21
Tubing
4.5.3 Tubing Connections
Indoor coils have only a holding charge of
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connections are to be made.
• Use type “L” copper refrigeration tubing. Braze
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– copper to copper, 5% silver minimum
– copper to steel or brass, 15% silver minimum
• Be certain both refrigerant shutoff valves at the
outdoor unit are closed.
• Remove the caps and Schrader cores from the
pressure ports to protect seals from heat damage.
Both the Schrader valves and the service valves
have seals that may be damaged by excessive heat.
• Clean the inside of the fittings and outside of the
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out debris, chips, dirt, etc., that enters tubing or
service valve connections.
•
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compound before applying heat.
•
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nitrogen regulator should be turned off to avoid
pressuring the system.
• A
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to cool the joint.
• Reinstall the Schrader cores into both pressure
ports.
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undesirable heat transfer resulting in capacity
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4.0 INSTALLATION
4.5 Line Set Installation (cont.)
