Installation Tips - BFT BERMA Instructions D'installation

"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 attachment
"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 respecting
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).
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 expan-
sions 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 connection
cables through (fig. 25), otherwise lay out appropriate raceways.
- The section of cables between the wall and the mobile door must have a loop
12 -
BERMA
INSTALLATION MANUAL
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.
11) SLOW-DOWN ADJUSTMENT
The models available for this device allow the speed to be slowed down in the
end-of-run phase. They allow opening and closing manoeuvres free from any
slamming noise. The slow-down phase is activated about 15°-20° before the
closing or opening manoeuvre is completed. Fig. 29 shows adjustment screws
"A" and "C" for opening and closing respectively. These are adjusted by means of
a 3 mm Allen key.
12) EMERGENCY MANOEUVRE
The irreversibility of the reduction gear unit allows the overhead door to be
tightly held in the closing and opening position, and makes the use of an electric
lock redundant.
Knob release or wire command systems are available.
- The knob release device is activated by unscrewing the knob anticlockwise (fig.
30). To reactivate motor-driven operation, fully screw the release knob.
- The SEB version release device with wire command (fig. 31) must be used when
the garage does not have a secondary access. The wire command device allows
the door to be released from the outside by inserting the personalised key into
the appropriate lock, which is to be rotated by about 180° to activate the release
for manual opening. In the case where the release must be activated from the
inside (fig. 32), manually rotate lever "L" from position "A" to position "B", and
keep it in the required position during the entire manoeuvre.
Motor-driven operation is restored by removing the key from the external release
lock or simply by releasing lever "L" from the inside.
13) THE CONTROLS
With the automation the door has a power driven opening and closing. The con-
trols can come in various forms (i.e. manual, remote controlled, limited access by
magnetic badge, etc.) depending on needs and installation characteristics. For
details on the various command systems, consult the specific instruction booklets.
Anyone using the automation must be instructed on its operation and controls.
14)OPERATOR USE
Since the operator can be remotely controlled by means of a radio transmitter or
Start button, it is indispensable to check all safety devices frequently for perfect
efficiency.
Any operation malfunction must be rapidly corrected by qualified personnel.It
is recommended to keep children well away from the operator working range.
15) CONTROL
Operator use allows the door to be opened and closed automatically. There are
different types of control devices (activated manually, by radio transmitter, access
controls with magnetic badges etc.) according to installation requirements and
characteristics. See the relevant instructions for the various control systems.
All operator users must be instructed on correct operator control and use.
16) MAINTENANCE
Before carrying out any maintenance to the operator, disconnect the system
from the mains power supply.
• Periodically check the system for oil leaks.
Top up with oil of the same type only (see data given in the table) and proceed
as follows:
a) Remove the plug "T" (Fig.1).
b) Top up using the prescribed oil until its level reaches 1.5 mm on the oil plug
hole.
c)Carefully refit all of the components.
WARNINg – The oil must be completely replaced every two years. It is strictly recom-
mended to use oil of the same type (see data given in the table).
• Check the safety devices of the automation.
When any operational malfunction is not resolved, disconnect the power supply
from the system and request the assistance of qualified personnel.