Nastec VASCO User manual

VAriable Speed COntroller
Operating manual
VASCO
manVASCO_eng_05.docx

2
Index
1. VASCO Introduction........................................................................................................................................................... 3
2. Safety Instructions............................................................................................................................................................. 3
3. Technical Characteristics ................................................................................................................................................... 4
3.1 Weight and dimensions .......................................................................................................................................................... 4
4. Electric wiring.................................................................................................................................................................... 5
4.1 Protections............................................................................................................................................................................... 9
4.2 Electromagnetic compliance.................................................................................................................................................... 9
4.3 Installation with long motor cables ......................................................................................................................................... 9
5. VASCO installation............................................................................................................................................................10
5. VASCO Installation for constant pressure control ................................................................................................................... 12
5.1.1 Pressure tank .............................................................................................................................................................. 12
5.1.2 Pressure sensor........................................................................................................................................................... 12
6. VASCO Use and Programming ..........................................................................................................................................13
6.1 VASCO display ....................................................................................................................................................................... 13
6.2 Initial configuration............................................................................................................................................................... 13
6.3 Initial view ............................................................................................................................................................................. 15
6.4 Menu view............................................................................................................................................................................. 16
6.5 Installer parameters.............................................................................................................................................................. 16
6.6 Advanced parameters............................................................................................................................................................ 21
7. Protections and alarms.....................................................................................................................................................24
8. Minimum stop frequency at 0 delivery (f min Q=0) during constant pressure control. .....................................................26
9. Auxiliary pumps during constant pressure control ...........................................................................................................26
9.1 DOL pumps............................................................................................................................................................................ 27
9.2 COMBO function .................................................................................................................................................................... 28
10. Trouble-shooting chart ...................................................................................................................................................30
11. Technical Assistance .......................................................................................................................................................32

3
1. VASCO Introduction
VASCO is a variable frequency drive designed to control and protect pumping systems by varying the output frequency to the
pump.
VASCO can be applied to both new and existing pumping systems, and provides:
energy and cost savings
simplified installation and an overall lower pumping system cost
longer life of the pumping system and relevant components
improved reliability
VASCO, when connected to any pump, manages the system operation to maintain a certain constant physical quantity
(pressure, differential pressure, flow, temperature, etc.) regardless of the conditions of use. The pump is operated only when
needed thus avoiding unnecessary energy consumption.
VASCO at the same time is able to:
protect the motor from overload and dry running
implement soft start and soft stop to increase the system life and reduce current peaks
provide an indication of current consumption, voltage, and power
maintain a record of run time and display any errors and/or failures reported by the system
control up to two additional pumps at a constant speed (Direct On Line)
connect to other VASCO units for combined operation
Through the use of inductive filters (optional) VASCO eliminates dangerous surges that are induced in long cables, making
VASCO suitable for control of submersible pumps.
2. Safety Instructions
The manufacturer strongly suggests carefully reading this operation manual before using and installing its products
Any operation (installation, maintenance and repair) must be carried out by trained, skilled, and qualified personnel.
Failure to observe and follow the instructions in this manual may result in dangerous and potentially lethal electric shock.
Pay attention to all standard safety and accident prevention regulations
The device must be connected to main power supply via a switch to ensure the
complete disconnection from the network before any operation on the VASCO
itself (including visual inspection) and/or on the connected load.
Disconnect VASCO from the main power supply before commencing any work.
Do not remove, for any reason, the cover and the cable plate without having first
disconnected the device from the main power supply and having waited at least 5
minutes.
VASCO and pumping system must be grounded properly before operation.
For the entire period VASCO is powered, high voltage is present on the output
terminals of the inverter whether or not the pump is running.
Tightening all 4 screws on the cover with washers is recommended before
powering the device. Otherwise, there may be a failure to connect the cover to
ground, creating the risk of electric shock or even death.
Avoid any shock or significant impact during transport.
Check the VASCO immediately upon delivery and check for damage and/or missing parts. If either occurs, immediately notify
the supplier.
Damages due to transport, incorrect installation, or improper use of the device will null and void the warranty.
Tampering or disassembly of any component will automatically void the warranty.
The manufacturer cannot be held responsible for any damages to people and/or property due to improper use of its
products.

