19
18
GB
GB
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
4 Intended use
The chain drive ELTRAL KS 30/40 is designed exclusively for the automatic opening
and closing of tilt windows, top hung outward opening windows, side hung windows,
horizontal and vertical pivot windows, roof lights and small domes.
4.1 ELTRAL KS 30/40 SYNCHRO
The SYNCHRO variant of ELTRAL KS 30/40 is used wherever two drives are required
on one window, i.e. for sash widths over 1500 mm or with heavy sashes for which the
force of a single drive is not sufficient.
This variant is provided with an internal control to enable the synchronisation of the
chain movement of two drives. External speed control is fully automatic and does not
require an external control unit; it is sufficient to connect the red and white wires of
the two connecting cables with the clamp also included in the delivery
(see chapter
6.4).
Should one of the drives fail due to mechanical or electrical impediment, the other one
will also stop, thus preventing the window from being damaged.
4.2 Sash dimensions
Sash height
Depending on the stroke and the respective application, the minimum sash heights
specified below are to be observed. For horizontal or vertical pivot windows the values
refer to the distance between pivot and outside edge of sash.
Minimum sash height [mm]
Stroke [mm]
Tilt sash
Outward opening
Outward opening
frame-mounted
soffit-mounted
110
250
150
200
200
500
250
350
300
850
350
600
400
1100
450
800
Sash width
Maximum sash width with 1 drive: 1500 mm
Maximum sash width with 2 drives (Synchro): 3000 mm
Note: In order to achieve a higher gasket pressure, we recommend to use two SYNCHRO
drives on one window from a sash width of 1200 mm.
The product guidelines of the profile manufacturers regarding construction, assembly,
max. sash dimensions, max. sash weights and material qualities (e.g. longitudinal
expansion) are to be observed.
4.3 Calculating the opening/closing force
With the formulae indicated below it is possible to determine the approximate force
required to open or close a (smooth-running) window; possible wind or snow loads are
to be considered.
F = Opening/closing force [N]
P = Sash weight [kg]
C = Opening distance of sash (stroke) [mm]
H = Height of sash [mm]
For light domes or horizontally installed windows
F = 5,4 x P
For vertically installed tilt or top hung windows
F = (5,4 x P) x (C : H)
5 Assembly
The following details are intended for the attention of specialised
staff. Basic job safety details are therefore not included.
Any preparatory work, assembly and electrical connec-
tions must be carried out by trained technicians.
First of all, please verify that the following technical pre-
conditions are fulfilled:
• The chain drive’s power must be sufficient to move the window.
The limit values indicated in the technical specification
table
(see chapter 3) must not be exceeded.
•
Attention:
Please check if the electrical supply corre-
sponds to the specifications on the type label.
• Ensure that the drive was not damaged during tran-
sport. After the visual check, verify the correct functio-
ning in both stroke directions.
• Verify that the window sash is sufficiently high to allow
for the assembly of the drive
(see table minimum sash
heights in 4.2). It might be necessary to adjust the drive
to a smaller stroke before connecting the window sash
with the chain.
• With tilt sashes, the clearance between frame and sash
profile must be at least 1 mm
(Fig. 1) in order to provide
for safe closing of the window.
If frame and sash profiles are flush, or if the sash profi-
le stands back from the frame profile on the interior
side, it is necessary to underlay the tilt sash bracket
accordingly.
*ELTRAL GU (D-GB) 29-11-2007 15:08 Pagina 18
