Table 28: Lifespan of common parts
Part name Lifespan of common parts Remarks
Rubber hose set for purge line Every 18,000/Hr
Oil for purge pump Every month
Refrigerant tank float switch Every 60,000/Hr
Water quality control
Use the following guidelines ensure of the highest water quality control standards:
• Limit the water pressure to the maximum safe working pressure for chilled and cooling water.
• Install a 10 or finer mesh strainer in the chilled and cooling water piping.
• Install a thermometer and a pressure gauge in the inlet and the outlet of the chilled and cooling
water piping.
• Install tapping (with valve) for chemical cleaning of the inlet and the outlet of the chilled and
cooling water piping.
• Install an air vent valve at the highest part of the piping and a drain valve at the lowest part of
the piping.
• Replace the water regularly and control the water quality. Operating the chiller for long periods
of time with low quality water can cause corrosion and the production of scale.
• Make sure the shut off valves installed at the chiller inlet of the chilled water, cooling water,
steam supply and steam drain are completely open.
Note: If the chiller runs without the valves completely open, a strong turbulent flow can be
generated. This turbulence can cause damage in the water chamber case and the copper tube
of the chiller. If you need to adjust the flow rate of the chilled water and the cooling water,
adjust the valves installed at the outlet side of the chiller.
Chemical water treatment
As the mineral content of the water circulated through the evaporator, condenser, absorber, and
generator varies, the water used can corrode the tubes or deposit heat resistant scale in them.
Perform a chemical analysis of the water before the system is installed. Consult a reliable water
treatment company to determine if treatment is necessary. If it is, the company can provide
treatment for the water to help prevent damage to the tubes.
Replacement of water
As the cooling water system can be polluted by various factors, it must be cleaned and the water
it in must be replaced periodically. If the water is not treated at all by the cooling tower, the
suggested interval to replace the cooling water is:
District polluted with sulfurous acid gas --- 5 days
Common district --- 10 days
If the water is blown manually or automatically, the replacement period can be lengthened as
follows:
District polluted with sulfurous acid gas --- 1 month
157YHAU-C Single Effect Steam-Fired Absorption Chiller
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