Gree D Série Guide D'utilisation page 12

(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. If necessary, a water tank will be installed.
Note: never use salt mixture to prevent the unit from being corroded.
How to drain the water system
(1) Loosen screws around the panel and then take down it.
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D Series Modular Air-cooled Scroll Chillers Owner's Manual
8
Steam current Switch