42
Multi V W
all-Mounted Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
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Figure 32: Using Nitrogen Gas During Brazing
Auxiliary
Valve
Tape
(no air bubbles)
Do not block outlet side.
When pressure inside pipe
is above atmospheric pressure,
pinhole leaks can occur.
Refrigerant Pipe
Welding Point
Regulator
Nitrogen gas
3.0 psi or less
Nitrogen
Gas
Tank
Brazing
Note:
•
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installer using best practices and utmost care while assembling the piping system.
• Store pipe stock in a dry place and keep stored pipe capped and clean.
•
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• Use adapters to assemble different sizes of pipe.
•
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• Use a tubing cutter;
do not use a saw to cut pipe. De-bur and clean all cuts before assembly.
3. Brazing joints:
•
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•
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•
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heat barrier spray.
Refrigerant Safety
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Buildings with twenty-four (24) hour occupancy allow half of that concentration.
1
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Also consult state and local codes in regards to refriger-
ant safety.
WARNING
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REFRIGERANT PIPING