Water Pipe Connection - Haier CA0035EAND Installation And Operation Manua

Installation
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Water Pipe Connection

1. External water pipe system must be equipped with flexible joints, water filter, electronic cleaner,
check valve, drain valve, exhaust valve, shutoff valve, expansion tank, etc.. The expansion tank
shall be located at 1-1.5 m above the highest point of the system; the exhaust valve shall be set
between the highest point of the system and the expansion tank, and insulations shall be arranged
between the tank and the pipe.
2. Water supply system must be a water pump with appropriate flow and head to ensure the normal
water supply to the unit. The circulating water must be softened water.
3. A water filter must be installed in front of the inlet pipe of the unit, and the self-contained water filter
also must be installed.
4. The connection between the water pump and the unit and between the water pump and the water
pipe shall be realized through flexible joints; in addition, the pipe and the water pump shall be
supported separately, so as to not apply any force on the unit.
5. Flushing and heating of water pipe shall be carried out prior to the connection between the pipe and
the unit.
6. The drain valve on the outlet pipe is self-contained; manual or automatic exhaust valve shall be set
at the highest point of the water circulation system; for the normal operation of the unit, the valve
handle must be removed, so that the valve is not adjusted.
7. Water quality control
Industrial water used as hot water is not likely to produce scale; while, well water or river water may
produce a lot of scale, sand and other sediments. So, before flowing into the hot water system, the
water must be filtrated and softened by water softening equipment. If sand or mud deposits in
evaporator, the flow of hot water will be blocked, resulting in freezing; so relevant water values such
as PH, electric conductivity, chloride ion concentration, sulfur ion concentration shall be analyzed
beforehand. Quality criteria of the water for the unit are shown as follows:
Item
Electric conductivity
Standard
Reference
Note: ○ standing for scale, 口 standing for corrosion
Never connect unclean pipe to the unit!
If the unit is to idle for a long time, the water in the water system shall be drained to prevent the plate
heat exchanger being iced.
If the unit is to idle for a short time, the power-off is not allowed, because the unit has automatic
anti-freezing function. When the temperature in the outlet pipe is very low, the unit will automatically
operate for a period to maintain the temperature of the water system and prevent the water pipe from
being frozen, so the unit must be energized in winter. If the unit is not used in winter, drain the water from
the water system or fill such anti-freezing mixture as ethylene glycol and glycerol into the water system.
The water filter must be installed correctly; otherwise, the unit may be damaged. Additionally, the water
filter shall be regularly inspected for any blockage due to dirt.
PH
Chloride ion
Sulfate ion
Total iron content
Alkali ion
Total hardness
Sulfur ion
Ammonia ion
Silicon
Criteria
7.5-9.0
≤200 uv/cm(25° )
≤50 ppm
≤50 ppm
≤0.3 ppm
≤50 ppm
≤50 ppm
N/A
N/A
≤30 ppm
WARNING
11
Impact factor
○/□
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