J&E Hall JCC2, Техническое руководство

Страница: 9 / 26

Issue: 01.02.2016 Page 9
Installation
Field piping
To ensure satisfactory operation and performance, the following points should be noted for field piping
arrangements:

Pipework routes must be as simple and as short as possible.

Avoid low points on pipework where oil can accumulate.

Use only clean, dehydrated refrigeration grade copper tube with long radius bends.

When brazing use only silver alloy rods.

Run braze without over filling to ensure there is no leakage into the tube.

To prevent oxidization, blow oxygen free nitrogen through pipework when brazing.

Protect the casing of the unit when brazing connections.

Install insulation with a minimum wall thickness of 3/8” on both liquid and suction lines.

Adequately support all pipe work at a maximum of 2 metre intervals.
Use of incorrect pipe sizes can affect system pressures/temperatures and gas velocity for proper oil return.
Important Note:
One of the main factors affecting equipment reliability and compressor service life is refrigeration
circuit contamination. During installation, circuit contamination can be caused by:

Brazing & Welding Oxides

Filings & Particles from de-burring pipework

Brazing Flux

Moisture & Air
Important Note:
Pipe sizes and maximum lengths/heights should be strictly as per the information given on page 4. All
local codes of practice must be observed in the installation of refrigerant piping