Johnson Controls York YHAU-C, Инструкция по установке, эксплуатации и обслуживанию

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Table 27: Maintenance and inspection
Task Contents Frequency Scope
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
(such as leakage for chilled water and cooling
water, rusting, and so on). 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,
and so on.
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 the performance of
purge unit
See Purge procedure . Check the performance of the
purge unit periodically.
Every 6 months S
Check of leakage through
purge solenoid valves
By measuring vacuum down stream, check for
leakage through purge solenoid valves.
Yearly S
Overhaul check of purge
solenoid valves
Perform overhaul of purge solenoid valves
periodically.
Yearly S
Check of airtightness
Measure the amount of non-condensable gas
discharged from the vacuum pump.
Every 6 months S
Check continuity of protective
bonding circuit
Check continuity of protective bonding circuit Yearly S
Analysis of quality of chilled
water, cooling water, and
steam drain
See Water quality control . Control the quality of
chilled water, cooling water, and steam drain within
the standard range. Be sure to perform the first
analysis within one month after the test operation is
started.
Every 2-3 months C
Check the amount of solution
and refrigerant
The solution is not consumed, but the refrigerant
is discharged little by little each time purging
is performed. If the amount of the refrigerant
becomes falls too low, the condensation preventive
function does not work normally. Accordingly, check
the amount 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
10,000 hrs
S
Disassembly inspection and
cleaning of vacuum pump
Disassemble, inspect, and clean the vacuum pump
to maintain its capacity.
S
Replacement of gaskets of
airtight parts
Replace the gaskets of the airtight parts to maintain
the airtightness of the absorption chiller.
4 years
S
Inspection of chilled
water chamber case and
replacement of packing
Every 2 years S
Inspection of cooling
water chamber case and
replacement of packing
Open the water chamber case cover periodically.
Check the inside paint for damage. Check the inside
of the tubes for scales.
Yearly S
153 YHAU-C Single Effect Steam-Fired Absorption Chiller