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03-27-2015, 02:43 PM
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#1
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Established Member
Join Date: Mar 2015
Location: Grants Pass
Posts: 24
M.O.C. #17142
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Dual Zone AC
Question we have: We just bought our new Montana. Came with two AC and the two zone thermostat panel. In regards to the bedroom upstairs (Zone 2), is it best for us to leave the AC vent open? If we close the vent, does the front AC force more cold air through the ducted vents in the trailer? Is the from AC even pushing air out of the two vents in the bedroom? Not sure what to do. We have never had two AC units before.
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03-27-2015, 02:52 PM
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#2
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Montana Fan
Join Date: Jan 2010
Location: Fulltiming
Posts: 313
M.O.C. #10012
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I think you will find that the bedroom (front A/C) is Zone 1 and the living room (rear A/C) in Zone 2. As for the vents, did Montana start putting in closable vents?
__________________
Steve and Diane Pena
SOB Owner
2014 F-350 Dually Diesel
Home is where we park it
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03-27-2015, 02:55 PM
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#3
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Montana Master
Join Date: Jul 2013
Location: Aguanga
Posts: 606
M.O.C. #13601
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I keep the dump vents closed most of the time in the front AC to directed more air through the ceiling vents. If it's really hot and I want a quick cool down (for me, not the rig), I'll open the dump vents and sit under it to cool off. That's about the the only time they are open.
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03-27-2015, 03:04 PM
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#4
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Established Member
Join Date: Mar 2015
Location: Grants Pass
Posts: 24
M.O.C. #17142
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With the bedroom dump vent closed, does the second AC on top of the bedroom direct air through the duct system to the main living area with the rear AC running or is it just forcing cool air out of the two circular vents in the bedroom? I guess I need clarification on how the duct system works with two AC units running at the same time
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03-27-2015, 03:26 PM
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#5
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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In our unit, the bedroom is Zone 2 and the living room is zone 1 with the whisper air. The bedroom AC is ducted throughout the fiver. Closing the bedroom ac vent makes it quieter in the bedroom and pushes more cold air into the ducting. If you run both at the same time, cools the unit faster through the shared ducting.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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03-27-2015, 03:30 PM
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#6
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Established Member
Join Date: Mar 2015
Location: Grants Pass
Posts: 24
M.O.C. #17142
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Quote:
quote:Originally posted by 1retired06
In our unit, the bedroom is Zone 2 and the living room is zone 1 with the whisper air. The bedroom AC is ducted throughout the fiver. Closing the bedroom ac vent makes it quieter in the bedroom and pushes more cold air into the ducting. If you run both at the same time, cools the unit faster through the shared ducting.
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Thank you
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03-27-2015, 04:52 PM
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#7
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Montana Master
Join Date: May 2011
Location: Fayetteville
Posts: 4,200
M.O.C. #11401
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The living room AC is zone1and bedroom is 2. The dump door on the BR AC are for quick cool down. In normal operation both supply cool air through vents throughout coach. There is a small conical device near the ceiling in the BR. It is the sensor for the bedroom. Therefore dual zone. The temp for each zone is set separately on the thermostat. We usually like our bedroom cooler. It's a good system.
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03-27-2015, 06:25 PM
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#8
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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We want the bedroom ac to run more of the time in order to equally share the load so we have the dump in the bedroom 3/4 closed so it sends more cold air out of the bedroom then it dumps in. Try different things and you'll find what works best for you and the way you us your rig.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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03-31-2015, 01:35 AM
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#9
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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Our bedroom (zone 2) generally has the interior roof vent closed unless we want to cool the bedroom quickly. Another thing we use our Zone 2 for is when camping in noisy campgrounds we set it on "low fan" and open vent. It masks the noise from outside the camper and lets us sleep.
__________________
Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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03-31-2015, 02:23 PM
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#10
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Montana Fan
Join Date: Jan 2010
Location: Fulltiming
Posts: 313
M.O.C. #10012
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They must have changed the zone assignments since they built my unit in 2009. Looks like the newer units are zone 1 for rear, zone 2 for front.
Did not realize the vent referred to was the quick dump thought it was the round ceiling vents. My ceiling vents are not closable.
Is the front AC unit on the new units still through the ceiling in the bedroom and not configured like the L/R for quiet running? If so, does it still wake you up at night when it comes on? We set our zone 2 (L/R) unit to a lower temp at night so it comes on and not the zone 1 (B/R) unit. During the day we reverse that setting so the L/R unit does not come as often.
__________________
Steve and Diane Pena
SOB Owner
2014 F-350 Dually Diesel
Home is where we park it
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03-31-2015, 02:29 PM
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#11
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Established Member
Join Date: Mar 2015
Location: Grants Pass
Posts: 24
M.O.C. #17142
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Yes Steve, Zone 1 is the LR and Zone 2 is now the BR. We haven't run the ACs at night yet and YEA, no AC today. Finally nice temps in the 70's
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04-01-2015, 01:46 PM
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#12
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Montana Master
Join Date: Mar 2014
Location: Sioux Falls
Posts: 505
M.O.C. #14162
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Just remember that the BR unit is in the same zone as the furnace.
__________________
Steve & Sheryl Engels
2018 Montana 3790RD
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04-01-2015, 06:01 PM
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#13
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Montana Master
Join Date: Jan 2009
Location: Land O Lakes
Posts: 932
M.O.C. #9053
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Wow, there are some differing set ups. In our 09, unlike some of you out there, LR is zone one. Reason is simple; many do not get the second AC unit up front, so LR unit is zone 1 and only! If you add 2nd AC, it's zone 2. Also, unlike Stengels, our furnace is the same zone as LR, not BR, probably for the same reason. That's how the factory sent it out.
__________________
Walt and Carol Ashley, with fond memories of Bailey the Chesapeake! Land O Lakes, FL
2009 Big Sky 365REQ 10th Anniversary Edition
2008 Ford F350 King Ranch Super Duty
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