7.3
Scheduled Maintenance
The maintenance operations detailed in the following table should be carried out on a regular basis by a suitably
qualified Service Engineer. It should be noted that the interval necessary between each ‘minor’ and ‘major’ service
can vary depending on, for instance, application, site conditions and expected operating schedule. Normally a
‘minor’ service should be carried out every three to six months and a ‘major’ service once a year. It is recommended
that your local JCI Service Centre is contacted for recommendations for individual sites.
Standard Units
SERVICE SCHEDULE
MINOR SERVICE
MAJOR SERVICE
All items under Minor Service plus:
Unit general:
Check thermal insulation.
Check main structure.
Check vibration isolators.
Check paint-work.
Refrigerant systems general:
Check relief valves.
Check solenoid valves.
Check fusible plugs.
Check for pipework damage.
Check for leaks. (see note 1)
Compressors:
Check oil level.
Check oil pressure.
Check unloader operation.
Check condition of oil.
Carry out full oil analysis.
Cooler:
Check water flow.
Check water pH / glycol strength.
Check water pressure drop.
Condenser (YCSE Only):
Check water flow.
Check water pH / glycol strength.
Check water pressure drop.
Power & Control system general:
Check panel condition.
Check all wiring connections for tightness.
(Main power supply OFF).
Check mains and control wiring.
Check compressor contactors.
Check sensor locations.
Check sensor / transducer calibration.
Check mechanical HP cut-outs.
Check motor protectors.
Check emergency stop.
Check flow protection device
operation.
Check contactor contacts.
Note 1: If the plant room has a Leak Detection Monitoring System installed only an annual leak check is required.
(EG -1005/2009 art. 23 applicable in EU countries).
7.4
Pressure Vessel In-Service Inspection
There is no corrosion on the refrigerant side therefore in-service inspection on the refrigerant side is not necessary.
For the water side, if the water used is treated in accordance with Section 4.4, in-service inspection is not necessary.
In the design of the vessels used in the unit a 1mm corrosion allowance has been used to consider slight corrosion
on the water side. This allowance is sufficient to cover the lifetime of the unit.
JCI believes that periodic in-service proof testing (e.g.; hydro tests) is not required. However, JCI recognises that
national regulations may require such testing to be conducted.
7
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