Night Mode; Secondary Functions; Dry-Run Protection - Calpeda I-MAT Instructions Pour L'utilisation

9.7. Night mode

Night mode is an optional operating mode which
reduces the frequency of the system when the
temperature is below a certain value.
This option use a feedback of a temperature
EN
transducer connected as described in section 6.7.
(secondary transducer electrical connection).
Because on I-MAT only two analog inputs
are available, this option does not allow
other options or operating modes which
need 2 transducers (i.e. differential mode).
Parameters to programm or check (recommended
sequence):
Par. Description
AP06
Secondary transducer supply
Secondary transducer
AP07
measuring unit
Secondary transducer
AP08
minimum value
Secondary transducer
AP09
maximum value
AP10 Secondary transducer mode
AP18
Night mode enable
AP19
Night mode activation
AP20 Night mode activation time
AP21
Night mode disable threshold
At this point the symbol
frequency converter display.
The frequency converter will work at the minimum
operating frequency
temperature of the transducer goes below the
temperature set in parameter AP19 for the time
set in parameter AP20. The system will return in
normal mode when the temperature will rise above
the threshold value set in parameter AP21.

10. Secondary functions

ON

10.1. Dry-run protection

The frequency converter is equipped with a dry-run
protection for the pumps. When the pressure of the
system remain for a time higher than the dry-run
time (AP22) lower than the value of the dry-run
pressure (AP24) the protection system will stop the
pump.
It is possible to install up to 2 float switches for the
dry-run protection (see section 6.8 for electrical
connection).
Programming primary float switch
The float switch input is default active, parameter
AP40 is set on 2 (nO), parameter AP41 (restart
time) is set on 3s by default.
Through parameter AP41 is possible to set a restart
time from 1 up to 60 seconds.
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Suggested value
data sheet
transducer
4 [°C]
data sheet
transducer
data sheet
transducer
nMOd
On
on demand [°C]
on demand [s]
on demand [°C]
will appear on the
when the measured
Programming secondary float switch
The float switch input is default active, parameter
AP42 is set on 2 (nO), parameter AP43 (restart
time) is set on 3s by default.
Through parameter AP43 is possible to set a restart
time from 1 up to 60 seconds.
10.2. Enabling Max/Min curve operation
It's possible to connect to the frequency converter
an input signal to enable the operation with the
maximum curve or minimum curve. For electrical
connection see section 6.10.
It is possible to enable this operating mode by
changing the parameter AP44 on value 2 "nO" or 3
"nC" (function of the input configuration).
Set parameter AP45 on 1 if it is required which the
frequency converter operates at nominal frequency
(UP03).
Set parameter AP44 on 2 if it is required which
the frequency converter operates at minimum
frequency (SA03).
10.3. Enabling second set-point operation
It is possible to connect to the frequency converter
an input signal in order to use an alternative set-
point. For electrical connection see section 6.11.
It is possible to enable this operating mode by
changing the parameter AP46 on value 2 "nO" or 3
"nC" (function of the input configuration).
If the digital input is enabled the system does not
use the primary set-point (parameter UP06), but it
uses the secondary set-point (parameter UP07).
10.4. Enabling remote On/Off control
It's possible to connect to the frequency converter
an input signal to start and stop the pump from
a remote unit. For the electrical connection see
section 6.12.
This option is enabled by parameter AP47 on the
value "nO".
If the digital input is active the frequency converter
is stopped and the display shows "Off", otherwise
if the digital input is deactivated the frequency
converter will work normally.
10.5. Remote alarm settings
It's possible to connect to the frequency converter
up to 2 alarm signals. For electrical connection see
section 6.13.
Output signals are default active (parameters AP32
and AP34 set on value "On").
The parameter AP33 allows to select the activation
condition for the relay connected to terminals A1-
A5.
I-MAT_Ed7 - Operating Instructions