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08-13-2015, 10:00 AM
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#1
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Member
Newmar Owners Club Texas Boomers Club Freightliner Owners Club
Join Date: Jul 2015
Location: Houston, Texas
Posts: 93
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Operating Roof A/C while traveling- 2015 DS
I have gotten mixed opinions as to ability to run roof A/C units while traveling. I have a 2015 DS 4366. Is it possible to run roof A/C with only the engine running, or does it require the generator to be running? Any comments on this situation would be appreciated.
__________________
Larry & Nancy Harn plus 2 Yorkies Maggie & Baxter
2021 Entegra Esteem 29V, 6" Weld Tec Lift
2015 Jeep Wrangler, Blue Ox Tow Bar
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08-13-2015, 10:12 AM
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#2
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Registered User
Join Date: Mar 2010
Posts: 8,777
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Quote:
Originally Posted by LJH48
I have gotten mixed opinions as to ability to run roof A/C units while traveling. I have a 2015 DS 4366. Is it possible to run roof A/C with only the engine running, or does it require the generator to be running? Any comments on this situation would be appreciated.
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LJH48
Unless Newmar came up with a a miracle solution in 2015, you will need to run your generator.
Mel
'96 Safari
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08-13-2015, 10:20 AM
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#3
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Senior Member
Join Date: Feb 2012
Posts: 1,138
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Larry: I could not find any info on the topic that made me believe you could run roof AC on engine power. I think it is tied to the gennie like in most units. Many of us run the gennie while driving down the road...but our manuals say it is a safety issue.
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Craig Gosselin
1994 Fleetwood 33H
1995 Fleetwood 30H (parts vehicle)
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08-13-2015, 10:34 AM
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#4
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Senior Member
Join Date: May 2014
Posts: 3,059
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You have to run the generator for the source of power to the AC's while driving and when not hooked up to shore power. The Newmar manuals, or anything I've read do not say it's a hazard to run the generator while driving, they are built to run while driving.
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Mike & Charlotte
2014 Newmar Canyon Star 3610
Orange County, California
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08-13-2015, 10:46 AM
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#5
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Senior Member
Tiffin Owners Club
Join Date: Mar 2015
Location: Southern NM
Posts: 2,514
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Its amazing what you can learn just by reading the operators manual
What are these opinions you speak of concerning running the gen set while driving
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2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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08-13-2015, 11:03 AM
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#6
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Senior Member
Newmar Owners Club Nor'easters Club Appalachian Campers Ford Super Duty Owner Coastal Campers
Join Date: Dec 2007
Posts: 2,463
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I'm pretty sure Newmar does not wire any of the roof A/C's to the inverter, which would be necessary to run it on DC from the alternator and house battery bank. So the answer would be you must run the generator to run the roof A/C while traveling.
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Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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08-13-2015, 11:16 AM
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#7
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Senior Member
Join Date: May 2012
Posts: 3,816
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Yep, got to run the genny in everything but King Aire. For that model, you get 16 house batteries and a second inverter.
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2011 MVP Tahoe 230 QB on Ford E350 Chassis
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08-13-2015, 03:32 PM
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#8
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Member
Newmar Owners Club Texas Boomers Club Freightliner Owners Club
Join Date: Jul 2015
Location: Houston, Texas
Posts: 93
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Thank you for all the replies. This confirms my belief that the generator has to be running or be connected to adequate shore power. I'm going to challenge my dealer/service tech with this question again. Thanks for the ammunition.
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Larry & Nancy Harn plus 2 Yorkies Maggie & Baxter
2021 Entegra Esteem 29V, 6" Weld Tec Lift
2015 Jeep Wrangler, Blue Ox Tow Bar
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08-13-2015, 05:17 PM
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#9
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Welcome to the forum and irv2 Larry & Nancy.
If you want to challenge him even more look at the QT's links below in my signature than you will have all your answers from the good knowledgeable members on irv2.
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08-13-2015, 07:53 PM
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#10
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Senior Member
Join Date: Jun 2014
Location: Gulf Coast, Alabama
Posts: 2,450
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Quote:
Originally Posted by LJH48
Thank you for all the replies. This confirms my belief that the generator has to be running or be connected to adequate shore power. I'm going to challenge my dealer/service tech with this question again. Thanks for the ammunition.
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Larry, it's likely been said before (but my ADD doesn't allow me to read every post) but..... the engine spins the alternator, which in turn produces voltage to replenish the batteries. ALL of that stuff is 12 Volts
However, ALL of our A/C units operate on 120Volts. Your coach can produce 120V in one of two ways; either via genset operating and producing as much 120 as you need, or by your inverter, which takes the battery power and converts it...making the alternator really struggle if you're using the inverter for refrigerator, water heater, and A/C units.
There is virtually nothing gained by not using the appliance that produces just what your A/C units need; the genset. HTH
P.S. Mine was a generic response...and after reading some more threads that are specific to your coach, post #7 seems to sum it up.
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Rick and Sandy
2003 American Eagle, 59K miles
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08-13-2015, 08:48 PM
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#11
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RV Nut
Newmar Owners Club Winnebago Owners Club Nor'easters Club
Join Date: Oct 2014
Posts: 1,932
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Quote:
Originally Posted by LJH48
I have gotten mixed opinions as to ability to run roof A/C units while traveling. I have a 2015 DS 4366. Is it possible to run roof A/C with only the engine running, or does it require the generator to be running? Any comments on this situation would be appreciated.
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You would need a very large inverter and a very large battery bank in order to run the ACs on battery power. The DS (or even the Mountain Aire or Essex) doesn't have this capability.
YES, you need to run the generator to produce 110v AC for the roof top generators on your 2015 DS 4366. We run the generator all the time while traveling down the road in order to keep our 2015 Ventana 4037 cool in warm weather. It is a VERY common practice.
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2015 Newmar Ventana 4037 - All Electric
2012 Jeep Wrangler Unlimited Rubicon TOAD
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08-13-2015, 09:12 PM
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#12
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Senior Member
Newmar Owners Club Texas Boomers Club Freightliner Owners Club
Join Date: Feb 2014
Location: Cypress, Texas
Posts: 889
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Quote:
Originally Posted by LJH48
I'm going to challenge my dealer/service tech with this question again. Thanks for the ammunition.
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Larry,
Is your dealer/service tech Holiday World in Katy?
__________________
Scott & Lise
2015 Dutch Star 4381 - HWH Active Air, SilverLeaf Glass Dash & Total Coach
2011 Chevy Traverse w/Blue Ox Aventa and M&G Brake
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08-13-2015, 09:26 PM
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#13
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Senior Member
Join Date: Oct 2012
Location: Denton, TX, 76207
Posts: 2,160
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Quote:
Originally Posted by SWag
Larry,
Is your dealer/service tech Holiday World in Katy?
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 .
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Steve Pinn
2008 Newmar Essex-4514
2009 Honda CRV
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08-14-2015, 04:12 AM
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#14
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Senior Member
Join Date: Oct 2010
Posts: 794
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As a side note, make sure the generator breaker is in the "ON" position or you will get a controller E7 error code and your air will not run.
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Rich & Susan Roberts 2015 Dutch Star 4369..
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