JOHNSON CONTROLS
139
SECTION 7 – MAINTENANCE
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
7
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.
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.
TABLE 28 -
MAINTENANCE AND INSPECTION
TASK
CONTENTS
FREQUENCY
SCOPE
Recording of operation
data
Collect the operation data (Refer to
155.31-CL1
) and check the
data with the data collected during the factory test.
Weekly
C
Check the steam control
valve
Check to see that the steam control valve operates smoothly.
C
Check of liquid level
. Check the liquid level at each part.
Daily
C
Refine refrigerant
NOTE: Do not loosen the bolts around the flange or
.
Refine the refrigerant.
Every 2-3 weeks
S
Manual purging from
purging tank
. Manually purge non-
condensable gas from the purging tank.
Since, the chiller has
an automatic purge
system, perform
the purge once at
beginning of the
seasons every year.
S
Manual purging from
absorber
. Manually purge non-
condensable gas from the absorber.
Every 2-3 months
S
Replacement of oil in
vacuum pump
Replace the oil in the vacuum pump.
Monthly
C
Check of Vacuum Pump
After replacing the lubricant oil for the vacuum pump, be sure to
pull the pulley belt and check the smooth motion of the pulley.
C
Appearance check
Check the outside of the machine for damage (e.g., leakage
for chilled water and cooling water, rusting, and other evident
deterioration of the chiller). Check the solution pump and
refrigerant pump for abnormal sounds and vibration.
C
C = Customer, S = Johnson Controls Service
