Section 7
COMPRESSOR OPERATION
28
7.6 SUPERVISOR II OUTPUT RELAYS
RELAY OPERATION
RUN RELAY (K1) Contact closure energizes t he compressor starter.
*---DELTA (K2) AtimedcontactusedtoprovideWye---deltatransition
time.
UNL OAD/LOAD (K3) Controls ON LOAD/OFF LOAD operation of the load
control solenoid valve.
COMMON FAULT (K4) Maybeusedtoprovideremoteindicationofanypre---
alarm, maintenance or fault shutdown condition.
DRAIN VALVE (K5) Deluxe only --- controlsasolenoid valveto provideau-
tomatic condensate removal.
FULL LOAD/MODULATE (K6) Deluxe only --- used with sequencing feature.
NOTE: All output relays will handle 8 amperes at 120/240 VAC.
7.7 MOTOR ROTATION CHECK
After the electrical installation has been done, it is
necessary to check the direction of motorrotation.
Pull out the EMERGENCY STOP buttonand press
once, quickly a n d in succession, the (START) “I”
and(STOP)“O”pads. Thisactionwillbump---start
themotor for averyshorttime. Whenlookingatthe
motor from the control panel side, view t he cou-
pling by looking through the air inlet duct on the
lower side of the adapter fan housing. The cou-
pling should be turning clockwise. If the reversed
rotationisnoted,disconnectthe powertothestart-
er and exchange a ny two of the three power input
leads, then recheck rotation. A “Direction of Rota-
tion” decal is located on the motor and cooler
shroudtoshowpropermotor/compressorrotation.
7.8 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 motortocheck for correct rotation of fan(re-
fer to Section 7.7).
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 valveto assureproper
nameplate pressure unload setting is correct.
The compressor w ill unload at nameplate pres-
sure. If a dj ustments are necessary, see Control
System Adjustments.
7. Observe the operating t emperature. I f the oper-
ating 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.
7.9 SUBSEQUENT START--UP PROCEDURE
On subsequent start---ups, check that t he proper
level is visible in the fluid level sight glass and sim-
ply press “I” for manual or “
”forautomaticop-
eration. When the compressor is running, observe
the various parameter displays.
7.10 SHUTDOWN PROCEDURE
To shut the compressor down, push “O”pad.
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