Fixed Orifice or TXV When Charging.
Which is the proper way to charge a Heat Pump when the condenser is a fixed orifice but there is a TXV at the evaporator. There is a chart for charging that looks like this.
So is the system being charged by super heat or sub cooling? Last pressures were 70 on the low side and 175 on the high side. Supply air is 61 degrees on a 75 degree day. Is this the best I will ever see?
There is good air flow now at the return and supply. I just was hoping for a lower supply air temp.
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Good air flow at registers doesn't tell CFM.
Even with a proper charge, temp delta can be poor if the air flow is too much.