Bauer mariner 320 Instruction Manual - Instruction Manual
WARNING
WARNING
WARNING
Instruction Manual
Breathing Air Compressors
18
-
Press ON button (2).
Abb. 14 Compressor control unit
1
2
3
Units with petrol engine:
Open condensate drain valves on the filters to release pres
sure, so that motor starts without load.
Set choke to position START. Start engine with recoil starter
or crank handle. As soon as motor runs smoothly return
choke to normal operating position.
All units:
Close condensate drain valves tightly (spring pressure alone
may sometimes not be sufficient for higher pressures) and
run unit to final pressure. Check final pressure safety valve
and pressure gauge.
As soon as final pressure is reached and final pressure safety
valve blows off, open condensate drain valves and drain con
densate - unit is ready for filling operation.
3.5.
FILLING PROCEDURE
General
Ensure intake air is free from
noxious gas (CO), exhaust fumes and
solvent vapour. On units employing
petrol or diesel engine it is most important to use an
intake hose and observe that only clean air is drawn in.
The intake hose is also recommended for units with
electric engine. When operating the unit in areas with
possibly high CO contents, the CO removal filter car
tridge is recommended for electric driven units, also.
Note that for CO contents of more than 25 ppmV in the
intake air the allowed limits cannot be guaranteed even
with a CO removal filter cartridge, resulting in a life-
threatening CO concentration! Also, due to chemical re
action of CO with hopcalite, warming up of the car
tridge and danger of fire may result.
Filling hoses must be in satisfactory
condition and threads undamaged.
Pay particular attention to damage
on the interface from hose fitting to hose. If the casing
is scored, hose must be discarded.
The filling valve connection is of the manual type and permits
connection to air tanks without using tools. An O-ring is
provided for self-sealing due to internal overpressure.
Compressed air tank filling valves for a pressure in excess of
200 bar are standardized (DIN 477, sheet 5) and connectors
for 200 and 300 bar are different and cannot be mixed up.
The use of adapters is not allowed!
To ensure safe air tank removal after filling, the valve has an
integral venting bore. Therefore always close tank valve first
before closing filling valve. During filling procedure bottles
will warm up due to recompression. After removing, allow to
cool down, bottles may then be reconnected and topped up
to the respective maximum filling pressure.
To meet the CO
2
maximum rating
value in breathing air bottles, please
observe the two following chapters
”Intake air quality” and ”Scavenging the compressor
unit”.
Intake air quality
At routine tests, CO
2
values beyond the permissible values are
noted from time to time. Closer investigations often show
that the compressed air is taken from rooms in which one or
more persons are working. At insufficient ventilation, the
CO
2
value in the surrounding air can increase quite fast be
cause of the exhaling of CO
2
. CO
2
values from 1,000 to 5,000
ppm
v
in workrooms are not unusual (MAK-value (max. work
room concentration) is 5,000 ppm
v
). Another additional in
crease is caused by cigarette smoking, producing approx. 2g
CO
2
(
2,000 ppm
v
) per cigarette. These pollutions add up
to the basic pollution of approx. 400 ppm
v
. The technically
caused excessive increase of CO
2
during the filling process
and the CO
2
peak at taking the unit into operation. Because
of the reasons stated above and for your own security,
the filling of breathing air bottles is not allowed in
rooms used as workrooms.
Scavenging the compressor unit
CO
2
is present in the atmosphere with a natural amount of
350 to 400 ppm
V
. The molecular sieve used in the purifier for
drying the breathing air is, as well as other capabilities, able
to adsorb CO
2
which is accumulated in the cartridge. After
shut-down of the compressor, adsorbed CO
2
may be de
sorbed again due to the partial pressure decrease. The now
free CO
2
then gets washed out of the cartridge when the
compressor is started again. To avoid increased CO
2
contents
in the compressed breathing air, we recommend to flush the
compressor unit 1 to 2 minutes prior to connecting the
bottles, i.e. to let the air escape into the surroundings.
Connecting the bottles
-
Connect air bottle to filling valve (see Abb. 15).