Bleeding; Checks And Adjustments; Checking And Adjusting The Thrust Force; Emergency Manoeuvre - Use Of The Manual Release - Aprimatic ZT4 C Manual

Final operations
Fit the protective sheath to the power supply cable (E5 pos. 5)
if necessary.
Caution
One drop of hydraulic oil coming out of the duct created by the
screw elimination (E5 pos. 4) is normal.
Information
After installation, an appropriate warning sign must be attached
to the gate (E6 pos. 2.)
When completely assembled, the operator should appear as shown
in the fi gure (E6 pos. 1).

4.5.5 Bleeding

!
Warning
Before proceeding in setting the operator, bleed it.
Start the operator after having checked the setting of the pressure
relief valves and move it to stroke end either in open or close
position. Rotate on the key (see paragraph 6) and lock and unlock
the operator a dozens of times.
5.

CHECKS AND ADJUSTMENTS

5.0
CHECKING AND ADJUSTING THE THRUST
FORCE
With the gate leaf moving, measure the thrust force at the end of the
gate leaf, using a dynamometer (E7 pos. 1).
The thrust force must never exceed 15 Kg (147 N).
If necessary, adjust the working pressure of the operator.
Using a broad, flat-headed screwdriver, turn the control valves
clockwise to increase the pressure and counter-clockwise to
reduce it.
Adjust both opening (silver - E8 pos. 2) and closing pressure (gold
- E8 pos. 1).
Caution
• The opening thrust of the gate leaf should be set slightly
higher than the closing thrust.
• After making the settings, make another check with the
dynamometer to see if the thrust force corresponds to the
setting; if it doesn't, then the setting needs to adjusted
again.
• If the gate leaf requires an excessively high pressure to move
it, then make another thorough check of the mechanical parts,
the plumb and the free movement of the gate leaf itself.
6.0 EMERGENCY MANOEUVRE - USE OF THE
MANUAL RELEASE
In the event of a power failure, release the operator in order to open the gate by hand.
To gain access to the release valve, it is enough to loosen the screw (E9 pos. 2) and open the small cover (E9 pos. 3) by rotating it.
Unlock the operator by turning the triangular key provided (E9 pos. 1) counter-clockwise.
After the operation, re-lock the operator by turning the key clockwise.
!
Warning
After locking and releasing operations, remember to re-close the cover.
E5
E6
2
E7
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