10
A
Connecting the refrigerant pipe
There are two refrigerant pipes of differing diameters:
A smaller one for the liquid refrigerant
A larger one for the gas refrigerant
The inside of copper pipe must be clean & has no dust.
1
Remove the pinch pipe on the pipes and connect the
assembly pipes to each pipe, tightening the nuts, first
manually and then with a torque wrench, a spanner applying
the following torque.
Outer Diameter
Torque
kgf•cm
N•m
6.35 mm
140~180
14~18
9.52 mm
350~430
34~42
12.70 mm
500~620
49~61
15.88 mm
690~830
68~82
Note
Must apply refrigerant oil on the flaring area to
prevent a leak.
2
Be sure that there must be no crack or kink on the bended area.
3
Cut off any excess foam insulation.
4
Be sure that there must be no crack or wave on the bended
area.
5
It would be necessary to double the insulation
thickness(10mm or more) to prevent condensation even
on the insulator when if the installed area is warm and
humid.
6
Do not use joints or extensions for the pipes that connect
the indoor and outdoor unit. The only permitted connec-
tions are those for which the units
are designed.
Connect the indoor and outdoor units using pipes
with flared connections(not supplied). For the lines,
use insulated, unwelded, degreased and deoxidized
copper pipe,(Cu DHP type to ISO1337), suitable for
operating pressures of at least 4200kPa and for a
burst pressure of at least 20700kPa. Copper pipe for
hydro-sanitary ap- plications is completely unsuit-
able.
For sizing and limits (height difference, line length,
max. bends, refrigerant charge, etc.) see the out-
door unit installation manual.
All refrigerant connection must be accessible, in
order to permit either unit maintenance or remov-
ing it completely.
Refrigerant oil
Torque wrench
Flare nut
Union
Spanner
Spring pipe
Use the bender which have a mini-
mum bending radius when you
bend the pipe.
Be careful so that the pipes is
bended one time only. Piping will
be very difficult if you repeat the
bending more than twice.
If you bend the pipe by using
spring Bending radius should be
more than 100mm so that pipe is
not distorted.
