506694-01
Issue 1720
Page 9 of 16
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
LIQUID LINE SERVICE VALVE
LIQUID LINE
BRAZE LINE SET
Wrap both service valves with a saturated cloth as illustrated here before brazing to line set.
SATURATED CLOTH
IMPORTANT —
Allow braze joint to cool. Apply
additional saturated cloths to help cool brazed joint.
Do not remove wet rag until piping has cooled.
Temperatures above 250ºF will damage valve seals.
6
SUCTION / VAPOR LINE
SATURATED CLOTH
SUCTION / VAPOR LINE
SERVICE VALVE
After all connections have been brazed, disconnect manifold gauge set from service ports. Apply saturated rags to both service valves to cool
piping. Once piping is cool, remove all wet cloths.
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
PREPARATION FOR NEXT STEP
7
WARNING
1.
FIRE, PERSONAL INJURY, OR PROPERTY
DAMAGE
will result if you do not wrap a wet cloth
around both liquid and suction line service valve
bodies and copper tube stub while brazing in the line
set! The braze, when complete, must be quenched
with water to absorb any residual heat.
2. Do not open service valves until refrigerant lines and
indoor coil have been leak-tested and evacuated.
Refer to procedures provided in this supplement.
WRAP SERVICE VALVES
To help protect service valve seals during brazing, wrap a saturated cloth around service valve bodies and copper tube stub. Use another
saturated cloth underneath the valve body to protect the base paint.
4
FLOW NITROGEN
Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and
out of the suction / vapor valve stem port. See steps
3A, 3B
and
3C
on manifold gauge set connections.
5
Figure 6B. Brazing Procedure (cont.)
