Planeta HD3N-EX, Руководство по эксплуатации и обслуживанию

Страница: 9 / 28

9
PLANETA PLANET PLANET
1861
Heben ohne Grenzen
6. Instructions for use
The following maximum, uninterrupted deployment times for the hoists must be
observed: Chain blocks are manual lifting devices which are not appropriate for
permanent operation in lowering operations. To avoid impermissibly high temperatures
of the friction plates, the max. uninterrupted usage times for applications in Ex areas
must not be exceeded : assuming a maximum ambient temperature of up to + 40°
celsius )
When lowering a max. deployment of approx. 3 m of uninterrupted lowering path
may not be exceeded, as the brakes heat up immensely during lowering.
After this 3 m working path (lowering) a pause of approx. 20 minutes is required
for cooling down the hoist brake.
Evenin the case of only slight wear of the surface-treated parts such as e.g.
chains, hooks, etc., these must be replaced with original spare parts. Defective
parts cannot be guaranteed to maintain Ex protection.
Ignitable dust deposits should be avoided on the hoists. Every day before
starting work free the hoist of dust deposits and make sure that no dust can
accumulate between the moving parts.
Repair work should only be carried out outside the potentially explosive area.
Protect the hoist from impacts, friction, rough handling and moisture.
During operation of the hoist it is important to ensure that the operator
wears conductive clothing (shoes, gloves). Gloves should have a conductive
resistance of <10 to the power of 8 ohms. Pulling off clothes may cause
explosive discharges and is therefore not allowed.
Electrostatically induced hazards of ignition can be prevented by grounding. In
Zone 1, grounding of the hoist is required! This must be done on the load hook,
or the load eye, when the hoist is connected to the appropriately grounded
parts. For trolleys, the surfaces of the wheels and rail may never be painted,
because these can lead to impermissibly high grounding resistance values.
Loads must be grounded during transport; separate grounding is necessary, for
example when using non-conducting load-securing devices. In order to prevent
in zone 1 but also in zone 2 that gases in group IIC, hydrogen sulfi de and
ethylene oxide do not generate mechanical sparks, then chain and load must
always be moved in such a way that the sliding and/or frictional contact with
other equipment or parts does not take place.
In order to ensure the proper level of grounding, rusty chains may no longer be
used in zones 1 and 2. Depending upon the degree of corrosion, the grounding
performance loss in the chain can be impaired to an unacceptable extent.