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Old 11-16-2019, 01:53 PM   #1
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Dual AC, dual thermostats?

We traded our 2007 cougar 5th wheel in on a 2015 Rockwood 5'th wheel.

We have never owned a camper of any type with dual AC's before.

This may be a stupid question but what is the purpose of having 2 controls, one the old fashion one and a digital one?




Our old camper had the one just like the bottom one that I quickly replaced with a digital house one.


Thanks
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Old 11-16-2019, 09:11 PM   #2
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You will have a single “dual zone” thermostat, or most likely 2 single thermostats, one in the bedroom, and one in the living room
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Old 11-16-2019, 10:51 PM   #3
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We have two dual ACs the rear thermostat in our bedroom runs the air-conditioning only and the one in the hallway runs the air-conditioning in front of the coach and the propane heating system. And by the way we insulated both ACs on the roof with half-inch thick insulation drop the temperature about 3 to 4° wrapped AC inlet pipes painted the cowlings covered for AC white, instead of black not sure what color yours are for obvious reasons.
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Old 11-16-2019, 10:55 PM   #4
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The only reason that I can surmise that you have a digital thermostat along with the old style slide thermostat is that the digital one is a replacement. Also looking at your photos, the one you have for heat is the analog so I presume that's original. And then to answer your question about why two, in some situations depending on the size of your AC units and the quality of the electrical service, running them both on a 30 amp (or lesser) pedestal might be problematic as far as the load is concerned. So you can still cool your unit to some extent running one air conditioner on a 30 amp service, whereas if you tried to run both on that 30 amp service, you might be tripping breakers.
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Old 11-17-2019, 04:04 AM   #5
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My coach has 2 a/c units on a 30 amp service with 2 thermostats. The thermostat for the front unit controls the a/c and propane furnace, the rear controls the bedroom furnace. The load controller will not let both start at the same time. No issues with both running once started at the same time, only draw around 15 amps with both running. Both of the a/c units are Coleman Power Saver units and draw much less starting and running amps that probably all of the other units on the market.
The a/c units discharge in the ceiling ducts and unless it is really hot we seldom run the bedroom unit.
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Old 11-17-2019, 07:26 AM   #6
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I Know on my setup
If the ac's were wired together my primary thermostat would anticipate start up of the second ac.
However my MFG wired them separately so I set the temperature 2° apart.
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