"Opening Force"
Sensor Adjustment
"Closing Force"
Sensor Adjustment
"brano door operator installation manual"
page 22
SECTION 7 ... continued
SETTING-UP INSTRUCTIONS
The door should exert a downward force of no
more than
5 - 10 kg.
before the safety reverse
mechanism of the
"pro-alpha 2000"
door
operator is activated. For doors in good working
7.4.3 The
left hand side lever
controls the
"Down"
sensitivity.
7.4.4
Note:-
The application of paint, timberseal or varnish to
a wooden garage door can add a considerable
amount of extra weight to the door. The safety
reverse mechanism of the operator should
always be checked after any painting
operations have been carried out.
7.4.5
Don't be tempted to set the closing force
adjustment to be too sensitive. Take into
account the extra effort that is required to
move the door in conditions of strong wind,
or in the case of a wooden door for example,
the extra weight the door can gain when it is
wet !!!
The operator should be set to pull and push
with a force of between
5 - 10 Kg. ! .......
... Regardless of the size of the door !
7.5
The "Safety Overload" Feature
will be automatically activated
when .......
An obstruction is encountered by the
door whilst it is opening, ........
.......
the
door
will
stop!!!
Take Note:- ...
The door will not reverse its direction
whilst it is in the
"opening
mode". ......
......... It will stop!!!
An obstruction is encountered by the
door whilst it is closing, ......
.......
the
door
will
first
stop
and
then
automatically
reverse
it's direction
and
move to the "full-open" position.
7.4 Closing Force Adjustment ....
Stand clear of the path of the door !
7.4.1 Cycle the door in the closing mode.
7.4.2 As the door closes, obstruct the door by
grabbing the bottom rail of the door, or the door
handle if one is fitted. The door should react to this
obstruction by
first stopping and then
reversing its motion to the opening mode.
Fig. 44
Testing the "Sensitivity" Settings
of the Door Operator
Fig. 45
+
/-
1
m
e
tr
e
A
b
o
v
e
G
ro
u
n
d
Door Balance
Springs
p o
0
r a
0
-
0
a
h 2
p
l
order, a downward force of
5 - 10 kg.
is
considered optimum.
i n d u s t r i e s
