BFT BERMA Instrucciones De Uso página 13

• That the door is properly balanced
• That the door can be slid manually and runs smoothly along the whole
of Its stroke.
• If the door being installed is not new, check whether its components are
worn.
• Repair or replace any worn or damaged parts.
Automation reliability and safety are directly influenced by the condition of
the overhead door structure.
4.2) Type of overhead door
The BERMA mod. operator can be installed in the following types of balanced
overhead doors:
a) With vertical guides (fig. 3). For doors over 3.5 metres wide, use a couple
of motors mounted on the side.
b) With vertical and horizontal guides (fig. 4). For doors over 3.5 metres
wide, use a couple of motors mounted on the side.
c) With articulated panels (fig. 5). For doors over 3.5 metres wide, use a
couple of motors mounted on the side.
5) OPERATOR FITTING
5.1) Counterweight overhead door with vertical guides
The single operator is to be placed at mid-point of the overhead door (fig. 9)
so that rotation shaft "A" is 70-80 mm lower than point "P" where the overhead
door balancing arm is fixed.
For installation, proceed as follows:
A) Fix longitudinal members "L" to the operator, as in fig. 9 .
B) Fix all the above to the overhead door panel by means of the screws "V"
supplied, perpendicularly to the axis of the actual door.
In the case of double motor drive (fig. 3), the operators are to be fixed to
the sides of the panel.
5.2) Counterweight overhead door with vertical and horizontal guides
The single operator is to be positioned at mid-point of the overhead door
(fig. 10). Rotation shaft "A" must be about 110 mm lower than half the height
of the door panel.
For installation, proceed as per points A and B in paragraph 5.1.
5.3) Counterweight overhead door with articulated panels
The single operator is to be positioned at mid-point of the lower panel (fig.
11) so that shaft "A" is about 150 mm lower than door hinge "C".
For installation, proceed as per points A and B in paragraph 5.1.
5.4) Counterweight overhead door with double motor drive
In the case of overhead doors wider than 3.5 metres or having an incorporated
small access door, two operators must be mounted.
For installation, consider that the operators must be mounted to the sides
of the panel (fig. 3) and that such operation requires the use of accessories
with short driving tubes. To position and fix the operators, make reference to
paragraphs 5.1, 5.2 or 5.3 depending on the type of overhead door.
6) DRIVING TUBE FITTING
- Position both supports "S" (fig. 12) so that driving tubes "T" are perfectly
level and aligned with operator shaft "A".
- Fix support "S" to the overhead door frame by means of the screws supplied
or by welding.
- Insert tubes "T" (fig. 12) in each of supports "S" and fasten the grooved
bushings to operator shaft "A".
- Cut the excess off the shaft ends, respecting the dimensions in fig. 13,
where "B" is the door balancing arm and "C" is the counterweight case.
- Check that the tubes are correctly inserted in operator shaft "A" and fix
dowels "G" (fig. 14).
7) TELESCOPIC ARM FITTING
7.1) Fixing
Position upper attachment "A" on each arm "BG" as indicated in fig. 15.
Attachment "A" must be positioned in the vicinity of the attachment point on
balancing arm "Bb" of the overhead door. Dimensions "X" and "Y" shown in
fig.15 must allow the telescopic arm sections to remain interconnected for
about 70-80 mm, when they are fully extended (fig.15).
- Weld attachment "A" to the overhead door casing. In the case where at-
tachment "A" must be fixed to the ceiling, make a base as shown in fig.15
and fix by means of expansion plugs.
- Fully open the overhead door (fig. 16) and measure distance "D" between
the centre of attachment "A" and the centre of support "S".
- Having identified dimension "D", cut the ends of the telescopic arms res-
pecting the dimensions in fig. 16. In the case where standard telescopic
arms are too short (very tall doors), use longer telescopic arms.
- Fix guide arms "BG" (fig. 17) to attachments "A" using the pivots and split
pins supplied.
