Formulas And Recommendations For Installation; Calculation Of Opening / Closure Force; Maximum Opening In Accordance With Sash Height; Technical Information About Function - nekos SKY 450 Instruction Manual

condition could compromise safety and invalidate the benefits contained in the
warranty for the appliance.
In the event of any problems or queries, consult your agent or contact the
manufacturer directly.
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
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).

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 . For safety reasons, always check application before fixing the actuator to
TTENTION
the frame or sash. In the event of difficulty, request assistance from the manufacturer to
check application.
P (Kg) = Weight of the window (mobile sash only)
H (cm) = Height of the mobile sash
For vertical windows
 ,
TOP HUNG WINDOWS OUTWARD OPENING
 (B)
BOTTOM HUNG WINDOWS
F = 0,54 x P x C : H
(Eventual load of favourable or unfavourable
wind on the sash should be calculated
separately.)
5
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.
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.

Technical data

Model
Thrust and traction force (F
Course lengths (S
Input voltage (U
N
Current absorption at nominal load (I
Power absorption at nominal load (P
Travel speed without load
Length of run without load
Electrical insulation
Type of service (D
Max. and min. temperatures for function
Degree of protection for electrical devices
Adjustment of socket at casing
Connection in parallel of two or more motors
Connection in tandem or in series
Holding nominal force (it can vary according
to the chosen brackets)
(A)
Limit switch stop at opening and closure
Protection against overload at opening and
closure
Feeding cable length
Dimensions
Weight
Information presented in these illustrations is not binding and is also subject to variation without prior notice.
(*) Technical personnel can shorten track runs by adjusting the internal limit switches.

5. Id plate and marking data

The SKY450 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.
)
N
) 180, 230, 350, 550, 750, 1000 mm (*)
V
)
)
N
)
N
In accordance with length of truck run
)
R
103x47x(Course length+135) mm
Varies according to construction
6
SKY 450
450 N
110-230V~ 50/60 Hz
0,28 A - 0,19 A
21,6 – 24 W
6,7 mm/s
Class II
2 cycles
-5 +65 ºC
IP44
Position self regulating
Yes
Yes
2200 N
At absorption of power
At absorption of power
1 m