Home » Public Forums » GMCnet » [GMCnet] Coachmen Transfer Switch
| [GMCnet] Coachmen Transfer Switch [message #132421] |
Tue, 28 June 2011 06:02  |
bdub
Messages: 1578
Registered: February 2004
Location: Central Texas
Karma: 5
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I believe Coachmen finished coaches come standard with a transfer switch so
that one does not have to plug in the shore power cord to a receptacle in
the motorhome.
Do any of you Royale and Birchaven owners have any replacement information
for this switch? Reason for asking, I have a parts number submission from
another person but want to double check so I don't put an erroneous number
in the parts interchange.
Any help? Thanks in advance.
bdub
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bdub
'76 Palm Beach/Central Texas
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| Re: [GMCnet] Coachmen Transfer Switch [message #132425 is a reply to message #132424] |
Tue, 28 June 2011 06:59  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
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[QUOTE....I believe Coachmen finished coaches come standard with a transfer switch so
that one does not have to plug in the shore power cord to a receptacle in
the motorhome.
Do any of you Royale and Birchaven owners have any replacement information
for this switch? Reason for asking, I have a parts number submission from
another person but want to double check so I don't put an erroneous number
in the parts interchange....][/QUOTE]
Billy, My early '78 had a see-saw mechanism on two breakers. One had to be 'OFF' in order to turn the other one 'ON'. There was no special dedicated switch.
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] Coachmen Transfer Switch [message #132431 is a reply to message #132429] |
Tue, 28 June 2011 08:10 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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My 78 Royale has an auto transfer switch, not sure if it was put in by a PO or by Coachmen. I will send info on it.
Sent via BlackBerry by AT&T
-----Original Message-----
From: Billy Massey <bdub@bdub.net>
Sender: gmclist-bounces@temp.gmcnet.org
Date: Tue, 28 Jun 2011 07:58:25
To: <gmclist@temp.gmcnet.org>
Reply-To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Coachmen Transfer Switch
Ok, so it's not automatic but manually thrown. Is it true that there
is no cord to unplug from shore power and plug back in to the onboard
receptacle as it is on my '76 Palm Beach? In other words, if shore
power fails are you able to crank the generator and then select that
power source with the switch?
If so, what is that switch?
Are they all the same?
What is it's replacement if (when) it fails?
Thanks for the education. Just want to get it right.
bdub
On Tue, Jun 28, 2011 at 6:02 AM, Billy Massey <bdub@bdub.net> wrote:
> I believe Coachmen finished coaches come standard with a transfer switch so
> that one does not have to plug in the shore power cord to a receptacle in
> the motorhome.
>
> Do any of you Royale and Birchaven owners have any replacement information
> for this switch? Reason for asking, I have a parts number submission from
> another person but want to double check so I don't put an erroneous number
> in the parts interchange.
>
>
>
> Any help? Thanks in advance.
>
> bdub
>
>_______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Coachmen Transfer Switch [message #132444 is a reply to message #132421] |
Tue, 28 June 2011 10:34 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Billy,
Just so no one mistakenly thinks you're stipulating automatic switching:
I don't think any Coachmen came with automatic transfer switches. The
diagrams I have, and coach, I've seen have a dual main circuit
breaker. One of the breakers connects shore power to the rest of the
breaker box, the other one of the pair connects the generator.
There's a rocker between the two breaker levers which allows only one
of them to be closed at a time. It's simple and effective, but means
one must go to the breaker panel during each power change and "flip
the switch".
But, that arrangement makes it very easy to install an automatic
switch because all of the necessary wires are right there together.
In fact, I just installed the relay in the CB box -- but mine's not
original.
A little more research: I don't remember disassembling one of the
dual breakers; the interlock may be a separate device which can be
used with more common breakers. Square D offers such a device, the
QO2DT1 on this page:
http://ecatalog.squared.com/pubs/Circuit%20Protection/Miniature%20Circuit%20Breakers/QO-QOB%20Circuit%20Breakers/0730CT9801R108.pdf
http://goo.gl/bf5RR
With that one should be able to devise a replacement. I was never
able to find an integrated device like in the Coachmen.
If I had a Coachmen and the main breakers failed, I'd definitely
replace them with a single relay and a transfer relay. It's just a
30A DPDT 110VDC relay with a diode feeding a capacitor across the
coil; this diagram shows two of them connected for inverter control
also:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=8542&cat=3484
http://goo.gl/bPvyX
How'd I get into all that???
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Tue, Jun 28, 2011 at 7:02 AM, Billy Massey wrote:
> I believe Coachmen finished coaches come standard with a transfer switch so
> that one does not have to plug in the shore power cord to a receptacle in
> the motorhome.
>
> Do any of you Royale and Birchaven owners have any replacement information
> for this switch? Reason for asking, I have a parts number submission from
> another person but want to double check so I don't put an erroneous number
> in the parts interchange.
