HARBEN CENTURY, Service Manual

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Flowplant Century Pump Manual
POTENTIAL HAZARDS AND MISUSE OF HIGH PRESSURE EQUIPMENT

Before starting work, check and ensure the drain jets have no blocked holes
or nozzles as this may cause the pumping system to over pressurise which
could result in burst disc failure or bursting the jetting hose.

Never attempt to unblock a fully choked drain or pipe before considering the
consequence of releasing the blockage and having a plan to deal with it. E.g.
flooding, material ejection, drain nozzle ejection.

Never attempt to clean drains or pipes in one pass because this could lead to
debris build up behind the jet nozzle causing a pressure build up in the
drainage system. Be aware that a pressure build up in the drain or pipe could
cause the jet nozzle to be ejected at speed back towards the operator.

Never enter the manhole to either place the jet nozzle into or extract it from
the drain entrance unless the required confined space regulations have been
met.

Never work in a manhole with a radio remote control transmitter that is not
classified for use in such areas.

Never use the hydraulic hose reel facility as a winch to retract a jetting hose
that has become stuck in the drain or pipe. Damage to the hose could be
caused that will make subsequent hose failure more likely.

Never allow jetting hoses to become kinked and always remove from service
any jetting hose with an outer cover that has worn through to the reinforcing
braid.

Never use the high pressure jetting hose for any purpose other than sewer,
drain or pipe cleaning, e.g. winching vehicles or other plant.

Never use jetting nozzles and/or accessories that have not been calibrated for
the jetting machine pump performance as this could cause rapid over
pressurisation catching operators unaware.

Never attempt to clean a drain or pipe with a nozzle that has more forward
force than rear force. It could be ejected back toward the operator
causing injury.

Never attempt to clean a drain or pipe with a chain flail type jet that has
unequal chain lengths as this could lead to severe vibration and high pressure
hose failure.
Failure to follow the instructions where this
icon is shown can result in serious injury
or even death
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