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2. Formulas and recommendations for installation
2.1. Calculation of opening / closure force
Using the formulas on this page, approximate calculations can be made for the force
required to open or close the window considering all the factors that determine the
calculation.
Symbols used for the calculation
F (Kg) = Force for opening or closing
P (Kg) = Weight of the window (mobile sash only)
C (cm) = Opening stroke (actuator stroke)
H (cm) = Height of the mobile sash
For horizontal light domes or skylights
F = 0,54 x P
(Eventual weight of snow or wind on the
cupola should be calculated separately)
.
For vertical windows
TOP HUNG WINDOWS
,
OUTWARD OPENING
(A)
BOTTOM HUNG WINDOWS
(B)
F = 0,54 x P x C : H
(Eventual load of favourable or unfavourable
wind on the sash should be calculated
separately.)
2.2.
Maximum opening in accordance with sash height
The actuator stroke should be selected in accordance with the height of the sash and
its application. Make sure that the actuator does not touch the profile of the sash when
moving along its track, and ensure there are no obstacles blocking the opening and that
the rack moves smoothly along the window frame.
A
TTENTION
. For safety reasons, always check application before fixing the actuator to
the frame or sash. In the event of difficulty, request assistance from the manufacturer to
check application.
3. Technical information about function
The rack actuator performs opening and closing movements for the window using a
round section steel rack. Movement is powered by electricity that feeds a reduction
motor controlled by an electronic board.
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The opening stroke for the window CANNOT be programmed as it is regulated by the
length of the rod on the reduction motor. The electronic control device allows the rack to
protrude until it encounters an obstacle that blocks its stroke. This could be provided by
the internal lock on the rack or complete closing/opening of the window.
In both outwards and return directions the stroke-end uses a self-defining electronic
process with power absorption, and for this reason, no adjustment is required.
4. Construction and standards
INTENDED USE.
The SKY650 rack actuator has been designed and
manufactured to open and close top hung windows opening outwards, bottom
hung windows, dormer windows, light domes and skylights. Specific use is for
ventilation and airing of areas; any other use is strongly discouraged, with the
supplier of the entire system in any case retaining sole liability.
The actuator is manufactured in accordance with the Directives and following
Regulations listed in the attached Declaration of Incorporation and Conformity
.
Electrical connections must conform to regulations in force for the design and
set up of electrical equipment.
To ensure efficient separation from the grid, an approved type of bipolar
“dead-man” switch should be used. An omnipolar general power switch with
minimum distance of 3 mm between contacts should be installed upstream of
the control line.
Application is performed using the brackets provided and any other type of
assembly should be checked with the manufacturer, who will not accept any
responsibility for incorrect or malfunctioning assembly.
The SKY650 actuator comes packaged in a cardboard container which contains:
1 actuator with 2 metre (±5%) lead
1 standard support bracket with respective grips and fixing screws
1 bracket for fixing to the frame
Small parts packaging
Instruction manual
5. Id plate and marking data
The SKY650 actuators have CE marking and comply with the Standards listed in the
Declaration of Conformity. They also come with a Declaration of Incorporation, due to
their classification by the Machinery Directive as “partly completed machines”. Both
declarations are included in the final pages of this manual.
The plate data is displayed on an adhesive label placed on the outside of the casing,
which must remain intact and visible.
The main information it displays includes: manufacturer's address, product name -
model number, technical characteristics, production date and serial number. In the
event of a complaint, please indicate the serial number (SN) displayed on the label.
An explanation of the symbols used on the label to abbreviate the technical
characteristics is given in the table in the chapter on “TECHNICAL DATA”.
