Huawei NetCol5000-A050 User Manual page 185

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual (1350 mm Depth)
Procedure
Reclaim or dispose of the refrigerant in accordance with local laws and
regulations. Do not discharge the refrigerant to the atmosphere. During the
reclaim process, the R410A refrigerant composition may change. Therefore, you
are not advised to refill the reclaimed R410A refrigerant to the cooling system.
Step 1 Open the rear door and remove the air filter.
Step 2 Tap Shutdown on the home screen of the indoor unit display module, and turn
off the active power switch QF1, standby power switch QF2, and drive switch QF3.
Exercise caution because the device is still energized after it is shut down on the
home screen of the display module.
Step 3 Reclaim the refrigerant and ensure that the system has no pressure.
1.
2.
Step 4 Remove the filter dryer.
1.
2.
Issue 04 (2022-12-15)
pressure gauge, rubber hose, protective gloves, two 27# adjustable wrenches,
one 36# wrench
NO TICE
NO TICE
Connect the refrigerant reclaiming pump to the outdoor unit needle valve and
(if a low temperature component is deployed) the needle valve at the outdoor
unit liquid pipe port of the low temperature component. When the pressure
decreases to the atmospheric pressure and becomes stable, shut down the
refrigerant reclaiming pump.
Connect the refrigerant reclaiming pump to the low-pressure needle valve of
the indoor unit. When the pressure decreases to the atmospheric pressure and
becomes stable, shut down the refrigerant reclaiming pump. Ensure that there
is no pressure in the system and the refrigerant is completely reclaimed.
Remove the hold hoop from the filter dryer using a Phillips screwdriver.
Heat the thread connection position of the adjustable nut using a heat gun
for 10 minutes. Use two 27# adjustable wrenches to secure the filter dryer nut
and pipe nut, and use a 36# adjustable wrench to loosen the adjustable nut
until the pipe is separated from the filter dryer. Immediately seal the pipe
opening after removal to keep the system clean and prevent water from
entering the system.
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