AAON CN-140 - Manual (Page 26)

26
Startup
(See back of the manual for startup form)
Before the startup of the condensing unit be
sure that the following items have been
checked.
1. Verify that electrical power is available
to the unit.
2. Verify that any remote stop/start device
is requesting the condensing unit to start.
Cycle through all the compressors to
confirm that all are operating within
tolerance.
While performing the check, use the startup
form to record observations of compressor
amps and refrigerant pressures.
Axial Flow Condenser Fans
Multi-Wing Z Series Aluminum Fan Blade
Pitch Angle Setting Instructions
1. Maintain the balance of fan
Mark the hub castings across a joint, so the
fan hub can be reassembled in the same
orientation.
Mark the location of any balancing weight.
Balancing weight will be on the outer bolt
circle, in the form of washers, and/or longer
bolts, or an additional balancing nut.
Number the blades and blade sockets, so that
they are replaced into their original position.
Figure 9 - Fan with the HUB on the top and
RET on the bottom.
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING
Improper installation, adjustment,
alteration, service, or maintenance
can
cause property damage,
personal injury, or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician
WARNING
Rotation must be checked on all
MOTORS AND COMPRESSORS of
three phase units. All motors, to
include and not be limited to pump
motors and condenser fan motors,
should all be checked by a qualified
service technician at startup and any
wiring alteration should only be made
at the unit power connection.
CAUTION
Before completing installation, a
complete operating cycle should be
observed
to verify that all
components are functioning properly.
CAUTION
Bushing
Mount