Charging HPs

[dttx2222]

Anybody has an easy chart to for charging hp in a heat mode.

[iwannahelp]

I always look on the unit's panel or in the service literature unless it is one of those special situations where the panel has jack squat wrote on it and the service lit. is missing. In that case......good luck and use your best judgement.

[dw1]

The only way to accurately charge a hp in heat mode is to recovery the existing charge and weight in the correct charge including any additional refrigerant for lines sets over 15 feet.
The problem with charging by pressure in heat mode is that damned accumulator, you cannot tell how much refrigerant is in there. When you weight in the charge you don't have to worry about it.

[HVAC Pro]

I agree. Charge by weight in the heat mode. Anything else is a guess and subject to many variables. For routine maintenance, use the check chart to see if you are in the ball park.