4
3. Technical Characteristics
Model
Vin +/- 15%
Max
Vout
Max line
current
Max
motor
current
Typical P2 motor
[V] AC
[V]
[A]
[A]
[KW]
[HP]
VASCO 209
1 x 230 VAC
1 x Vin
15
9
1.1
1.5
3 x Vin
7
1.5
2
VASCO 214
1 x 230 VAC
1 x Vin
20
9
1.1
1.5
3 x Vin
11
3
4
VASCO 406
3 x 380-460 VAC
3 x Vin
10
6
2,2
3
VASCO 409
3 x 380-460 VAC
3 x Vin
13,5
9
4
5,5
VASCO 414
3 x 380-460 VAC
3 x Vin
16
14
5,5
7,5
VASCO 418
3 x 380-460 VAC
3 x Vin
21
18
7,5
10
VASCO 425
3 x 380-460 VAC
3 x Vin
31
25
11
15
VASCO 430
3 x 380-460 VAC
3 x Vin
35
30
15
20
Power frequency: 50 - 60 Hz (+/- 2%)
Max. ambient temperature at nominal current: 40°C (104 °F)
Max. altitude at nominal current: 1000 m
Grade of protection: IP55 (NEMA 4) *
RS485 serial communication
PWM configurable: 2.5 ,4, 6, 8, 10 kHz
* auxiliary cooling fan of the VASCO, used in wall mounted applications, has a protection rating of IP20. If you require the version with IP55, please
contact the supplier.
VASCO is able to power the motor with a higher current for a short period of time according to the linear relation:
101% of the nominal current for 10min., 110% nominal current for 1 min.
3.1 Weight and dimensions
Model
Weight *
[Kg]
VASCO 209
4
VASCO 214
4,3
VASCO 406
4,4
VASCO 409
4,4
VASCO 414
7
VASCO 418
7
VASCO 425
7
VASCO 430
7,2
* Weight without auxiliary cooling fans and without packing.

5
4. Electric wiring
Power board VASCO 209,214
Power supply:
LINE: L1, L2, earth
It is recommended to use cable
lugs
Output:
3 ph motor:
earth ,U,V,W,
1 ph motor:
earth, U (running), V (common)
It is recommended to use cable lugs.
230 V AC auxiliary fans (wall
mounting kit)
FAN: F1, F2
Recommended line and motor cables stripping

6
Power board VASCO 406,409
Power supply:
LINE: GND , L1, L2, L3,
It is recommended to use cable
lugs.
Motor output:
MOTOR: U, V, W, GND
It is recommended to use cable
lugs.
12 V dc auxiliary fan (wall
mounting kit) :
0VE, + VE
WARNING: respect the polarity.
Cable stripping recommended for line input and output to the motor.

7
Power board VASCO 414,418,425,430
Power supply:
LINE: L1, L2, L3, GND
It is recommended to use cable
lugs.
Motor output:
MOTOR: U, V, W, GND
It is recommended to use cable
lugs.
12 V dc auxiliary fans (wall
mounting kit)
VENT: +, -
WARNING: respect the polarity.
Cable stripping recommended for line input and output to the motor.

