Unit installation
APPENDIX
WEEKLY QUARTERLY SEMI-ANNUALLY YEARLY
COMPRESSORS:
1.
Check system operating pressures and temperatures. x
2.
Check oil level.
x
3.
Check condition of oil.
x
4.
Check liquid injection operation. x
5.
Check operation of capacity control device (slider & solenoid valves) x
6.
Check crankcase heater operation. x
7.
Sample compressor oil. x
8.
Check integral check valve x
9.
Check pressure relief valve and roller bearings x
REFRIGERANT FLOW CIRCUIT:
1.
Check for pipework dama
g
e.
x
2.
Check filter drier
x
3.
Check for leaks
(
complete leak check
)
x
4.
Check liquid line si
g
ht
g
lass / moisture indicator
x
5.
Check suction superheat at compressor x
6.
Check condenser liquid subcoolin
g
x
7.
Check expansion valves, solenoid valves and check valves. x
8.
Check economizer o
p
eration.
x
A
IR COOLED CONDENSERS:
1. Check condenser coils for dirt / debris and clean as required.
x
2.
Check fans and fan guards. x
3.
Check fan motor bearin
g
s.
x
COOLER:
1.
Check water flow.
x
2.
Check water pressure drop & cooler efficiency. x
3.
Check cooler heater operation
(
if provided
)
.
x
4.
Check water pH / glycol strenth. x
ELECTRICAL & CONTROL SYSTEM:
1.
Check condition of control panel and all components
x
2.
Check power and control wirin
g
.
x
3.
Check sensor locations.
x
4. Check mechanical HP cut-outs and water flow switch operation.
x
5.
Check under volta
g
e monitor and main disconnect.
x
6.
Check ti
g
htness of all wirin
g
connections
x
7.
Check compressor contactors/ overloads/ breakers. x
8.
Check fan contactors / breakers. x
9.
Check sensor / transducer calibration x
10.
Check compressor motor protectors. x
11.
Check contactor contacts. x
MICROPROCESSOR CONTROLLER:
1.
Check fault history x
2.
Check operating set points. x
3.
Check HP and OP safety cut-out funtion. x
4.
Check pump-down function. x
5.
Check capacity load / unload function. x
6.
Check fan control function. x
7.
Check ambient cut-out function. x
UNIT GENERAL:
1.
Check thermal insulation on cooler and piping. x
2.
Check vibration isolators, repair/replace as necessary x
3.
Check unit structure for loose bolts/ screws and tight as necessary x
4. Check for rusted/dented/ damaged body parts and repair/ repaint as
necessary.
x
NOTES:
1.
2.
PROCEDURE
PREVENTIVE MAINTENANCE REQUIREMENT FOR
ZAMIL ASQ- SERIES SCREW CHILLERS
The above proceedures should be carried out by suitably qualified personnel only. A record of these procedures being successfully carried out must be maintained by the
equipment owner as a proof of adequate maintenance which may be required later for warranty validation purposes.
For guidelines and detailed information pertaining to the above maintenance procedures, refer relevant sections in the maintenance manual.
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