- Insert driving arms "T" into insertion bushings "BI" for the telescopic arms
(fig.15).
INSTALLATION MANUAL
7.2) Timing
Before fixing the telescopic arms to drive shafts "T", the operator must be
timed as explained below.
- Fully close the overhead door.
- For the versions with slow-down provision, fully undo the respective slow-
down screws (fig. 18).
- Activate the manual release and use pliers to rotate the operator shaft in
the direction of the arrow (fig. 18) until the operator is moved to the end
stop position.
- Rotate the shaft in the opposite direction by 5-7°. This operation prevents
the operator from moving to the end-of-stroke position.
- Restore the lock (motor-driven operation)
7.3) Driving tube fixing
- The position taken after timing corresponds to the closed door.
- Electrically weld driving tubes "T" along the edges of insertion bushing "BI"
(fig. 19). Alternatively, the driving tube can be fixed by means of a screw
and nut, after making a hole through bushing "BI" and tube "T" (fig. 19).
8) DOOR BALANCING
8.1) Counterweights
Ensure that the emergency release is activated, then manually open the
overhead door. If, after everything is fitted, the door turns out to be difficult
to open, add material to the counterweights in the following way:
- Open two counterweight cases "CC" (fig. 20) and detach counterweights
"C".
- Add more weights "P" (flat iron bars) by welding, until the previous balancing
condition is restored. If the space between the cases is not sufficient, replace
the counterweights with material having greater specific weight. Balancing
is correct when the door, open by about 45°, remains stationary.
NOTES :
- if the operator is fitted to the mid-point of the door, equally share weights
"P" added to counterweights "C".
- If the operator is fitted to the side, further increase the counterweight on
the side of the operator.
- If the counterweights are in cement, check whether it is possible to use
expansions plugs or other systems to anchor weights "P".
8.2) Installation tips
For counterweight overhead doors with vertical guides, the closing movement
can be made easy by fitting rubber shims "S" (fig. 21) to the door panel or
the external top rail. In the case where the operator excessively unbalances
the door towards the inside, it may be useful to fit an "L" shaped bracket to
the ceiling (fig. 22) to support the actual door when it is opened.
9) ELECTRICAL INSTALLATION LAYOUT
Lay out the electrical installation as indicated in fig. 23.
For connections, use multipolar or single-wire cables inside raceways. Keep
power supply connections separate from service connections, intended for
photocells, safety edges etc. (low voltage).
The cross section and the number of standard connections are indicated
in fig.23.
Illustrations of connection for the different configurations are shown in fig.
24a and 24b.
- Fig. 24a Motor drive with 1 operator
- Fig. 24b Motor drive with 2 operators
For connections to other accessories, use a wire with a cross section of
1 sq mm.
- If the overhead door is provided with a central cover band, pass the con-
nection cables through (fig. 25), otherwise lay out appropriate raceways.
- The section of cables between the wall and the mobile door must have a
loop long enough to allow the door to move without being subject to tension
(fig. 26). If required, a metal raceway can be welded to the guide arm to
lay out motor connection as in fig. 27.
10) CLUTCH ADJUSTMENT
This is adjusted by means of two by-pass valves (fig. 28) marked with the
writing CLOSE and OPEN for adjusting the closing and opening force
respectively. Rotate the valves clockwise to increase the force transmitted;
rotate them anticlockwise to decrease it. The adjusted pushing force must
be slightly greater than that needed to open and close the door completely;
this is to guarantee antisquashing safety and to avoid unnecessary strain
for the structure. Under no circumstances, the by-pass pass must be
completely closed.
The operator does not provide for the use of limit devices, therefore the by-pass
valves will be triggered at the end-of-stroke position both on opening and on
closing for the operation time set in the control unit. Such time must be 2-3
seconds more than the time needed to carry out a complete manoeuvre.
ENGLISH
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BERMA Ver. 04 -