Flooded type water cooled screw chiller (PCB Control)
MCAC-CTSM-2012-11
21
10) In close loop water system, to diminish the impact on water pipe because of the expansion or
contraction of water volume and to avoid the influence caused by supplementing water
pressure, water return side should be fitted with an expansion water tank
.
The expansion tank
shall be installed 1~1.5m higher than the system, and its capacity accounts about 1/10 of the
water amount in the whole system.
11) The
drain connection
is arranged on the evaporator cylinder. The drain outlet has been
equipped with a 1/2’’ plug.
12) In order to expel the air from water system, install
an automatic discharge valve
on the highest
place of local water pipe and the horizontal pipe should be up tilted for about 1/250 degree.
13) The
thermometer and pressure gauge
are arranged on the straight pipe sections of the water
inlet pipeline and drain pipeline, and their installation places shall be far away from the elbows.
The pressure gauge installed shall be vertical to the water pipe, and the installation of the
thermometer shall ensure that its temperature probe can be inserted into the water pipe directly.
14) Each low point shall be fitted with
a drain connection
so as to drain the remaining water in the
system. Before operating the unit, connect the stop valves to the drain pipeline, respectively
near the water inlet connection and drain connection.
The by-pass pipeline
shall be provided
between the water inlet pipe and drain pipe of the evaporator, convenient for cleaning and
maintenance. Use of flexible connections can reduce vibration transfer.
15) The chilled water pipeline and expansion tank shall be subjected to insulation treatment, and
the maintenance and operation part shall be reserved on the valve connections.
16) After the air-tightness test is carried out, and the
insulation layer
is applied on the pipeline, so
as to avoid heat transfer and surface condensation; the insulation layer shall be covered by