Haier CA0130EAND [21/42] Caution

CAUTION

■ The bypass pipes and stop valves of water inlet and outlet pipelines shown in the above diagram must be

installed to facilitate cleaning of other systems outside of the water pipeline prior to the unit commissioning.

During maintenance, the water pipelines of the heat exchanger may be cut off without interference to other heat

exchangers.

■ During unit operation, the actual operating capacity of the water system is less than the minimum water capacity

required, resulting in frequent alarm and shutdown of the unit.

■ The effective water capacity of the running water system includes the total capacity of the water main,

water tank, 2-way valve normally-open end which are involved in water circulation in the water system.

■ The actual effective water capacity (V) of the running water system must be more than or equal to Vmin.,

otherwise the unit may be subject to frequent alarm or shutdown!

■ Overall Nozzle Dimensions during Module Combination

(Maximum 16 modules combined)

Number of

modules

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Dverall nozzle

dimensions (mm)

65 80 100 125 150 200 250

■ Calculations of Water System Inventory

Model of unit Preset return water temperature (°C) Minimum effective water capacity Vmin. (I)

CA0070EAND 12 210

CA0130EAND 24 420

Calculation example of water system capacity

Assume that one wr system is paterovided with two sets of LSQWRF65/R2A units, and the preset return water

temperature is 12°C. The diameter of water main is DN65, and the total length of water inlet & outlet pipelines is

80m. Eight end fan coils are normally open. The internal capacity is 2L.

Calculations:

Capacity of inlet & outlet water mains = 3.14 x {(65/2)/1000}2 X 80 X 103 = 265L

Water capacity of end fan coil = 10 x 2 = 20L

The above table indicates that the required minimum capacity of the water system Vmin.=310L

To avoid frequent startup, shutdown and alarm of the unit, the capacity of water tank must be more than or equal

to Vmin.=310-265-20=25L