DC Inverter U-match Series for R410A Unitary Split Air Conditioner
12
Installation method: Connect the connection pipes first to the unit. When
bending a connection pipe, be careful not to damage the pipe. Do not over-tighten
the screw nut, otherwise leakage will occur. Besides, the outside of connection pipe
should be added with a layer of insulating cotton to protect it from mechanical
damage during installation, maintenance and transportation.
Item
Model
Size of fitting pipe(inch) Maximum
pipe
length
feet(m)
Biggest drop between
indoor and outdoor
units
feet(m)
Liquid pipe Gas pipe
AUD36W/A-D(U)
AUD60W/A-D(U)
Φ
3/8
Φ
3/4
98.4(30)
49.2(15)
Connection pipe should adopt water-proof insulating material. Its wall thickness
should be 0.5-1.0mm and the pipe wall should be able to withstand 6.0MPa. The
longer the connection pipe is the worse cooling and heating performance it has.
3.2.2.2 Pipe Flaring
(1) Cut the connection pipe with a pipe cutter.
(2) The mouth of connection pipe should face downward. Remove burrs with
the cut surface so that the chips do not enter the pipe.
(3) Remove the cut-off valve of outdoor unit and take out the flare nut from the
bag of indoor unit accessories. Then fit the flare nut on the pipe and use a
flaring tool to flare the mouth of connection pipe.
(4) Check whether the flaring part has cracked. (See the figure below).
