76
MUL
TI V W
ater Mini System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Period (Year)
Procedure
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Product operating condition
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Heat exchanger cleaning (Wash)
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Strainer cleaning
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Water quality check
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Refrigerant leakage check
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Indoor unit filter cleaning
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• The checklist above is based on minimum requirements. Maintenance may need to be increased depending on operating condition and
/ or water quality.
• Before cleaning the heat exchanger, make sure that the water pipe connections are tight so that chemical detergent does not leak.
When cleaning the heat exchanger, close the valves so that chemical detergent does not penetrate into the pressure gauge, etc.
• Dilute the chemical detergent as recommended by the chemical supplier. Note that cleaning the heat exchanger is easier at the initial
stages and becomes difficult after scaling has accumulated. In areas where the water quality is poor, cleaning is required more often.
• Because chemical detergent has a strong acid content, the system must be flushed thoroughly with water after cleaning.
• To verify the system has been properly cleaned, remove the hose at the heat exchanger and, using a flashlight or other bright light
source, visually inspect the interior surfaces of the heat exchanger.
• After completing the visual inspection and determining the heat exchanger is clean—free of debris and mineral deposits and the clean-
ing chemicals have been thoroughly flushed—close the system up, replace the water and purge the air from all air vents located on the
pipe system. Purge the air inside the water piping.
• Always check if the water supply is flowing normally and in the correct direction before operating the unit.
Note:
Table 33: Minimum Maintenance Schedule.
General Maintenance Schedule
MAINTENANCE