Installation Of The Water System - Gree A Series Installation, Start-Up And Maintenance Manual

A Series Inverter Modular Air-cooled Chiller (Heat Pump)
(1)Be sure the planeness of the concrete foundation is within ±3mm and the foundation
shall be covered by a rubber pad.
(2)Lift the unit until to the height where it is available to install the spring shock absorber.
(3)Remove screws fixing the spring shock absorber.
(4)Place the unit on the spring shock absorber and align the bolt holes of the spring shock
absorber with the mounting holes on the base of the unit.
(5)Tighten screws removed in step 2.
(6)Adjust the height of the spring shock absorber and make sure the deflection is equal all
round the spring shock absorber.
(7)Tighten the locking screws.
5.6

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 1/6 of total rated flow rate per hour of each module (for instance, for
some project with four modularized LSQWRF60VM/Na-M units, if the rated water flow
of each unit is 10.3m
larger than 10.3*4*1/6=6.87m
is required; otherwise the service life of the unit would be affected.
3 /h, then the required capacity of the whole project should be
3 /h). When the water course is quite short, a water tank
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