Basement Air Question

My floor heat comes on when the basement air temp thermostat is set higher than 3 degrees of the interior motor home. The heat pump must be increased slowly by 3 degree increments. On the other hand it has a real problem working at all when it is super cold outside.

This is from memory as I haven't read the manual in a while. I think the heat pump will attempt to reach set point in ten minutes if it is within 5 degrees of room temp. Over the time or temp limit and the furnace will kick on "to assist". If after another ten minutes and fail to reach set point it will shut down. Remember the heat pump function will not function if the outside (inlet) air is in the forty degree range.

Click this link for an explanation of YOUR system. Doug

http://old.rvcomfort.com/rvp/pdf_documents/t_stat_electric_heat_function.pdf

Thanks guys. It makes sense. When thinking about it, I think the furnace kicks on when I turn it up too quickly. Must be in the design to get the interior up to temperature more rapidly than the heat pumps can bring it up.

I have a space heater, but it won't keep the entire interior warm when it's down below freezing and I can't run the heat pump and the space heater at the same time with only 30-amp service.

Tom

Tom

My 2000 Fleetwood southwind has an extra vent on the furnace that outlets into the basement. So the furnace heats both upper and lower with no way to control them individually. I am installing a flap valve to turn off the basement heat.

From My memory of my Winnebago ,Its on propane if its out of the floor! You will also notice a big clue is your furnace burner on if you stand outside by the furnace burner exhaust . It will automatically come on if the inside temp difference is too great or the heat pumps cant provide enough heat When on the heat pump setting. Normally that happens as I said , if its too cold outside for the heat pumps to heat properly (40deg outside or lower), Or as I said youve set it for 70 and the temp inside is 50 the furnace will come on also as the heat pumps cant raise the temp that fast. The furnace will shut off as soon as the heat pump can keep up.
If you want just elect heat use some small aux heaters The pump will default to furnace backup. Heat pumps (reverse air conditioning ) will not work in cold temp!