Johnson Controls York MaxE YK Series, Manual

Page: 111 / 139

JOHNSON CONTROLS
FORM 160.75-O1 (309)
12
Weekly
1. Check the refrigerant charge. (See “Checking The
Refrigerant Charge”, page 28.)
Monthly
1. Leak check the entire chiller.
quarterly
1. Perform chemical analysis of oil.
Semi-Annually (or more often as required)
1. Change and inspect compressor oil filter element.
2. Oil return system.
a. Change dehydrator.
b. Check nozzle of eductor for foreign particles.
3. Check controls and safety cutouts.
Annually (more often if necessary)
If quarterly inspection indicates oil is
fine, replacing the oil is not necessary.
1. Drain and replace the oil in the compressor oil sump.
(See “Oil Charging Procedure” page 21.)
2. Evaporator and Condenser.
a. Inspect and clean water strainers.
b. Inspect and clean tubes as required.
c. Inspect end sheets.
3. Compressor Drive Motor (See motor manufacturers
maintenance and service instruction supplied with
unit)
a. Clean air passages and windings per manufactur-
ers instructions.
b. Meg motor windings – See FIG. 11 for details.
c. Lubricate per motor manufacturer recommenda-
tions.
4. Inspect and service electrical components as neces-
sary.
5. 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, consult
the “Operation Analysis Chart”, (Table 1), pages 22
and 23 of this instruction. After consulting this chart,
if you are unable to make the proper repairs or adjust-
ments to start the compressor or the particular trouble
continues to hinder the performance of the unit, please
call the nearest Johnson Controls District Office. 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 Form 160.54-O1. To stop the
chiller, proceed as follows:
1. Push the soft shutdown key on the homescreen on the
OptiView panel or rapid stop with the
COMPRES-
SOR STOP/RESET
switch. The compressor will
stop automatically. The oil pump will continue to
run for coastdown period. The oil pump will then
stop automatically.
2. Stop the chilled water pump (if not wired into the
Microcomputer Control Center, in which case it will
shut off automatically simultaneously with the oil
pump.) (The actual water pump contact operation is
dependent upon the position of Microboard jumper
J54.)
3. Open the switch to the cooling tower fan motors, if
used.
4. The compressor sump oil heater is energized when
the unit is stopped.
system operating procedures