figure 19 - Flared section for flare connectors
Expander
tube
pipe
Flare
nut
B
L
C
Dimensions in mm
ø pipe
L
B
0
/
-0,4
C
9.52 (3/8")
2 5 to 2 7
13 2
22
15.88 (5/8")
2 9 to 3 1
19 7
29
2 .7 .2 Refrigerating connections
The connection between the outdoor unit and the
Hydraulic module must
only
be made with new copper
connectors (refrigerating quality) and individually
insulated.
Respect the diameters of the pipes and the authorised
).
If the refrigeration connections are exposed to
weathering or UV- and the insulation is not strong, it is
necessary to provide protection.
Handle the pipes and pass them through the walls with
the protection plugs in place.
If the distance between the outdoor unit and the
hydraulic unit exceeds the length of the maximum
conduits indicated in the table, an additional charge of
R410A must be loaded.
The quantity of R410A added must be suited to the
length of the refrigerating circuit so as to maintain the
performances of the heat pump and not damage the
compressor (
).
2 .7 .3 Flaring
-
Cut the tube with a tube cutter to the required length
without deforming it.
-
Carefully deburr while holding the tube downwards to
avoid introducing swarf into the tube.
-
Remove the flare nut from the connector on the valve
to be connected and fit the tube into the nut.
-
Flare it leaving the tube protruding fro the expandable
flaring tool.
-
After flaring, check the condition of the journal (
L
).
It must not be scratched or signs of splitting. Also
check the side (
B
).
2 .7 .4 Forming the refrigerant tubes
The refrigerating tubes must only be formed using a
bending machine or a bending spring in order to avoid
any risks of crushing or splitting.
"
Warning!
• Remove the insulation locally to bend the tubes.
• Do not bend the copper to an angle of more than 90°.
• Do not bend the tubes more than 3 times at the same
position otherwise this can cause the pipe to split
(hardening of the metal).
figure 20 - Tightening torques
Designation
Tightening torque
Flare nut 9,52 mm (3/8")
33 to 42 Nm
Flare nut 15,88 mm (5/8")
63 to 77 Nm
Plug (A) 5/8"
30 to 35 Nm
Plug (B) 3/8", 5/8"
10 to 12 Nm
Spanner
Torque wrench
Installation and operating manual
"
1605 - EN
"
- 19 -
alfea hybrid duo heat pump oil low NOx CH
