Galletti LCWC055, Installation, Maintenance, Usage

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RG66001652_REV.02 18
LCW - LCR
The following table reports the dimensions suggested for piping
Unit model Fluid line Thickness (mm) GAS line Thickness (mm)
LCRC0502-0672 16 mm 1 22 1,5
LCRC0742-1362 18 mm 1 28 1,5
LCRC1522-2442 22 mm 1,5 35 1,5
LCRC2582-3042 28 mm 1,5 42 1,5
Prescriptions for laying
Vertical ascending gas lines set a trap every 4 metres
Vertical fluid lines:
o
The complete miscibility between oil and
refrigerant assures entrainment of
lubricant in all conditions
o
Pay attention to the fact that in the case of
descending lines the pressure generated
by the column of liquid is added to the
outlet pressure: for differences in level
exceeding 10 m contact the manufacturer
to have the safety pressure switches set
accordingly
o
Pay attention to the fact that in the case of
rising lines, the pressure drop due to the
travel height reduces the undercooling of
the liquid, resulting in the possible
formation of flash vapours: in this case
choose a larger sized remote condenser
and charge until you obtain 2°C of
additional undercooling for every 10 m of
height.
The table below shows the classification of piping according to EEC directive 97/23 PED
Outside
diameter
[mm]
Thickness
(mm)
PS
bars
PED
Category
σ s copper
[N/mm2]
actual σ
[N/mm2]
Coeff. Sic.
10 1 28 A3 P3 227 11.2 20.3
12 1 28 A3 P3 227 14 16.2
16 1 28 A3 P3 227 19.6 11.6
18 1 28 A3 P3 227 21 10.8
22 1,5 28 A3 P3 227 17.3 13.1
28 1,5 28 A3 P3 227 23.3 9.8
35 1,5 28 A3 P3 227 28.9 7.85
42 1,5 28 CAT I 227 36.4 6.2
54 1.5 28 CAT I 227 47.6 4.8
Note : The material used for the piping must be exclusively CU-DHP or CW024A. copper of
a quality complying with the specifications of standard EN12735 and for which materials
certificate 3.1b is available.
3 x D
D