EAS Electric EFMV2 Series Instruction Manual page 66

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) 23.2/0.91
75-85N.m
Ø 22
(765-867 kgf.cm) 26.4/1.04
8. Remove the flaring tool and flare
form then inspect the end of the pipe
for cracks and even flaring.,
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
Tighten the flare nut as tightly as
3.
possible by hand.
Using a spanner, grip the nut on
4.
the unit tubing.
5. While firmly gripping
the nut, use a torque
wrench to tighten the flare
nut according to the torque
values in above table.
NOTE: Use both a spanner
and a torque wrench when
connecting or discon-
necting pipes to/from the
unit.
Flare dimension Flare shape
(A) A) (Unit:
Inch)
Min. Max.
8.4/0.33 8.7/0.34
90 ± ° 4
A
13.2/0.52 13.5/0.53
16.2/0.64 16.5/0.65
19.2/0.76 19.7/0.78
23.7/0.93
26.9/1.06
Flare nut
CAUTION
Ensure

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
R0.4~0.8
damage the bell mouth and under
tightening may lead to leakage.
NOTE 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.
Bend the pipe with thumb
6. After connecting the copper pipes to
the indoor unit, wrap the power cable,
signal cable and the piping together with
binding tape.
NOTE: DO NOT intertwine signal
cable with other wires. While
bundling these items together, do
not intertwine or cross the signal
cable with any other wiring.
7. Thread this pipeline through the wall
and connect it to the outdoor unit.
Pipe
Insulate all the piping, including the
8.
valves of the outdoor unit.
Open the stop valves of the outdoor
9.
unit to start the flow of the
refrigerant between the indoor and
outdoor unit.
CAUTION
Check to make sure there is no
refrigerant leak after completing the
installation work. If there is a refrige-
rant leak, ventilate the area immedia-
tely and evacuate the system (refer to
the Air Evacuation section of this
manual).
29
to wrap
min-radius 10cm (3.9")
insulation
V.1