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Old 11-23-2017, 04:33 AM   #1
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2017 28' Flying Cloud
Tulsa , Oklahoma
Join Date: May 2017
Posts: 3
Using the heat pump on 110

We have an AS 28A 50amp with 2 Dometic A/C units equipped with heat pumps. Does anyone know if you can run the heat pumps on 110 without damaging the units?


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Old 11-23-2017, 06:13 AM   #2
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2009 27' FB Flying Cloud
1991 35' Airstream 350
Jay , Oklahoma
Join Date: Oct 2006
Posts: 1,688
The entire trailer is designing to only operate on 110 (or more correctly 120) volts.

If you are plugged into a 30 amp RV circuit, run only 1 unit at a time.

50 amp RV electric supplies confuse most electricians. The circuit is capable of supplying 240 volts, but the trailer is wired to use each 120 volt leg of the supply separately.

The heat pumps are nice to use, but will only produce heat when outdoor temps are 35 degrees or above.



Jeff & Cindy
'09 27FB Flying Cloud
'91 350 LE MH
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Old 11-23-2017, 06:37 AM   #3
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2014 27' FB Eddie Bauer
Chelsea , Michigan
Join Date: May 2010
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The previous post is correct. However, I am going to guess that you were asking about running the heat pump while on a 15 amp circuit (i.e., a typical household plug.) The answer is no for a stock AC unit. Using the heat pump runs the same compressor and mechanical components that are used to cool the air into your trailer. Except that in heat pump mode the unit is used to make warm air rather than cold air. It will draw the same basic amount of power to run itself as it does in air conditioning (or cold) mode. You might be successful in getting the unit to start up and run on a 15 amp circuit but you will be damaging it as you do so. The damage might not show up right away, but one day down the road your compressor will fail and you'll wonder why.

There is an aftermarket device called a MicroAir Easy Start which can be installed in your AC unit to allow it to start and run on a 15 amp circuit or 2000 watt generator. I've included a link below.
Bob Martel
WBCCI# 5766
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