8
Control board
Analog inputs (10 or 15 Vdc):
1. AN1: 4-20 mA: pressure sensor
2. AN2: 4-20 mA: auxiliary
pressure sensor
3. AN3: 4-20 mA / 0 - 10 Vdc
(settable by jumper C.C.): flow
sensor or temperature sensor
4. AN4: 4-20 mA / 0 - 10 Vdc
(settable by C.C.): trimmer for
frequency regulation
Digital outputs:
motor run signal:
NO1, COM1: closed contact with motor
running.
NC1,COM1: closed contact with motor
stopped.
alarm signal
NO2,COM2: opened contact without alarm.
NC2,COM2: closed contact without alarm.
DOL1 pump relay:
NO3,COM3: closed contact with DOL1
running.
NC3,COM3: opened contact with DOL1
running.
DOL2 pump relay:
NO4,COM4: closed contact with DOL2
running.
NC4,COM4: opened contact with DOL2
running.
Relays are no voltage contacts. Max.
voltage to the contacts is 250 V with max
current of 5 A.
RS485:
S+
S-
G
It is recommended
to respect the
polarity linking
more VASCOs in
series.
Digital inputs:
IN1
IN2
IN3
IN4
0V
We recommend using only no
voltage contacts.
Opening or closing the digital
contacts (depending on software
configuration set (see inst.
parameters) you can start or stop
the motor.

9
4.1 Protections
The protections required upstream each VASCOs depends on the type of installation, and local regulations. We recommend
to use overload protection with the characteristic curve of type C and type B circuit breaker, sensitive to both AC and DC
current.
4.2 Electromagnetic compliance
To ensure electromagnetic compatibility (EMC) of the system, it is necessary to apply the following measures:
Always connect the device to ground
Use shielded signal cables by placing the screen at one end.
Use motor cable as short as possible (<1 m / <3 ft). For longer lengths, it is recommended to use shielded cables
connecting the screen at both ends.
Separate signal, motor, and power supply cables.
Note: To enable the restoration of the display screen when there are electromagnetic interference, VASCO periodically
provides some fast "refresh" of the display.
4.3 Installation with long motor cables
With long motor cables it’s recommended to decrease the
commutation frequency from 10 kHz (default) to 2.5 kHz
(advanced parameters). This reduces the probability of
voltage spikes in the motor windings which may damage the
insulation.
For motor cable lengths up to 50 meters it’s recommended
to place between VASCO and motor a dv / dt reactance,
available on request.
For motor cable lengths greater than 50 meters it’s
recommended to place between VASCO and motor a
sinusoidal filter, available on request.

10
5. VASCO installation
VASCO can be installed directly on the fan cover of the motor or mounted on the wall.
Motor mounting kit
In this application VASCO is cooled by the motor fan. Motor kit (available upon request) allows a solid coupling of the two
units and it is composed of:
VASCO 209,214,406,409
VASCO 414,418,425,430
n.°4 rods
n.°4 M5 nuts
n.° 4 hooks
n.° 1 cooling ring
n.° 4 M5 screws.
n.° 4 clamps
n.° 4 clips to add if necessary
n.°1 centre pin
Use the cooling ring for best cooling of VASCO during
operation. Warning: when using the cooling ring, the
cooling air of the motor is slightly warmer than without
the VASCO; if the resulting motor temperature exceeds
the indicated maximum allowable value, remove the
cooling ring, leaving the VASCO to be cooled by itself.

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Wall mounting kit
In this application VASCO is cooled independently by its auxiliary cooling fan integrated in the radiator.
Wall-mounted kit is composed of:
VASCO 209,214,406,409
VASCO 414,418,425
n.° 1 auxiliary fan 230V AC (VASCO 209,214)
or 12 VDC (VASCO 406,409)
n.° 4 screws to fix cooling fan
n.° 1 protection grill
n.° 1 metal bracket in AISI 304
n.° 4 screws to fix VASCO to wall bracket
n.° 2 12 V DC fans.
n.° 1 fans cover.
n.° 2 fans cover fixing screws
n.° 2 wall fixing brackets
n.° 4 M5 screws for VASCO fixing to the brackets
n.°1 holes reference sheet
Make sure the manufacturer that the electric motor is suited for operation in the inverter
Make sure to properly attach the grid of the auxiliary cooling fan.
Make sure to remove the auxiliary cooling fan if VASCO is coupled to a motor. Failure to do so
creates a high risk of overheating the motor and VASCO unit.

