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Pressure / vacuum- or flow control of the blower
performance
Part no.
123 021 049
123 030 248
In case you wish to use the blower´s built in PID con-
trol to maintain a fixed pressure/vacuum or volume/
air speed from the blower, a pressure/vacuum- or flow
control unit must be connected to the blower´s control.
Kongskilde recommends to utilize Kongskildes stand-
ard pressure/vacuum- or flow control device for auto-
matic operation.
In both the pressure/vacuum- and flow control package,
an external differential pressure transmitter is used, in
addition to either an pipe mounted orifice or pipe in-
stalled pressure gauge. Both packages also includes
hose and fittings.
IMPORTANT: The pressure transmitter must be mount-
ed on firm ground without vibrations, ie. not onto the
pipe system or the blower. Since turbulence can occur
in the piping close to the blower, it is recommended to
mount the flow measuring rod at a distance of at least
20 x pipe diameter from the blower or any bends. In
case the distance is less, the flow / air velocity is still
kept constant, but the read out values may be encum-
bered a minor error.
The pressure gauge must be located in the pipe string
at the point where you want the pressure / vacuum to
be kept constant. It can, in principle, be both on the
suction side and on the pressure side.
When connecting pressure/vacuum- or flow control
units, the wires from the differential pressure transmit-
ter must be connected to the blower´s terminal block as
follows:
1 - The main switch is switched off and locked
2 - Guide the differential pressure transmitter´s wire
through an M20 cable relief (not supplied), and through
the control box bottom. Fasten the screw connection in
the control box.
3 - The terminals are released with a small screwdriver,
and the wires installed according to the diagram:
•
terminal 1 (+24VDC) to terminal 2 of the transmitter
•
terminal 10 (4-20mA signal) to the terminal 1 of the
transmitter
•
if needed, a connection from terminal 2 (0VDC) to
the transmitter should be established, in case this
is needed for the transmitter (not required at Kong-
skildes flow- or pressure transmitter).
•
fit a 500 ohm resistor (is installed from Kongskilde)
4 - The cable gland is tightened and the control cabinet
is closed.
Type
Pressure control unit
Flow control unit
5 - The differential pressure transmitter´s lid is re-
moved, and the transmitter is mounted onto a vibration-
free surface.
6 - the wires are connected according to the diagram,
and the lid is reinstalled.
7 - The hoses from the aperture (at flow control) or
pressure outlet (at pressure control) are connected ac-
cording to the illustration. 4 m of clear hose is included,
this can be extended if needed. Power is reconnected
on the main switch.
The power on the main switch is connected.
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