MS-SVN15B-EN
15
Connection of Refrigerant Tubing
5.
Insulate the entire gas line.
6.
Do not allow uninsulated liquid line to come in direct contact with bare gas line.
7.
Precautions should be taken to avoid heat damage to the pressure tap valve core during
brazing. It is recommended that a wet rag be wrapped around the valve body.
8.
It is recommended to use braze shield, soak pad in water and place over suction and liquid
lines to protect unit finish.
9.
To braze the copper tube, before brazing a copper tube to a solder coupling or a copper tube
to an expanded tube, do not forget to keep them tight as shown in Figure 21, 22.
10. Use a dry nitrogen purge and brazing alloy without flux when brazing the field line to the
copper factory connection. Flow -dry nitrogen into either valve pressure tap port, through the
tubing and out the other port while brazing.
11. Braze using accepted good brazing techniques.
Figure 11.
Figure 12.
Braze
coupling
CO
MM
ET
3
To rc h
Copper tube
from indoor
unit
Braze rod
Copper tube from
outdoor unit
Braze
coupling
CO
MM
ET
3
To rc h
Copper tube
from indoor
unit
Braze rod
Copper tube from
outdoor unit