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5. VASCO Installation for constant pressure control
VASCO controls the pump speed to maintain constant pressure at a set point independent of the water demand in the
system. A basic schematic is shown below:
5.1.1 Pressure tank
Installation of a pressure tank in the hydraulic system is recommended to compensate leakage of water in the system (or
during minimum water demand) and to avoid continuous start/stop cycling of the pump (check the appendix for more
information). Selecting the proper volume and pre-charge pressure of the tank is very important; smaller tank volumes will
not compensate adequately for minimum water usage or leakage, while larger volumes make it more difficult for VASCO to
control the pressure evenly.
Recommended tank volume is equal to the 10% of the maximum water flow of the system (expressed in volume unit/min)
Example: if the max water flow is 50 liters/min, the pressure tank should have a capacity of 5 liters
If the max water flow is 20 gpm, the pressure tank should have a capacity of 2 gallons
Pre-charge pressure of the pressure tank should be at least 80% than the set-pressure of the system.
Example: if the set-pressure of the system is 4 bar, the pre-charge pressure of the tank should be 3.2 bar
If the set-pressure of the system is 60 psi, the pre-charge pressure of the tank should be 48 psi
5.1.2 Pressure sensor
VASCO requires a pressure sensor with a linear output signal within the range 4 –20 mA. The pressure transducer can be
powered by any range of DC Voltage which includes the value 15 V dc. It is necessary to set the pressure sensor
characteristics in the initial configuration menu or in the installer menu (please check the relevant chapter on setting
parameters). Connect the sensor cable wires to the analog input terminals as follows:
0V: GND signal (if available)
AN1: signal 4-20 mA (-)
+15: 15 Vdc (+)
VASCO accepts the signal of a second pressure sensor in order to:
realize constant differential pressure (AN1 –AN2).
substitute first pressure sensor when it fails
0V: GND signal (if available)
AN2: signal 4-20 mA (-)
+15: 15 Vdc (+)
VASCO
1
2
3
5
4
1: pump
2: check valve
3: pressure tank
4: valve
5: valve
6: pressure sensor
6

13
6. VASCO Use and Programming
VASCO software is extremely simple to use, but allows a wide variety of parameters to be set for ideal system
calibration. Setting Parameters are organized in 2 levels:
1: Installer level
A password is required for this level; these parameters are adjustable by trained professionals
Default password: 001
From the menu a different password can be set up.
2. Advanced level
A second and different password is required; improper setting of these advanced parameters could compromise the
integrity and the life of VASCO and pump;
Default password 002
It is possible to set up a different password.
Installer and Advanced levels can be entered only with the correct password; otherwise, it is impossible to set up
and/or modify any parameters (they can be only displayed).
6.1 VASCO display
Screen is a back-lit LCD displaying 2 rows of 16 digits each. Alarms are indicated by an audible signal.
6.2 Initial configuration
When VASCO is switched on for the first time, the initial setting menu is displayed for the initial setting of parameters to
configure pump characteristics, pressure sensor range, and system characteristics.
If the initial setting procedure is not completed properly, it is impossible to run the pump. Initial setting procedure can be
repeated if necessary.
The initial setting procedure can be repeated (by using the 2rd level password) to reconfigure VASCO or if VASCO is installed
in a different system.
A brief description of parameters and their allowable ranges are listed below:
STOP motor
Menu exit
Alarms reset
START motor
ENTER
Scroll up
Scroll down

