INSTALLATION MANUAL
18
Table 1. Recommended diameter for the connecting tubes (outer diameter in inches)
Model
Line
Type
Length of Tubes up to (meter
)
Maximal
Height
Difference
10 15
20 25
30
DNC 955
Suction
Liquid
5/8
”
3/8”
5/8
”
3/8”
5/8
”
3/8”
5/8
”
3/8”
5/8
”
3/8”
20
DNC 1150 Suction
Liquid
3/4”
3/8”
3/4”
3/8”
3/4”
3/8”
3/4”
3/8”
3/4”
3/8”
20
DNC 1255 Suction
Liquid
3/4”
3/8”
3/4”
3/8”
3/4”
3/8”
3/4”
3/8”
7/8”
3/8”
20
7.3 Relative positioning of the indoor and outdoor units
The options to position the outdoor unit in relation to position of the indoor unit are described
schematically in Fig. 19, 20, 21 and 22.
x
The outdoor unit is installed above the indoor unit (see Fig. 19). This type of installation
requires an oil trap in the suction line. The oil trap will be positioned at that point where the
vertical section of the tube starting to bend, and to continue horizontally from that point.
The radius of the bend in the oil trap position must be the smallest possible (see Fig. 20).
The suction tube, which is located in a horizontal position, shall have a 0.5% slope
towards the outdoor unit.
x
The liquid line should be parallel to the suction line (except for trap). In case the insulation
must be partially removed for installation purposes, it is imperative that all the tubes be
fully insulated with Arma-flex, including the connectors in the indoor unit, after installation
has been completed.
x
The outdoor unit is installed below the indoor unit according to table No. 1 (see Fig. 21).
No oil traps are required in this type of installation. Refer to instructions described in
previous paragraph.
x
The outdoor and the indoor units are installed at the same level (see Fig. 22). No oil traps
are required in this type of installation. Refer to instructions described in previous
paragraph.
Pay attention!
The maximal distance of the tubes, which connects the outdoor unit with the indoor unit, must not
be longer than the lengths listed in the table. For installations, which require longer tubes routing
between the units, one must consult the Company’s authorized representative.
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