NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2014-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
44
Procedure
Step 1
Connect humidifier water supply by referring to
Figure 3-2
, and seal thread connection points
using waterproof sealant.
Cut off cable ties on the water inlet hoses to the humidifier using diagonal pliers, pull the
connectors of the pipes to the bottom of the equipment, and install the rigid pipes and
their connectors. You are advised to wrap pipes out of the equipment with thermal
insulation foam.
Cut off bind straps on the water inlet hoses to the humidifier using diagonal pliers, pull
the connectors of the pipes to the bottom of the equipment, and install the hoses and their
connectors. You are advised to wrap pipes out of the equipment with thermal insulation
foam.
Step 2
Connect drainpipe by referring to
Figure 3-3
, and seal thread connection points with
waterproof sealant.
Remove the drainpipe plug on one end, install a hose (hose length depending on the
operating environment) and fix the hose using a hose clamp at the connecting point. Take
out the connector in the fitting bag, install the connector to the other end of the hose, and
fix the connector using another hose clamp. Connect a rigid pipe to the connector. You
are advised to wrap pipes out of the equipment using thermal insulation foam.
Remove the drainpipe plug on one end, install a hose and fix the hose using a hose clamp.
You are advised to wrap pipes out of the equipment using thermal insulation foam.
----End
3.7.3 Leak Checking
Context
The measuring range of the pressure gauges must be larger than 4.0 MPa. The pipelines
can withstand pressure of more than 4.0 MPa.
Do not remove the pipelines and pressure gauges when retaining pressure to avoid gas
leakage.
Charge nitrogen using the low-pressure and high-pressure needle valves as shown in
Figure
3-22
. You are advised to charge nitrogen using the liquid, low-pressure, and high-pressure
valves as shown in
Figure 3-22
, when the outdoor unit is disconnected.
Procedure
Step 1
Connect the pressure gauge, pipeline, and nitrogen steel vessel.
Step 2
Charge in nitrogen about 4.0 MPa to the steel vessel and remain the pressure for 24 hours.
The system pressure should not decrease before and after nitrogen is charged in and remained
for 24 hours at the same environment temperature. If the pressure decreases due to
temperature changes, repeat preceding operations.
