It is OK to install the walk in freezer condenser unit on the top of roof, about 10 meters high, and 10 meter distance. But you need to pay attention the following points:
- Suction pipe oil return bend:
When the unit is installed higher than the cabinet or cold room, and the height difference is greater than 3 meters, It is necessary to install U-type oil return bend, and install an oil return bend every 5 meters when the height increases. The maximum height difference between the condensing unit and the cabinet should be less than 15 meters. The U-type bend can’t be installed between suction tube horizontal section, otherwise it will accumulate oil. Suction pipe horizontal section: The horizontal section of the suction pipe should be inclined to flow direction of the refrigerant. Inclines 1:125, so that the oil can return back to the compressor asap.

Use Y joint or elbow where the two directions converge.

The type of oil is selected according to the corresponding condensing unit.
Suggestion of the amount of oil to be added: If the length of the refrigeration system pipeline is less than 20 meters, it is not necessary to add oil. If the length exceeds 20 meters, it is recommended to add it according to the table.

- Refrigerant Supplement Suggestion
The type of refrigerant is selected according to the corresponding condensing unit.
Suggestion of the amount of refrigerant to be added: If the length of the refrigeration system pipeline is less than 20 meters, it is not necessary to add refrigerant. If the length exceeds 20 meters, it is recommended to add it according to the table.
