MAC8000 NOVEMBER 2010
1.0 INTRODUCTION
DREAGERprovides a range of breathing-airsystems which are completely
self-contained, fully mobile and specially designed to deliver breathing
quality compressed air to operatives wearing air-fed respiratory equipment
when working in hazardous atmospheres such as occur in the nuclear,
petrochemical, pharmaceutical and other industries. The Systems provide
breathable air conforming to EN 12021.
The MAC8000 is a fast towing unit with a two-cylinder, oil-cooled diesel
engine, driving a rotary screw compressor. A fully-automatic back-up
system is incorporated which maintains the air supply from reserves stored
in eight 9-litre cylinders.
When the air pressure or the reserve in the cylinders falls below a
permissible level, audible and visible alarms sound/flash at which time all
breathing-air apparatus wearers should immediately evacuate to a safe
area.
The unit has a centrally-mounted lifting eye and is enclosed within a steel
canopy which allows the correct air flow and access to all necessary parts
for both running and service. The unit is also sound attenuated to ensure
that the noise level is within the European regulations of <98LWA.
A hinged high-level air intake is provided which, in the operational mode, is
pivoted to the vertical. Off site the intake tube is lowered to the horizontal
position. The unit should be operated on reasonably level ground and sited
to prevent the re-entrainment of exhaust gases into the inlet. It should also
be kept well away from other polluted or toxic atmospheres.
All units are built for us in quality assured workshops under procedures
approved to ISO 9001:2000.
IMPORTANT
A qualified attendant should be in charge of the equipment during operation and
ensure that it is operated only, and strictly, in accordance with these instructions.
The attendant should check that all hoses are laid out without kinks or tangles, are
safe from interference or damage, and orifices of all couplings are clear of dirt.
If the unit switches over to cylinder supply, the attendant should immediately
instruct the operatives to leave the hazardous area.
