STEP 2 −− REFRIGERANT PIPING −− Brazing Procedures
1PIPING PANEL REMOVAL / PREPARING LINE SET 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.
CUT AND DEBUR
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
SERVICE VALVE
CONNECTION
COPPER TUBE
STUB
REDUCER
LINE SET SIZE IS SMALLER
THAN CONNECTION
REFRIGERANT LINE
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
2CAP AND CORE REMOVAL
Remove service cap and core from both the suction / vapor and liquid line service ports.
SERVICE PORT CAP
SERVICE PORT
CORE
LIQUID LINE SERVICE VALVE
SERVICE PORT
CORE
SERVICE
PORT CAP
SUCTION / VAPOR LINE
SERVICE VALVE
3ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND SUCTION / VAPOR LINE SERVICE VALVES
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.
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| LOW |
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| ATTACH |
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| GAUGES |
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SUCTION / VAPOR SERVICE PORT MUST BE |
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OPEN AND SERVICE PORT CORE REMOVED | C | SUCTION / |
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TO ALLOW EXIT POINT FOR NITROGEN FLOW |
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VAPOR LINE |
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| SERVICE |
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SUCTION / VAPOR |
| VALVE |
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LINE |
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INDOOR |
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UNIT |
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LIQUID LINE | LIQUID LINE SERVICE | A | |
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VALVE
HIGH
B
OUTDOOR
UNIT
NITROGEN
FIGURE 7
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