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Coachmen Transfer Switch [message #132446 is a reply to message #132429] |
Tue, 28 June 2011 10:39 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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I'll have to take a look at the setup in my coach. Don't quote me, but I believe I could do exactly as you say and fire up the Onan if shore power failed without unplugging anything. In other words I don't think the tips of my power cord are hot when the Onan is on.
Larry Davick
Sent from my iPad
On Jun 28, 2011, at 5:58 AM, Billy Massey <bdub@bdub.net> wrote:
> Ok, so it's not automatic but manually thrown. Is it true that there
> is no cord to unplug from shore power and plug back in to the onboard
> receptacle as it is on my '76 Palm Beach? In other words, if shore
> power fails are you able to crank the generator and then select that
> power source with the switch?
> If so, what is that switch?
> Are they all the same?
> What is it's replacement if (when) it fails?
> Thanks for the education. Just want to get it right.
> bdub
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Coachmen Transfer Switch [message #132447 is a reply to message #132446] |
Tue, 28 June 2011 10:46 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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One of my PO's installed an auto transfer switch, works great, never have to touch a thing when I start the Onan. I have info if anyone needs it.
Sent via BlackBerry by AT&T
-----Original Message-----
From: Larry Davick <ljdavick@comcast.net>
Sender: gmclist-bounces@temp.gmcnet.org
Date: Tue, 28 Jun 2011 08:39:37
To: gmclist@temp.gmcnet.org<gmclist@temp.gmcnet.org>
Reply-To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Coachmen Transfer Switch
I'll have to take a look at the setup in my coach. Don't quote me, but I believe I could do exactly as you say and fire up the Onan if shore power failed without unplugging anything. In other words I don't think the tips of my power cord are hot when the Onan is on.
Larry Davick
Sent from my iPad
On Jun 28, 2011, at 5:58 AM, Billy Massey <bdub@bdub.net> wrote:
> Ok, so it's not automatic but manually thrown. Is it true that there
> is no cord to unplug from shore power and plug back in to the onboard
> receptacle as it is on my '76 Palm Beach? In other words, if shore
> power fails are you able to crank the generator and then select that
> power source with the switch?
> If so, what is that switch?
> Are they all the same?
> What is it's replacement if (when) it fails?
> Thanks for the education. Just want to get it right.
> bdub
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Coachmen Transfer Switch [message #132461 is a reply to message #132421] |
Tue, 28 June 2011 12:30 |
sgltrac
Messages: 2797
Registered: April 2011
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Mine will auto transfer between shore and onan. While getting shore power with onan running,no load on onan. When onan running and shore power is unplugged, onan loads and takes over
Sully
77royale
------Original Message------
From: Billy Massey
Sender: gmclist-bounces@temp.gmcnet.org
To: gmclist@temp.gmcnet.org
ReplyTo: gmclist@temp.gmcnet.org
Subject: [GMCnet] Coachmen Transfer Switch
Sent: Jun 28, 2011 4:02 AM
I believe Coachmen finished coaches come standard with a transfer switch so
that one does not have to plug in the shore power cord to a receptacle in
the motorhome.
Do any of you Royale and Birchaven owners have any replacement information
for this switch? Reason for asking, I have a parts number submission from
another person but want to double check so I don't put an erroneous number
in the parts interchange.
Any help? Thanks in advance.
bdub
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Sent from my Verizon Wireless BlackBerry
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Coachmen Transfer Switch [message #132472 is a reply to message #132429] |
Tue, 28 June 2011 13:45 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Mine has a shore/genset switch under the sink (rear dry bath) and a 'battery' switch under the kitchen sink right by the inverter. 23' 76 transmode, upfitted by Norris before Coachmen bought them.
--johnny
--- On Tue, 6/28/11, Billy Massey <bdub@bdub.net> wrote:
From: Billy Massey <bdub@bdub.net>
Subject: Re: [GMCnet] Coachmen Transfer Switch
To: gmclist@temp.gmcnet.org
Date: Tuesday, June 28, 2011, 12:58 PM
Ok, so it's not automatic but manually thrown. Is it true that there
is no cord to unplug from shore power and plug back in to the onboard
receptacle as it is on my '76 Palm Beach? In other words, if shore
power fails are you able to crank the generator and then select that
power source with the switch?
If so, what is that switch?
Are they all the same?
What is it's replacement if (when) it fails?
Thanks for the education. Just want to get it right.
bdub
On Tue, Jun 28, 2011 at 6:02 AM, Billy Massey <bdub@bdub.net> wrote:
> I believe Coachmen finished coaches come standard with a transfer switch so
> that one does not have to plug in the shore power cord to a receptacle in
> the motorhome.
>
> Do any of you Royale and Birchaven owners have any replacement information
> for this switch? Reason for asking, I have a parts number submission from
> another person but want to double check so I don't put an erroneous number
> in the parts interchange.
>
>
>
> Any help? Thanks in advance.
