25
Object
Checklist
Atmosphere
Check the nameplate of unit corresponds with the sites potentially explosive
atmosphere classification.
Temperature
Check that ambient temperature falls within lubricant gra- de recommendations.
Installation
Check that no potentially explosive atmosphere exists during installation.
Ventilation
Make sure that screw jack unit is sufficiently ventilated with no external heat input –
cooling air temperature should not exceed 40°C.
Fitted equipment
Check motors, couplings or any other equipment fitted to the screw jack unit has
ATEX approval.
Environment
Check that the information listed on nameplates cor- respond to the environmental
conditions of the site.
Gearbox
Ensure gearbox is not subjected to any loading greater than those marked on the
nameplate.
Motor
For units operated with inverter drives, check motor suita- bility for use with the
inverter. Ensure that the inverter pa- rameters do not exceed those off the motor.
Belts
For belt driven units, check all belts fitted are of sufficient electrical leakage
resistance (< 109 W).
Electrical equipment Ensure screw jack unit and other equipment is electrically grounded (Earthed).
Guards and covers
Check and adjust guards and covers so that there is no ig- nition source from sparks
that may be thrown by moving parts making contact with guards etc. Ensure coupling
guards, covers etc are dust tight or are designed in such a way that a build up of dust
deposits cannot form when the unit is used in Zone 21 & Zone 22 classification areas.
5.4.2 Units for use in a potentially explosive atmosphere
NOTE: DAMAGES DURING TRANSIT!
If the unit has been damaged in transit do not use. (Re- move all transport fixtures and
packings prior to start up).
DANGER: RISK OF FIRE/EXPLOSION!
In the event of fire or serious overheating (over 300°C), certain materials (rubber, plastics,
etc.) may decompose arid produce fumes. Care should be ta- ken to avoid exposure to
the fumes, and the remains of burned or overheated plastic/rubber materials should be
handled with suitable gloves.
DANGER: RISK OF FIRE/EXPLOSION!
correctly installed and operated the equipment complies to 94/9/EC ATEX 100a as marked
on the nameplate. Failure to comply could lead to severe or fatal injury.