Toshiba RAV-SP1104AT8-E1 Service Manual page 89

CAUTION
1. Do not put the crescent wrench on the cap or cover.
The valve may break.
2. If applying excessive torque, the nut may break
according to some installation conditions.
NO GOOD
Cover
Cap
• After the installation work, be sure to check for gas
leaks of the pipe connections with nitrogen.
• Pressure of R410A is higher than that of R22 (Approx.
1.6 times).
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.
Do not apply refrigerating machine oil to the flared
surface.
EN-129
- 65 -
Refrigerant Pipe Length
Single
Allowable pipe length (m)
Total length L
75
Pipe diameter (mm)
Gas side
Ø15.9
Simultaneous twin, triple
Allowable pipe length (m)
Total length
• 1 + 2
System Model
• 1 + 3
• 1 + 4
Maximum
SP110 50
TWIN
SP140,
50
SP160
TRIPLE SP160 only 50
System Model
Gas side
SP110 Ø15.9
TWIN
SP140,
Ø15.9
SP160
TRIPLE SP160 only Ø15.9
Figure of Single Figure of Simultaneous twin
Indoor Unit
Outdoor Unit Outdoor Unit
Height difference (Indoor-outdoor H) (m)
Indoor unit: Upper Outdoor unit: Lower
30
Number of bent portions
Liquid side
Ø9.5
Height difference (m)
Distributed Distributed Indoor-outdoor H
pipes pipes
• 2 • 3 – 2
Indoor unit: Outdoor
• 3 • 4 – 2
Upper unit: Upper
• 4 • 4 – 3
Maximum Maximum
15 10 30
15 10 30
15 10 30
Pipe diameter (mm)
Main pipe Branching pipe
Liquid side Gas side Liquid side
Ø9.5 Ø12.7 Ø6.4
Ø9.5 Ø15.9 Ø9.5
Ø9.5 Ø12.7 Ø6.4
Figure of Simultaneous triple
Indoor Unit Indoor Unit
Indoor Unit
Indoor Unit
Distributor
Outdoor Unit
2
2 3
1
30
10 or less
Indoor-
indoor (Δh)
30 0.5
30 0.5
30 0.5
Number of
bent portions
10 or less
10 or less
10 or less
Indoor Unit
4
3
Distributor
1
EN-130