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Piping installation
Installer and user reference guide
90
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
a
Correct heating zone
b
Heating zone is too large. Brazing material can cause obstructions inside the piping.
A running test might detect these obstructions.
c
Heating zone is too small. The brazed connection will not be strong and might rip.
a
c
b
5 mm
80~85
˚
3 mm
a
Correct distance and direction of flame during preheating.
b
Correct distance and direction of flame during brazing.
c
Incorrect distance and direction of flame. Beware of burning holes in the piping or
not heating the piping enough.
a
b
a
Direct the flame to the center of the piping to heat the piping equally.
b
If you do not direct the flame to the center of the piping, the piping will not be
heated equally.
a
a
Correct brazing can be done when the piping is heated until its color turns red-
black/pink.
Adding brazing material
a
a
a
a
a
Brazing rod
