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A
Liquid cooling line.
B
Gas cooling line.
H
Vertical distance between units (max. 30 m).
Total pipe length (vertical + horizontal sec‐
L
tions). Laid and in one direction.
1
Outdoor unit.
2
Indoor unit.
Maximum length L: this is the sum of the lengths of all straight horizontal and vertical sections in one
direction, whether they hold liquid or gas.
Maximum equivalent length L
in one direction, whether they hold liquid or gas, plus the equivalent length of the accessories, basically
elbow joints and bends.
CALCULATION EXAMPLE
1
Outdoor unit.
2
Indoor unit.
3
½" liquid pipe.
4
1 ⅛" gas pipe.
A, B, C, D
Elbow joints (4)
E
Bends (2)
L = 2 + 3 +3 + 6 + 4 + 7 + 6 = 31
31 < 50 is therefore correct
To
calculate
the
equivalent
interconnection piping and as for the charge loss
calculation, use the data of one of the liquid lines, i.e.
½" outer diameter. As can be seen in the diagram,
there are four elbow joints with an equivalent length
of 0,5 m according to the table and two 0,4 m bends
according to the table, to check that the equivalent
length of piping does not exceed the accepted
maximum:
L
= 2 + 3 + 3 + 6 + 4 + 7 + 6 + 4·(0,5) + 2·(0,4) = 33,8 m
E
33,8 < 60 is therefore correct.
Instructions for installation and connection of the unit
: this is the sum of the lengths of all straight horizontal and vertical sections
E
length
of
the
Quick installation guide
2
B
A
L
H
3 m
B
2
3 m
2 m
A
4 m
E
7 m
6 m
F
1
1.5
1
3
C
4
6 m
D
1
17
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