10
6. INSTALLATION OF INTERCONNECTING TUBING BETWEEN INDOOR AND
OUTDOOR UNITS
6.1 General
(See Figure 9)
The tubing between the indoor and
outdoor units consist of two copper
tubes and an electric cable routed
through a 60-mm wall opening. In
addition, a drainage hose is installed
between the indoor unit and the
closest drainage point. Connect both
sections, taking the shortest, most
direct route.
1. To Outdoor Unit
2. Interconnecting
Tubing
3. Electric
Cable
4. Inclination
Angle
5. To Indoor Unit
Figure 9. Interconnecting tubing and
cable
WARNING!
When laying the tubing for the installation, make sure that the ends are sealed to prevent penetration of
dirt, moisture etc. To prevent dust or moisture from entering the tubes, seal them with caps or masking tape.
It is recommended to clean the inside space of the tubes with nitrogen before connecting them to the unit.
Whenever possible, avoid passing tubes through hot zones, such as walls next to ovens, chimneys, etc.
In such cases, additional insulation or other means of protection should be employed.
Tubing route shall be kept in straight lines as much as possible. When installing, keep the number of tube
bends to a minimum. If bends are necessary, perform them only by using professional tube benders and not
manually.
Make sure that tubing is insulated on its entire length, including tube ends and quick-connectors, or
flare-nuts, to avoid tube “sweating” and water dripping from it.
Tubing shall be of the “L” type, without any damage. Tube inside walls must be kept absolutely clean prior to
and during installation operations.
Each tube shall be individually insulated as follow: until 5/8” O. D. with 6 mm wall thick sleeve - above 3/4” O.
D. with 9 mm wall thick sleeve.
For diameters, length of liquid and suction lines, and height difference, see the Table No. 1 for each model. If
the liquid or suction tube diameters differs from the corresponding flare connector diameter (mounted on the
unit), use a suitable reducing union (it is forbidden to insert a tube into another tube) between the flare
connector and the requested size.
Table No. 1: Unit Interconnecting tubing (indoor and outdoor units)
10
15
20
25
30
50
Suction
3/4"
3/4"
3/4"
7/8"
7/8"
7/8"
Liquid 3/8"
3/8"
3/8"
3/8"
3/8"
3/8"
Suction
3/4"
3/4"
3/4"
7/8"
7/8"
7/8"
Liquid 3/8"
3/8"
3/8"
3/8"
3/8"
3/8"
Suction
7/8"
7/8"
7/8"
7/8"
7/8"
7/8"
Liquid 1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
DSD 50 RCA
50
25
DSD 60 RCA
50
25
Max HEIGHT
DIFFERENCE
50
25
CONNECTING LINE
DSD 40 RCA
TUBING LENGTH, up to - (in metrers, one way)
Max TUBING
LENGT H
UNIT MODEL
INTERCONNECTION TUBING SIZE TABLE
