-65-
Table 8 Sizes of R22 flaring and flare nut
[Unit: mm]
(2) Flaring procedure and precautions
a) Ensure there is not any defect or dust, etc. on the flaring and connection.
b) Correctly connect the flared surface and the joint axis.
c) Use a torque wrench to tighten the flaring to the specified torque. The tightening torque
for R410A is the same as that for R22. Insufficient torque may cause gas leakage.
Excessive torque may cause the flare nut damaged and can’t be removed. Please select the
tightening torque of the value specified by the manufacturer. Table 9 shows the reference
values.
Note: Apply the oil specified by the manufacturer on the flared surface If other types of oil are used, it
may cause deterioration of the lubricant and failure of the compressor.
Table 9 Tightening torque for flaring for R410A [reference values]
7.2.3 Storage of piping materials
(1) Types and
storage of piping materials
The refrigerant piping materials for air conditioners are generally divided into the following
types.
The pressure of R410A is higher than that of R22 by about 1.6 times, so be sure to use copper
pipes of the thickness as shown in Table 3 (see Page 56) and try to keep them clean. Be careful
in handling/storing copper pipes to avoid bending, distorting or damaging them. Be careful to
prevent dust, water, etc. from entering the pipes.
Seal the pipe opening with caps, etc. Ensure the sealing is intact during storage. To store coated
or bare copper pipes, use clamps, tape, etc. to fully seal the opening.
Rating
diameter
Outside diameter
(mm)
Thickness
Size
Width of flare nut
Rating
diameter
Tightening torque
N · m (kgf · cm)
Tightening torque of torque wrench available
on the market N · m (kgf · cm)
Refrigerant
piping
materials
With thermal
insulation
Without thermal
insulation
(Bare copper
pipe)
Flared
Not flared
Not flared
Common name
: (a) Pipe sleeve
: (b) Insulated copper pipe
: (c) Bare copper pipe
Outside
diameter
Summary of Contents for SRC25QA-S
Page 10: ... 7 3 ELECTRICAL WIRING DIAGRAM 3 1 Circuit diagram 25QA S ...
Page 11: ... 8 3 2 Circuit diagram 35QA S ...
Page 22: ... 19 B Prevent Range I in jiggle operation from changing to Range C operation ...
Page 58: ... 55 12 Check method for outdoor unit 1 Circuit diagram of 25QA S outdoor unit ...
Page 59: ... 56 2 Circuit diagram of 35QA S outdoor unit ...
Page 81: ... 78 ...
Page 86: ... 83 RAC SRK35QA S PANEL FAN ASSY ...
Page 88: ... 85 20 21 RYD436A021 LOUVER ASSY 1 20 RYD436A020 LOUVER 12 21 RYD129A048 PLATE CONNECTING 2 ...
Page 92: ... 89 ...
Page 94: ... 91 ...
Page 98: ... ...
Page 100: ... 19 RYF937A002A CLAMP WIRE 1 ...
