Section 6
COMPRESSOR OPERATION-
SUPERVISOR II
24
6.6 SUPERVISOR OUTPUT RELAYS
RELAY OPERATION
RUN RELAY (K1) Contact closure energizes the compressor starter.
*-DELTA (K2) A timed contact used to provide wye-delta transition
time.
UNLOAD/LOAD (K3) Controls ON LOAD/OFF LOAD operation of the load
control solenoid valve.
COMMON FAULT (K4) May be used to provide remote indication of any pre-
alarm, maintenance or fault shutdown condition.
DRAIN VALVE (K5) Controls a solenoid valve to provide automatic con-
densate removal.
FULL LOAD/MODULATE (K6) Used with sequencing feature.
NOTE: All output relays will handle 8 amps at 120/240 VAC.
6.7 INITIAL START-UP PROCEDURE
The following procedure should be used to make the
initial start-up of the compressor.
1. Read the preceding pages of this manual thor-
oughly.
2. Jog motor to check for correct rotation of fan (re-
fer to Section 2.6).
3. Be sure that all preparations and checks de-
scribed in the Installation Section have been
made.
4. Open the shut-off valve to the service line.
5. Check for possible leaks in piping.
7. Slowly close the shut-off valve to assure proper
nameplate pressure unload setting is correct.
The compressor will unload at nameplate pres-
sure. If adjustments are necessary, see Control
System Adjustments.
7. Observe the operating temperature. If the operat-
ing temperature exceeds 200°F (93°C), the cool-
ing system and installation environment should
be checked.
8. Open shut-off valve to the service line.
9. Reinspect the compressor for temperature and
leaks the following day.
6.8 SUBSEQUENT START-UP PROCEDURE
On subsequent start-ups, check that the proper lev-
el is visible in the fluid level sight glass and simply
press “I” for manual or “
” for automatic operation.
When the compressor is running, observe the vari-
ous parameter displays.
6.9 SHUTDOWN PROCEDURE
To shut the compressor down, push “O” pad.
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