Start-Up (Cooling); Prestart Check List; Cooling Operating Instructions; Post Start Check List - York International ZQ Series Installation Manual

Start-Up (Cooling)

Prestart Check List

About this task:
After installation has been completed:
1. Check the electrical supply voltage being
supplied. Be sure that it is the same as listed
on the unit nameplate.
2. Set the room thermostat to the off position.
3. Turn unit electrical power on.
4. Set the room thermostat fan switch to on.
5. Check indoor blower rotation.
- If blower rotation is in the wrong
direction. Refer to Phasing Section in
general information section.
Check blower drive belt tension.
6. Check the unit supply air (CFM).
7. Measure evaporator fan motor's amp draw.
8. Set the room thermostat fan switch to off.
9. Turn unit electrical power off.

Cooling operating instructions

1. Turn unit electrical power on.
Note: Prior to each cooling season, the
crankcase heaters where equipment must
be energized at least 10 hours before the
system is put into operation.
2. Set the room thermostat setting to lower than
the room temperature.
3. First stage compressors will energize after the
built-in time delay (five minutes).

Post Start Check List

1. Verify proper system pressures.
2. Measure the temperature drop across the
evaporator coil.
74 INSTALLATION MANUAL ZQ SERIES 3 - 5 ton 60 Hertz R-410A
Johnson Controls Ducted Systems