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10.2.3 - Maximum possible number of cycles per day

This product is specifically designed to operate also with the PF solar
power supply system. Special technical provisions have been envisaged
to minimise energy consumption when the automation is stationary, by
turning off all devices not essential to operation (for example photocells
and the key-operated selector switch). In this way all energy available and
stored in the battery is used to move the gate.

Caution! – When the automation is powered by the solar power
system “PF”, IT MUST NEVER BE POWERED at the same time by
the mains.

Application limits:

maximum possible number of cycles per day within

a set period of the year.

The PF solar power system enables complete power autonomy of the
automation, until the energy produced by the photovoltaic panel and
stored in the battery remains above the amount consumed during gate
manoeuvres. A simple calculation enables an estimate of the maximum
number of cycles per day performed by the automation in a certain period
of the year, provided that a positive energy balance is maintained.
The first step in

calculating the energy available

is dealt with in the PF

instruction manual; the second step in

calculating the energy consumed

and therefore the maximum number of cycles per day, is dealt with in this
chapter.

Calculating the energy available

To calculate the energy available (refer also to the PF instruction manual)
proceed as follows:

01.

On the terrestrial map supplied in the PF kit instruction manual,
locate the point of system installation; then read the value

and

the degrees of

latitude

of this location (E.g. Ea = 14 and degrees =

45°N)

02.

On the graphs (North or South) supplied in the PF kit instruction man-
ual, locate the curve for the location’s

latitude

(e.g. 45°N)

03.

Choose the

period of the year

on which to base the calculation, or

select

the lowest point

of the curve to calculate

the worst period

of the year; then read the corresponding value Am (e.g. December,
January: Am= 200)

04.

Calculate the value of energy available

(produced by the panel) mul-

tiplying: Ea x Am = Ed (e.g. Ea = 14; Am = 200 therefore Ed = 2800)

Calculating the energy consumed

To calculate the energy consumed by the automation, proceed as follows:

05.

On the table below, select the box corresponding to the intersection
between the line with the

weight

and the column with the

opening

angle

of the gate leaf. The box contains the value of the

severity

index

(K) for each manoeuvre (e.g. WS2S with a leaf of 130 Kg and

opening of 100°; K = 106).

(

) value B specified in the table represents the optimal value; if B is a lower

value, add 20% to value K specified in the table.

06.

On the

table A

below, select the box corresponding to the intersec-

tion between the line with the Ed value and the column with the K
value. The box contains the maximum possible number of cycles per
day (e.g. Ed = 2800 and K= 106; cycles per day

≈

22)

If the number obtained is too low for the envisaged use or is located in the
“area not recommended for use”, the use of 2 or more photovoltaic pan-
els may be considered, or the use of a photovoltaic panel with a higher
power. Contact the Mhouse technical assistance service for further infor-
mation.
The method described enables the calculation of the maximum possible
number of cycles

per day

that can be completed by the automation while

running on solar power. The calculated value is considered an average
value and the same for all days of the week. Considering the presence of
the battery, which acts as an energy “storage depot”, and the fact that the
battery enables automation autonomy also for long periods of bad weather
(when the photovoltaic panel produces very little energy) it may be possible
to exceed the calculated maximum possible number of cycles per day, pro-
vided that the average of 10-15 days remains within the envisaged limits.

Table B

below specifies the maximum possible number of cycles,

according to the manoeuvre’s

severity index

(K), using

exclusively the

energy stored

by the battery. It is considered that initially the battery is

completely charged (e.g. after a prolonged period of good weather or
recharging via the optional PCB power supply unit) and that the manoeu-
vres are performed within a period of 30 days.

When the battery runs out of the stored energy, the led starts to indicate
the battery low signal by flashing briefly every 5 seconds, accompanied
by a “beep”.

Opening angle

Leaf weight

≤

95° (B

≈

200)*

95÷105° (B

≈

130)* 105÷110°(B

≈

70)*

< 75 Kg