HTW ADMIRA FST3-140ADM Manuel De L'utilisateur Et D'installation page 70

5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
Flare form
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool
clockwise until the pipe is fully flared. Flare
the pipe in accordance with the dimensions
shown in table .
8. Remove the flaring tool and flare form,
then inspect the end of the pipe for cracks
and even flaring.
PIPING EXTENSION BEYOND FLARE FORM
Pipe Tightening
torque
gauge
18-20 N.m
Ø 6.35
(183-204 kgf.cm)
25-26 N.m
Ø 9.52
(255-265 kgf.cm)
35-36 N.m
Ø 12.7
(357-367 kgf.cm)
45-47 N.m
Ø 16
(459-480 kgf.cm)
65-67 N.m
Ø 19
(663-683 kgf.cm)
75-85N.m
Ø 22
(765-867 kgf.cm)
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first,
then connect it to the outdoor unit. You should
first connect the low-pressure pipe, then the
high-pressure pipe.
1. When connecting the flare nuts, apply a
thin coat of refrigeration oil to the flared
ends of the pipes.
2. Align the center of the two pipes that you
will connect.
Indoor unit tubing
Pipe
Flare dimension (A) Flare shape
(Unit: mm/Inch)
Min. Max.
90 ° ± 4
8.4/0.33 8.7/0.34
13.2/0.52 13.5/0.53
16.2/0.64 16.5/0.65
19.2/0.76 19.7/0.78
23.2/0.91 23.7/0.93
26.4/1.04 26.9/1.06
Flare nut
3. Tighten the flare nut as tightly as possible
by hand.
4. Using a spanner, grip the nut on the unit
tubing.
5. While firmly gripping the nut, use a torque
wrench to tighten the flare nut according
to the torque values in table .
NOTE: Use both a spanner and a torque
wrench when connecting or disconnecting
pipes to/from the unit.
A
CAUTION
R0.4~0.8
Ensure to wrap insulation around the piping.
•
Direct contact with the bare piping may
result in burns or frostbite.
Make sure the pipe is properly connected.
•
Over tightening may damage the bell mouth
and under tightening may lead to leakage.
NOTES ON MINIMUM BEND RADIUS
Carefully bend the tubing in the middle
according to the diagram below. DO NOT
bend the tubing more than 90° or more than
3 times.
Pipe
29
Bend the pipe with thumb
min-radius 10cm (3.9")