Huawei NetCol8000-A013 User Manual page 120

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (600 mm Width)
Context
Tools: flat-head screwdriver, welding tool, refrigerant retrieval device (required
based on local conditions), nitrogen injection and pressure preservation tool,
vacuumization tool, and refrigerant injection tool.
Procedure
Step 1 Hold down
screen displayed.
Step 2 Open the front door, and turn off the indoor unit circuit breaker and circuit
breaker in the power distribution cabinet.
Step 3 Remove the return air filter.
Step 4 Reclaim the refrigerant.
Step 5 Pry the EEV coil off using a flat-head screwdriver, as shown in
Step 6 Weld the two ends of the EEV using a welding torch, as shown in
Then, remove the EEV.
Figure 5-8 Removing the EEV
Step 7 Weld a new EEV, and install the coil for the EEV.
Protect the surrounding components during the welding process.
Step 8 Inject nitrogen and preserve the pressure. After checking that the EEV and system
do not leak, perform vacuumization and inject refrigerant.
Step 9 Install the return air filter.
Issue 02 (2020-11-09)
on the home screen. Tap Yes on the shutdown confirmation
NO TICE
Copyright © Huawei Technologies Co., Ltd.
5 System Operation and Maintenance
Figure
Figure
5-8.
5-8.
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