MAINTENANCE
67
English
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Connect water (brine) pipes to the nearest place of the product by flange, and make the pipe and the product to
be separated. Install valve at inlet/outlet of pipes, drain valve at inlet, and air purge valve at outlet of water (brine)
pipe.
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Maintain the water or brine storage as set standard. If the amount is too low, compressor will be stopped even
operated for short time for light load, and repeat operation and stopping. Such operation may result in shortening
life of the product and product malfunction due to repetition of compressor operation. Especially, be aware of
amount at bypass system if water temperature and capacity control is done by bypass system.
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There is a possibility of scale generated on plate type heat exchanger, so periodical chemical cleaning is necessary
to remove scale. Install chemical input between valve and the product.
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Install auto air valve where air can remain easily in water pipe system.
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If the product is stopped for a long time during winter time, or stop the operation for night time, take appropriate
countermeasures (water drain, circulating pump operation heater, etc.) to prevent freezing in cold region where
outdoor temperature falls below 0 °C . When water pipe freezes, it will cause damage to the plate type heat
exchanger and therefore preventive measure must be taken according to the situation.
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Water maintenance standard for chilled/heating water is circulating water. If the supplied water is drained out
without circulation, it may cause corrosion on its passage.
- Refer to page 68 for water maintenance standard.
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Water storage must be used within the range. 50 ~ 200 % of rated water storage can be used, but using rated
water storage is recommended.
- If water storage is low, it may cause performance decrease due to scale accumulation, thermo operation to
prevent freezing, and gas leakage due to holes created by corrosion.
- If water storage is over, it may cause corrosion.
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Do not let air flow into the circulating water system. If dissolved oxygen increases or foreign substances among
the air condenses in water, corrosion may occur.
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Be aware of cavitation as checking flow speed of water system, installed place of expansion vessel, and air purging
place in the middle of pipes.
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In case of semi-closed chilled/heating water system with thermal storage, exchange water (once in 1 ~ 2 years),
clean and maintain thermal storage periodically. New concrete thermal storage may elute foreign substances, so
pH of thermal storage water may be over 10. If pH is over the standard, copper may be corroded faster. Exchange
the water before it happens. Also if thermal storage is used for a long time, water leakage may occur due to crack.
- Water leakage is not critical to maintaining water. But in case of using sea water or contaminated
underground water, corrosion may occur by slime generated by microbe or calcium carbonate.
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Install flexible joints at water pipes of front and behind side of the product and the pump to prevent vibrations.
CAUTION
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Be careful not to install inlet/outlet of water pipe reversely. If installed wrong, operation is impossible and may
cause product malfunction.
Summary of Contents for AG042KSVANH
Page 113: ...MAINTENANCE 113 English Memo ...
