Ae : Enabling The Anti-Block/Anti-Frost Function; Setting Pump Start; Sf : Setting The Starting Frequency; St : Setting The Starting Time - DAB ACTIVE DRIVER M/M 1.1 Instructions Pour L'installation Et La Maintenance

AE : Enabling the anti-block/anti-frost function

8.6.8
It starts rotation of the motor-impeller assembly so as to avoid mechanical blockages due to low temperature or to
long inactivity. When the function is enabled, if the ACTIVE DRIVER measures a temperature that is too low and
with a risk of frost, it automatically starts to turn the electropump at a low number of revs (25Hz). Instead, if the
temperature is within a safety range and the ACTIVE DRIVER records long inactivity, to avoid blockages of
formations of residue it makes the electropump perform an unblocking cycle every 23 hours.
ATTENTION: Since a starting frequency close to the rated value is necessary for a certain time in order to ensure
the starting of a single-phase pump, whenever the anti-frost function starts up with the users closed there may be an
increase in the pressure of the system.
It is important to ensure that the electropump installed has a maximum head that the system can withstand.
Otherwise it is advisable to deactivate the anti-frost function.
8.6.9

Setting pump start

The minimum frequency at which a single-phase pump can be started is an extremely variable parameter, depending
on the pump model used. It has therefore been made possible to set the starting frequency and the time during which
that frequency must be maintained in order to guarantee the correct operation of any model. The pre-set values of SF
and St are a good compromise, but if the pump does not start, or starts with difficulty or slowly, increase SF or St
until good pump operation is reached. If there are problems of excess pressure at starting, it will instead be necessary
to decrease the SF or St parameters. In this case it is recommended to vary one parameter at a time in small steps and
to check operation. The phenomenon of excess pressure at starting is typically found only for very low SP vales (1.0-
1.5 bar) and it may be limited, but not completely eliminated, by decreasing the parameters indicated above.
8.6.10

SF : Setting the starting frequency

This is the frequency at which the pump has to be started for the time St.
The pre-set value is 45 Hz and it may be varied between Fn and Fn-50% using the "+" and "-" keys.
If a FL higher than Fn-50% has been set, SF will be limited to the value of the minimum frequency FL.
For example, for Fn=50 Hz and FL=0, SF may be set between 50 and 25 Hz; instead, if Fn=50 Hz and
FL=30 Hz, SF may be set between 50 and 30 Hz.

St : Setting the starting time

8.6.11
The parameter St represents the period of time during which the frequency SF is supplied before passing the
frequency control to the automatic system PI. The pre-set value of St is 1 second and it is the best value in the
majority of cases. However, if necessary, the parameter St may be varied from a minimum of 0 seconds to a
maximum of 3 seconds.
8.6.12

Setup of the auxiliary digital inputs IN1; IN2; IN3 with the parameters i1; i2; i3

(excluding A.D. M/M 1.1 and A.D. M/T 1.0)

The function assigned to each of the digital inputs IN1; IN2; IN3 may be activated or modified by means
of the parameters i1; i2; i3.
The setup of the parameters i1,i2,i3 may always assume the values:
0 => function disabled
1 => function active on high active input (see fig.3)
2 => function active on low active input (see fig.3)
ATTENTION: the parameter i3 alone may also assume the values 3,4 and 5 (as indicated in the table)
Table summarising the configuration of the digital inputs IN1, IN2, IN3
Parameter
With the
intervention of the
command the
system goes into
i1
block and alarm
status with
indication F1 on
the display.
With the
intervention of the
command the i2
active set point =
P1.
With the
intervention of the
command the
ACTIVE DRIVER i3
is deactivated with
indication F3 on
the display.
0 1
Protection
Each function is
against dry
disabled
running
F1 never
With input IN1
appears.
closed.
Each function is Active set point
disabled =P1
F2 never With input IN2
appears. closed.
Each function is
ACTIVE DRIVER
disabled
disabled
(default)
With input IN3
F3 never
closed.
appears.
ENGLISH
Value
2
Protection
against dry
running
With input IN1
open.
Active set point
=P1
With input IN2
open.
ACTIVE DRIVER
ACTIVE DRIVER
disabled
With input IN3
open.
48
3 4
- - - -
- - - -
ACTIVE
DRIVER
disabled.
disabled.
With input IN3
With input IN3
closed
open
+ eliminate
+ eliminate
blockages and
blockages and
reset.
reset.
5
- -
- -
Eliminate
blockages and
reset.