Fine adjustment and switching differential is set with the adjusting screw
2
.
The screw
3
is sealed with a protective coating. It is not to be adjusted.
4.9.3 Option C10
Speed monitor
The speed monitor measures the rotational speed of the blower block.
4.9.4 Option C11
Unloaded start valve
The unloaded start valve prevents the machine starting against a load in the star-delta phase. The
valve closes when the motor starter switches from star (Y) to delta (Δ).
Fig. 12 Unloaded start valve
The unloaded start valve is factory set.
Functional description
Fig. 13 Diagram of the unloaded start valve
1
Air network
2
Adjusting screw
3
Nozzle
4
Diaphragm chamber
5
Valve cone
When the machine is shut down the valve cone
5
is open.
When the machine is started, air passes through the blow-off aperture to atmosphere.
4
Design and Function
4.9
Options
30
Installation and Operating Manual Rotary lobe blower
HBPI pr
Number: 9_9572 28 USE