Figure 18 - Flaring for flare connections
Flaring tool
Hose
Flare
nut
B
L
C
ø Hose
Dimensions in mm
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 6 3 Creating the flarings
-Cut the pipe to an appropriate length with a pipe-cutter
without deforming it.
-Carefully deburr it, holding the pipe towards the bottom
to avoid introducing filings into the pipe.
-Remove the flared connection nut situated on the valve
to be connected and slip the pipe into the nut.
-Proceed to flare, letting the pipe overflow the flaring tool.
-After flaring, check the condition of the working radius
(
L
). This must not show any scratch or trace of any
fracturing. Also check the dimension (
B
).
2 6 4 Shaping the refrigeration pipes
The refrigeration pipes must be shaped only on a
bending machine or with a bending spring in order to
avoid any risk of crushing or breaking them.
"
Warning
• Remove the insulation material locally to bend the
pipes.
• Do not bend the copper to any angle over 90°.
• Never bend pipes more than 3 times in the same
position otherwise traces of fracturing may appear
(from strain-hardening the metal).
2 6 5 Connecting the flared connections
"
The small pipe must always be connected before
the large one
"
Take particular care positioning the tube opposite
its connector so as not to risk damaging the
threads A carefully aligned connector can be
fitted easily by hand without much force being
required
"
The refrigeration circuit is very sensitive to dust
and humidity: check that the area around the
connection is clean and dry before removing the
plugs protecting the refrigeration connectors
-Remove the plugs from the pipes and the refrigeration
connections.
-Present the pipe to the flared connector and screw the
nut by hand while holding the connector with a wrench
until contact.
-Comply with the recommended tightening torques.
Figure 19 - Tightening torque
Designation
Tightening torque
Flare nut 9,52 mm (3/8")
32 to 42 Nm
Flare nut 15,88 mm (5/8")
63 to 75 Nm
Plug (A) 3/8"
20 to 25 Nm
Plug (A) 5/8"
30 to 35 Nm
Plug (B) 3/8", 5/8"
10 to 12 Nm
Holding wrench
Torque wrench
Installation and operating manual "1364 - EN"
- 17 -
Heat pump split single service 3 phase
