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Refrigerant Piping - Brazing Procedures
1
CUT AND DEBUR
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.
CUT AND DEBUR
COPPER TUBE
REDUCER
3
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND VAPOR LINE SERVICE VALVES
Flow regulated nitrogen (at 1 to 2 psig) through the low-side refrigeration gauge set into the liquid line service port valve, and out of the
vapor line service port valve.
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 - Remove core from valve in vapor line
service port to allow nitrogen to escape.
VAPOR SERVICE PORT MUST BE OPEN
TO ALLOW EXIT POINT FOR NITROGEN
INDOOR
UNIT
31-5000750 Rev. 1
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
SERVICE VALVE
CONNECTION
STUB
LINE SET SIZE IS SMALLER
THAN CONNECTION
REFRIGERANT LINE
C
VAPOR LINE
LIQUID LINE SERVICE
LIQUID LINE
NOTE
WARNING
2
CAP AND CORE REMOVAL
Remove service cap and core from
both the vapor and liquid line service
ports.
SERVICE PORT
CAP
SERVICE
PORT
CORE
LIQUID LINE SERVICE
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
LOW
HIGH
ATTACH
GAUGES
B
VAPOR LINE
SERVICE
VALVE
OUTDOOR
UNIT
A
WHEN BRAZING LINE SET TO
VALVE
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
VAPOR LINE SERVICE
VALVE
VALVE
USE REGULATOR TO FLOW
NITROGEN AT 1 TO 2 PSIG.
NITROGEN
WARNING
SERVICE
PORT
CORE
SERVICE
PORT CAP
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