7 | Piping installation
Installer reference guide
33
RXTJ-A_RXTA-C_RXTM-A_RXTP-A
R32 split series
4P728168-1 – 2023.03
7.2.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the indoor unit
▪ Connecting the refrigerant piping to the outdoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
- Pipe bending
- Flaring pipe ends
- Using the stop valves
7.2.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪ "2General safety precautions"[47]
▪ "7.1Preparing refrigerant piping"[431]
DANGER: RISK OF BURNING/SCALDING
NOTICE
▪ Use the flare nut fixed to the unit.
▪ To prevent gas leakage, apply refrigeration oil ONLY to the inside of the flare. Use
refrigeration oil for R32 (FW68DA).
▪ Do NOT reuse joints.
NOTICE
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material
may dissolve and damage the system.
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