JOHNSON CONTROLS
138
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 7 – MAINTENANCE
TABLE 29 -
MAINTENANCE AND INSPECTION
TASK
CONTENTS
FREQUENCY
SCOPE
Recording of operation
data
Collect the operation data (Refer to
155.30-CL1
)
and check the data with the data collected during
the factory test.
1 weekly
C
Check of liquid level
See
at each part.
Daily
C
Check of operation of
hot water 3-way valve
Visually check that the hot water 3-way valve is
operating smoothly.
Every 6 months
C
Refine refrigerant
Use the procedure shown in
Every 6 months
S
Manual purging from
purging tank
See
Manually
purge non-condensable gas from the purging tank.
The chiller has an
automatic purge
system. Perform it
once at beginning of
the seasons every year
and once per every 2-3
months.
S
Manual purging from
absorber side
See
purge non-condensable gas from the absorber
side.
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 the replacement of the lubricant oil for the
vacuum pump, be sure to pull the pulley belt and
check the smooth motion of the pulley.
Monthly
C
Appearance check
Check the outside of the machine for damage
(leakage for chilled water and cooling water,
rusting, or other apparent damage). Check the
solution pump and refrigerant pump for abnormal
sounds and vibration.
Monthly
C
Measurement of
insulation resistance of
electric devices
Measure the insulation resistance of the main
circuit and motors (solution pump, refrigerant
pump) mainly to check for lowering of insulation.
When measuring the insulation resistance, be
sure to disconnect the wires of the temperature
controller, or other wires that may interfere with the
measurement.
Yearly
S
Check of terminals for
looseness
Check each terminal in the control panel for
looseness.
Yearly
S
Check of operation of
control panel
Check the operation of the control panel to prevent
troubles caused by malfunction of the control panel.
Yearly
S
Check of capacity of
purge unit
See
capacity of the purge unit.
Every 6 months
S
Check of leakage
through purge solenoid
valves
By measuring vacuum down speed, check for
leakage through purge solenoid valves.
Yearly
S
Overhaul check of purge
solenoid valves
Perform overhaul of purge solenoid valves.
Yearly
S
Check of airtightness
Measure the quantity of non-condensable gas
discharged from the vacuum pump.
Every 6 months
S
C = Customer and S = Johnson Controls Service
