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I0680001/06-2016
21
3. Formulas and recommendations for installation
3.1.
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.)
3.2.
Maximum opening based on sash height
The selection of the actuator stroke should be made based on the height of the sash
and its application. As a general rule, never select a stroke greater than the height of
the window frame; select the stroke directly below it.
W
ARNING
. The actuator is designed to be recess mounted on the window
frame.
Check that during the stroke the chain does not touch the profile of the sash,
there are no obstacles to opening the window and the chain does not push
against the window frame.