Refrigerant Pipe Installation - Lennox LIUH018021T431E-1 Service Manual

5. Refrigerant pipe installation

5.1 Maximum pipe length and height drop
Considering the allowable pipe length and height drop to decide the installation position. Make sure the
distance and height drop between indoor and outdoor unit not exceeded the date in the following table.
Model
12,000Btu/h
18,000Btu/h
24,000Btu/h
36,000Btu/h ~60,000Btu/h
5.2 The procedure of connecting pipes
5.2.1 Choose the pipe size according to the specification table.
5.2.2 Confirm the cross way of the pipes.
5.2.3 Measure the necessary pipe length.
5.2.4 Cut the selected pipe with pipe cutter
➢
Make the section flat and smooth.
5.2.5 Insulate the copper pipe
➢
Before test operation, the joint parts should not be heat insulated.
5.2.6 Flare the pipe
➢
Insert a flare nut into the pipe before flaring the pipe
➢
According to the following table to flare the pipe
Installation
Max. Length
25m
30m
50m
65m
Lean Crude
Refrigerant pipe installation
Max. Elevation
10m
20m
25m
30m
Burr
93