R32
Split Type - Air Source Heat Pump 20220105
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2. Refrigerant Pipework
2.1 Permitted Piping Length and Level Difference
The piping length and level difference limitations that apply are summarized. Before installation, it is
necessary to check if the piping length and height difference are meeting the requirements.
Permitted Piping Length and Level Difference
Models
4-16kW
Max. piping length
50m
Max. height difference when outdoor unit is upside
20m
Max. height difference when outdoor unit is downside
20m
Connect method
The largest level difference between indoor unit and outdoor unit should not exceed 20m. Additionally: If the
outdoor unit is above and the level difference is greater than 20m, it is recommended that an oil return bend with
dimensions as specified in Figure is set every 5m in the gas pipe of the main pipe;.
