5168274-BIM-I-1121
Johnson Controls Ducted Systems
39
Start-Up (Cooling)
Prestart Check List
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.
Operating Instructions
1.
Turn unit electrical power on.
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).
4.
The second stage of the thermostat will energize second
stage compressor if needed.
Post Start Check List
1.
Verify proper system pressures for both circuits.
2.
Measure the temperature drop across the evaporator coil.
3.
Measure the system amperage draw across all legs of 3
phase power wires.
4.
Measure the condenser fan amperage draw.
Shut Down
1.
Set the thermostat to the lowest temperature setting.
2.
Turn “OFF” all electric power to unit.
Table 18: Electric Heat Anticipator Setpoint
Heater
Kw
Voltage
Setting, Amps
Th1
Th2
18
208/230-3-60
0.29
-
36
0.29
0.29
54
0.29
0.58
72
0.29
0.58
18
460-3-60
0.29
-
36
0.29
0.29
54
0.29
0.29
72
0.29
0.29
18
575-3-60
0.29
-
36
0.29
0.29
54
0.29
0.29
72
0.29
0.29
