Toshiba RAV-GP1101AT8-E Manuel D'installation page 81

Tightening of Connecting Part
1. Align the centers of the connecting pipes and fully
tighten the flare nut with your fingers. Then fix the
nut with a wrench as shown in the figure and tighten
it with a torque wrench.
2. As shown in the figure, be sure to use two wrenches
to loosen or tighten the flare nut of the valve on the
gas side. If you use a single crescent, the flare 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 33 to 42
15.9 mm 68 to 82
Valve at gas side
Cap
Loosened
Tightened
Flare nut
EN-159
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.
Incorrect
(Unit: N•m)
Cap
Cover
• 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
Piping valve
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.
Do not apply refrigerating machine oil to the flared
surface.
Refrigerant Pipe Length
Single
Allowable pipe length (m)
Total length L
75
Cover
Gas side
Ø15.9
Simultaneous twin, triple
System Model
GP110
TWIN
GP140,
GP160
TRIPLE GP160 only
System Model
GP110
TWIN
GP140,
GP160
TRIPLE GP160 only
Figure of Single
Indoor Unit
Outdoor Unit
- 80 -
Height difference (Indoor-outdoor H) (m)
Indoor unit: Upper
30
Pipe diameter (mm)
Liquid side
Ø9.5
Allowable pipe length (m)
Distributed Distributed
Total length
pipes pipes
• 1 + 2
• 2 • 3 – 2
• 1 + 3
Indoor unit:
• 3 • 4 – 2
• 1 + 4
Upper
• 4 • 4 – 3
Maximum
Maximum Maximum
50 15 10
50 15 10
50 15 10
Pipe diameter (mm)
Main pipe Branching pipe
Gas side Liquid side Gas side
Ø15.9 Ø9.5 Ø12.7
Ø15.9 Ø9.5 Ø15.9
Ø15.9 Ø9.5 Ø12.7
Figure of Simultaneous twin
Indoor Unit
Indoor Unit
Indoor Unit
Distributor
Outdoor Unit
Outdoor Unit
2 3
1
Outdoor unit: Lower
30
Number of bent portions
10 or less
Height difference (m)
Indoor-outdoor H
Indoor-
Outdoor
indoor (Δh)
unit: Upper
30 30 0.5
30 30 0.5
30 30 0.5
Number of
bent portions
Liquid side
Ø6.4 10 or less
Ø9.5 10 or less
Ø6.4 10 or less
Figure of Simultaneous triple
Indoor Unit
Indoor Unit
4
2 3
Distributor
1
EN-160