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16. Connecting the refrigerant lines
to the outdoor module
Fig.: Example of a flanging tool
Only use copper pipes which are approved for refrigerant R410A (for nominal
diameter, see "Specification" chapter).
Suction gas lines and liquid lines must have separate thermal insulation. Closed cell,
diffusion-proof thermal insulation, min. thickness 6 mm
Do not allow any contaminants (e.g. metal swarf or moisture) to enter the
copper pipes.
Remove the union nuts of the outdoor unit from connections
C
(liquid line) and
D
(hot gas line) of the refrigerant lines.
Replace nuts with the union nuts supplied (indoor unit) (5/8 UNF for liquid line,
7/8 UNF for hot gas line).
Flare the pipe ends
Tighten the nuts
Tighten nuts with the following torque:
Line
Connection to outdoor unit
Torque in Nm
Liquid line Ø 10 mm
5/8 UNF
37 +/- 4
Hot gas line Ø 16 mm
7/8 UNF
70 +/- 7
Connecting the refrigerant line to
the outdoor module
Uneven
thickness
CORRECT
Not level
Cracks
Cracks
Shape of flare
C
D
Euro flanged adaptor connection kit
Alternatively, the refrigerant lines can also be connected using the Euro flanged
adapter connection kit for hard-soldering on refrigerant lines (available from the Wolf
range of accessories).