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15
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R
AP029
English
Characteristics / Preliminary operations
2.1 PRELIMINARY CHECKS
Before choosing the fi nal position of the mountings, it is necessary to:
• Choose the most suitable height on the gate leaf for the operator front mounting. If possible, it should be positioned halfway up the gate
leaf. As a rule, the ideal point is always in the strongest area, where the fl exing of the gate leaf has the least effect. If there is not a
broad strip of steel in the gate framework, then a suitable support needs to be welded on in the area where the front mounting is to be
positioned, in order to spread the load over a wide zone (
B1A
).
• Check whether the chosen area needs reinforcing or strengthening in any way. Make the same check on the gate leaf support posts.
• Before proceeding with the actual mounting, make a complete check on the gate-leaves, making sure that they are in good condition,
and not broken or damaged in any way.
• Check that the movement of the gate-leaves is uniform, and that the hinges have no play and do not rub.
• Check that the gate-leaves are plumb (when perfectly still at any point in the swing) (
B1B
); when the gates are completely closed, check
that the closure is even throughout the whole height of the gate-leaves.
• Using a dynamometer to measure from the end of the gate leaf, check that the opening and closing effort of the gate-leaves does not
exceed 15 kg (147 N). If the effort is excessive, then the hinges must be repaired so that the gate-leaves can be moved easily by hand
or, if repairs are impossible, the hinges must be replaced.
1.2 CHOOSING THE TYPE OF AUTOMATION
Before mounting, the type of automation must be decided on, on the basis of the characteristics and dimensions of the element to be operated.
The ZT 40 hydraulic operator, with its range of different versions, is compatible with the elements listed below.
Caution
• The right choice of the type of automation assures an effi cient operation of the unit and minimises the possibility of failures.
• The ZT 40 operator, if installed correctly, conforms to all the safety standards listed in the UNI 8612 publication.
List of versions:
A:
Hydraulic lock for opening only - special version (for gates opening outward)
B:
Double hydraulic lock for opening and closing (as an alternative to the other types listed)
C:
Hydraulic lock for closing only (with lock inaccessible when the gate is open)
S:
No hydraulic lock (gate leaf moveable by hand, when the operator is off, with no resistance from the operator - needs electric lock)
SF:
No hydraulic lock -braking action (the gate leaf can be moved by hand with a minimum of resistance, if moved slowly; there is also a
release device to facilitate opening -needs an electric lock -for use in windy zones)
Warning
!
•
The S, SF or C versions are recommended for use with solid gate-leaves (with the operator inaccessible when the gate is open).
• The A-B-C version models must not be fi tted on gate-leaves of length exceeding 2 m
4:
for leaves up to 7 m ZT 40 7M.
Warning
!
The peripheral speed of the gate leaf must always be less than 12 m/min. in order to conform to the UNI 8612 regulations.
Also, it is important to avoid the use of high-speed operators on wide gate-leaves as this could cause the gate leaves to
bang violently against the gate stop.
1.3 GENERAL CHARACTERISTICS
• The ZT 40 range of highly maneuverable hydraulic operators is produced in versions with different speeds and rod lengths, and either with or
without hydraulic locking, so that the operator can be used effectively on both large-size and small-size gate leaves.
• The version with hydraulic lock is also available with double hydraulic lock for the open and close position. This means that the closed
position is maintained without the use of an electric lock for gate-leaves of up to 2 meters, and the gate, when open, will not be blown
shut by strong winds (for instance, solid gate-leaves).
• Emergency release: allows the manual control of the gate (for use in the absence of electricity supply) for operators with hydraulic locking, with
a personalized key, easily accessible via a hatch on the upper cover of the operator, safe to use and easily maneuverable.
• “Non-crush” safety feature with sensitive valves, settable during installation.
92
90
B
50
A
C
121
AP029001
1052
732
270
A (mm)
B (mm)
C (mm)
MOD.
ZT 40 4M
1291
852
390
ZT 40 7M
AP029002
PLUMB LINE
AP029003
B1A
B1B
