Flooded type water cooled screw chiller (PCB Control)
99
8
Water with organic substance
Large quantity
——
Easily generates scale
9
Exhaust gas from auto,
chemical factory, plating
factory, sewage plant,
ammonia refrigeration plant
and fiber factory
Strong
Copper tubes of condenser
may be eroded and
perforated.
10
Dusty places such as plastic
plant
Large quantity
11
Sulfurous gas in the air
Ultra-strong
12
Natural pollution such as
damp air near the coast or
insects in the field goes into
cooling tower.
Large quantity
Strong
Cycle under normal temp. (A):
(Capacity of co Capacity of pipe+ Capacity of container)×1/3(Thickness of detergent 33%)
Cycle under normal temp. (B):
(Capacity of flume of cooling tower+ Capacity of co Capacity of pipe)×1/10(Thickness of
detergent 10%)
In case doing cleaning after the unit stops, the capacity of flume of cooling tower can be 1/2 or 1/3 of
rated value; if doing cleaning as the unit is running, the capacity should achieve rated value.
Precautions on usage of detergent
When doing cleaning, please wear rubber gloves and do not expose your skin or your clothes to the
detergent. In case touching the detergent, please wash it with clean water.
The container for detergent should be made of plastic or glass rather than lead. The used detergent
should be neutralized with lime or soda before draining
Detergent is harmful to human; please keep it away from children.
Turn on the unit after cleaning to ensure it is clean. If necessary, please do cleaning again.
c) Precautions of chemical cleaning
When doing cleaning please wear rubber gloves and do not expose your skin or your clothes to the
detergent. In case of touching the detergent, please wash with clean water immediately.
The container for detergent should be made of plastic or glass rather than lead.
The used detergent should be neutralized with lime or soda before draining.
Detergent is harmful to human body; please keep it away from children.
Turn on the unit to check the effect after cleaning work done. If necessary, please do cleaning again.
Water Treatment
Before every start-up, clean and flush the cooling water circuit. Make sure tower blow-down or bleed-off
is operating. It should be recognized that atmospheric air contains many contaminants that increase the
need for proper water treatment. The use of untreated water can result in corrosion, erosion, sliming,
scaling or algae formation. Midea assumes no responsibility for the results of untreated or improperly
treated water.
See appendix 1 for water quality requirements.
