Formulas And Recommendations For Installation; Calculation Of Opening / Closure Force - Master FORCE 300 N Instruction Manual

With bottom hung windows injury could be caused if the window accidentally falls.
An appropriately sized flexible link arm or fall prevention safety system designed to
resist a force equal to at least three times the total weight of the window MUST be
installed.
Danger of crushing or dragging. During function, when the actuator closes the
window, a force of 300N is exerted on the bead of the frame, enough to crush
fingers in the event of distraction.
Ensure that the stroke-end selection is less than one centimetre from mechanical
stop blocks, stroke limiters or any physical obstacles blocking opening of the sash.
In the event of breakage or malfunction, switch the appliance off at the general
switch and call for the services of a qualified technician.

2. Formulas and recommendations for installation

2.1. Calculation of opening / closure force

Using the formulas below, 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
C (cm) = Opening stroke (actuator stroke)
For horizontal light domes or
skylights
F = 0.54 x P
(Eventual weight of snow or wind on the
cupola should be calculated separately).
WARNING
P (Kg) = Weight of the window (mobile sash only)
H (cm) = Height of the mobile sash
For vertical windows
TOP HUNG WINDOWS
BOTTOM HUNG WINDOWS
F = 0.54 x P x C : H
(Eventual load of favourable or unfavourable
wind on the
separately.)
,
OUTWARD OPENING
(B)
sash should be
(A)
calculated
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