charging a carrier heatpump

[honest dave]

i went to check out the charge on the unit for a friend of mine. the unit seems to run ok but the charging graf only refers to cooling only mode. i could check the charge easy enough in summer time evan without the graf but where iam located heatpums arent very commoning. is there any technical procedure or should i try to see if carrier has a winter mode charging graf .

[honest dave]

Originally posted by honest dave
i went to check out the charge on the unit for a friend of mine. the unit seems to run ok but the charging graf only refers to cooling only mode. i could check the charge easy enough in summer time evan without the graf but where iam located heatpums arent very commoning. is there any technical procedure or should i try to see if carrier has a winter mode charging graf .

[brettln]

There are numorous professional that wont even attempt to charge a system, especially a heat pump, during cold weather. Meaning below 50 degrees. Their reasoning for that is it is important to get proper gauge readings on heat pumps, and of course weather plays effect with your readings. They also mentioned that moisture will find its way into your system easier with extreme cold weather.

Dont charge unless it is absolutly unavoidable. You did say the system was operating fine.

[honest dave]

yes the system was running ok but the owner wanted to know for sure if the charge was up to specs. i will have to wait for warmer weather. also i mentioned to the owner i wouldnt bother running the heatpump when the temp is below 32 degrees . to me its a waste of electric . the heatpumps mechanically doesnt work to good anyway .he is better off running his backup resistance heaters and save putting hours on the compressor. 32 and obove is ok .

[vet]

I have a book that says how to check it out with eleven different charts that will let you pin point any problems, but they say you will have to recover all refrig and then weigh it back in.
BRETTIN is right dont try it unless it isnt heating waite for a warmer day. I live in Houston and after 28 years Ive only worked on about 3 residetial systems and 3 or four bigger commercial systems, we dont have that many here either.