8
2.5 BY-PASS VALVES ADJUSTMENT
The Model 400 has an anti-crushing safety device which limits
the operator’s force when an obstacle is encountered while
the gate is moving. Follow these steps to adjust the intervention
threshold of the anti-crushing system:
• Lift the protective cap (Fig. 13, Ref.1) and insert the supplied
key (Fig. 13, Ref. 2).
• Turn the key 90°clockwise to open the cover.
• Lift the cover (Fig. 14).
• Remove the screw (Fig. 14, Ref. 3) which secures the knob
and then remove the knob (Fig. 14, Ref. 4).
• Locate the force adjustment screws (By-Pass) on the
operator (Fig. 14, Ref. 5 and 6) .
• OPEN pressure screw (green wording): gate opening
direction.
• CLOSE pressure screw (red wording): gate closing
direction.
• To reduce torque, turn screws counter-clockwise.
• To increase torque, turn screws clockwise.
• Test the bypass adjustment by physically obstructing the
gate during its travel and make corrections as appropriate
• When you have finished making adjustments, re-position the
knob (Fig. 14, Ref. 4) and tighten the screw (Fig. 14, Ref. 3).
• Close the cover and lock it by turning the key counter-
clockwise.
Figure 11
Figure 13
Figure 12
15.)
Connect the power cable to the operator and fasten
the screws (Figure 14A).
3 FINAL OPERATIONS
Finish the installation procedure as follows:
• Close the cover of the release device with the key.
• Remove the vent screw (Fig.12, Ref. 2).
Figure 14
Figure 14A
WARNING: Do not overtighten the screws to
compensate for a damaged gate.
WARNING: Failure to remove the vent screw may
result in erratic operation.
