Figure 4-76 Cable routing of the third indoor unit
4.2.6.9 Vacuumization
Prerequisites
● Check that all pipe connectors are correct, and the refrigerant pipe tilts and
has supports.
● All pipes have been checked for leaks, and all pipes are not bent by a large
angle.
● Check that the hose clamps and cable ties of the drainpipe are secured. Water
pipe joints have been sealed by sealant.
● The refrigerant pipe and water pipe are wrapped with thermal insulation
foam.
● Check that all nitrogen has been exhausted from the indoor unit.
● Ensure that stop valves for the gas pipe and liquid pipe of the indoor unit are
open.
● Verify that stop valves for the gas pipe and liquid pipe of the outdoor unit are
closed.
Context
Tools: pressure gauge (measuring range ≥ 4.0 MPa), rubber hose (withstanding a
pressure of at least 4.5 MPa), vacuum pump.
Procedure
Step 1 Connect the pressure gauge and vacuum pump and check that the pressure gauge
valves are all open.
FusionModule800 Smart Small Data Center
User Manual 4 Installation Guide
Issue 01 (2021-02-05) Copyright © Huawei Technologies Co., Ltd. 155
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