Lennox XP25-024-230-01, Инструкция по установке и обслуживанию

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Page 17
XP25
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING
LIQUID AND SUCTION LINE SERVICE VALVES
OUTDOOR
UNIT
LIQUID LINE
SUCTION LINE
LIQUID LINE SERVICE
VALVE
SUCTION LINE
SERVICE VALVE
ATTACH
GAUGES
INDOOR
UNIT
SUCTION 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
Remove the valve core from the suction line to
provide an exit point for the nitrogen flow.
NITROGEN
HIGH LOW
B
A
C
PIPING PANEL REMOVAL AND LINE SET
PREPARATION
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 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 LINE SERVICE
VALVE
LINE SET SIZE IS SMALLER
THAN CONNECTION
Figure 9. Brazing Procedures