Haier CA0130EAND [17/42] Water pipe connection and wiring connection

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5.4 Water pipe connection and wiring connection

■ Water Pipe Connection

1. External water pipe system must be equipped with exible joints, water lter, 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 ow and head to ensure the normal water supply

to the unit. The circulating water must be softened water.

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 owing into the hot water system, the water must be

ltrated and softened by water softening equipment. If sand or mud deposits in evaporator, the ow 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:

Silicon ≤30 ppm ○

Note:

○ Standing for scale, □ standing for corrosion