ModvlvS Kascata User manual

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 1 of 6 Rev.3 - 12/01/2017
Return to the
storage tank
Supply from the
storage tank 60 °C
Hot domestic
water 45°C
Water supply 10°C
Supply from the
storage tank 60 °C
Supply from the
storage tank 60 °C
Return to the
storage tank
Return to the
storage tank
Hot domestic
water 45°C
Hot domestic
water 45°C
Water supply 10°C
Water supply 10°C
SAFETY: These instructions contain the basic information to install and to put in working correctly ModvFresh
pump units that form the Kascata system; therefore you must consider them as a supplement of the instruction
sheets enclosed to each pump unit. Therefore, before starting the installation, we suggest to read carefully the
mounting and the setting working instructions, in order to avoid accidents and failures caused by an incorrect use of
the product. Please keep this manual for future consultations.
(D) ModvSlave
Secondary
servomotors (slaves)
24 volt AC/DC with fast
actuation time of 5 seconds.
They get the control signals
from ModvMaster and
consequently start up or stop
the pump units on which they
are installed.
ModvSlave servomotors
must be placed on the
cold water inlet ball valve
of all ModvFresh pump
units except the number 1;
you can nd more precise
installation directions
in the sections
“hydraulic connection
scheme” and “electric
connection scheme”.
(C) ModvMaster
Primary servomotor
(master) 24 volt AC/DC, 35
seconds working time. It
contains the control software
of the whole system and, by
getting the information sent
by VFS sensor, it controls the
ModvSlave servomotors.
ModvMaster is placed on
the cold water inlet ball
valve and the pump unit on
which is placed is identied
with the number 1.
D
C
A
List of features of main components
ON-OFF 2-way ball valve
for drinking water, with
bronze body.
Equipped with housing
system to install
ModvMaster and
ModvSlave sevomotors.
(E) VFS sensor
Flow sensor VFS 10-200 l/min.
It is installed on the supply water
network (before the installation)
and connected to the special signal
converter, that sends the ow
information to ModvMaster.
E
B
(A) ModvFresh pump units
That can be installed on cascade in a number variable from 2 up to 5.
Place the pump units of the Kascata system near by the buffer tank.
If the cascade system requires a recycling line, to make the
installation easier we suggest to set up the recycling unit as the last
element of the cascade.
(B) Ball valve
TAKE CARE: The numbers that identify the pump units and by means of which it is possible to manage the working of the system,
are given at random to ModvMaster servomotors (always number 1) and Modvslave (from 2 up to 5, according to the number of pump
units of the installation) linked to them. The servomotors programming is made directly at the factory, therefore any further operation
on the components during the installation is not necessary, except the electric wiring and the hydraulic connection.
E70005980

