Piping And Insulation; Installation Of The Water System - Gree A Series Service Manual

5.4.6.2 Placement of the Main Unit
(1)Place the unit on the foundation.
(2)There should be no clearance between the foundation and the baseboard of the unit.
(3)Lift the unit, put the rubber pad on the foundation and then place the unit on the rubber
pad.
After that, be sure the horizontal slope of the unit can't exceed 1/1000. If so, take an ad-
justment by stuffing spacers into the clearance between the foundation and the baseboard
of the unit until the slope is satisfactory.
5.5

Piping and Insulation

5.5.1

Installation of the Water System

■ Considerations stated below shall be taken carfelly for the water system.
(1)Each water inlet and outlet should be labeled properly to avoid misconnection.
(2)A flexible connector should be used at the chilled water outlet to reduce vibration
transmission.
(3)A manometer, a thermometer and a gate valve shall be installed at the chilled water inlet
/outlet. Moreover, a drain valve shall be installed at the outlet and an air release valve shall
be installed at the inlet. At the highest point of the water system, another release valve
shall be installed, while at the lowest point of the water system, another drain valve shall
be installed to facilitate drainage.
(4)The water inlet/outlet pipe should be tightly insulated to reduce heat loss and dewing.
When pipes are exposed under 0℃, a electric heater shall be installed.
(5)There surely be some foreign matters in the water system which would generate scale on
the surface of the heat exchanger, so a filter shall be installed upstream of the water
pump.
(6)The unit shall be bypassed during flushing to prevent drain out from entering the system.
(7)Under ultra-low temperature in winter, showdown at night will cause the evaporator and
pipeline frozen up, so it is highly recommended to add alcohol and propanol mixture in
chilled water. Do not cut off the power supply when the unit is turned off, otherwise the
freeze protection does not work. Alternatively, cut off the power supply and drain the water
system thoroughly.
(8)When the unit runs under the low load requirement, in order to avoid low load protection
which would affect the service life of the unit, make sure the water capacity is more than 1/
A Series Modular-type Air-cooled (Heat Pump) Chiller
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