Sanyo CLM2472 Service Manual - Page 82

Caution before Connecting Tubes Tightly, Tubing Connections, Table 4, Fig. 9, Fig. 11, Fig. 10, Fig

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NOTE When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 9) Copper tubing (3) Remove the flare nut from the unit and be sure to mount it on the copper tube. Reamer (4) Make a flare at the end of copper tube with a flare tool.* (Figs. 10 and 11) (*Use "RIGID" or equivalent.) NOTE If the special R410A flare tool is used: Fig. 9 If the previous flare tool (clutch-type) is used: A good flare should have the following characteristics: G inside surface is glossy and smooth. G edge is smooth. G tapered sides are of uniform length. 0 to 0.0196" (0 to 0.5 mm) 0.0472" (1.2 mm) Adjust so that the amount of tube protrusion is as shown in the figure. Fig. 10 3-4. Caution before Connecting Tubes Tightly a) Be sure to apply a sealing cap or water-proof tape to prevent dust or water from getting into the tubes before they are used. b) Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union before connecting them together. This is effective for reducing gas leaks. (Fig. 12) Flare nut Copper tubing Flare tool Fig. 11 c) For proper connection, align the union tube and flare tube straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 13) 3-5. Tubing Connections a) Temporary connection: Screw in 3 - 5 rotations by hand. (Fig.14) Apply refrigerant lubricant here and here Fig. 12 b) To fasten the flare nuts, apply specified torque as: Table 4 Tube Dia. 1/4" (6.35 mm) 3/8" (9.52 mm) 1/2" (12.70 mm) 5/8" (15.88 mm) Tightening Torque Approx. 120 - 160 lbs·in (140 - 180 kgf·cm) Approx. 300 - 360 lbs·in (340 - 420 kgf·cm) Approx. 430 - 540 lbs·in (490 - 610 kgf·cm) Approx. 590 - 710 lbs·in (680 - 820 kgf·cm) Union Flare nut Fig. 13 Service valve on D narrow tube side C B A Service valve on wide tube side Fig. 14 16 Apply the provided labels to the indoor and outdoor unit tubing connectors to prevent errors in connections.

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16
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube. (Fig. 9)
(3)
Remove the flare nut from the unit and be sure to mount
it on the copper tube.
(4)
Make a flare at the end of copper tube with a flare tool.
*
(Figs. 10 and 11)
(
*
Use “RIGID” or equivalent.)
A good flare should have the following characteristics:
●
inside surface is glossy and smooth.
●
edge is smooth.
●
tapered sides are of uniform length.
3-4.
Caution before Connecting Tubes Tightly
a)
Be sure to apply a sealing cap or water-proof tape to
prevent dust or water from getting into the tubes before
they are used.
b)
Be sure to apply refrigerant lubricant to the matching
surfaces of the flare and union before connecting them
together. This is effective for reducing gas leaks.
(Fig. 12)
c)
For proper connection, align the union tube and flare
tube straight with each other, then screw in the flare nut
lightly at first to obtain a smooth match. (Fig. 13)
3-5.
Tubing Connections
a)
Temporary connection:
Screw in 3 – 5 rotations by hand. (Fig.14)
b)
To fasten the flare nuts, apply specified torque as:
Table 4
NOTE
NOTE
Reamer
Copper
t
u
bi
ng
Fig. 9
Flare tool
Flare
nu
t
Copper
t
u
bi
ng
Fig. 11
Fig. 10
Apply refri
g
era
n
t
l
u
brica
n
t here a
n
d here
Fig. 12
Flare nut
Union
Fig. 13
0 to 0.0196"
(0 to 0.5 mm)
If the
sp
ecial R410A
flare tool i
s
u
s
ed:
0.0472" (1.2 mm)
If the
p
reviou
s
flare tool
(clutch-ty
p
e) i
s
u
s
ed:
Adj
us
t
s
o that the amo
un
t of t
u
be
protr
us
io
n
i
s
a
s
s
how
n
i
n
the fi
gu
re.
Tube Dia.
Tightening Torque
1/4" (6.35 mm)
Approx. 120 – 160 lbs·in (140 – 180 kgf·cm)
3/8" (9.52 mm)
Approx. 300 – 360 lbs·in (340 – 420 kgf·cm)
1/2" (12.70 mm)
Approx. 430 – 540 lbs·in (490 – 610 kgf·cm)
5/8" (15.88 mm)
Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)
Apply the provided labels
to the indoor and outdoor
unit tubing connectors to
prevent errors in
connections.
Service valve on
narrow tube side
Service valve on
wide tube side
A
B
C
D
Fig. 14