The Ultromat
®
is fitted with two electrical stirrers as standard. A third stirrer
for chamber 3 can be selected via the identity code. The stirrers ensure
that the solution is gently agitated in the reservoir chambers.
5.2.7 Control cabinet
The control cabinet contains, alongside the power supply and the fuses, all
the electrical control and command devices necessary for operation of the
system, especially the Ultromat
®
control and the frequency converter for
control of the powder feeder.
5.2.8 Power Socket for connection of a powder feeder device
The Ultromat
®
has a power socket for connection of a powder feeder
device. The power socket is secured to the dry feeder and is electrically
protected by a circuit breaker.
5.2.9 Concentrate piping
The Ultromat
®
is equipped with the following pipework for dosing of liquid
concentrate:
Ultromat
®
type
Pipe diameter
Tube nozzle
400
DN 15
DN 15
1000
DN 15
DN 15
2000
DN 15
DN 15
4000
DN 20
DN 20
6000
DN 20
DN 20
8000
DN 20
DN 20
5.2.10 Evaluation of the lack of water state for the redilution unit
The redilution unit is used to redilute the prepared polymer solution. To do
this the feed pump transports the polymer solution out of the Ultromat
®
storage tank into the redilution unit.
The dilution water is fed into the redilution unit via a solenoid valve. A
downstream float flow meter with a minimum contact monitors the dilution
water.
The Ultromat provides a potential-free contact (feed pump enable) for con‐
trol of the feed pump. This contact is closed if the level undershoots the
low flow contact in chamber 3 and opens once the low flow contact is
exceeded again. The feed pump is normally controlled using an external
circuit (combination starter motor).
As the feed pump can be switched on and off externally, there is an addi‐
tional input at the Ultromat control for determining the state of the motor
starter (potential-free auxiliary contact). The evaluation of the min. contact
at the flow meter is only carried out if the feed pump is running and conse‐
quently the potential-free auxiliary contact at the motor starter has been
closed.
If the feed pump is stationary, the potential-free contact is not closed and
the min. contact at the flow meter is not evaluated.
Design and function
23
