24
Water pipe installation
t
Circle (O) marks in the chart show the factor relevant to corrosion or water scale.
t
When the water temperature is over 40˚C, steels without protective coating may corrode when expose to water.
Applying corrosion prevention material or degassing can be effective measure to prevent corrosion.
t
For the cooling water and the make-up water, used under closed circuit water system with closed circuit cooling
tower, should satisfy the standard shown in above table.
t
Supplied water or make-up water should be tap water, industrial water or groundwater. Purified water,
neutralized water and softened water should not be supplied.
t
15 items in the above table is a typical factor for corrosion and/or water scale.
t
When water pipe circuit freezes, it will cause breakage on the plate type heat exchanger. Therefore appropriate
preventive measure must be taken according to the situation.
- Drain remaining water in the water pipe
- Constantly operate the water pump to circulate the water within the water pipe
- Install a self-regulating heat cable on the water pipe
t
Open the valve of the water pipe connected to the outdoor unit after flushing (cleaning foreign substances in
water pipe) is completed.
t
Check that air is vented from the water pipe and circulation amount is secured before opening the service valve
on the refrigerant side of the outdoor unit.
t
When circulating water stops during outdoor nit operation, it may cause breakage on plate type heat exchanger.
NOTE
k}tGokyvGo{ptXYWZ`]]hTXluUGGGY[
YWXZTW_TW]GGG㝘㤸G`a[[aY_
