Routing The Refrigerant Lines - Wolf BWL-1S-05 Installation And Operating Instructions Manual

14 Routing the refrigerant lines
The outdoor module is pre-charged with refrigerant R410A.
No additional charge is required for lines up to 12 m in length.
Minimum line length 3 m, maximum line length 25 m.
Max. height differential between indoor and outdoor unit 15 m.
For 12 – 25 m line length, top up with 60 g/m of refrigerant R410A.
Use only copper pipes suitable for refrigerants to EN-12735-1, and thermal insulation with a temperature resistance
of up to 120 °C. (For internal 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.
Extended refrigerant lines are not permitted for outdoor use. Junctions must remain accessible for leak testing,
as they are potential leak sources.
Risk of injury from incorrectly routed pipework
Route pipework in such a way as to avoid any danger to persons.
Before routing pipework, please note:
− Where pipework is routed via ducts with other supply lines, for example, hot flue pipes, a reciprocal
effect can result. Insulate supply lines where necessary.
− Do not route pipework through lift shafts.
− In public stairways and passageways, route pipework at a minimum height of 2.20 m.
− Pipework routed through fire-resistant walls and ceilings must have fireproof seals.
− Protect pipework from excessive stress.
− Protect pipework from environmental influences, such as dirt, waste, and water.
Damage from impurities in the refrigerant circuit
Please
Moisture or dirt, for example metal swarf, can get into the refrigerant circuit.
note
− Never reuse refrigerant lines.
− Use only closed refrigerant lines.
− Pipes in wall ducts must be plugged.
Pipework damaged by kinking
Please
Copper pipes kink easily and can then no longer be used.
note
− Never step on copper pipes.
− Always choose an adequately large bending radius; use a pipe bender.
− Install pipe supports every 2 m.
− Use protective piping for ground routing.
Structural damage from condensate
Please
Where pipework is not insulated or its thermal insulation is damaged, condensate forms.
note
− Thermally insulate all pipework.
− Check that the pipework is fully insulated and that all junctions are lagged with insulating tape.
− Lag damaged thermal insulation using insulating tape (accessory).
− Seal wall ducts on site.
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Routing the refrigerant lines
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