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15. Routing the refrigerant lines
The outdoor module is pre-filled with refrigerant R410A.
No additional filling is required for lines up to 12 m in length.
Minimum line length
: 3 m
Maximum line length
: 25 m
Max. height differential
Indoor to outdoor unit : 15 m
Line lengths between 12 and 25 m must be topped up with an additional 60 g/m
refrigerant R410A.
Height differentials
If the height differential between the indoor and the outdoor units is > 4 m,
both refrigerant lines will require oil riser elbows to prevent oil shortages in the
compressor.
Cooling mode
Heating mode
Suction line
(gaseous)
Injection line
(phase mixture)
Max. 4 m
Oil lift bend
(on site)
Liquid line (liquid)
Hot gas line
(gaseous)
Max. 4 m
Cooling
mode
Heating mode
Suction line
(gaseous)
Injection line
(phase mixture)
Max. 4 m
Oil lift bend
(on site)
Liquid line (liquid)
Hot gas line
(gaseous)
Max. 4 m
Outdoor module higher than indoor module
Indoor module higher than outdoor module