Precharging Refrigerant; Refrigerant Charge Amount Requirements; Vacuumizing - Huawei NetCol8000-E220 User Manual

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Step 17 Tap Start on the home screen, choose Maintenance > Diagnostic Mode > Enter,
and continue to charge refrigerant until the optimal value is reached based on the
current pressure and temperature. After the remaining refrigerant is added, exit
the diagnostic mode.
Step 18 Ensure that the unit is running properly without alarms.
----End

10.4.2 Precharging Refrigerant

During the commissioning of the smart cooling product, ensure that no comburent
substance (such as air or additive) enters the smart cooling product system. The
supplier is not liable for any risks and losses caused due to violation.

10.4.2.1 Refrigerant Charge Amount Requirements

The NetCol8000-E220 has dual compressor systems. The following table uses one
system as an example.
Table 10-1 Refrigerant charge amount
Model
Total charge
amount

10.4.2.2 Vacuumizing

Prerequisites
● The NetCol8000-E220 has dual compressor systems. Vacuumize the systems
one by one or at the same time. The following figure uses one system as an
example.
● Before vacuumizing, check that the refrigerant pipe system has passed the air
tightness test and does not leak.
● Before vacuumizing, ensure that all connectors on the device are tightened.
● System high pressure may occur if the system is not vacuumed or is not
thoroughly vacuumed. Therefore, ensure that the system is thoroughly
vacuumed.
Issue 10 (2024-01-30)
CA UTION
NetCol8000-
E220DM0AA
4.7 kg (single
compressor system)
NO TICE
Copyright © Huawei Digital Power Technologies Co., Ltd.
10 Parts Replacement
NetCol8000-E220DM0BA
8 kg (single compressor
system)
152