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 2 of 6 Rev.3 - 12/01/2017
Hydraulic connection scheme
REMARK: Approximate scheme only. temperature values marked with an asterisk (*) have to be
considered as nominal. For more information, please refer to the section “eld of utilization”
Water
supply (10 °C)*
Users
Supply from the storage tank (60 °C)*
Return to
the storage
tank
Recycling (where present)
HDW to users (45 °C)*
(1)
Master
VFS 10-200 l/min
(2)
Slave
(3)
Slave
(4)
Slave
(5)
Slave
Do the hydraulic connections following the scheme of picture 1. We underline that the scheme here represented is to be considered as not
compulsory but, as a rule, it is the most suitable feasible solution from the plant simplication point of view.
Go on with the carrying ou of the installation by preparing each pump unit to be connected to the common pipings, by placing on the pump
units the special valve for the housing of ModvMaster and ModvSlave servomotors; this valve, as it is not symmetric, must be connected
in accordance with the ow direction (please take as a reference the arrow on the body of the valve).
Picture 1: Schematization of an installation to supply hot domestic
water (HDW), managed by ModvFresh Kascata control system.
Directions concerning the system equipped with recycling line:
If in the cascade system is foreseen the recycling line too, it has to
be made, during the installation of the components, placing the only
ModvFresh with recycling as last unit.
For instance, if we want to make a 4 pump units cascade system
(400 nominal kW – 160 l/min) with recycling line, it would be better
to foresee the installation of three ModvFresh, standard model so
placed:
the rst linked to ModvMaster, identied with number 1;
the second end the third, respectively linked to ModvSlaves,
number 2 and 3;
To nish the system the fourth pump unit, equipped with recycling
and linked to ModvSlave number 4.
To install the ball valves suitable to fit the servomotors you must remove
the connection on the feeding way of the supply water network to go on
to remove of the pipe union connection, as shown in the picture at side;
this operation also requires the elimination of the built in check valve.
As the logic of the system requires that almost one isolating valve is always
open, to prevent the emptying of the installation, we recommend to install,
before the VFS sensor, a check valve with a size t to the piping of the
common supply line of the pump units.
TAKE CARE!
Then, always with reference to the picture 1, do the connection to
the check valve and the VFS sensor on the supply watering line,
and place them at the bottom of the connecting derivations of each
pump unit.
Finally connect the pump units to the common lines; to select the
right size of the pipes t to the dimension of the installation, see the
chart at side.
FIELD OF UTILIZATION:
For a maximum nominal power of 500 kW and ow up to 200 l/min.
Nominal supply temperature of the storage tank: 60°C.
Nominal temperature of the water supply: 10°C.
Nominal temperature of HDW production: 45°C, adjustable from 30°C to 70°C.
Recycling line temperature adjustable from 10°C up to 40°C.
Recycling line pipings
(if present)
DN15
DN20
DN20
DN15
No. of ModvFresh
pump units, 100 kW
Installation
pipings [mm]
3 pcs
4 pcs
5 pcs
DN32 (Cu 35x1,5)
DN32 (Cu 35x1,5)
DN40 (Cu 42x1,5)
2 pcs DN25 (Cu 28x1,5)
Minimum pipings diameters

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 3 of 6 Rev.3 - 12/01/2017
(1)
Master
(2)
Slave
(4)
Slave
(3)
Slave
(5)
Slave
Electrical connection scheme
Picture 2: Electric scheme for the wiring of servomotors,
signal converter and VFS sensor.
The pump units are fully pre-wired. A Shuko plugs are
necessaries to connect them to the electric system.
Voltage: 230 VAC ± 10%. Frequency: 50÷60 Hz.
Maximum absorbed power for each pump unit: 200W.
DANGER
Collegamento elettrico
Do the electric wirings following carefully the scheme of picture 2, that concerns exclusively to the wiring of VFS sensor (A), of signal
converter (B) and of ModvMaster (1) and ModvSlave (respectively 2, 3, 4, 5) servomotors; moreover it is not necessary to do the
electric wirings inside each ModvFresh that, as already prewired at factory, must be only connected to the electric system
by means of the special plug.
The connection of the components of the Kascata system must be done as follows:
Connect the cables brown and green (power supply), white (signal) of the VFS sensor to the signal converter, respectively to the
clamps 12, 11 and 9;
Connect the signal converter to the power supply 230 VAC by means of the clamps number 13, 15, 17;
Make the the line to tanfer the ow informations between the converter and ModvMaster, by connecting respectively the clamps
number 21 and 22 of the rst one to the numbers 11 and 10 of the second one.
Supply power to all the servomotors of the system by means of the clamps number 1and 2 of each servomotor; supply an electric
power suitable to the working of components (100 VA - 50 W) and foresee the installation of a 2 A fuse to protect the system.
The feeder is not included in the equipment.
Make the bus line by wiring together all the servomotors: connect each ModvSlave servomotor (by means of the their clamps number
5) to the common line coming from the clamp 5of ModvMaster.
(A)
(B)
HDW system ModvFresh Kascata : delivered ow
Requested ow
[l/min]
40
80
Hot water selected
temperature [ °C]
50
50
Needed supply
temperature from the
storage tank [ °C]
70
70
Supplied power
[kW]
112
224
120
160
50
50
70
70
336
448
200 50 70 560
N° moduli
ModvFresh attivi
1
2
3
4
5
General informations concerning the working parameters of the system
(*) Feeder:
not included
in the supply
(*)

