Calpeda I-MAT Serie Instrucciones De Uso página 35

AP03 and AP05 to the right transducer full-scale.
Set parameter AP06, to defi ne the supply of the
transducer, AP07 on 1 (bar) and the parameters
AP08 and AP09 to the right transducer full-scale.
Set parameter AP10 on "DiFF" value.
To allow the system to work properly, the
primary transducer (B1-B4 clamps) must be
always connected to the delivery pipe, and
the secondary transducer (B5-B8 clamps)
must be always connected to the suction
pipe.
9.3.3. Enabling stop at minimum frequency.
The proportional pressure mode provides that
the pump never stops. If it is required to stop the
pump when it's working at the minimum operating
frequency (parameter SA03) it's necessary change
the value of the parameter AP16 from "Off" to "FM".
The system will restart when the difference between
the set-point pressure and system pressure
becomes lower than the value of parameter PP08.
9.4. Constant temperature operating mode.
Constant temperature operating mode keeps
constant the temperature at a point in the system.
To enable this operating mode it is necessary to
set the parameter UP05 on "tC". In this operating
mode the frequency converter keeps constant the
temperature at a set-point value decided by the
user through parameter UP06.
For this operating mode must be defi ned the type of
system where the frequency converter will operate:
- Heating systems:
an increase of the pump frequency will
correspond to an increase of the temperature
of the transducer.
- Cooling systems:
an increase of the pump frequency will
correspond a decrease of the temperature of
the transducer.
To choose the type of system it's necessary to use
the parameter tC01, that could be set to "HEAt" for
heating systems, and to "Cool" for cooling systems.
It is possible to have different confi gurations of this
operating mode related with the different types and
number of transducers installed:
- Constant temperature with 1 temperature
transducer (absolute
transducer).
- Constant pressure
transducers in differential mode.
For detailed program settings see the followings
confi guration sections.
I-MAT_Ed1.indd - Operating Instructions
in these systems
in these systems
or differential
with 2 temperature
9.4.1. Constant temperature mode with single
transducer (absolute
transducer).
This confi guration uses a feedback given by a
pressure transducer (connected as shown in
section 6.7). To allow this transducer work properly
it is necessary to set parameter AP02 (to defi ne
the supply of the transducer), parameter AP03 to
4 (°C) and the parameters AP03 and AP05 to the
right transducer full-scale (refer to the datasheet of
the transducer).
9.4.2. Constant temperature
temperature
mode)
If it is required to use a differential pressure
feedback, between delivery and suction of the pump
by using 2 transducers it's necessary to connect
the fi rst transducer and the second transducer as
shown in section 6.7.
Set parameter AP02, to defi ne the supply of the
transducer, AP03 on 4 (°C) and the parameters
AP03 and AP05 to the right transducer full-scale.
Set parameter AP06, to defi ne the supply of the
transducer, AP07 on 4 (°C) and the parameters
AP08 and AP09 to the right transducer full-scale.
Set parameter AP10 on "DiFF" value.
9.4.3. Automatic pump
frequency.
In this operating mode typically the pump runs
continuously without stop. If it is required to stop the
pump when it's working at the minimum operating
frequency (parameter SA03) it's necessary to
change the value of the parameter AP16 from "Off"
to "FM".
The system will restart when the temperature of the
system will reach the value of parameter tC02.
9.5. Constant fl ow operating mode.
Constant fl ow rate mode keeps constant the fl ow in
a point of the system. To enable this operating mode
it is necessary set the parameter UP05 on "CF". In
this operating mode the frequency converter keeps
constant the fl ow at a set-point value decided by
or differential
mode with
transducers (differential
stop at minimum
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