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FORM 160.78-O1
ISSUE DATE: 11/30/2012
leaving condenser and saturated condensing tem-
perature should not exceed the difference recorded
for a new unit by more than 4°F (2.2°C)).
Weekly
1. Check the refrigerant charge. Refer to Checking
The Refrigerant Charge During Unit Shutdown in
SECTION 3 - MAINTENANCE.
Monthly
1. Leak check the entire chiller.
Semi-Annually (Or More Often As Required)
1. Check controls.
Annually (More Often If Necessary)
1. Evaporator and Condenser.
A. Inspect and clean water strainers.
B. Inspect and clean tubes as required.
C. Inspect end sheets.
2. Compressor Drive Motor.
A. Meg motor windings.
3. Inspect and service electrical components as nec-
essary.
4. Perform refrigerant analysis.
NEED FOR MAINTENANCE OR SERVICE
If the system is malfunctioning in any manner or the
unit is stopped by one of the safety controls, refer to
the Operation Analysis Chart shown in Table 4 (SEC-
TION 4 - TROUBLESHOOTING). After consulting
this chart, if you are unable to make the proper repairs
or adjustments to start the compressor or the particular
trouble continues to hinder the performance of the unit,
please call the nearest Johnson Controls District Of-
fice. Failure to report constant troubles could damage
the unit and increase the cost of repairs.
STOPPING THE SYSTEM
The OptiView™ Control Center can be programmed
to start and stop automatically (maximum - once each
day) whenever desired. Refer to the YMC
Control Center Operation Manual (Form 160.78-O1).
To stop the chiller, proceed as follows:
JOHNSON CONTROLS
1. Push the soft shutdown key on the homescreen of
the OptiView
automatically. In the event of an unusual circum-
stance requiring immediate stoppage, a safety
stop switch is located on the side of the control
panel. Normal stop eases the driveline to stop and
should always be used instead of the safety stop
during regular operation.
2. Stop the chilled water pump (if not wired into the
Microcomputer Control Center, in which case it
will shut off automatically. The actual water pump
contact operation is dependent upon the selection
on the SETUP screen.)
3. Open the switch to the cooling tower fan motors,
if used.
PROLONGED SHUTDOWN
If the chiller is to be shut down for an extended period
of time (for example, over the winter season), the fol-
lowing procedure should be followed.
1. Test all system joints for refrigerant leaks with a
leak detector. If any leaks are found, they should
be repaired before allowing the system to stand
for a long period of time.
During long idle periods, the tightness of the sys-
tem should be checked periodically.
2. If freezing temperatures are encountered while
the system is idle, carefully drain the cooling wa-
ter from the cooling tower, condenser, condenser
pump, and the chilled water system-chilled water
pump and coils.
Open the drains on the evaporator and condenser
liquid heads to assure complete drainage. Drain
the Variable Speed Drive cooling system.
3. If freezing temperatures are encountered for peri-
ods longer than a few days, the refrigerant should
be recovered to containers to prevent leakage from
O-ring joints.
4. On the SETUP Screen, disable the clock. This
conserves the battery.
5. Open the main disconnect switches to the com-
Optiview
2
TM
pressor motor, condenser water pump and the
chilled water pump. Open the 115 volt circuit to
the Control Center.
SECTION 2 - SYSTEM OPERATING PROCEDURES
panel. The compressor will stop
TM
2
13
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