A
Liquid cooling line.
B
Gas cooling line.
H
Vertical distance between units (max. 30 m).
L
Total pipe length (ve horizontal sec‐
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
E
: this is the sum of the lengths of all straight horizontal and vertical sections
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 length of the
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
E
= 2 + 3 + 3 + 6 + 4 + 7 + 6 + 4·(0,5) + 2·(0,4) = 33,8 m
33,8 < 60 is therefore correct.
A
B
H
L
1
2
1
2
2 m
3 m
3 m
6 m
4 m
7 m
6 m
A
B
C
D
E
F
3
4
Quick installation guide
1
Instructions for installation and connection of the unit
1.5
17
