▪
Spread out the pipe part by part and do not pull with strength to avoid damage
,
.
▪
Bind the two cooper pipes or together with various connecting wires with
insulated plastic tape
.
▪
Bending of the flexible pipe
The bending shouldn’t exceed
90
Tr
y to bend from the middle of pipe and with a bending radius as large as
possible
.
▪
Apply slight freezing lubricant on the single opening screw thread ball valve
,
screw thread as well as the flare part of copper pipe to avoid the damage
and enhance the sealing property
.
▪
Fasten it with two pieces of spanners as shown in figure
10.
▪
Fastening torque see table
2:
▪
Make sure that the two block valves on the outdoor unit have been totally
closed
.
▪
Connect the vacuum pump to the inspecting opening of liquid pipe block
v
alve and start the vacuum pump to exhaust the air in the connecting pipe
,
and indoor unit until the vacuum degree of pressure is reduced to
mmHg
756
(
20
).
more than
minutes
▪
Open the block valve of gas pipe
.
▪
Open the block valve of liquid pipe
.
▪
Turn on the air conditioner for operation
.
▪
Perform a leak checking with soap water or relative instrument in connection
areas of single opening and copper or block valve and copper to make sure
there is no leaking
.
φ
9.52
40
φ
19.05
100
Tab le
2
5 Pr
ocedures for refrigerant piping connection
Fastening torque N m
(
)
▪
Figure
10
Outer diameter of
copper pipe mm
(
)
Spread out the
connecting pipe
Bind the
connecting pipe
Bend the
connecting pipe
Connection
Vacuum exhaust
Operate
Leak check
4
