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MAINTENANCE
#
CAUTION:
Correctly select cleaning agent depending on scales
in the plate type heat exchangers. The cleaning
chemicals are different depending on fouling degree.
This plate type heat exchanger is made of stainless
steel. Do not use a cleaning agent containing
hydrochloric acid or fluorine compound. If used the
heat exchanger will be damaged, resulting in
refrigerant leakage.
After cleaning with cleaning agent, clean inside of
water piping including the heat exchangers by using
clean water. Perform water treatment (preventive
treatment) in order to prevent the water circuit from
corrosion or re-adhering of scales after cleaning.
In the case that a cleaning agent is used adjust
concentration of the cleaning agent, cleaning period
and temperature according to the scale degree.
In the case that acid cleaning is performed,
neutralisation treatment is required after cleaning.
Treatment for neutralisation fluid should be performed
by a waste fluid contractors.
The cleaning agent and neutralising agent have
erosiveness and stimulativeness against eyes, skin,
mucous membrane etc. Therefore use protection
tools (protection glasses, protection gloves, protection
shoes, protection cloth, protection mask, etc.) in order
not to absorb or touch these agents during this
cleaning work.
11.4.
CLEANING METHOD
N
°°°°
Name
N
°°°°
Name
1
Chiller Unit
6
Waste Fluid Tank
2
Chilled Water / Inlet Piping
7
Cleaning Water Tank
3
Acid-resistant Type Water Pump
8
Hose
4
Hose
9
Chilled Water / Outlet Piping
5
Diluted Cleaning Fluid
Water
Refrigerant
