Cascade Mode Programming; Plant Starting - Calpeda I-MAT 5,2TT-A Betriebsanleitung

starts, AP26 allows to set the working frequency
and parameter AP27 allows to set the working time
expressed in minutes.
To disable this function set parameter AP25 to
"OFF" i.e. "0" value.
EN
10.9. Enabling the systems leakage control.
It's possible to enable a function that checks
the number of starts executed by the frequency
converter.
To enable this function change the value of
parameter AP28 to "On" and set the maximum
number of starts that could be done in 20 minutes
in the parameter AP29.
If the number of starts is more than the expected
the frequency converter will stop with the alarm
"Er12". Valido solo in pressione costante.
10.10. Enable motor heating system.
It's possible to enable a function that allows to
supply the motor even when the pump is stopped
or in stand-by.
Change the value of the parameter AP30 to "On"
and with parameter AP31 set the heating power
that must be provided to the motor.
10.11. Enabling Safe-start
Safe-start function prevent a peak of pressure in
the system pipework. Safe-start function operates
any time there is a supply disconnection of the
frequency converter.
To enable this function it is necessary to set
parameter AP49 to value "On".
At every disconnection of the supply voltage of the
system, when the supply is restored, the frequency
converter will start at a defined frequency
(selectable through the parameter AP52) and it
will operate at this frequency for a time, defined in
the parameter AP53. After that time the system will
return to operate in normal mode. If this option is
active in the master pump the safe-start function
will work even in cascade mode.

11. Cascade mode programming

ON
Make sure that the cascade mode expansion
board are properly connected, otherwise
it will be not possible to use the cascade
modes.Boosting set with 2-6 variable speed
pumps
After the electrical connection (see section 7.4),
set parameter AP11 on the value UU for each
frequency converter, define which frequency
converter will work on master mode and for this
frequency converter change the parameter AP12
from SLA (slave) to MAS (master).
For each other frequency converter define the
Page 44 / 164
address through the parameter AP13 ( SLA1,
SLA2, SLA3, SLA4, SLA5).
Boosting set with 1 variable speed pump and 1-5
fixed speed pumps
After the electrical connection (see section 7.4),
set parameter AP11 on the frequency converter on
the value "UF" and the parameter AP54 with the
number of pumps of the booster set (Both fixed
speed pumps and variable speed pumps).
11.1. Enabling twin-pump operation
This operating mode works only with 2 pumps and
works with the followings operating modes:
- Constant pressure mode
- Proportional pressure mode
- Constant temperature mode
- Constant flow rate mode
In this operating mode only one pump works and
the other one is for total reserve.
To enable twin-pump mode the parameter AP11
must be set to "dP", define which frequency
converter works as master "MAS" and on this
converter change the parameter AP12 to "MAS".
Only on this frequency converter should be
connected all the transducers and signals.
11.2. Alternating pumps function
Alternating pumps function allows a more uniform
use of the pumps. This function is active by default
(parameter AP48 is set to "On") and it's possible
to change the alternating time, in minutes, through
parameter AP49.

12. Plant starting

OFF
After completing hydraulic and electrical connection
and checked the preloaded pressure (for booster
set with membrane tank), start the plant as
indicated below:
Prime the pumps (see the pumps' instructions).
Pump with suction lift:
- Fill the suction pipe and the pump body by means
of the plug hole located close to the delivery port
of the pump.
- Fill the suction tube by pouring water through the
plug hole on the suction manifold of the pump.
Pump with positive suction head:
Open the gate-valve in the suction pipeline.
With sufficient head, the water will overcome the
resistance of the non-return valve fitted in the
suction side of the pump and will fill the pump body.
Otherwise, prime the pump with the plug hole near
the delivery port.
I-MAT_Ed6 - Operating Instructions