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506586−01 10/10
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING
LIQUID AND SUCTION / VAPOR LINE SERVICE VALVES
OUTDOOR
UNIT
LIQUID LINE
SUCTION / VAPOR
LINE
LIQUID LINE SERVICE
VALVE
SUCTION /
VAPOR LINE
SERVICE
VALVE
ATTACH
GAUGES
INDOOR
UNIT
SUCTION / VAPOR SERVICE PORT MUST BE
OPEN AND SERVICE PORT CORE REMOVED
TO ALLOW EXIT POINT FOR NITROGEN FLOW
A Connect gauge set low pressure side to liquid line
service valve (service port).
B Connect gauge set center port to bottle of nitrogen with
regulator.
C With valve core removed from the suction / vapor line
service port, nitrogen flow will have an exit point.
NITROGEN
HIGHLOW
B
A
C
PIPING PANEL REMOVAL AND PREPARING LINE
SET
CAP AND CORE REMOVAL
Remove piping panel for easier access to service valves. Cut ends
of the refrigerant lines square (free from nicks or dents) and debur
the ends. The pipe must remain round. Do not crimp end of the line.
Remove service cap and core from both the suction / vapor and
liquid line service ports.
1
2
LIQUID LINE SERVICE VALVE
SERVICE PORT
CORE
SERVICE PORT CAP
SERVICE PORT
CORE
SERVICE
PORT CAP
CUT AND DEBUR
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
COPPER TUBE
STUB
SERVICE VALVE
CONNECTION
REFRIGERANT LINE
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
REDUCER
3
SUCTION / VAPOR LINE
SERVICE VALVE
LINE SET SIZE IS SMALLER
THAN CONNECTION
Figure 9. Brazing Procedures