Haier CA0065EANR, Installation And Operation Manual

Page: 16 / 40

13
Installation

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 Criteria Impact factor
Standard
PH 7.5-9.0
○/□
Electric conductivity
≤200 uv/cm(25° ) ○/□
Chloride ion
≤50 ppm □
Sulfate ion
≤50 ppm □
Total iron content
≤0.3 ppm □
Alkali ion
≤50 ppm □
Total hardness
≤50 ppm □
Reference
Sulfur ion N/A
□
Ammonia ion N/A
□
Silicon
≤30 ppm ○
Note: ○ standing for scale,
口
standing for corrosion