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06-27-2011, 08:53 AM
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#1
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Senior Member
Join Date: Jul 2009
Location: San Antonio, Texas
Posts: 661
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We have two AC units and two zones on the thermostat. Up until recently I thought that meant Zone 1 was the front of the coach and Zone 2 was the rear. I don't know why we are just now discovering that this may not be the case after 1 1/2 years of owning our coach. 
While exercising the generator last week with only Zone 1 AC on and Zone 2 off, I discovered cold air blowing from every ceiling vent from front to back.
So, where is Zone 2, or is this just the designation for the second AC unit?
The zones are definitely separate for the hydronic furnace and blowers, front and back.
Any insight would be appreciated.
Thanks
Don
__________________
2009 Newmar 42 ft. Allstar 4188, Wheelchair Accessible, 400HP Cummins ISL, Allison 3000, Mastertow Dolly, '98 Riviera 
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06-27-2011, 08:58 AM
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#2
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Junior Member
Winnebago Owners Club
Join Date: Jun 2011
Posts: 3
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Don:
My older W has a front a back switch. I can only operate one at a time on shore power, but I only have 30 amp service. When I run generator both can operate when on front switch.
Wayne
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06-27-2011, 09:24 AM
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#3
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Senior Member
Join Date: Aug 2009
Posts: 363
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We have 3 ac/heat pumps all ducted together. The vents closest to the unit running blow the most.
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2011 Entegra Cornerstone 45' & ISM 500 
24" Stacker w/toys
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06-27-2011, 11:33 AM
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#4
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Senior Member
Appalachian Campers Newmar Owners Club Ford Super Duty Owner Coastal Campers Nor'easters Club
Join Date: Mar 2009
Posts: 703
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In most Newmar coaches there is one supply and one return duct that both A/C units feed into. You should find the flow strongest in the front when you have Zone 1 on and strongest in the back when you have Zone 2 on. I have installed a baffle so that less air flows out the back when we have Zone 1 on.
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Stewart, Brenda and kids
2008 Newmar Canyon Star 3410
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06-27-2011, 11:48 AM
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#5
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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The last two posters got it right about the common duct.
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Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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06-27-2011, 11:50 AM
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#6
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Senior Member
Newmar Owners Club Workhorse Chassis Owner
Join Date: Oct 2007
Location: Michigan
Posts: 2,595
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Quote:
Originally Posted by Route 66
The last two posters got it right about the common duct.
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X2
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Steve & Sally / HiTee & Hudson Our Little Poms / Heidi & Houston Forever in our Hearts
04 NEWMAR MACA 3778 W22 / 05 PT Vert / Demco KAR KADDY SS
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06-27-2011, 12:21 PM
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#7
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Senior Member
Newmar Owners Club Ford Super Duty Owner
Join Date: Jun 2009
Location: West Michigan
Posts: 688
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Quote:
Originally Posted by Luv2go
In most Newmar coaches there is one supply and one return duct that both A/C units feed into.....I have installed a baffle so that less air flows out the back when we have Zone 1 on.
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Stewart - I am curious how you did that? There is no direct access to the ducting that I can see. 
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Dave 
2010 Canyon Star 3647 / 2010 Ford Escape
1943 Wife / 2003 Calico Cat (The boss)
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06-27-2011, 01:45 PM
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#8
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Community Moderator
Nor'easters Club Newmar Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Salisbury,Ma. 01952
Posts: 13,607
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DandS, You can stuff some piece of foam into the AC exhaust ports in duck after taking out one of the vents for access.
Cut it over size so stays in area you put it incase you want to remove it.
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06-27-2011, 01:53 PM
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#9
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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Ditto.
Quote:
Originally Posted by "007"
DandS, You can stuff some piece on foam into the AC exhaust ports in duck after taking out one of the vents for access.
Cut it over size so stays in area you put it incase you want to remove it.
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Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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06-27-2011, 01:57 PM
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#10
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Senior Member
Newmar Owners Club Ford Super Duty Owner
Join Date: Jun 2009
Location: West Michigan
Posts: 688
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Cool - Thanks guys !
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Dave
2010 Canyon Star 3647 / 2010 Ford Escape
1943 Wife / 2003 Calico Cat (The boss)
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06-27-2011, 06:01 PM
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#11
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Senior Member
Join Date: Jul 2009
Location: San Antonio, Texas
Posts: 661
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Wow. Ask and you shall receive, as always. Thanks a bunch. I thought I had another repair item to take care of.
Don
__________________
2009 Newmar 42 ft. Allstar 4188, Wheelchair Accessible, 400HP Cummins ISL, Allison 3000, Mastertow Dolly, '98 Riviera
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06-27-2011, 06:05 PM
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#12
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Senior Member
Join Date: Jul 2009
Location: San Antonio, Texas
Posts: 661
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Should you also stuff foam in the air return duct opposite the exhaust duct vent?
Don
__________________
2009 Newmar 42 ft. Allstar 4188, Wheelchair Accessible, 400HP Cummins ISL, Allison 3000, Mastertow Dolly, '98 Riviera
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06-27-2011, 06:22 PM
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#13
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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Maybe.
It will depend on having enough return vents in each zone to allow for sufficient air flow through each AC.
Quote:
Originally Posted by akadeadeye
Should you also stuff foam in the air return duct opposite the exhaust duct vent?
Don
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__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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