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IDX-OM-Y002
Chapter 5
Checks
, Maintenance and Adjustment
IDF60/70/80/90 Series
5.2
Regular maintenance
5-5
b
)
Cleaning procedure when cooling tower is used (circulating method)
1. Connect the cleaning circulation pump (if necessary, use an acid resistant pump) to the
cooling water inlet and outlet of the tank heat exchanger with a hose.
2. Put the cleaning solution into the tank and circulate the fluid for specified period of time.
3. Discharge the cleaning fluid and rinse the cooling tower with water for 20 minutes or longer
to get rid of the cleaning agent.
c
)
Procedure when the cooling tower is used.
1. Inject the detergent into the cooling tower and clean the tower for specified period of time.
2. Discharge the cleaning fluid and rinse the cooling tower with water (change water every 5
minutes for 3 to 4 times) to get rid of the detergent.
2
)
Precautions for chemical cleaning method
When the tank is cleaned, cleaning agent is poured in the tank and left for a specific period of
time, or cleaned with circulating cleaning agent. The latter is more effective. It is necessary to
carefully consider the generation of corrosive gas and corrosion caused by the cleaning agent.
1. Before starting cleaning with circulating agent, check water leakage and pump pressure to
avoid the leakage of cleaning agent.
2. When chemical cleaning is performed, the amount, time and treatment vary depending on the
type of cleaning liquid. Therefore, follow the operation manual of each type of cleaning liquid
when cleaning. Especially pay attention during discharge of water.
3. Cleaning effect can be checked by following points.
・
Scale condition during cleaning.
・
Check the pressure change of the cooling water system with cooling pump discharge
pressure.
Maintain an adequate
water level for
cleaning the tower.
Hose
Tank
(Barrel)
Circulation pump
Water amount 20 to 30
L/min.
Pressure 0.1 to 0.3MPa