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FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
20. Press the Refrigerant Pump Auto button.
21. Return the valve cap. There is an O-ring between
the cap and valve. When fitting the cap, make sure
that the O-ring is set normally.
Precautions for De-crystallization
• Cycle the chilled and cooling water pumps off and
on during the melting process.
• Remove any sensors that are sensitive to heat be-
fore you start the melting operation. The tempera-
ture of the chilled and cooling water that remains
in the absorption chiller may rise to about 158°F.
• When you start the chiller after melting the crys-
tals, discharge the chilled and cooling water first.
If that water is left in the machine, the paint on the
inside walls may deteriorate.
TABLE 28 - MAINTENANCE AND INSPECTION
TASK
Recording of operation
Collect the operation data (Refer to 155.31-CL1) and check the
data
data with the data collected during the factory test.
Check the steam control
Check to see that the steam control valve operates smoothly.
valve
Check of liquid level
See Table 43 on page 160. Check the liquid level at each part.
See NOTE: Do not loosen the bolts around the flange or
remove the disk from the holder. If the disk is removed for any
Refine refrigerant
reason, it must be replaced with a new one! on page 30.
Refine the refrigerant.
Manual purging from
See Purge Procedure on page 132 . Manually purge non-
purging tank
condensable gas from the purging tank.
Manual purging from
See Purge Procedure on page 132 . Manually purge non-
absorber
condensable gas from the absorber.
Replacement of oil in
Replace the oil in the vacuum pump.
vacuum pump
After replacing the lubricant oil for the vacuum pump, be sure to
Check of Vacuum Pump
pull the pulley belt and check the smooth motion of the pulley.
Check the outside of the machine for damage (e.g., leakage
for chilled water and cooling water, rusting, and other evident
Appearance check
deterioration of the chiller). Check the solution pump and
refrigerant pump for abnormal sounds and vibration.
C = Customer, S = Johnson Controls Service
JOHNSON CONTROLS
MAINTENANCE ITEMS
Maintenance and inspection items along with standard
inspection periods are shown in the next table. For de-
tails, contact your local Johnson Controls Service Cen-
ter.
Inspection frequency may be adjusted according to the
actual operating conditions.
CONTENTS
SECTION 7 – MAINTENANCE
FREQUENCY
SCOPE
C
Weekly
C
Daily
C
Every 2-3 weeks
S
Since, the chiller has
an automatic purge
system, perform
S
the purge once at
beginning of the
seasons every year.
Every 2-3 months
S
C
C
Monthly
C
139
7
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Troubleshooting
