York Heat Pump PHE4A3634B

WARNING: Prior to any of the following maintenance procedures, shut off all power to the unit, to avoid personal injury

Periodic maintenance consists of changing or cleaning filters and general cleaning of the outdoor coil

Replace disposable filters or clean permanent filters as necessary

Note: Do not replace permanent filters with disposable filters

Sign off on the filter inspection

Measure the supply air static pressure

Measure the return air static pressure

Sign off on the external static pressure check

To check or adjust the unit charge, follow these steps:

Connect a temperature probe to the compressor discharge line approximately 6 in. away from the compressor shell

Connect a high side refrigerant pressure gauge to the unit discharge pressure port

Record the discharge line temperature

Using an R-410A temperature pressure chart, convert the gauge pressure to saturation temperature

The difference between discharge saturation temperature and discharge line temperature is discharge superheat

Obtain an entering indoor wet bulb temperature reading

1. Check the electrical supply voltage being supplied

Ensure that it is within the specified range stated on the unit data plate

2. Make sure all electrical connections are tight

3. If the unit is connected to 208 V supply power, wire the control transformer accordingly

4. Turn on the electrical power to the unit

5. Set the room thermostat to the cool position and set the temperature setting on the thermostat lower than the room temperature to create a call for cooling

6. Measure the total external static pressure and set the blower motor cooling speed appropriately according to Table 13

7. If an optional electric heat kit is installed, make sure the minimum blower speed required according to Table 14 is set