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If the motor is of TEWAC (Totally Enclosed Water-to-Air Cooled) design, the maximum inlet
water temperature and the water flow rate (GPM) at the air cooler must be as shown by the
certified drawing. Otherwise, the discharge air temperature from the cooler (actually the
ambient air for the motor as shown by the main nameplate) could be too high for the motor to
properly cool.
Check Rotation (Hermetic Motor)
1.
Engage the main motor disconnect on the front of the starter panel. The motor is now ready
for rotation check.
2.
After the default screen Status message states ‘‘Ready for Start’’ press the LOCAL softkey;
start-up checks will be made by the control.
3.
When the starter is energized and the motor begins to turn over, check for clockwise
rotation (Figure 30).
If Rotation Is Proper
, allow the compressor to come up to speed.
If the Motor Rotation Is Not Clockwise
(as viewed through the sight glass), reverse any
2 of the 3 incoming power leads to the starter and recheck rotation.
Note:
Starters may also have phase protection and will not allow a start if the phase is not cor-
rect. Instead, a Starter Fault message will occur if this happens.