Pipework connections

Piping length between the outdoor and indoor units should be 1m or more in order to decrease vibration propagated from the outdoor unit.

The unit comes pre-charged with enough refrigerant for a pipe length of up to 10m. If the piping length exceeds 10m, 20g of refrigerant per 1m should be added by a qualified refrigeration engineer.

Only refrigerant grade copper pipe suitable for refrigerant R410A should be used.

When the outdoor unit is placed at a higher level than the indoor units, a trap should be provided near the hose’s lead-in port. The trap is required to help store lubrication oil for the compressor operation when the units are at different heights.