BFT LEM7, Installation And User Manual

Page: 13 / 32

LEM7 LEM8F Ver. 01 -
13
D811025A_01
INSTALLATION MANUAL ENGLISH
5.2) Other positions
The gearmotor can be positioned in different ways. As an example, fig.5
illustrates a particular type of installation. In the case where the gearmotor
is not fixed on the level of the sliding track (
Standard position ), you must
ensure that the gearmotor is tightly secured also in relation to the gate
position, so as to maintain a correct play (1-2mm) between rack and
pinion. The current safety standards with respect to persons, animals and
things must be strictly observed, and in particular risks of accidents due to
squashing in the area of pinion-rack meshing, as well as other mechanical
risks, must be carefully avoided.
All the critical spots must be protected
by safety devices in compliance with the current prescriptions.
6) GEARMOTOR FITTING
After the concrete casting has hardened, look at fig. 6 and proceed as follows
•
Position an M10 nut in each of the tie rods, keeping them at a distance of
at least 25mm from the base, so that the gearmotor can be lowered after
installation or the play between pinion and rack can be subsequently
adjusted.
• Position a “P” plate supplied with each pair of tie rods, and use a level to
adjust the surface both ways.
• Remove the casing and screw-cover guard from the gearmotor, and position
the reduction gear unit over the four tie rods, with the pinion facing the
gate.
• Position the four washers and screw the four locking nuts on the gearmotor.
• Adjust the depth of the gearmotor by making it slide along the appropriate
slots provided in the base, keep an adequate distance between pinion and
gate for the type of rack to be fitted, and secure the gearmotor. The rack
teeth must mesh with the pinion over their whole width.
The section on “Rack fitting” gives the measurements and installation
method of the most widely used types of rack.
7) RACK FITTING
A rack having a 4 tooth pitch must be fitted to the gate. As far as the length
is concerned, this must include the passage space, as well as the space for
securing the brackets activating the limit microswitches, and for the pinion
meshing section. There are different types of rack, each one differing in
terms of capacity and gate fixing method. The Company markets three
types of racks, which are.
7.1) Mod. CFZ (Fig.7).
Galvanised iron rack - 22x22mm section - supplied in 2 - metre lengths -
capacity over 2000kg (
≈
20000N). First weld these pieces onto an adequate
iron angle bar and then weld the lot to the gate. Besides maintaining the
distance between the rack and the side of the gate, the angle bar makes it
easy to fix the rack to the gate, even when the latter is subject to slight side
slipping. When join welding the various rack pieces, you are advised to
arrange a section of rack as in (fig.8) to ensure a correct pitch along the
entire length of the rack.
7.2) Mod. CPZ (Fig.7).
Plastic rack - 22x22mm section - supplied in 1- metre lengths - max.
capacity 500kg (
≈
5000N). This model is to be fixed to the gate by means
of normal or self-threading screws. Also in this case, you are advised to
insert a section of rack the other way round in the joint between the various
pieces, so as to maintain the correct tooth pitch. This type of rack is quieter
and allows height adjustments to be made even after having been fixed,
using the slots provided.
7.3) Mod. CVZ (Fig.7)
Galvanised iron rack - 30x12mm section - supplied in 1 - metre lengths -
threaded spacers to be welded - max. capacity 2000kg (
≈
20000N). Having
fixed the spacers in the middle of each of the slots in the various rack pieces,
weld the spacers to the gate. Also in this case, arrange a section of rack the
other way round in the joining points of the various rack pieces to ensure a
correct tooth pitch. The screws which fix the rack to the spacers allow the rack
to be adjusted in height.
7.4) Rack fitting
To fit the rack, proceed as follows:
•
Activate the emergency release by rotating the appropriate release knob
(See paragraph “Emergency manoeuvre”).
• Rest the rack end on the control pinion and secure it (by welding or using
screws) in correspondence with the pinion, while sliding the gate along by
hand (fig. 9).
• In the case of incorrect gate alignment (excessive side curving) which
cannot be corrected, place a few shims between the rack and gate in order
to ensure continuous centring of the rack with respect to the pinion (fig.
10).
DANGER - The welding operation is to be carried out by a competent
person who must be provided with all the personal protection
equipment required by the current safety standards.
