292424-XIM-A-0307
Unitary Products Group
11
START-UP
CRANKCASE HEATER
The crankcase heater must be energized at least 8 hours
before starting the compressor. To energize the crankcase
heater, the main disconnect switch must be closed. During
this 8 hour period, the system switch on the room thermostat
must be OFF to prevent the compressor from starting.
Make sure that the bottom of the compressor is warm to the
touch to prove crankcase heater operation.
PRE-START CHECK
Before starting the unit, complete the following check list:
1.
Have sufficient clearances been provided?
2.
Has all foreign matter been removed from the interior of
the unit (tools, construction or shipping materials, etc.)?
3.
Have the condenser fans been rotated manually to
check for free rotation?
4.
Are all wiring connections tight?
5.
Does the available power supply agree with the name-
plate data on the unit?
FIGURE 5 - EXTENDING THE SERVICE PORTS
Do not attempt to start the compressor without at
least 8 hours of crankcase heat or compressor
damage can occur.
