Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Instalační manuál stáhnout pdf (Strana 18)

18 VRF-SVN33A-EN

Refrigerant Piping

Installing Refrigerant Piping

Overview

1. Cut or extend field-supplied piping as needed. To extend pipes, braze or using flared pipe

connections (not supplied). Refer to “Pipe Cutting” p. 18, “Nitrogen Flushing While Brazing”

p. 19, and “Flared Pipe Connections” p. 19.)

2. Make sure that pipes are free of dirt, debris, and moisture, and do not leak. (Refer to “Leak

Testing Pipe Connections” p. 29).

3. Braze or use flared pipe connections to install piping. Refer to “Connecting Piping to the Mini

Outdoor Unit” p. 21).

Pipe Cutting

Required tools:

•Pipe cutter

•Reamer

• Pipe holder

1. Using a pipe cutter, cut the pipe so that the cut edge is at 90° to the side of the pipe.

2. Use a reamer to remove all burrs at the cut edge.

Examples of correctly and incorrectly cut pipes.

WARNING

Hazard of Explosion and Deadly Gases!

Failure to follow all proper safe refrigerant handling practices could result in death or serious

injury. Never solder, braze or weld on refrigerant lines or any unit components that are above

atmospheric pressure or where refrigerant may be present. Always remove refrigerant by

following the guidelines established by the EPA Federal Clean Air Act or other state or local

codes as appropriate. After refrigerant removal, use dry nitrogen to bring system back to

atmospheric pressure before opening system for repairs. Mixtures of refrigerants and air under

pressure may become combustible in the presence of an ignition source leading to an

explosion. Excessive heat from soldering, brazing or welding with refrigerant vapors present

can form highly toxic gases and extremely corrosive acids.

NOTICE:

System Component Damage!

Do not remove the seal caps from refrigerant connections, or open the service valves until

prepared to braze refrigerant lines to the connections. Excessive exposure to atmosphere (> 5

min.) may allow moisture or dirt to contaminate the system, damaging valve seals and causing

ice formation in system components.

Correct: 90º

Oblique

Rough

Burr

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Trane Variable Refrigerant Flow System Mini Outdoor Unit Series Instalační manuál Strana 18