Busskipper wrote:
pianotuna wrote:
May I ask for a link to your make and model? Thanks in advance.
rgatijnet1 wrote:
As far as the brand of mine. It is an Spt but all single and double hose portable heat pump/AC units work the same way, except a double hose unit uses outside air.
My heat pump, with the single hose draws ambient air from the RV cabin. Some of that air is passed over the condensing coil, heated, and blown back out in to the RV.
http://site.sunpentown.com/WA-9061H.1061H_manual.pdf
HEAT mode
1. When HEAT mode is selected, the ambient warm air will be recycled and utilized to heat the
area where it is required. The Exhaust Pipe must be fitted properly to exhaust the cold
air outdoors.
2. Continuous drain is mandatory when unit operates in heat mode.
3. The working temperature range for heating function is 45~77°F/7~25°C. If ambient
temperature is outside this range, the unit may not work properly.
Might be it.
That sounds about right and since the ambient air is the inside of the RV, it works fine. As I mentioned, the RV has to be above 45 degrees inside for it to work right and I guessed around 95 as a max but apparently it is 77 interior temp as the max. We keep it running at about 65 degrees.