Temperatur
e (ºC)
Saturation
Pressure –
Gauge
Pressure
(MPa)
Temperatu
re (ºC)
Saturation
Pressure –
Gauge
Pressure
(MPa)
Temperatu
re (ºC)
Saturatio
n
Pressure –
Gauge
Pressure
(MPa)
13
1.09
32
1.89
51
3.04
14
1.12
33
1.94
52
3.11
15
1.16
34
1.99
53
3.19
16
1.19
35
2.04
54
3.26
17
1.23
36
2.1
55
3.34
18
1.27
37
2.15
–
–
12.15.3 Leakage Test with Nitrogen for Refrigerant Pipes
Prerequisites
NO TICE
● Refrigerant pipes have been welded.
● All needle valve plugs must be available.
● The measuring range of a pressure gauge must be at least 4.0 MPa, and the
rubber hose must withstand a pressure of at least 4.5 MPa.
● Only nitrogen can be used for pressure preservation and leakage detection.
● During pressure preservation, do not remove the rubber hoses and pressure
gauges; otherwise, nitrogen may leak.
● When the outdoor unit is connected to an air-cooled outdoor unit or water-
cooled module, the nitrogen injection and pressure preservation operations on
the refrigerant side are the same.
Procedure
Step 1 Inject nitrogen from the low-pressure needle valve and liquid pipe needle valve at
the same time.
FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
12 Component Replacement
Issue 03 (2021-04-20) Copyright © Huawei Digital Power Technologies Co., Ltd.
181