14
Parameter
Default
Description
XXXX
End user communication language
bar
Pressure unit
threephase
Type of motor connected (VASCO 209,214)
XX
Rated current of the motor per it’s nameplate indication increased by
10%. The voltage drop caused by the inverter leads to higher input
current than nominal. Make sure motor is capable of accepting
increased current.
50
Rated frequency of the motor per its nameplate.
Control mode: Constant pressure
16
Maximum pressure of pressure transducer;
Set the pressure value of the transducer when output signal is 20 mA
equivalent to the highest value of pressure range
(i.e. 0 –10 bars transducer range) 10 bars = 20 mA
If the transducer is not connected or connected improperly, the signal
SENS. PRESS OFF is activated when pressing ENTER.
10
Maximum pressure allowed in the system. If the pressure goes over
this value, an alarm occurs and the pump is stopped. Pump is
automatically restarted if the pressure goes below the maximum
value for a period of at least 5 seconds.
Press START/STOP to run a test at rated frequency
Warning: make sure to run the system without damaging pump and
system
--->
If, during the test, the motor runs in reverse, it is possible to change
the wiring sequence via software without physically changing wires at
the terminals.
3
The pressure value to be kept constant.
OFF
If ON is selected, after a lack of voltage, VASCO returns to its normal
status; if VASCO was powering the pump before the voltage drop, it
resumes powering the pump automatically.
Warning, review the advice in chapter 1
Once the Setting procedure is completed you will get this indication
on the display; setting parameters are recorded by VASCO; these
parameters can be set up individually in the INSTALLER Parameters
menu or ADVANCED Parameters menu.
INITIAL SETUP
COMPLETED
Autorestart
ON/OFF
Set pressure
p = XX.X [bar]
Rotation sense
---> / <---
Motor test
START/STOP
Max alarm press.
p = XX.X [bar]
Sensor test
Press ENT
F.s. press.sensor
20mA = XX.X [bar]
Rated motor freq
f = XXX [Hz]
Rated motor Amp.
I = XX.X [A]
Motor type
singlephase/threephase
Unit
bar/psi
Language
XXXXXX

15
6.3 Initial view
When first powering the VASCO, the display shows : release of display software (LCD = X.XX) and the release of inverter
software (INV = X.XX) as shown below:
The following End User messages are displayed by pushing the scroll buttons:
p_m is the pressure value read by the pressure transducer
By pressing ENTER the pressure set value is displayed. Keeping pressed ENTER button
more than 5 second, is possible to modify the set pressure on real time.
f value is the supply frequency to the motor; by pressing ENTER you can change the f
value manually (word “set” is displayed) , press ENTER again to exit parameter
setting (word “set” disappeared)
V is the voltage supplied to the motor. This value is displayed only if motor is OFF; if
motor is ON, A value equal to the absorbed motor current is displayed
cosphi index means the angle phi between the voltage and current absorbed by the
motor
P is the power in Watts supplied to the pump.
NORMAL status means no alarms.
If an alarm occurs, a message blinks on the display and an audible signal is activated.
Pressing ENTER accesses: VASCO lifetime, PUMP lifetime, alarm list.
PUMP lifetime is recorded while pump is powered.
To return to previous views, press ENTER.
First row gives the VASCO status:
Inv: ON XXX.X Hz VASCO is powered and is powering the motor showing its frequency.
Inv: ON Mot: OFF VASCO is powered but motor is not running (i.e. motor/pump was stopped due to minimum
frequency being reached)
Inv: OFF Mot: OFF VASCO is not powered
If COMBO function is activated, the VASCO address is placed close to indication “Inv”.
Menù
ENT to access
XXXXXXXXXXXXXXX
XXXXXXX h : XX m
Motor Life
xxxxx h : xx m
Inverter Life
xxxxx h : xx m
Inv: ON/OFF Mot: ON/OFF
STATUS: NORMAL
Inv: ON/OFF Mot: ON/OFF
P = XXXXX [W]
Inv: ON/OFF Mot: ON/OFF
cosphi = XXX
Inv: ON/OFF Mot: ON/OFF
V = X.XX [V] I= XX.X [A]
Inv: ON/OFF Mot: ON/OFF
f = XXX [Hz]
Inv: ON/OFF Mot: ON/OFF
p_m = XX.X [bar]
LCD = X.XX
INV = X.XX

