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Piping installation
Installer reference guide
35
2(A)MXM40+50 + 2(A)MXF40+50
R32 Split series
4P600463-3D – 2021.03
7.2 Connecting the refrigerant piping
CAUTION
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No brazing or welding on site for units with R32 refrigerant charge during
shipment.
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During installation of the refrigeration system, joining of parts with at least one
part charged shall be performed taking into account the following requirements:
inside occupied spaces non permanent joints are not allowed for R32 refrigerant
except for site made joints directly connecting the indoor unit to piping. Site
made joints directly connecting piping to indoor units shall be of non permanent
type.
CAUTION
Do NOT connect the embedded branch piping and the outdoor unit when only
carrying out piping work without connecting the indoor unit in order to add another
indoor unit later.
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:
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Connecting the refrigerant piping to the indoor unit
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Connecting the refrigerant piping to the outdoor unit
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Insulating the refrigerant piping
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Keeping in mind the guidelines for:
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Pipe bending
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Flaring pipe ends
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Using the stop valves
7.2.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
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"2 General safety precautions"
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"7.1 Preparing refrigerant piping"
DANGER: RISK OF BURNING/SCALDING
CAUTION
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Do NOT use mineral oil on flared part.
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Do NOT reuse piping from previous installations.
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NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material
may dissolve and damage the system.
