Piping Connection - Hisense AVC-05HJFA Operation Installation Maintenance Manual

5.2 Piping Connection

(1) The connection point and diameter of piping
are shown in Figs. 5.1 and 5.2.
144 (Liquid Pipe)
93 (Gas Pipe)
Fig. 5.1 Pipe Connection Points
Fig. 5.2 Pipe Diameter
Since the nut cap connected at gas pipe is
designed exclusively for R410A, the piping flaring
connected for off-factory installation is adjusted as
compared with R22 and R407C. Please perform
the processing operation based on the dimensions
shown below: (See Fig. 5.3)
±2
0
90 0
45
0
±2
0
Outside Diameter of
Piping (a)
Outside
Diameter
of Flaring
(D)
a
D
0
-0.4
Unit: mm (in.)
Unit: mm (in.)
Φ12.7
Φ15.88
(1/2)
(5/8)
16.6 19.7
R410A
Fig. 5.3 Flaring
(2) As shown in Fig. 5.4, two spanners shall be used for
tightening the nut
Pipe Size
Φ6.35
Φ9.53
Φ12.7
Φ15.88
Φ19.05
Fig. 5.4 Nut tightening torque
(3) Insulate the refrigeration piping with field-
supplied insulating pipe upon completion of
refrigerant pipe connection. See Fig. 5.5.
Cord Clamp
(Factory-Supplied)
Unit Side
Fig. 5.5 Insulation on Pipes
● Cap the end of the pipe when the pipe is to
penetrate a hole.
● Do not put pipes on the ground directly without a
cap or vinyl tape arranged at the end of the pipe.
Do not put pipes on the ground directly
Correct
Blocked with Tape or Plug
(4) Discharging and Charging Refrigerant
Follow the Installation & Maintenance Manual for
outdoor unit.
Excessive and inadequate refrigerant is a leading
cause of system anomaly.
Please inject the right amount of refrigerant.
5
Tightening Torque (N.m)
20
40
60
80
100
Insulating Pipe
(Field-Supplied)
Refrigeration Piping
(Field-Supplied)
Insulating Pipe
(Field-Supplied)
Insulating Pipe
Incorrect