English
8
5. CONNECTION OF REFRIGERANT TUBING BETWEEN INDOOR AND
OUTDOOR UNITS
5.1 General
(See Figure 6)
The indoor and outdoor units are
connected by two copper tubes and
an electric cable, all passed through a
60-mm wall opening. In addition, a
drainage hose connects the indoor
unit with the nearest drain system.
Connect both units taking the shortest,
most direct route.
1. To outdoor unit
2. Connecting tubing
3. Electric cable
4. Inclination angle
5. To indoor unit
Figure 6: Connection of 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.
When not possible to avoid this, additional insulation or other means of protection should be provided.
Route the tubing as straight as possible. 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-attach couplings, or
flared nuts, to avoid tube “sweating” and water dripping from it.
Tubing must be of the “L” type, without any damage. Tubes’ inner walls must be kept absolutely clean prior
to and during installation operations.
Each tube must be individually insulated as follows: tubes up to 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 Table No. 1 for each model. If the
liquid or suction tube diameters differ from the corresponding flared nuts (mounted on the unit’s branch
pipes) diameter, use a suitable adapter (it is forbidden to insert a tube into another tube) between the flare
connection and the unit’s branch pipes.
TUBING LENGTH
,
UP TO
- (
IN METERS
)
UNIT MODEL
REFRIGERANT
LINE
12
16
20
30
MAX HEIGHT
DIFFERENCE
LS 35
Suction
Liquid
1/2”
1/4”
-
-
-
7
LS 40
Suction
Liquid
1/2”
1/4”
1/2”
1/4”
-
-
7
LS 55
Suction
Liquid
5/8”
3/8”
5/8”
3/8”
5/8”
3/8”
-
10
LS 65
Suction
Liquid
5/8”
3/8”
5/8”
3/8”
5/8”
3/8”
-
10
LS 85
Suction
Liquid
5/8”
3/8”
5/8”
3/8”
5/8”
3/8”
5/8”
3/8”
10
Table No. 1