TM9-4120-400-14
PHASE SEQUENCE RELAY K5, 3 phase units only. - continued
4-30.
Figure 4-25. Phase Sequence Relay K5
NOTE
This relay will energize only when all three phases of input power are in proper sequence
and when input voltage and frequency are within 10% of that specified (208 volt,
60 hertz).
TESTING
1. Check that power connections are properly connected.
Move circuit breakers CB1 and CB2 to on position.
2.
Momentarily turn mode selector switch to VENT position then back to OFF.
3.
To check correct input phasing, see that blower is rotating counterclockwise facing shaft end, if not, reverse
4.
two input leads at power source and re-check. (See para 4-5.)
To test phase sequence relay, turn mode selector switch to COOL position and see that condenser fan is on,
5.
if not, replace phase sequence relay.
4-79