Section 5
COMPRESSOR OPERATION
23
5.10 SUPERVISOR OUTPUT RELAYS
RELAY OPERATIO N
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 optional solenoid valve to provide automatic
condensate removal.
FULL LOAD/MODULATE (K6) Used with optional sequencing feature.
NOTE: All output relays will handle 8 amps at 120/240 VAC.
5.11 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 motor
( r ef er t o S ec t ion 2. 8) .
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.
6. Slowly close the shut--off valve to assure proper
nameplate pressure unload setting is correct.
The compressor will unload at nameplate pres-
s ur e. I f adjus t m ent s ar e nec es s ar y, s ee Cont r ol
Syst em Adjust ment s.
7. Observe the operating temperature. If the operat-
ing temperature exceeds 200
_
F(93
_
C), the
cooling 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.
5.12 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.
5.13 SHUTDOWN PROCEDURE
To shut the compressor down, push “
O
” pad.
To Next Page
Loading...
