Air Source Screw Water Chiller Unit – Installation Operation and Maintenance Manual
110
Maintenance Items
Maintenance
Frequency
Acceptability Baseline
(Handling Method)
Remarks
Flake
of
insulation
materials
Anytime
Use adhesives to paste the insulation
materials.
Water
leakage
Once
per
month
Check whether the sewer is blocked.
C.
Compressor
Noise
Anytime
Check whether an abnormal sound can be
heard when starting, operating, or stopping
the unit.
Insulation
resistance
Once
per
year
The insulation resistance must be over 5 M
Ω
when tested using a DC 500 V megger.
Aging of the
shock
absorption
rubber
Once
per
year
Press the shock absorption rubber by
hand. If the rubber is resilient, it is
acceptable.
In-process
inspection
Once
per
3000 hours
Pay attention to noise vibration and oil
level.
In-process
inspection
Once
per
6000 hours
Confirm the actions of safety and
protection devices.
D. Finned heat
exchanger
Fan
Anytime
Air volume is normal and high pressure is
within the normal range.
Cleanness
Once
per
month
Air resistance is normal and high pressure
is within the normal range.
E.
Shell-and-tube
heat
exchanger
User-side
water flow
Anytime
Between –5% and +5%
Temperature Anytime
Within the benchmark range
Anti-icing
fluid density
Once
per
month
Over the set density
Water
quality
Once
per
month
Within the benchmark range
See
appendix
4.
Cleanness
Anytime
Ensure the low pressure is within the
benchmark range during refrigeration.
Drainage
Anytime
Drain the water out of the shell-and-tube
heat exchanger when the heat exchanger
is not used for a long time.
Drain the
water out
of
the
auxiliary
pipes too.
