2. Heat the suction angle valve joints using a heat gun for 10 minutes, and then
use two 30# adjustable wrenches to secure the angle valve nut and pipe nut
on the suction side, as shown by (2) in Figure 6-8, and use a 36# adjustable
wrench to loosen the adjustable nut until the pipe is separated from the angle
valve.
After removing the valve, seal the suction vent immediately to ensure that the
system is clean and that moisture does not enter the pipe.
3. Heat the discharge angle valve joints using a heat gun for 10 minutes, and
then use two 30# adjustable wrenches to secure the angle valve nut and pipe
nut on the discharge side, as shown by (3) in Figure 6-8, and use a 30#
adjustable wrench to loosen the active nut until the pipe is separated from
the angle valve nut. After removing the valve, seal the exhaust vent
immediately.
4. Use a 13# ratchet wrench (or solid wrench) to remove the two M8 screws
shown by (4) in Figure 6-8 below the compressor support.
5. Pull out the compressor and support, as shown by (5) in Figure 6-8.
Step 6 Use a 13# ratchet wrench (or solid wrench) to remove the three M8 bolts that
secure the compressor and support, and remove the compressor.
● Seal the screw thread joints in the pipe using sealant.
● After the installation, check that the input power cables of the compressor are
in the same phase sequence as those of the wiring terminals.
Step 7 Secure the new compressor to the support using a solid wrench, secure the
compressor support to the cabinet interior using a 13# socket wrench, and install
an electric heating belt in the cabinet.
Step 8 Apply red glue from the second to fourth circles of the inner screw threads of the
discharge angle valve. Use two 30# adjustable wrenches to secure the angle valve
nut and pipe nut on the discharge side, as shown by (3) in Figure 6-8, and use a
torque wrench to tighten the adjustable nut.
Installation of the suction angle valve is the same as that of the discharge angle
valve.
Step 9 Vacuumize the system and precharge refrigerant by following the instructions in
4.1 Vacuumization and Refrigerant Precharging.
Step 10 Connect the compressor cables, check that the phase sequence is correct and then
power on. Continue with charging refrigerant by following the procedure of
commissioning the compressor in section 4.4.4 Commissioning Procedure until
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 6 System Operation and Maintenance
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 233
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