Page 15
XP21 SERIES
STEP 5 -- REFRIGERANT PIPING -- Brazing Procedures
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING
LIQUID AND VAPOR LINE SERVICE VALVES
OUTDOOR
UNIT
LIQUID LINE
VAPOR LINE
LIQUID LINE SERVICE
VALVE
VAPOR LINE
SERVICE
VALVE
ATTACH
GAUGES
INDOOR
UNIT
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 vapor line service port, nitrogen flow will have an exit point.
NITROGEN
HIGH
LOW
B
A
C
PIPING PANEL REMOVAL / PREPARING LINE SET
CAP AND CORE REMOVAL
Remove piping panel to access 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 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
VAPOR LINE SERVICE
VALVE
LINE SET SIZE IS SMALLER
THAN CONNECTION
FIGURE 14
