Cutting The Refrigerant Piping / Brazing Procedure - LG MULTI V HYDRO KIT ARNH963K2A4 Installation Manual

Medium temperature

Table of Contents

Cutting the Refrigerant Piping

Cut the pipe to length.

• Measure the distance between the indoor unit and the outdoor unit.

• Cut the pipes a little longer than measured distance.

Remove the burrs.

• Completely remove all burrs from pipe ends.

• When removing burrs, point the end of the copper pipe down to

avoid introducing foreign materials in the pipe.

Brazing Procedure

One of the main causes of refrigerant leaks is a defective connection. Hydro Kits have brazed connections.

WARNING

Do not braze in an enclosed location.

before and after brazing.

If the refrigerant combusts, it generates a toxic gas the will cause physical injury or death.

• During installation, it is imperative to keep the piping system free of contaminants and debris such as copper burrs, slag, or carbon dust.

•

Do not use kinked pipe caused by excessive bending in one specific area on its length.

1. Multi V refrigeration system components contain very small capillary tubes, small orifices,

electronic expansion valves, oil separators, and heat exchangers that can easily become

blocked. Proper system operation depends on the installer using best practices and

utmost care while assembling the piping system.

2. Store pipe stock in a dry place; keep stored pipe capped and clean.

3. Blow clean all pipe sections with dry nitrogen prior to assembly.

4. Use adapters to assemble different sizes of pipe.

5. Always use a non-oxidizing material for brazing.

oxidized film will accumulate and clog or damage the compressors. Flux can harm the copper piping or refrigerant oil.

6. Use a tubing cutter,

do not use a saw to cut pipe. De-bur and clean all cuts before assembly.

7. Brazing joints:

• Use a dry nitrogen purge operating at a minimum pressure of three (3) psig and maintain a steady flow.

• Use a 15% silver phosphorous copper brazing alloy to avoid overheating and produce good flow.

• Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or

heat barrier spray.

WARNING

•

physical injury or death.

•

injury or death.

INSTALLING THE REFRIGERANT PIPING