MSAT 102-122-142-162-182-202-242

REFRIGERANT PIPES
The sizing of the refrigerant lines connecting the outdoor condensing unit and the indoor evaporating unit is of primary
importance. For connections to our units, see the table below, where for the lengths specified, the diameter of the fittings
corresponds to the diameter to be used for the connection pipes.
For greater distances, the diameter must be calculated (see corresponding bibliographies or our bulletin SIZING THE
REFRIGERANT LINES IN SPLIT SYSTEMS). The table below also describes the recommended maximum difference in
height for standard pipes, in both the case where the condensing unit is lower than the terminal unit, and vice-versa.
Only use copper pipes for refrigeration.
Size Intake dia. Liquid dia. Max. Max. Max difference in
height
length m no. curves Fig. 4 Fig. 6
102 22 14 10 6 9 9
122 22 14 10 6 9 9
142 28 16 16 8 12 12
162 28 18 16 6 10 10
182 28 18 12 6 10 10
202 35 22 23 10 18 18
242 35 22 20 10 14 14
INTAKE PIPE
For all sizes, the fittings are welded; the unit is supplied as standard with special
ROTALOCK connections.
- Connect the specific line to the on-off valve using two spanners as shown (Figure 1
for the first circuit, Figure 2 for the second).
Figure 1
Figure 2
LIQUID PIPES
Figure 3
For all sizes, the fittings are welded; the unit is supplied as standard with special
ROTALOK connections.
- Connect the line to the on-off valve using two spanners, as shown (Figure 3 for
the first circuit, Figure 4 for the second).
Figure 4
NOTE:
All the pipes must be perfectly clean (clean using nitrogen or dry air before connecting the pipes to the two units) and free
of moisture for optimal emptying.
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