Toshiba RAS-M10GKCVP-E Service Manual page 58

Tightening Connection
Align the centers of the connecting pipes and tighten
the flare nut as much as possible with your fingers.
Then tighten the nut with a wrench and torque
wrench as shown in the figure.
Half union
Externally
threaded side
Use a wrench
to secure.
Fig. 10-5-7
CAUTION
• Do not apply excessive force.
Otherwise, the nut may break.
Outer dia. of copper pipe
Ø6.35 mm
Ø9.52 mm
Ø12.7 mm
Fig. 10-5-8
Flare nut
Internally
threaded side
Use a torque wrench
to secure.
(Unit : N·m)
Tightening torque
14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)
Flare at
indoor unit side
Flare at
outdoor unit side
• Tightening torque for connection of flare pipe
The pressure of R410A is higher than R22.
(Approx. 1.6 times.) Therefore securely tighten the
flare pipes which connect the outdoor unit and the
indoor unit with the specified tightening torque
using a torque wrench.
If any flare pipe is incorrectly connected, it may
cause not only a gas leakage but also
trouble in the refrigeration cycle.
Outdoor unit
RAS-
(with reducer)
3M23GACV-E
(with reducer)
All combinations that do not exceed the "Total"
number can be installed.
Note that expanders and reducers may be required
depending on the combination method.
– 58 –
Ø6.35
Ø9.52
Ø6.35
Ø9.52
Ø6.35
Ø12.7
Fig. 10-5-9
Connectable capacity class
A B C
10 10 10
13 13 13
16 16 16
(with expander) (with expander)
Unit C
Unit B
Unit A
Indoor unit
Total
36