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REFRIGERANT PIPES
Flaring
•
The main cause for refrigerant leakage is due to defects with the flaring work.
•
The installer must ensure that all piping used complies with both:
IMPORTANT
AS/NZS 1571:1995 - Copper - Seamless tubes for air conditioning and refrigeration.
AS/NZS 4041:2006 - Pressure piping.
•
All pipework and fittings should be thoroughly examined for cleanliness and suitability for
the system and refrigerant prior to assembling.
•
All unsealed tubing must be thoroughly inspected and, if necessary, cleaned before assembly
to remove any copper residue and/or scale particles such as dirt or metal.
•
Metal filings must not be left in pipework after cutting as they can cause damage compressor
(i.e. shaft seals, bearings, etc.).
•
Prior to assembly, refrigeration pipes must be clean and burr free. They must not be crushed
or kinked.
•
For flare connections, a suitable lubricant must be used between the back of the flare and the
nut to avoid tearing the flare when tightening the nut.
Connecting Vapour / Liquid Pipes To Indoor & Outdoor Units
1.
Align the centre of the pipes.
2.
Sufficiently tighten the flare nut with fingers, then tighten with a spanner and torque wrench.
To prevent heat loss and wet floors due to dripping of condensation, both pipes must be properly
insulated.
CAUTION
Metric
Ø 6.35 mm
Ø 9.52 mm
Ø 12.7 mm
Ø 15.88 mm
Indoor Unit
Ensure the joint nut is tightened firmly to avoid leakage.
Ensure that both the connections and the refrigerant pipes are wrapped with insulation material.
CAUTION
Rinnai
Pipe Dimensions (Ø)
Imperial
Ø 3/8"
Ø 1/2"
Ø 5/8"
Torque Wrench Setting
Ø 1/4"
Outdoor Unit
13
INSTALLATION
18 Nm
42 Nm
55 Nm
75 Nm
Vapour
pipe
Liquid
pipe
Split AC IM
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