| 1978 Kingsley - Two Roof ACs ?? [message #371261] |
Mon, 03 April 2023 12:52  |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma: 1
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Greetings from Southern California !!
I volunteered to help a friend install a second AC unit in his 1978 Kingsley.
Am i going to be lucky enough to find it pre-wired ??
50 amp shore power will drive both - yes ??
I don’t have the opportunity to visit the coach immediately - just beginning to gauge the work effort…
Thanks !!!!
Steve W
1973 23. Yellow
Steve W
1973 : 23'
Southern California
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| Re: 1978 Kingsley - Two Roof ACs ?? [message #371263 is a reply to message #371261] |
Mon, 03 April 2023 13:46  |
Greg C.
Messages: 224
Registered: October 2019
Location: Knoxville, TN
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Probably. My 1977 Royale only has one a/c, but when I was replacing a vent exhaust fan, I found a 12-2 w/g Romex cable fed to the edge of the vent for another a/c. Mine being fitted out from Coachman with only 1 a/c, I have a 30 amp service. So I think that the extra a/c cable may have been installed at the GMC assembly line and not at Coachman.
So chances are good you have the extra cable, but you probably need to open the AC panel and make up the cable to a breaker. My cable is in the breaker box with wire nuts on it, not connected to any breaker. 50 amp service will run two a/cs, especially the newer ones.
Greg Crawford
KM4ZCR
Knoxville, TN
"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags
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| Re: 1978 Kingsley - Two Roof ACs ?? [message #371264 is a reply to message #371263] |
Mon, 03 April 2023 14:55 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Greg, I added the second AC to my 78 Royale. I was happy to find the wiring at the vent. Who knows what may have been changed after nearly 50 years, but I believe Coachman set up the 30 amp shore line to only support one generator but the Onan is wired to support both generators. Rather than upgrade to 50 amp service, I just added a separate 110v 20-amp shore line to supprot the second AC. That allows me to run the second AC off my little Honda 2000 generator. The second AC is a smaller Coleman 11,000 BTU energy saver model. I can run it off the Honda, the Onan, or campground shore power.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: 1978 Kingsley - Two Roof ACs ?? [message #371265 is a reply to message #371261] |
Mon, 03 April 2023 19:35 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Just be sure that the Air Cond breakers are positioned in tbe box so that they are not on the same leg. One should be on L1 and the other on L2, with remaining loads also split as evenly as possible on remaining breakers. .
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: 1978 Kingsley - Two Roof ACs ?? [message #371266 is a reply to message #371265] |
Mon, 03 April 2023 22:19 |
mghamms
Messages: 466
Registered: March 2016
Location: Ware, Massachusetts
Karma: 2
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I had to run wires to the rear vent on my 77 kingsley.
Also I had to square the round corners and add aluminum Chanels to frame the opening.
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
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| Re: 1978 Kingsley - Two Roof ACs ?? [message #371270 is a reply to message #371264] |
Wed, 05 April 2023 11:58 |
Greg C.
Messages: 224
Registered: October 2019
Location: Knoxville, TN
Karma: 0
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Steve, I would say that you are correct. My Royale has a 50 amp receptacle from the Onan. I use an adapter to plug the coach's panel into the generator receptacle when I want to use it. It would be pretty easy to convert the panel into a 50 amp from what I have seen. I think I read somewhere that all the Onan receptacles in the GMC's are 50 amp, but I may have that wrong.
That's a pretty good idea to run a separate line for the extra A/C. That gives you the option to use a generator or plug both the 30 and 20 amp lines into a power pedestal.
Greg Crawford
KM4ZCR
Knoxville, TN
"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags
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