Toshiba RAV-GV1101AT8P-E Installation Manual page 15

Tightening of connecting part
1
Align the centers of the connecting pipes
and fully tighten the fl are nut with your
fi ngers. Then fi x the nut with a wrench as
shown in the fi gure and tighten it with a
torque wrench.
Half union or packed valve Flare nut
Externally Internally
threaded side threaded side
Fix with wrench. Tighten with torque
wrench.
2
As shown in the fi gure, be sure to use two
wrenches to loosen or tighten the fl are nut
of the valve on the gas side. If you use a
single crescent, the fl are nut cannot be
tightened to the required tightening torque.
On the other hand, use a single crescent to
loosen or tighten the flare nut of the valve on the
liquid side.
Outer dia. of copper pipe Tightening torque
9.5 mm (dia.) 34 to 42 (3.4 to 4.2 kgf•m)
15.9 mm (dia.) 63 to 77 (6.3 to 7.7 kgf•m)
Cap
Flare nut
Loosened
Tightened
27-EN
CAUTION
Do not put the crescent wrench on the cap or
cover. The valve may break.
If applying excessive torque, the nut may break
according to some installation conditions.
Cap
Incorrect
• After the installation work, be sure to check for gas
leaks of the pipe connections with nitrogen.
• Therefore, using a torque wrench, tighten the flare
pipe connecting sections that connect the indoor/
outdoor units at the specified tightening torque.
Incomplete connections may cause not only a gas
leak, but also trouble with the refrigeration cycle.
(Unit: N•m)
Do not apply refrigerating machine oil to the
flared surface.
Refrigerant pipe length
Single
Allowable pipe length (m)
Total length L
30
Gas side
Ø15.9
Flare nut
– 14 –
Height difference (Indoor-outdoor H) (m)
Indoor unit: Upper
30
Pipe diameter (mm)
Liquid side
Ø9.5
Indoor unit
Outdoor unit
Outdoor unit: Lower
30
Number of bent portions
10 or less
EN
28-EN