Calpeda I-MAT Serie Instrucciones De Uso página 33

9.3.2. Proportional pressure mode with 2
pressure transducers (differential 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 first transducer and the second transducer as
shown in section 6.7.
Parameters to programm or check (recommended
sequence):
Par.
Description
AP01
Maximum pump pressure
AP02
Primary transducer supply
Primary transducer
AP03
measuring unit
Primary transducer
AP04
minimum value
Primary transducer
AP05
maximum value
Secondary transducer
AP06
supply
Secondary transducer
AP07
measuring unit
Secondary transducer
AP08
minimum value
Secondary transducer
AP09
maximum value
AP10
Secondary transducer mode
UP02
Nominal pump current
UP03
Nominal pump frequency
UP05
Operating mode
UP06
Primary set-point
PP01 Percentage of the pressure
with zero flow
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.
In this operating mode the frequency converter
keeps constant the temperature.
For this operating mode must be defined the type of
I-MAT_Ed5 - Operating Instructions
system where the frequency converter will operate:
It is possible to have different configurations of this
Suggested value
operating mode related with the different types and
based on pump type
number of transducers installed:
data sheet
transducer
1 [bar]
data sheet
transducer
data sheet
transducer
For detailed program settings see the followings
configuration sections.
data sheet
transducer
1 [bar]
data sheet
transducer
9.4.1. Constant temperature mode with single
data sheet
transducer
DiFF
This configuration uses a feedback given by a
see motor plate
pressure transducer (connected as shown in
see motor plate
section 6.7).
PP
Parameters to programm or check (recommended
sequence):
on demand [bar]
50 [%]
9.4.2. Constant
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 first transducer and the second transducer as
shown in section 6.7.
Parameters to programm or check (recommended
sequence):
- Heating systems (HEAt): in these systems
an increase of the pump frequency will
correspond to an increase of the temperature
of the transducer.
- Cooling systems (Cool): in these systems
an increase of the pump frequency will
correspond a decrease of the temperature of
the transducer.
- Constant temperature with 1 temperature
transducer (absolute
transducer).
- Constant pressure
transducers in differential mode.
transducer (absolute
transducer).
Par.
Description
AP02
Primary transducer supply
Primary transducer
AP03
measuring unit
Primary transducer
AP04
minimum value
Primary transducer
AP05
maximum value
UP02 Nominal pump current
UP03
Nominal pump frequency
UP05
Operating mode
UP06
Primary set-point
tC01
System type
temperature
temperature transducers
mode)
or differential
with 2 temperature
or differential
Suggested value
data sheet
transducer
4 [°C]
data sheet
transducer
data sheet
transducer
see motor plate
see motor plate
tC
secondo richiesta [°C]
HEAt/Cool
mode with 2
(differential
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