User manual

page 33
Cyclon Series User Manual – Commissioning
2. NEGATIVE REGULATOR (Modulating
Control Only)
During commissioning or after a period it will be
necessary to adjust the delivery air pressure and
the negative regulator as follows:
1. Open the shut-off valve to the user’s pipework.
2. Create a downstream air bleed to simulate a
demand for air by opening the drain valve of
the downstream air receiver, if installed, or
opening a valve in the user’s pipework.
3. Remove the LH side panel to gain access to
the negative regulator.
4. Switch the power supply ‘ON’ at the isolator.
5. Use the Program Mode to set the P1 and P2
set points.
Note: Set P2 at the required full flow delivery
pressure and P1 at 0.4 bar above this pressure.
6. Start and run the compressor.
7. Release the locknut on the negative regulator
spindle and turn the adjusting knob counter-
clockwise until the inlet valve on the suction
regulator starts to modulate.
8. Adjust the knob on the negative regulator
clockwise until the suction regulator inlet valve
modulates between P1 and P2 set points.
Note: The suction regulator must begin to
modulate at the P2 set point (an example for 7.0
bar working delivery pressure is shown below).
9. Use the pressure display on the control panel
for fine adjustment of the negative regulator.
10. Tighten the locknut on the negative regulator
adjusting knob.
11. Refit the access door and close the receiver
drain valve or other downstream valve used to
simulate compressed air demand.
Note: The suction regulator must begin to
modulate at, or before, the maximum working
pressure rating of the compressor.
0
10
20
30
40
50
60
70
80
90
100
6·9 7·0 7·1 7·2 7·3 7·4 7·5
P1
SET POINT
P2
SET POINT
PRESSURE
BAR
SUCTION REGULATOR
% MODULATION
NEGATIVE REGULATOR SETTINGS