Freeze Protection In Winter - Gree LSQWRF35VM/NaA-M Service Manual

(1) Cut off the power supply.
(2) Clean with high-pressure air fins against the direction of the inlet air, or clean with high-pressure
water fins at the direction upright with that of the fins but care must be taken to control the water
pressure to prevent the fins from being pulled down and protect each electric element. If fins stick
with oily matters, clean fins with neutral detergent solution.
(3) The vacuum cleaner and nylon brush also can be used to remove dust and foreign matters on the
surface of the heat exchanger.

4.7.2 Freeze protection in winter

When the unit is not going to be used for a long time, clean and dry the internal and external surfaces
of the unit, and then it would be better to wrap it. Under the subzero climate, the unused unit should be
drained completely so that the shell-and-tube evaporator would not be frozen up. Instead, the other way is
adding some antifreeze into water to keep the water temperature no less than 0°C.
See the following steps for how to drain water out.
(1) Loosen screws on the front panel and then remove the front panel
(2) Draw out the blind plug counter clockwise to let the chilled water flow out freely until no water stays
in. After that, place the blind plug back. (Note: put the container for foul water beneath the drain
pipe to prevent foul water from polluting the site).
Unit Installation
115