3. Installation of outdoor unit
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Heat pump 50Hz/R410A
Part 3 Design and installation
3. Installation of outdoor unit
3.7 Outdoor unit piping
3.7.1 Outdoor unit piping
Required tools
3) Finally, tighten the flare nut with torque
wrench until the wrench clicks.
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow on
the wrench.
A
B
Indoor
side flare
Outdoor
side flare
Gas pipe
Liquid pipe
Torque wrench
B-Unit
A-Unit
Outdoor unit
Screw Driver
Drill M/C f 3.5/F14.5
Measuring Tape, Blade
Core drill
Spanner
Torque Wrench
Soap Foam
Thermometer
Hexagonal wrench(4mm, 5mm)
Hook Meter
Multi Tester
Flare Set
Connecting socket
(Included in indoor unit box)
n
Multi FDX connecting piping size
Indoor units
Gas side
Liquid side
A
B
A
B
18k, 24k
Ø9.52(3/8)
’
Ø12.7(1/2)
Not necessary
2) Align the center of the piping and suffi-
ciently tighten the flare nut by hand.
[Unit : mm(inch)]
3.7.2 Connecting piping
1) Connecting socket must be used when
connecing the piping to the indoor and
outdoor units
n
Multi F connecting socket
Indoor units
Gas
Liquid
A
B
A
B
18k, 24k
Ø9.52(3/8)
’
Ø12.7(1/2)
Not necessary
h
Connecting socket will be provided with indoor unit in
same box.
[Unit : mm(inch)]
Main gas
side valve
Main liquid
side valve
Gas side piping
ROOM A
ROOM B
ROOM C
ROOM D
ROOM E
Liquid
side piping
Outdoor unit
