VERSION 3
05/01/2021
I
NSTALLATION AND
U
SAGE
G
UIDE
WINESP40DUPRO
Page 16
3.4
PIPING CONNECTIONS
Piping connections must be made by a professional refrigeration technician.
The two units are filled with inert gas (nitrogen). They should be connected by a 1/4” copper line
for the liquid line and 3/8” for the gas line. The nuts are
supplied. They should be put on the rigid copper
tube before the flare is made.
The maximum length of each pipe is 20 metres, and the maximum height difference is 10 metres. The
number of bends per connection may not exceed 10.
In order to have the right quantity of refrigerant in the device, refer to the curve below for the
refrigerant charge:
When satisfactory operation is obtained, loosen the connecting valves fully before disconnecting the piping
fittings.
The connections can then be disconnected and plugs put back on the valves.
622
641
660
678
697
715
734
753
771
790
808
827
846
864
883
902
920
939
957
976
995
600
650
700
750
800
850
900
950
1000
0
2
4
6
8
10
12
14
16
18
20
Qu
an
tit
y
o
f r
ef
rige
ra
n
t
(g)
Length of connections (m)
Quantity of refrigerant depending on the length of the connections
between the indoor and outdoor unit (R404A/R449)
