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Old 12-02-2015, 07:38 AM   #1
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Heat pump?

We have 04 Dolphin LX. I noticed on the thermostat a position for "electric heat"; I have reviewed all the literature that came with this MH and can not find information on this. Is this a "heat pump" type operation and if so, at what temperature range will this unit operate? Thanks
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Old 12-02-2015, 07:52 AM   #2
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Quote:
Originally Posted by morris44 View Post
We have 04 Dolphin LX. I noticed on the thermostat a position for "electric heat"; I have reviewed all the literature that came with this MH and can not find information on this. Is this a "heat pump" type operation and if so, at what temperature range will this unit operate? Thanks

If it just states "Electric Heat" instead of "Heat Pump" on your thermostat, I think you'll find that you have electric resistance heating, or heat strips. If that is correct, there is no real limit on the lower ambient temp that the heat will work in.
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Old 12-03-2015, 12:26 AM   #3
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Do you have a basement ac or roof units? Basement will be heat pump and roof generally will be heat strip.
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Old 12-03-2015, 06:41 AM   #4
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Basement unit
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Old 12-03-2015, 08:33 AM   #5
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If you have the make and model of the ac, you should e able to find and download a manual for it.

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Old 12-03-2015, 10:05 AM   #6
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Basement should be a heat pump and above 40 work ok, we don't use it often as it is noisey especially when sleeping. We do use it in the morning as the ducts run through the ceiling and it blows cold first but once it heats up the ducts the coach seems to stay warmer.
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Old 12-03-2015, 11:40 AM   #7
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The basement unit is a little hard to understand at first. The unit is a heat pump so it will heat and cool the MH. If you place the thermostat in elec. heat and the temperature difference is more than, (I think its 4 or 6 degrees) the gas furnace will come on first, then switch over to the heat pump. After that the heat pump should be the only unit that operates to maintain temp inside the MH. One other thing, the heat pump doesn't heat well when the outside temp is below 45F
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Old 12-03-2015, 05:12 PM   #8
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Belgain is correct. If the room temperature is within 4 degrees of the thermostat setting, the heat pump will start , if more than 4 degrees the gas furnace will start.
To save on propane, I will set the thermostat 3 or 4 degrees above room temperature to make the heat pump start and run, then gradually keep moving the thermostat up while still keeping it within 4 degrees of room temperature till the RV is warmed up. That is with the thermostat switch in the electric heat pump position. Note: there is a switch in the driver's side rear storage bay that sets to heat pump/AC to run on either 30 Amp or 50 Amp shore power. It turns off one of the 2 compressors. If on 30 Amp mode it will not heat, or cool, as quickly. If your generator is the 7000 watt model, the heat pump switch should be put in the 50 Amp position.
We find the heat pump heats the entire RV up faster than the furnace, unless it is cooler than 40 F. to 45 F. outside.
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Old 12-03-2015, 05:42 PM   #9
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A basic home or RV single stage air to air exchange heat pump will produce less heat output in heating mode as the outside temperature drops, generally at 40 to 45 F outside temperature your home or coach will need more heat than can be produced by the Basic Heat Pump.

In a home or RV basic heat pump situation, once the digital thermostat sees temp drop 2 degrees below the set point the thermostat will also call for secondary heat and that will begin to supplement the heat pump generated heat output to keep up with the thermostat setting. In a RV without aqua hot diesel fueled floor heat the secondary heat is your propane furnace.

Personally, if it gets below about 40 F I put the thermostat on propane only mode and supplement with a single 1400 watt thermostat controlled electric heater.
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Old 12-04-2015, 06:53 AM   #10
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I knew there was a good reason to join IRV2; it's all the wonderful people that are willing to share information and knowledge to help a fellow RV'er. THANKS and an early Merry Christmas Greeting to All.
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