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 4 of 6 Rev.3 - 12/01/2017
Assembling of the servomotor on the ball valve
SLAVE Servomotor Ball valve
qDirection of rotation switch
Switching over: Change of direction of rotation
Used selection: Y2
wPush-button with green LED
O: No voltage supply or fault
On: In operation
Pressed button: Switches on angle of rotation adaption followed by standard
operation
ePush-button with yellow LED
O: Standard operation
On: Adaption or synchronising process active
Pressed button: No function
rPush-button for disengagement switch
Pressed button: Neutral drive, the motor stops, it is possible to work the controls
by hand on opening and closing
Released button: the drive is engaged, the synchronization starts, then the
working mode will be standard
MASTER servomotor
Controls and indicators
1
2
3
4
Coding at side:
1
2 3 4 5
Master
Slave
Y2
Y1
1
2

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 5 of 6 Rev.3 - 12/01/2017
q
w e
r t
The servomotor and the ball valve must be paired while both are in the open position.
Servomotor: put it into the manual mode and turn the knob in the
anticlockwise direction
Ball valve: check the
position of the control rod
12
Keeping pressed the button test the closing working (clockwise rotation) and the opening working (anticlockwise rotation). The full rotation
must be of 90°. Put in the open position and release the unlocking button.
Starting of the installation:
At the rst power supply the servomotors will do some opening and closing movements. During this step, that will last about
3 minutes, please do not interfere. When these operations are nished, only one servomotor must be in the open position.

ModvFresh Kascata: System to connect on cascade several hdw pump units
Page 6 of 6 Rev.3 - 12/01/2017
Recycling line
If the planning of the installation requires a recycling line, it
is possible to manage this function by installing, as the last
element of the cascade (to simplify the hydraulic connections),
a ModvFresh unit with recycling.
The starting time bands and the recycling line temperature
can be set directly on the built-in controller of the special unit.
Stop of the installation and routine function
Recycling line
in fact it allows a balanced load on all the units of the
system.
Once the user’s request stops, ModvMaster operates the
closing of all the isolating valves except the one of the priority
unit. It is important to say that it does not coincide necessarily
with the unit number 1(on which ModvMaster is placed),
because it is the routine function that determines, time by
time and according to the worked hours of every unit, which
one has to be kept in stand-by.
When a new user’s request is coming, the unit which, in that
particular moment, is considered primary will start up giving
again the ow and, if necessary, ModvMaster will operate
on the insulating valves of other units, bringing back the
system into the condition of scheme 1.
The importance of the routine function is fundamental,
Main working methods of the installation
ModvFresh Kascata has several working methods, according to the user’s requirements (for exemple a 3 units installation is sche-
matized).
Starting of the installation and selective activation of the units
water ow (in the scheme at side the requested ow is given by units 1and 2).
Therefore, in this working mode, every individual unit is activated or deactivated according to the variation of the request of hot water.
In the starting conguration, without any user’s requirement,
the rst ModvFresh (master) is in e󰀨ectiveness condition
(to be more precise it is in stand-by) because the isolating
valve managed by ModvMaster is usually open.
After the request of the rst user, the ModvFresh number
1 is activated and it starts to produce hot domestic sanitary
water.
Then, according to the increase of users and, consequently,
of the requested ow, the VFS sensor progressively registers
this increase and sends this input to ModvMaster that
controls the opening of the isolating valves placed on the
cold water inlet of every unit and, consequently, the starting
of the slave units necessary to allow the requested mixed Water supply VFS
Master Slave Slave