>
> bdub
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Coachmen Transfer Switch [message #132482 is a reply to message #132472] |
Tue, 28 June 2011 17:20 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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[QUOTE]Ok, so it's not automatic but manually thrown. Is it true that there
is no cord to unplug from shore power and plug back in to the onboard
receptacle as it is on my '76 Palm Beach?Correct, no receptacle to plug the cord into.
In other words, if shore power fails are you able to crank the generator and then select that
power source with the switch?YES
If so, what is that switch?It's the 2 breakers in the rear breaker box as Ken described with the rocker assembly. I believe they are standard breakers
Are they all the same?Yes I believe both breakers are the same
What is it's replacement if (when) it fails?A new breaker that no-one has described yet. Come on guys take a look. Ken, Stick's coach has this set-up. Most of the responses have been from those who have upgraded with an auto transfer relay set-up
Thanks for the education. Just want to get it right.
bdub
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] Coachmen Transfer Switch [message #132488 is a reply to message #132461] |
Tue, 28 June 2011 17:43 |
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Not so with the Coachman I had. You either plugged into the socket for the
Onan or into the socket for shore power. Not modern at all.
Byron Songer
Louisville, KY
Eastern States - http://www.gmceast.com
sgltrac@gmail.com wrote:
> Mine will auto transfer between shore and onan. While getting shore power with
> onan running,no load on onan. When onan running and shore power is unplugged,
> onan loads and takes over
>
> Sully
> 77royale
> ------Original Message------
> From: Billy Massey
> Sender: gmclist-bounces@temp.gmcnet.org
> To: gmclist@temp.gmcnet.org
> ReplyTo: gmclist@temp.gmcnet.org
> Subject: [GMCnet] Coachmen Transfer Switch
> Sent: Jun 28, 2011 4:02 AM
>
> I believe Coachmen finished coaches come standard with a transfer switch so
> that one does not have to plug in the shore power cord to a receptacle in
> the motorhome.
>
> Do any of you Royale and Birchaven owners have any replacement information
> for this switch? Reason for asking, I have a parts number submission from
> another person but want to double check so I don't put an erroneous number
> in the parts interchange.
>
>
>
> Any help? Thanks in advance.
>
> bdub
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
> Sent from my Verizon Wireless BlackBerry
> _______________________________________________
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--
Byron Songer
Full-timing to enjoy the USA
Former owner but still an admirer
GMC paint schemes at -
http://www.songerconsulting.net
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| Re: [GMCnet] Coachmen Transfer Switch [message #132489 is a reply to message #132482] |
Tue, 28 June 2011 17:44 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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John,
I've been pretty much immobile for a couple of weeks and am still not
up to looking a Stick's coach. I do know that it still has the rocker
breakers, but doesn't it have an automatic transfer switch also?
Ken H.
On Tue, Jun 28, 2011 at 6:20 PM, John Sharpe <johnasharpe@earthlink.net> wrote:
...
> What is it's replacement if (when) it fails?A new breaker that no-one has described yet. Come on guys take a look. Ken, Stick's coach has this set-up. Most of the responses have been from those who have upgraded with an auto transfer relay set-up
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Coachmen Transfer Switch [message #132497 is a reply to message #132491] |
Tue, 28 June 2011 18:40 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Ken,
"We" discussed this on the GMCnet yonks back and came to the conclusion that
because the Dometic two way absorption fridge, and the PD 60 amp
converter/charger were plugged into the house power points and the inverter
couldn't supply enough wattage to power them along with the Microwave I had
two options.
a) Turn the fridge to gas, turn off the PD 60, and anything else plugged
into the power points before I fired up the microwave
b) Install a second auto-transfer switch
I decided to go with the 30amp auto-transfer switch as it was only $50.
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Wednesday, 29 June 2011 8:46 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Coachmen Transfer Switch
Huh? WHY?
Ken H.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Coachmen Transfer Switch [message #132499 is a reply to message #132497] |
Tue, 28 June 2011 18:57 |
stick miller
Messages: 1036
Registered: March 2010
Location: Americus, Georgia
Karma: 0
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Senior Member |
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I do still have the rocker switch and will be glad to post a picture if needed. Not any trouble trouble to switch back and forth but I can't remember which is which - even though they are clearly marked ala Ken Henderson and the label maker. I have to use a flashlight although there is no way to mess it up.
Stick Miller
'78 Royale - "White Trash" - she left me for another man
'76 Eleganza - "Cousin Eddie" Sold
'84 Bluebird Wanderlodge - "Past Tents"
Americus, GA
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| Re: [GMCnet] Coachmen Transfer Switch [message #132508 is a reply to message #132497] |
Tue, 28 June 2011 19:47 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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I've forgotten the discussion so I'll just have to trust you to have
done what you wanted to do without my approval. :-)
Ken H.
On Tue, Jun 28, 2011 at 7:40 PM, Rob Mueller wrote:
> Ken,
>
> "We" discussed this on the GMCnet yonks back and came to the conclusion ...
> I decided to go with the 30amp auto-transfer switch as it was only $50.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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