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02-02-2019, 11:21 PM
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#1
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Senior Member
Join Date: Jun 2018
Location: Los Angeles area
Posts: 1,416
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Air conditioning power switches?
The photo below shows a pair of switches that are located inside a cabinet in my 1985 Fleetwood Southwind.
Does anybody know how they are wired?
And I'm looking for any 120 volt AC and 12 volt DC wiring diagrams for my Fleetwood. I have the Chevy P30 wiring diagrams, I'm looking for anything that Fleetwood would have added or changed.
__________________
Semi-retired technogeek...electronics / computer / 2-way / ham radio... WA6ILQ (45+years)
1985 Fleetwood 32' Southwind (Chev P30/454/TH400), dubbed "Lazarus" by friends... I resurrected it from the dead...
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02-03-2019, 02:37 AM
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#2
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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I see two problems here. The diagram pictures show both off or both on. To have only front or only rear you would need the switches in oppset positions. Also in the photo the switches are installed upside down. 
Seems to me they are just on and off switches. one for each unit.
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2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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02-03-2019, 04:16 AM
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#3
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Senior Member
Join Date: Oct 2012
Location: Foley AL
Posts: 7,138
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Quote:
Originally Posted by cavie
I see two problems here. The diagram pictures show both off or both on. To have only front or only rear you would need the switches in oppset positions. Also in the photo the switches are installed upside down.
Seems to me they are just on and off switches. one for each unit. |
Enlarging the picture . switch on left labeled "NO" and switch on right labeled "ON". Assume they are wired so that when both are up, one is off and the other is on .... and vice-versa when down. Not sure what the wiring may look like to discriminate shore power from generator.
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2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
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02-03-2019, 04:45 AM
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#4
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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Quote:
Originally Posted by bruceisla
Enlarging the picture . switch on left labeled "NO" and switch on right labeled "ON". Assume they are wired so that when both are up, one is off and the other is on .... and vice-versa when down. Not sure what the wiring may look like to discriminate shore power from generator.
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AnotherMike has opened up a can off worms here.
You are correct but that just makes things worse. A switch that is marked must say on or off per the NEC. On shall be in the up position of the handle. Off in down.
The diagram says both handles up you can run both units. Both switch must say the same. How does the both handles in the up position do two different functions depending on the power source
Does the Generator supply more power then the shore power?
I would love to open that up and study it.
Of course I'm easily confused being just a dumb electrician trying to figure out the RV world.! LOL
__________________
2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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02-03-2019, 05:33 AM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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Could they both be double throw switches ?
A cheap way if building a double pole double throw switch ?
A 30 amp couch has 1 incoming line that can only run 1 air conditioner, but the generator will have 2 lines. One for the house loads and the second dedicated to 1 air conditioner.
My 30 amp MH with a 5500 watt generator had a 30 and 15 amp breaker on it. I didn't have a second AC so the 15 amp line did nothing.
It could be that there is one SPST and one SPDT.
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02-03-2019, 11:41 PM
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#6
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Senior Member
Join Date: Jun 2018
Location: Los Angeles area
Posts: 1,416
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Thanks for all the replies.
The RV has a 30 amp shore power system, the generator is an Onan 6.5kw, spec'd at 120vAC 37 amps.
I'm not going to be able to pull the cover plate and the switches and draw a diagram until the weekend - but now that is on the top of my list.
Anything else I should be doing or looking for while I am there?
Mike
__________________
Semi-retired technogeek...electronics / computer / 2-way / ham radio... WA6ILQ (45+years)
1985 Fleetwood 32' Southwind (Chev P30/454/TH400), dubbed "Lazarus" by friends... I resurrected it from the dead...
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02-04-2019, 05:19 AM
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#7
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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Why take it apart, if it works, follow the instructions and use it.
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02-04-2019, 06:55 PM
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#8
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Senior Member
Join Date: Jun 2018
Location: Los Angeles area
Posts: 1,416
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Quote:
Originally Posted by twinboat
Why take it apart, if it works, follow the instructions and use it.
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It looks like I left out a critical bit of info...
The coach can't tell if its genny or shore power... The way this coach is built/wired there is a manual transfer switch: to run the coach on the generator you plug the shore power cable into a TT30 female connector that is hooked to the generator.
This fact made me wonder as to the wiring... as the label under the switches says you can run both air conditioner units on the generator, or one on shore power.
There have to be a number of Fleetwoods still in use... Maybe another owner could share what these switches actually do... how they are wired...
Maybe someone has a Fleetwood AC wiring diagram in their collection, or maybe has been down this road and already reverse engineered the AC wiring.
Mike
__________________
Semi-retired technogeek...electronics / computer / 2-way / ham radio... WA6ILQ (45+years)
1985 Fleetwood 32' Southwind (Chev P30/454/TH400), dubbed "Lazarus" by friends... I resurrected it from the dead...
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02-04-2019, 07:31 PM
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#9
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Senior Member
Join Date: Mar 2013
Posts: 492
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Air conditioning power switches?
The generator will have 2 circuits . One is wired to the 30 amp female outlet.The other is wired by an automatic transfer switch straight to the second air conditioner.
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02-04-2019, 07:36 PM
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#10
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Senior Member
Join Date: Aug 2015
Location: Where I park
Posts: 294
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The one on the left would scare me, doesn’t no mean no?
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02-04-2019, 07:58 PM
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#11
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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With that double switch arrangement, there will be no automatic transfer switch to the second air. It will go to one of the switchs.
Make sure both breakers on the generator are on. The air that runs on the generator should run without the shore cord plugged in and the switchs are up.
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02-04-2019, 08:00 PM
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#12
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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Quote:
Originally Posted by GBDTN
The one on the left would scare me, doesn’t no mean no?
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The switch is installed upside down. NO = ON.
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