Hayward HCB110BTA, Troubleshooting Manual

Page: 7 / 34

Normal Operation of Heat Pump
All of the heat pumps covered in this guide are charged with R-410A refrigerant
If you have a system that is charged with R-22 refrigerant, and require assistance
call our Technical Support Department at 908-355-7995
Normal Refrigerant Operating Pressures
Low side 125-135psi
Lower ambient temperatures will result in lower low side (suction) pressures.
High Side 290-400psi
Higher water temperatures will result in higher high side (discharge) pressures
.
Normal Air Temperature Differential
This is the difference in the temperature of the air entering the coil (ambient air),
and the air being discharged out the top by the fan.
15-20 degrees Fahrenheit
Low relative humidity and/or lower than normal ambient temperatures can cause
lower than normal temperature differentials.
Note: This is the best way to determine if a heat pump is heating