Huawei NetCol5000-A050 - Welding Indoor Unit Pipes

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4.8.2 Welding Indoor Unit Pipes

Precautions

Table 4-17 Recommended pipe specications

Pipe Length (m) Recommende

d Gas Pipe

Diameter

Recomme

nded Wall

Thickness

Recommen

ded Liquid

Pipe

Diameter

Recommende

d Wall

Thickness

L ≤ 60 m 7/8 inch 1.2 mm 5/8 inch 1.0 mm

60 m < L ≤ 100 m 7/8 inch 1.2 mm 3/4 inch 1.0 mm

If the one-way pipe length is longer than 100 m, contact Huawei technical

support.

Exhausting Nitrogen

Step 1 Remove the bonnet of the low-pressure needle valve and connect the pressure

gauge leather hose to the needle valve.

Figure 4-61 Exhausting nitrogen

(1) Low-pressure needle valve

(2) Exhaust pipe needle valve (3) Liquid pipe needle valve

Step 2 Open the pressure gauge valve. Loud noises of air ow are generated at rst and

then disappear gradually.

Step 3 After the

airow noise disappears, remove the rubber hose and install the valve

bonnet.

Step 4 Continue exhausting nitrogen from the exhaust pipe needle valve and liquid pipe

needle valve by performing Step 1 to Step 3.

----End

NetCol5000-A050 In-row Air Cooled Smart Cooling

Product

User Manual 4 Installation

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