JOHNSON CONTROLS
146
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 7 – MAINTENANCE
TASK
CONTENTS
FREQUENCY
SCOPE
Check of quantity of
solution and refrigerant
The solution is not consumed, but the refrigerant is discharged
little by little each time purging is performed. If the quantity
of the refrigerant becomes insufficient, the condensation
preventive function does not work normally. Accordingly, check
the quantity of the refrigerant periodically.
yearly
(during operation
at 100%)
S
Disassembly inspection
and cleaning of solution
pump and refrigerant
pump
Sleeve bearings are used for the solution pump and refrigerant
pump, and they are normally lubricated with water solution
of lithium bromide and refrigerant. They are worn gradually,
however. Since excessive wear can cause a pump problem,
disassemble and inspect them periodically. The internal strainer
must be cleaned periodically, too.
2-3 years or
8,000 hrs
S
Disassembly inspection
and cleaning of vacuum
pump
Disassemble, inspect, and clean the vacuum pump to maintain
its capacity.
4 years
S
Replacement of gaskets
of airtight parts
Replace the gaskets of the airtight parts to maintain the
airtightness of the absorption chiller-heater.
4 years
S
Inspection of chilled /
hot water box and
replacement of packing
Open the waterbox cover periodically, check the inside paint for
damage, and check the inside of the tubes for scales.
every 2 years
S
Inspection of cooling
waterbox and
replacement of gasket
every 1 year
S
Repair of paint
(or epoxy
paint) of inside wall of
chilled/hot water and
cooling waterboxes
Repair the paint of the inside wall periodically.
Chilled/hot water: 2
years
Cooling water: \1 year
S
Analysis of solution and
addition of inhibitor
The concentration of the inhibitor must be kept proper to
prevent corrosion of inside parts. Analyze the solution to detect
leakage in the early period.
every 6 months
S
Addition of surface active
agent
Since surface active agent is discharged out of the machine
little by little each time purging is performed, new agent must be
added periodically. If too much surface active agent is added,
however, it will have the opposite effect. Add usually 700 cc per
year.
1 year
S
Filtration and refining of
solution
As the inside of the chiller-heater is corroded, corrosion
particles are increased. Particles accumulated on the heat
exchange tube surfaces lower the heat exchange rate, that is,
the performance. Accordingly, filter the solution periodically.
5-6 years
S
C = Customer, S = Johnson Controls Service
TABLE 26 -
MAINTENANCE AND INSPECTION (CONT'D)
