Daikin VRV Plus Series General Information Manual page 25

Si33-003.book Page 21 Monday, June 25, 2001 9:06 AM
SiE33-003
Brazing
a) Brazing work should be carried out such that the final result is directed either downwards or sideways.
b) Liquid and gas pipe branches should always be dealt with in the specified way with attention being paid
c) It is standard working practice to use the nitrogen replacement method when brazing.
Important points
1. Every effort must be made to avoid fire. (Clean area where brazing is to be performed and make sure
2. Be careful of burns.
3. Make sure that the gap between the pipe and the joint is correct. (To prevent leaks)
4. Is the pipe adequately supported?
Copper pipe support spacing
Maximum gap (m)
General Information
An upward direction should be avoided wherever possible. (to prevent leakage)
to the direction of the fitting and its angle. (to prevent oil return or drift) For example see page 119.
that fire fighting equipment and water are ready to hand.)
As a rule the gaps between supports for horizontal piping (copper pipe) are as follows:
Nominal diameter 20 or less
1.0
The copper pipe should not be secured directly by metal brackets.
(From HASS 107-1977)
25~40 50
1.5 2.0
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Installation
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