Atlas Copco FD1200, Instruction Book

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Instruction book Oil-free Air Division
2.4 Pictographs (Fig. 9)
3 OPERATING INSTRUCTIONS
Safety precautions
The operator must apply all relevant safety precautions,
including those mentioned in this book.
Altitude operation
Consult Atlas Copco if operating above 3000 m.
Moving/lifting
The dryer can be moved by a lift truck using the slot in the
frame. Make sure that the forks protrude from the other side of
the frame. The dryer can also be lifted after inserting beams in
the slot. Make sure that the beams cannot slide and that they
protrude from the frame equally. The chains must be held
parallel to the bodywork by chain spreaders in order not to
damage the dryer. The lifting equipment must be placed in
such a way that the dryer will be lifted perpendicularly. Lift
smoothly and avoid twisting.
3.1 Initial start (Fig. 10)
1. At least 4 hours before starting, the mains supply to the
dryer must be switched on to energize the crankcase heater,
which warms up the oil. The indicator lamp (H1) is then
alight.
2. Open the refrigerant shut-off valves (2-Fig. 4a / 4 and 7-
Figs. 5) as follows: take the protecting cap off the valve,
then screw the spindle fully out and refit the cap.
3. On air-cooled dryers, press run/stand-by button (S1). Check
that the sense of rotation of the fan motor is correct. Cooling
air must be drawn in through the condenser (3-Figs. 4) and
blown over the refrigerant compressor (M1-Figs. 4) to
outside the dryer. If wrong, switch off the voltage and
reverse two of the three phase connections at the mains
terminals.
3.2 Starting (Fig. 10)
1. Switch on the voltage at least 4 hours before starting to
energize the crankcase heater. Never start the dryer without
preheating as this may cause serious damage to the
refrigerant compressor.
Check that voltage on indicator lamp (H1) is alight.
2. On water-cooled dryers, open the cooling water shut-off
valves.
3. Press run/stand-by button (S1). Check that dryer on
indicator lamp (H2) is alight.
4. If the air inlet valve is closed, open it a little to pressurize
the dryer gradually; open the valve when the dryer is
pressurized.
5. Approx. 5 minutes later, load the dryer by opening the air
outlet valve.
Close the by-pass valve if installed.
6. After approx. 10 minutes, the nominal pressure dewpoint
temperature will be reached.
1. Switch off and depressurize the dryer before starting
maintenance or repairs
2. Manual condensate drain
3. Automatic condensate drain
4. Pressure dewpoint
5. Dryer on-off
6. Voltage on
7. Dewpoint alarm
Fig. 9. Pictographs