16
6.4 Menu view
Pressing ENTER when you are in [MENU’ / ENT to access] in initial display, will display the following MENUs:
Installer password required to enter level 1 (default 001)
Advanced password required to enter level 2 (default 002)
Installer password required to enter level 1 (default 001)
It is possible to return to original set parameters.
Advanced password required to enter level 2 (default 002)
To exit the Menu level and return to initial display, press STOP button.
6.5 Installer parameters
Many of the Installer parameters are set during the Initial Configuration (chapter 6.2 Initial Configuration).
However, through the Installer Parameters menu, it is possible to change the set parameters or set others in order to perfect
the calibration of VASCO to the pumping system.
parameter
default
desciption
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Constant flow
Const. press.
Mode of control:
Constant pressure: VASCO changes the speed of pump to keep the
pressure constant, independent of water demand
Fixed frequency: VASCO feeds the pump a set frequency, so the speed of
motor is kept constant.
Constant pressure control with two values; the two values are selected by
opening or closing the digital input 2.
Fixed frequency control with two values to be selected by opening or
closing the digital input 2.
External speed: control motor frequency by using analogical input .
Constant temp.: VASCO changes the speed of pump to keep the
temperature constant. An analogical signal coming from a temperature
sensor must be connected.
Constant flow: VASCO changes the speed of pump to keep the flow
constant. An analogical signal coming from a flow sensor must be
connected.
Control mode
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Const. flow
MENU’
Change init.set.
MENU’
Retrive init.set
MENU’
Advanced. param.
MENU’
Install. param.

17
parameter
default
desciption
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Constant flow
bar
Pressure unit



°C
Temperature unit

16
Maximum pressure of pressure transducer;
Set the pressure value of the transducer when
output signal is 20 mA equivalent to the highest
value of pressure range (i.e. 0 –10 bars
transducer range) 10 bars = 20 mA





100
Full scale of the temperature sensor.
From the plate data of the sensor can read the
temperature at which the sensor provides output
20 mA. (or 10 V)

0
Full scale of the temperature sensor.
From the plate data of the sensor can read the
temperature at which the sensor provides output
4 mA. (or 0 V)

100
Full scale of the flow sensor.
From the plate data of the sensor can read the
flow at which the sensor provides output 20 mA.
(or 10 V)

20%
Zero point adjustment. (20 mA x 20% = 4 mA).







10
Maximum pressure allowed in the system. If the
pressure goes over this value, an alarm occurs
and the pump is stopped. Pump is automatically
restarted if the pressure goes below the
maximum value for a period of at least 5 seconds.







0
Minimum pressure allowed in the system. If the
pressure goes lower than the set value, an alarm
occurs and the pump is stopped. Pump is
automatically restarted if the pressure goes
higher than the minimum value for a period of at
least 5 seconds. This parameter is particularly
useful in the event a system pipe breaks. It is
suggested to set a value higher than 0.







0.65
If the pump goes into dry-running, the cosphi
reaches its lowest level. To set this value, contact
the pump manufacturer or test by closing the
suction and checking the value on the VASCO
display; a value can be set by assuming a dry
cosphi equivalent to 60% of the rated cosphi
specified by the manufacturer.







Dry run cosphi
cosphi = X.XX
Min alarm pres.
p = XX.X [bar]
Max alarm pres.
p = XX.X [bar]
Offset sensors
x = XX.X [%]
F.s. flow sensor
20mA = XXX.X [m3/h]
Min temp. sensor
4mA = - XXX.X [°C]
F.s. temp.sensor
20mA = XXX.X [°C]
F.s. press.sensor
20mA = XX.X [bar]
Unit
°C / °F
Unit
bar/psi

18
parameter
default
desciption
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Constant flow
3
The pressure value to be kept constant.


0
Pressure compensation at the maximum
frequency for each pump. Acting on the green
button you can reverse the sign.


3
The pressure value to be kept constant.

0
Pressure compensation at the maximum
frequency for each pump. Acting on the green
button you can reverse the sign.

5
Time to update p set for losses compensation.


To ensure proper operation of pressure control is recommended to place the sensor near the pump.
To compensate the pressure loss in the pipes (proportional to flow) it is possible to vary the pressure set in a linear relation
with respect to frequency. If Q = 0, Set pressure is granted while at the max output frequency will be granted the Set pressure
+ p loss compens.
It can perform the following test to verify the correct value of p loss compensation:
1. install a pressure gauge away from the pressure sensor
2. open completely the valve
3. check the pressure gauge
--> Set the value of p loss compens. equal to the difference of the values from the two gauges.
When using a group of pumps, the pressure compensation to be applied to each pump is equal to the total pressure
compensation (when all the pumps are running at full speed) divided by the number of pumps in the group.
Press. set update
t = XX [s]
p loss compens. 2
p = XX.X [bar]
Set pressure 2
p = XX.X [bar]
p loss compens.
p = XX.X [bar]
Set pressure
p = XX.X [bar]

