Sullair SN55 User Manual page 61

SN55, SN55S, SN55V, SN75, SN75S, SN75V User Manual
site the compressor unit, the shaft should be turning
clockwise. If the reversed rotation is noted, disconnect
the power to the starter and exchange any two of the
three power input leads, then re-check rotation. A "Direc-
tion of Rotation" decal is located on the motor drive hous-
ing to show proper motor/compressor rotation. An
alternative to this procedure is to set the STS monitor to
display the P1 separator/sump tank pressure. Pull out the
EMERGENCY STOP button and press once, quickly and
in succession, the Start and Stop buttons. This action will
A. Fan motor rotation direction
B. Main motor rotation direction
Figure 4-2: Motor rotation direction
02250247-571 R04
Subject to EAR, ECCN EAR99 and related export control restrictions.
bump start the motor for a very short time. If motor rota-
tion is correct there will be immediate pressure shown. If
no pressure is present, reverse rotation is occurring. Dis-
connect the power to the starter and exchange any two of
the three power input leads. Recheck rotation as outlined
above.
Fan motor rotation should also be checked. It should
rotate counter-clockwise when viewing the fan motor
from the backside of the motor.
4: Installation
60