Flooded type water cooled screw chiller (PCB Control)
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outlet side.
4) The chilled water pipeline system must be provided with the soft connection, thermometer,
pressure gauge, water filter, electronic scale remover, check valve, target flow controller,
discharge valve, drain valve, stop valve, expansion tank, etc.
3) The water system must be fitted with the water pump with appropriate displacement and head, so
as to ensure normal water supply to the unit. The soft connection shall be used between the water
pump, unit and water system pipelines, and the bracket shall be provided to avoid stress on the
unit. Welding work for installation shall avoid damage to the unit.
(1) Determination of water pump flow:
Flow (m3/h) = (1.1 ~ 1.2) * Unit Cooling Capacity (kW)/5.8
(2) Determination of water pump head:
Head (m) = (Unit Resistance (see product parameters) + Resistance at Maximum End of
Pressure Drop (see product parameters) + Pipeline Resistance (length of the least favorable loop
pipe * 0.05) + Local Resistance (length of the least favorable loop pipe * 0.05 * 0.5)) * (1.1 ~ 1.2)
4)
The flow switch must be arranged on the drain pipe of the evaporator. The flow switch shall be
interlocked with the input contact in the control cabinet. Its installation requirements are as
follows:
(1) The flow switch shall be installed on the pipe vertically.
(2) The straight pipe section at each side of the flow switch shall have a length that is at least 5
times the pipe diameter; do not install it near the elbow, orifice plate or valve.
(3) The direction of the arrow on the flow switch must be consistent with the direction of water
flow.
(4) In order to prevent vibration of the flow switch, remove all air in the water system.
(5) Adjust the flow switch to keep it in open state when the flow is lower than the minimum flow
(the minimum flow is 70% of the design flow). When the water flow is satisfied, the flow
switch shall keep in closed state.
5)
The water filter must be installed before the water inlet pipeline of the unit, which shall be
provided with a 25-mesh screen. This will aid in preventing foreign material from entering and