8) PINION ADJUSTMENT
Having finished fixing the rack, the rack-pinion play needs to be adjusted to
approximately 2mm (fig.6): this is obtained by slackening the four M10 nuts
under the gearmotor base by approximately 2mm, and then securing the four
upper nuts. Make sure that the rack and pinion are aligned and centred
(fig.10).
WARNING - Remember that the rack and pinion life strictly depends on
their correct meshing.
9) ELECTROMECHANICAL LIMITING DEVICES
The operation must be carried out with the emergency release activated
and the mains power supply disconnected. The runners which control the
limiting devices are to be positioned at both ends of the rack.
-
Push the gate fully open by hand.
- Position the opening end-of-stroke runner (fig.11) so that it intercepts the
microswitch control lever and makes it trigger. Having identified the correct
position, tighten the runner screws.
- Push the gate fully closed by hand.
- Position the closing end-of-stroke runner (fig.11) so that it intercepts the
microswitch control lever and makes it trigger. Having identified the correct
position, tighten the runner screws.
- The runners must lock the gate before this intercepts the mechanical
backstops placed on the track. The closing end-of-stroke runner adjustment
must be made in such a way as to leave a clearance of approximately
50mm between the gate and the fixed swing leaf, as prescribed by the
current safety standards, otherwise fit an electric edge at least 50mm thick
(fig.12).
10) GATE BACKSTOPS
DANGER - The gate must be provided with mechanical backstops, both
on opening and closing, in order prevent it from coming out of the upper
guide (fig.13); the backstops must be tightly secured to the ground, a
few centimetres beyond the electrical stop point.
11) ELECTRICAL INSTALLATION SETUP
Lay out the electrical installation as shown in fig.14 with reference to the CEI
64-8 and IEC364 provisions complying with the HD384 and other national
standards in force for electrical installation.
WARNING! For connection to the mains, use a multipolar cable
having a minimum cross section of 3x1.5 mm
2
and complying with the
current standards. (For example, if the cable is not protected, it must
be at least equal to H07 RN-F, whereas if it is protected it must be at
least equal to H07 VV-F with a 3x1.5 sq mm
2
cross section).
Connect the control and safety devices in compliance with the previously
mentioned technical installation standards. The cables (mains and auxil-
iary) must be distinctly separated. Fig.14 shows the number of connections
and their cross sections for a length of approximately 100 metres; for
greater lengths, calculate the cross section for the true automation load.
The main automation components are (fig.14):
I Type-approved adequately rated omnipolar circuit-breaker with
at least 3-mm contact opening, provided with protection against
overloads and short circuits, suitable for cutting out automation
from the mains. If not already installed, place a type-approved
omnipolar circuit-breaker with a 0.03A threshold just before the
automation system.
S Key selector.
AL Blinker with tuned antenna.
M Actuator
P Wall-mounted pushbutton panel.
Fte, Fre Pair of external photocells.
T 1-2-4 channel transmitter.
11) TERMINAL BOARD CONNECTIONS
First pass the appropriate electric cables through the raceways and fix the
various automation components to the chosen points, then connect them
following the directions and diagrams contained in the control unit instruction
manual.
Carry out phase, neutral and (compulsory) earth connections. The protection
wire (earth) with yellow/green insulating sheath must be connected to the
appropriate terminals marked by their symbol.
Operate the automation only after having connected and checked all the
safety devices.
A description of the terminals of MIZAR control unit installed on the actuator
is given below (fig. 16).
1-2 Single-phase power supply: (1=L) (2=N)
3-4-5 Motor connection (4 common, 3-5 operation and capacitor)
4-1
Blinker connection (mains voltage)
7-8 Open-Close push button, key selector (N.O.)
7-9 Stop push button (N.C.). If not used, leave jumped.
7-10 Photocell input or rubber skirt (N.C.). If not used, leave jumped.
Opening limit switch (N.C.). If not used, leave jumped.
Closing limit switch (N.C.). If not used, leave jumped.
13-14 24 Vac 180mA max output - power supply to photocells or other devices
15-16 Second radio channel output of twin-channel receiver board
Antenna input for radio receiver board (17 signal - 18 braid).
GND terminal