Atlantic 024200, Installation And Commissioning Instructions

Page: 25 / 80

figure 22 - Flaring for flared connections
Expander
tube pipe
Flare
Nut
B
L
C
ø pipe
Dimensions in mm
L B
0
/
-0,4
C
6.35 (1/4") 1 8 to 2 9 1 17
9.52 (3/8") 2 5 to 2 7 13 2 22
12.7 (1/2") 2 6 to 2 9 16 6 26
15.88 (5/8") 2 9 to 3 1 19 7 29
2.9.3 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 state of the journal ( L ).
It must not be scratched or signs of splitting. Also
check the dimension ( B ).
2.9.4 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).
2.9.5 Connecting the flare connections
"
Connections must be made the day of the filling
the installation with gas (see para. 2.10, page 27 ).
"
Pay special attention to the position of the tube
aligned with its connector to avoid damaging
the thread. A correctly aligned connector can be
fitted easily by hand without much force being
required.
"
The refrigerating circuit is very sensitive to dust
and humidity, check that the zone around the
connection is dry and clean before removing the
plugs that protect the refrigerating connectors.
- Remove the plugs from the pipes and refrigerating
connections.
- Place the tube in front of the flare connector and
screw on the nut by hand, holding the connector with a
spanner, until contact is made.
- Respect the tightening torques defined.
figure 23 - Tightening torques
Designation Tightening torque
Flare nut 6.35 mm (1/4") 14 to 18 Nm
Flare nut 9.52 mm (3/8") 33 to 42 Nm
Flare nut 12.7 mm (1/2") 50 to 62 Nm
Flare nut 15.88 mm (5/8") 63 to 77 Nm
Plug (A) 3/8", 1/4" 20 to 25 Nm
Plug (A) 1/2" 25 to 30 Nm
Plug (A) 5/8" 30 to 35 Nm
Plug (B) 3/8", 5/8" 10 to 12 Nm
Plug (B) 1/2", 1/4" 12 5 to 16 Nm
Spanner
Torque wrench
Installation and commissioning instructions "1485 - EN"
- 25 -
Heat pump alféa hybrid duo gas