AAON RL-240 - Manual (Page 32)

32
Figure 12 - Terminal Block
Startup technician must check for proper
motor rotation and check blower motor
amperage listed on the motor nameplate is
not exceeded. Motor overload protection
may be a function of the variable frequency
drive and must not be bypassed.
Note: All units are factory wired for
208/230V, 460V, or 575V. If unit is to be
connected to a 208V supply, the transformer
must be rewired to 208V service. For 208V
service interchange the yellow and red
conductor on the low voltage control
transformer.
Red-Black for 208V
Yellow-Black for 230V
Wire control signals to the unit’s low
voltage terminal block located in the
controls compartment.
If any factory installed wiring must be
replaced, use a minimum 221°F (105°C)
type AWM insulated conductors.
Rotation must be checked on all
MOTORS AND COMPRESSORS of
three phase units. Supply air blower,
exhaust air blower, return air blower,
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. Variable
frequency drives are programmed to
automatically rotate the fan in the
correct rotation. Do not rely on fans
with variable frequency drives for
compressor rotation.
CAUTION
Scroll compressors are directional
and will be damaged by operation in
the wrong direction. Low pressure
switches on compressors have been
disconnected after factory testing.
Rotation should be checked by a
qualified service technician at startup
using suction and discharge pressure
gauges and any wiring alteration
should only be made at the unit
power connection.
CAUTION