| Roof AC wiring circuit on a 78 Royale? [message #91590] |
Sun, 11 July 2010 21:27  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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I'm trying to get the front roof air to operate on the generator. The front roof air works when the cord in plugged into 120V.
Referring to the panel located in the back between the rear beds--If I run the generator and switch the see-saw breaker to turn off the service cord and apply the current from the generator to the service panel, there is no power to the front roof air. However, the other 110V circuits for the tv, converter, and refrigerator do work on the generator. Both the double breaker and the ground fault breaker are in the 'on' position. In looking at the diagram, the breaker positions are switched in the service panel. Don't know if that makes a difference or not.
While the generator is running one breaker in the panel located by the right rear wheel well controls the service to the rear roof air. I don't know what the other breaker in that box controls. The rear ac does not operate on the service cord when it is plugged into 120V. I am thinking that I can operate the rear AC on a power cord plugged into a male receptacle on the outside left rear of the coach.
Their is another electrical box in the right rear of the coach that I have not idea as to its purpose.
Can someone enlighten me on how the roof ac circuits are suppose to be wired? and what position the switches should be in for the front roof air to work on the generator?
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: [GMCnet] Roof AC wiring circuit on a 78 Royale? [message #91594 is a reply to message #91590] |
Sun, 11 July 2010 21:42  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I have a 78 Royale w/side dry bath, two rear beds with a night stand in the
middle. The bottom door opens to expose 120 v breakers. On my coach when
running the Onan, the toggle must be switched to the Gen position and both
the brakers in the pass rear wheel compartment must be on. There are two
breakers in this panel. Then the roof AC will operate. I have a DuoTherm
with a 2 min compressor start relay. Hope this helps. I believe that my
coach is nearly stock in the wiring.
Jim Hupy
Salem, Or
78 Royale 403
On Sun, Jul 11, 2010 at 7:27 PM, John Sharpe <johnasharpe@earthlink.net>wrote:
>
>
> I'm trying to get the front roof air to operate on the generator. The
> front roof air works when the cord in plugged into 120V.
>
> Referring to the panel located in the back between the rear beds--If I run
> the generator and switch the see-saw breaker to turn off the service cord
> and apply the current from the generator to the service panel, there is no
> power to the front roof air. However, the other 110V circuits for the tv,
> converter, and refrigerator do work on the generator. Both the double
> breaker and the ground fault breaker are in the 'on' position. In looking
> at the diagram, the breaker positions are switched in the service panel.
> Don't know if that makes a difference or not.
>
> While the generator is running one breaker in the panel located by the
> right rear wheel well controls the service to the rear roof air. I don't
> know what the other breaker in that box controls. The rear ac does not
> operate on the service cord when it is plugged into 120V. I am thinking
> that I can operate the rear AC on a power cord plugged into a male
> receptacle on the outside left rear of the coach.
>
> Their is another electrical box in the right rear of the coach that I have
> not idea as to its purpose.
>
> Can someone enlighten me on how the roof ac circuits are suppose to be
> wired? and what position the switches should be in for the front roof air to
> work on the generator?
> --
> John Sharpe
> Humble,TX
> '40 Ford Deluxe TBI
> '78 Eleganza TBI
> '78 Royale TBI
> mailto:johnasharpe@earthlink.net
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: Roof AC wiring circuit on a 78 Royale? [message #91646 is a reply to message #91596] |
Mon, 12 July 2010 12:24 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
Fred wrote: in my '77 rear bath the front air runs on both power sources so did the rear air until i removed it.
Jim wrote: I have a 78 Royale w/side dry bath, two rear beds with a night stand in the
middle. The bottom door opens to expose 120 v breakers. On my coach when
running the Onan, the toggle must be switched to the Gen position and both
the brakers in the pass rear wheel compartment must be on. There are two
breakers in this panel. Then the roof AC will operate. I have a DuoTherm
with a 2 min compressor start relay. Hope this helps. I believe that my
coach is nearly stock in the wiring.
Jim Hupy
Salem, Or
78 Royale 403
On Sun, Jul 11, 2010 at 7:27 PM, John Sharpe <johnasharpe@earthlink.net>wrote:
>
>
> I'm trying to get the front roof air to operate on the generator. The
> front roof air works when the cord in plugged into 120V.
>
> Referring to the panel located in the back between the rear beds--If I run
> the generator and switch the see-saw breaker to turn off the service cord
> and apply the current from the generator to the service panel, there is no
> power to the front roof air. However, the other 110V circuits for the tv,
> converter, and refrigerator do work on the generator. Both the double
> breaker and the ground fault breaker are in the 'on' position. In looking
> at the diagram, the breaker positions are switched in the service panel.
> Don't know if that makes a difference or not.
>
> While the generator is running one breaker in the panel located by the
> right rear wheel well controls the service to the rear roof air. I don't
> know what the other breaker in that box controls. The rear ac does not
> operate on the service cord when it is plugged into 120V. I am thinking
> that I can operate the rear AC on a power cord plugged into a male
> receptacle on the outside left rear of the coach.
>
> Their is another electrical box in the right rear of the coach that I have
> not idea as to its purpose.
