FOG QUADRA 493 9021, Installation Operation & Maintenance

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QUADRA
21
E 167 - GB - 6
Rue du Pré Neuf - 58440 MYENNES FRANCE
493 9021
493 9031
COMMISSIONING THE AUXILIARY LIFT
• Turn the handle on the three way valve to ‘AUXILIARY’.
• In the enclosure (X5), put a link wire between terminals 8 and 9 in order to deactivate the
photo cell.
• Rotate the control knob towards RAISE so that the drive ram fills with oil.
• Open bleed screw (A Fig. 18) on the drive ram to expell any air in the system, when this is
completed re-tighten the bleed screw and check for leaks.
• Open the two way valve located on the inside of the fixed track (Fig. 19).
• Rotate the control knob towards RAISE, so that the slave ram fills with oil.
• Connect the oil return hose onto the ram.
• As above, open the two bleed screws (B) and (C), on the rams, to expell any air in the system,
when this is completed, re-tighten them and check for leaks. Operate the system, to fully extend
the slave ram.
• Close the two way valve again on the inside of the fixed track and lower the platform by
rotating the control knob to LOWER and opening the bypass valve.
• At about 150mm from the track upper surface, the auxiliary will stop lowering and the buzzer
will sound.
• Release the rotary control knob and activate it again in order to start lowering the auxiliary
again.
• Raise and lower the auxiliary several times and check if the two platforms are at the same
height (a slight offset under load is acceptable).
If correction is necessary, this can be achieved by increasing or decreasing the spare oil
capacity between the two rams by means of the two way valve.
• Adjust the light beam of the photo cell onto the reflector (taking into account a slight offset
under load).
• Remove the link (8 - 9) wire in (X5).
NOTE: The buzzer sounds as soon as the auxiliary lift reaches its lower limit switch.
It is also normal for it to operate whilst the lift is lowering.
Fig. 18
Fig. 19
SLAVE DRIVE
FIXED END-STOP
2 WAY VALVE
for levelling
SOLENOID
Emergency lowering