Toshiba RAV-SM1104ATP-E Manual De Instalación página 35

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.
Half union or packed valve Flare nut
Externally Internally
threaded side threaded side
Tighten with torque
Fix with wrench.
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 (dia.) 34 to 42 (3.4 to 4.2
15.9 mm (dia.) 63 to 77 (6.3 to 7.7
Cover
Cap
Piping valve
Loosened
Tightened
Flare nut
Valve at gas side
67-EN
1115250101_EN.indd 34 1115250101_EN.indd 34
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.
In correct
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).
(Unit: N m)
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 refrigerant oil to the flared surface.
Refrigerant pipe length
Single
l A o l w a b e l p p i e e l n g h t ( m
T t o l a e l n g h t L
5 0
Cover
Pipe diameter (mm)
G a s s d i e
Ø 1 5 9 .
Simultaneous twin
System Model
SM110
TWIN
SM140
System Model
SM110
TWIN
SM140
Figure of Single
Indoor unit
Outdoor unit
– 34 –
) H e g i t h difference (Indoor-outdoor H) (m)
n I d o r o u n : t i U p p r e
3 0
Number of bent portions
L q i u d i s d i e
Ø 9 5 .
Allowable pipe length (m) Height difference (m)
Distributed Distributed Indoor-outdoor H
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 30
50 15 10 30
Pipe diameter (mm)
Main pipe Branching pipe
Gas side Liquid side Gas side Liquid side
Ø15.9 Ø9.5 Ø12.7 Ø6.4
Ø15.9 Ø9.5 Ø15.9 Ø9.5
Figure of Simultaneous twin
Indoor unit
Distributor
2
Outdoor unit
Outdoor unit: Lower
3 0
1 0 r o e l s s
Indoor-
Outdoor
indoor ( h)
unit: Upper
30 0.5
30 0.5
Number of
bent
portions
10 or less
10 or less
3
1
EN
ID
68-EN
8/24/13 9:21 AM 8/24/13 9:21 AM