>
> Can someone enlighten me on how the roof ac circuits are suppose to be
> wired? and what position the switches should be in for the front roof air to
> work on the generator?
> --
> John Sharpe
|
Don't know what happened to this thread. Doesn't seem to have any objectionable material to me. Anyway, started checking the circuits out and found the the front ac had been wired directly to the shore power cord without any protection. That explains why it only worked on shore power. Now I have to figure out how to protect the circuit and allow it to run on both shore and gen power.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: Roof AC wiring circuit on a 78 Royale? [message #91718 is a reply to message #91646] |
Mon, 12 July 2010 20:39 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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Senior Member |
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| John Sharpe wrote on Mon, 12 July 2010 10:24 |
... started checking the circuits out and found the the front ac had been wired directly to the shore power cord without any protection. That explains why it only worked on shore power. Now I have to figure out how to protect the circuit and allow it to run on both shore and gen power.
|
Sounds like you have P.O. problems.
A Previous Owner most likely couldn't figure out the original Royale (Coachman) wiring setup. Understandable, I haven't been able to figure it out. (As it is different than my Birch I haven't really NEEDED to...) I KNOW it was set up that way for SOME reason. Anyway the PO probably just wanted the AC to run more than he cared about being wired correctly. It was probably was hot or something.
I also recommend you get the wiring diagrams that Fred linked. (I believe they are also on the DVD.) Talk to other Royale owners and figure out what works well and what doesn't and let that guide you on plans for rewiring it. If you are not really good with electricity... ask for someone to look over your plans for safety reasons.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: Roof AC wiring circuit on a 78 Royale? [message #91720 is a reply to message #91590] |
Mon, 12 July 2010 20:45 |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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Senior Member |
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Re running BOTH roof airs at the same time. Unless your coach has the "50" Amp cord, you CANNOT start (even at different times) and run 2 roof airs from even a 30 amp circuit. Most 15,000 BTU A/Cs draw more than 15 amps running, and the starting current is a BIG number. You may need to do a LOT more than just wire up both A/Cs to the same shore power cord if it is not a 50 AMPer.
Dave King
26', 1976 SOB with 1 roof air.
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: Roof AC wiring circuit on a 78 Royale? [message #91732 is a reply to message #91720] |
Mon, 12 July 2010 21:47 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
Re running BOTH roof airs at the same time. Unless your coach has the "50" Amp cord, you CANNOT start (even at different times) and run 2 roof airs from even a 30 amp circuit. Most 15,000 BTU A/Cs draw more than 15 amps running, and the starting current is a BIG number. You may need to do a LOT more than just wire up both A/Cs to the same shore power cord if it is not a 50 AMPer.
Dave King
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Dave, I'm trying to get the ac's to run on the Onan. They both work on shore power. The front one runs with the 30 amp cord and the rear with a separate 20 amp cord.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: [GMCnet] Roof AC wiring circuit on a 78 Royale? [message #91752 is a reply to message #91732] |
Tue, 13 July 2010 00:30 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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John, I forgot to ask. Do you have 1 or 2 roof airs? If you have two the 6KW
Onan will run and start both, but some of them are wired one from the Onan
and one from the shore power. The 30 amp service cord and panel is not large
enough to run both off shore power. You would need a 50 amp plug & cord set
to do that.
Jim Hupy
Salem, Or
78 Royale 403
On Mon, Jul 12, 2010 at 7:47 PM, John Sharpe <johnasharpe@earthlink.net>wrote:
>
>
> Quote:
> > Re running BOTH roof airs at the same time. Unless your coach has the
> "50" Amp cord, you CANNOT start (even at different times) and run 2 roof
> airs from even a 30 amp circuit. Most 15,000 BTU A/Cs draw more than 15 amps
> running, and the starting current is a BIG number. You may need to do a LOT
> more than just wire up both A/Cs to the same shore power cord if it is not a
> 50 AMPer.
> > Dave King
>
>
> Dave, I'm trying to get the ac's to run on the Onan. They both work on
> shore power. The front one runs with the 30 amp cord and the rear with a
> separate 20 amp cord.
> --
> John Sharpe
> Humble,TX
> '40 Ford Deluxe TBI
> '78 Eleganza TBI
> '78 Royale TBI
> mailto:johnasharpe@earthlink.net
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
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List Information and Subscription Options:
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| Re: [GMCnet] Roof AC wiring circuit on a 78 Royale? [message #91757 is a reply to message #91752] |
Tue, 13 July 2010 06:27 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
Jim wrote: ....Do you have 1 or 2 roof airs? If you have two the 6KW
Onan will run and start both, but some of them are wired one from the Onan
and one from the shore power. The 30 amp service cord and panel is not large
enough to run both off shore power. You would need a 50 amp plug & cord set
to do that.
Jim Hupy
|
Jim, My coach is wired for the front roof ac to run on the 30 amp shore power cord and the rear roof ac runs on a separate dedicated 20 amp shore power cord. Since I changed the front ac wiring back to the original location on the 30 amp service panel, they now both run off the 6KW Onan.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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