed duct and aluminum tape all points of intake. After that I will cut down or replace all duct vents and seal with aluminum tape. I also plan to add at least two additional vents in the bedroom, maybe four if there is room. I am also going to add two, possibly four, in the living room. I am also going to look into blocking the furnace vents and the vents under the stairs. I will make them easily removable, but I doubt I will ever use the furnace. We have the fireplace and the heat pump in one of the A/C units, witch are more than enough heating for my wife and me.

I know this seems like overkill, but I hate being hot.

Also, according to Keystone the info given by bshgto is the only way to run all of the A/C's at the same time.

Thank you to all who have added their experience to this issue.
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Love the cold, dislike the heat (A/C is my friend)
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Old 06-19-2017, 05:18 PM   #26
DQDick
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If you look at other manufacturers that are doing this they are using an energy management system that staggers when they can come on, but lets them run all at once similar to a unit the electric company installed on my stick house once. Still trying to see if that could be adapted to a Monty.
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Old 06-19-2017, 07:24 PM   #27
Forsch
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M.O.C. #20034
That would be nice. If you find something please let us know.
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2017 Montana 3160RL Legacy (6th trailer)
2017 Ford F-350 Crew Cab 6.7L 4X4
Love the cold, dislike the heat (A/C is my friend)
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Old 06-19-2017, 10:59 PM   #28
MARK A
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M.O.C. #18157
Quote:
Originally Posted by Forsch View Post
So I called Keystone today and spoke to one of the people in production. He said while the coaches are wired for three air conditioners, they are not capable of running all three at the same time.

Here is what I found out:

The coach is wired for a third air conditioner that is non ducted (dump only). The power wiring and thermostat wire are both in the outlet next to the fan unit that will be replaced by the new air conditioner. The other end of the thermostat wire is routed to the rear of the existing wall thermostat in the main living area. I was told the added unit can be a 15,000 BTU.

Camping World made a call to Dometic (existing units are Dometic) and they were recommended the Blizzard NXT unit. The unit that was quoted with all necessary hardware installed was quoted at $1,700.

So my plan is to add the third unit. I will then check all of the ducting of the existing units. I will open any collapsed duct and aluminum tape all points of intake. After that I will cut down or replace all duct vents and seal with aluminum tape. I also plan to add at least two additional vents in the bedroom, maybe four if there is room. I am also going to add two, possibly four, in the living room. I am also going to look into blocking the furnace vents and the vents under the stairs. I will make them easily removable, but I doubt I will ever use the furnace. We have the fireplace and the heat pump in one of the A/C units, witch are more than enough heating for my wife and me.

I know this seems like overkill, but I hate being hot.

Also, according to Keystone the info given by bshgto is the only way to run all of the A/C's at the same time.

Thank you to all who have added their experience to this issue.
Before you go chopping up your rig, your A/C duct works on pressure. The entire duct system must pressurize before any air will come out. if you chop more holes than the fan can fill, you will see a decrease in flow from your system.
I would probably try adding one of the portable ones that sit on the floor and exhaust through a flex vent in a window if it was that darned hot.

Mark
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