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Old 01-16-2014, 10:23 AM   #1
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Adding 2nd AC unit

I have a 2007 Silverback 30LSTS with 50 amp service. I'd like to add a 2nd AC unit. Since it is 50 amp service is it safe to assume it is pre-wired for the 2nd unit? Where would the thermostat wiring be? Any tips for adding a 2nd unit?

Thanks!
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Old 01-16-2014, 10:28 AM   #2
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It is never safe to assume anything when it comes to RV construction.
Does the thermostat control more than one zone?
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Old 01-16-2014, 10:29 AM   #3
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Quote:
Originally Posted by HD64 View Post
I have a 2007 Silverback 30LSTS with 50 amp service. I'd like to add a 2nd AC unit. Since it is 50 amp service is it safe to assume it is pre-wired for the 2nd unit? Where would the thermostat wiring be? Any tips for adding a 2nd unit?

Thanks!
It's most likely wired for the 2nd AC and the wires are stubbed into the roof vent area. As for thermostat, it may or may not have a connection. Many just use the ceiling control panel in place of thermostat. The hardest part of installing an AC is getting it on the roof.
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Old 01-16-2014, 10:32 AM   #4
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The existing thermostat only controls the existing ac. In my brother's 2013 silverback the 2nd ac is on it's own separate theromostat.
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Old 01-16-2014, 04:41 PM   #5
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Quote:
Originally Posted by HD64 View Post
I have a 2007 Silverback 30LSTS with 50 amp service. I'd like to add a 2nd AC unit. Since it is 50 amp service is it safe to assume it is pre-wired for the 2nd unit? Where would the thermostat wiring be? Any tips for adding a 2nd unit?

Thanks!
You should easily find the wires for the bdrm AC
when you remove the garnish ring from the existing
vent. Most likely 2 sets of wires. One pair of 12v for a
fan and one 110v NM cable (should be 12-2 w/ground).
As for the thermostat, it must be compatible with
the control box of your new unit. The AC installation
instructions/manual should give you that info. If you can
fish a wire to an interior bulkhead that would be beneficial.
I agree with the post about getting it up on the roof. I used
Bubba standing on a truck cap to heave ho it up. Had an old thick
comforter up there to protect the EPDM.
Good luck with your install.
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Old 01-16-2014, 04:58 PM   #6
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On my 2010 Sandpiper, there was actually a 2x4 single gang electrical box with a blank plate over it located about 4" from the vent/garnish ring. All I had to do was push them thru the ceiling cavity into the vent cutout, when I installed the 2nd AC.
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Old 01-16-2014, 05:30 PM   #7
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Thanks to all for your responses and excellent advise. Very helpful...
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