Toshiba RAV-SM1406BTP-E / RAV-SM1404ATP-E [35/48] Refrigerant pipe length

Toshiba RAV-SM1406BTP-E / RAV-SM1404ATP-E [35/48] Refrigerant pipe length
– 34 –
68-EN67-EN
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.
(Unit: Nm)
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.
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.
Outer dia. of copper pipe Tightening torque
9.5 mm (dia.) 34 to 42 (3.4 to 4.2 NJIP
15.9 mm (dia.) 63 to 77 (6.3 to 7.7 NJIP
Half union or packed valve Flare nut
Internally
threaded side
Externally
threaded side
Fix with wrench.
Tighten with torque
wrench.
Flare nut
Piping valve
Cap
Tightened
Loosened
Valve at gas side
Cover
Do not apply refrigerant oil to the flared surface.
In correct
Cap
Cover
Refrigerant pipe length
Single
Simultaneous twin
thgieH)m( htgnel epip elbawollA difference (Indoor-outdoor H) (m)
reppU :tinu roodnIL htgnel latoT
Outdoor unit: Lower
030305
Pipe diameter (mm)
Number of bent portions
edis diuqiLedis saG
ssel ro 015.9Ø9.51Ø
System Model
Allowable pipe length (m) Height difference (m)
Total length
1 + 2
1 +
3
1 + 4
Maximum
Distributed
pipes
2
3
4
Maximum
Distributed
pipes
3 – 2
4 – 2
4 – 3
Maximum
Indoor-outdoor H
Indoor-
indoor (
h)
Indoor unit:
Upper
Outdoor
unit: Upper
TWIN
SM110 50 15 10 30 30 0.5
SM140 50 15 10 30 30 0.5
System Model
Pipe diameter (mm)
Number of
bent
portions
Main pipe Branching pipe
Gas side Liquid side Gas side Liquid side
TWIN
SM110 Ø15.9 Ø9.5 Ø12.7 Ø6.4 10 or less
SM140 Ø15.9 Ø9.5 Ø15.9 Ø9.5 10 or less
Indoor unit
Outdoor unit
Figure of Single
L
H
Indoor unit
Outdoor unit
Figure of Simultaneous twin
h
H
Distributor
2 3
1
EN
ID
1115250101_EN.indd 341115250101_EN.indd 34 8/24/13 9:21 AM8/24/13 9:21 AM

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