Creating The Flarings; Shaping The Refrigeration Pipes; Connecting The Flared Connections - Fujitsu 112 Installation And Operating Manual

Heat pump split single service 3 phase

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).
Flaring tool
ø Hose
L
9,52 (3/8") 2,5 to 2,7
15,88 (5/8") 2,9 to 3,1
Figure 18 - Flaring for flare connections
Installation and operating manual "1364 - EN"
B
Flare
L
nut
C
Hose
Dimensions in mm
B / C
0
-0,4
13,2 22
19,7 29

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.
Holding wrench
Torque wrench
Designation
Flare nut 9,52 mm (3/8")
Flare nut 15,88 mm (5/8")
Plug (A) 3/8"
Plug (A) 5/8"
Plug (B) 3/8", 5/8"
Figure 19 - Tightening torque
Tightening torque
32 to 42 Nm
63 to 75 Nm
20 to 25 Nm
30 to 35 Nm
10 to 12 Nm
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