Motor Rotation Direction Check - Sullair ShopTek ST4 User Manual

4: Installation

4.7 Motor rotation direction check

1. Main motor direction of rotation
2. Fan motor direction of rotation
Figure 4-4: Main motor/fan motor direction of
rotation—ST4, ST5, ST7
Motor rotation check must be done at compressor start-
up after the wiring has been installed. See Figure 4-4 and
Figure 4-5. The compressor can be damaged if it runs in
the wrong direction for more than a few seconds. Motor
rotation can be viewed through the openings in the belt
guard. Pull out the EMERGENCY STOP button and
press once, quickly and in succession, the
pad and (STOP) pad. This action will bump start the
38
ShopTek™ ST4, ST5, ST7, ST11, ST15 Three-phase 60 Hz User Manual
(START)
88292018-236 R00
Subject to EAR, ECCN EAR99 and related export control restrictions.
1. Main motor direction of rotation
2. Fan motor direction of rotation
Figure 4-5: Main motor/fan motor direction of
rotation—ST11, ST15
motor. When looking at the motor from the compressor
unit, the shaft should turn clockwise for ST4, ST5 and
ST7 and counterclockwise for ST11 and ST15. If reverse
rotation occurs, disconnect the power to the starter and
exchange any two of the three power input leads, then
re-check rotation. A "Direction of Rotation" decal is
located on the motor drive housing to show proper motor/
compressor rotation.
Fan motor rotation should also be checked. It should
rotate counter-clockwise when viewing the fan motor
from the backside of the motor.