19
parameter
default
desciption
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Constant flow
50
Set the frequency value (or the speed) to feed the
pump.


50
Set the frequency value (or the speed) to feed the
pump.

25
Temperature value to be maintained constant.

10
Flow value to be maintained constant.

40
Minimum frequency below which the pump must
stop.



5
Delay for which the pump will stop once the
minimum frequency is reached (f min Q=0)



20
Ramp time from freq min Q=0 to motor freq min.
If, during this time, the p checked goes below the
(p_set -delta start pres), VASCO powers the
motor again; otherwise, VASCO will stop the
pump following the min freq. of motor ramp.



0.3
This value represents the pressure drop below
the set pressure required to start the pump.


Delta start pres
p = XX.X [bar]
Ramp Q=0
t = XX [s]
Stop delay Q=0
t = XX [s]
Set f. min Q=0
fmin = XXX [Hz]
Flow set
Q = XXX.X [m3/h]
Temperature set
T = XXX.X [°C]
Operating freq. 2
f = XXX [Hz]
Operating freq.
f = XXX [Hz]

20
parameter
default
desciption
Constant press.
Fix speed
Const.press.2val
Fix speed 2 val.
External speed
Constant temp.
Constant flow
0.5
It's the increase of pressure respect to pressure
set which must be passed so that there is a forced
shutdown of the pump.


0.5
The common parameters than you should get the
temperature above the temperature set so that
the pump, arrested earlier, are restarted.

1
It's the temperature rise compared to
temperature set which must be passed so that
there is a forced shutdown of the pump.

0.5
This value represents the flow drop below the set
flow required to start the pump.

1
It's the increase of flow respect to flow set which
must be passed so that there is a forced
shutdown of the pump.

Kp and Ki parameters allow the dynamic control
of system by VASCO; set values (Ki=50, Kp=005)
are usually enough to get a valid dynamic control;
if the set pressure do not consent a valid control,
proceed as follows; increase or reduce Ki while
keeping Kp constant; if the problem persists,
increase Kp value and increase or reduce the Ki
value again till a good dynamic control is reached.




OFF
Function to activate (ON) the first auxiliary pump
DOL 1 (Direct On Line pump).



OFF
Function to activate (ON) the second auxiliary
pump DOL 2 (Direct On Line pump).



OFF
Function to allow alternating starting priority
between the DOL pumps in order to allow equal
use of them.



1
delay time with which the pumps DOL start after
the variable speed pump has reached the
maximum frequency and the pressure value has
fallen below set pressure –delta start pressure



OFF
Function to enable multiple VASCO’s to work in
parallel as described in the technical appendix
(see the relevant chapter). Up to 8 VASCO units
can be connected in parallel.
VASCO’s communication through RS 485 gates is
granted by a private protocol.




Direct
Direct: increasing misured pressure, VASCO
decreases motor frequency.
Inverse: increasing misured pressure, VASCO
increase motor frequency.




PI control
Direct/Reverse
COMBO
ON/OFF
Start delay AUX
t = XX [s]
Alternance
ON/OFF
Pump DOL 2
ON/OFF
Pump DOL 1
ON/OFF
Kp
XXX
Ki
XXX
Delta stop flow
Q = XXX.X [m3/h]
Delta start flow
Q = XXX.X [m3/h]
Delta stop temp.
T = XXX.X [°C]
Delta start temp.
T = XXX.X [°C]
Delta stop press
p = XX.X [bar]