DGFLOW PRESFLO MULTI User manual

10194507A _rev.03
PRESFLO
MULTI
CODE:
V / Hz:
I max: B
V00103101
~230 / 50-60
16 A
SN 1506003
RUEN FRIT ES
ELECTRONIC PUMP CONTROLLER
PRESFLO®is a device that
starts and stops the pump to
which it is tted, thus replacing
traditional pressure switch /
surge tank systems.
The pump is started when, as
a tap is turned on, the pressure
within the system drops below
the “start-up pressure” (Pm),
and is stopped when the ow
USER’S MANUAL
rate required is zero or less
than the “shut-off ow rate”
(Qa).
The electronics of PRESFLO®
protects the pump against
abnormal running conditions
such as dry running, repeated
start-ups due to leaks in the
system or overcurrents.
Technical specications
Losses
- Voltage: ~ 230 V / ~ 115 V - Frequency: 50-60 Hz
- Current: 12A, max 16A for 3 sec.
- Protection grade: IP 65
- Start-up pressure ( Pm ): 1÷5 Bar (15-70 psi)
- Shut-off ow rate ( Qa ): 2 litres/min (0,5 gpm)
- Connections: 1”M BSP / 1”M NPT
- Operating pressure: 8 bar (120 psi)
- Bursting pressure: 24 bar (350 psi)
- Weight: 1600 g
- Protection against: dry running
( automatic restart),
repeated start-ups,
overcurrents
Before installing, the product, check
that the RATINGS correspond with those
required.
Operating conditions
A. Compatible/non compa-
tible uids
PRESFLO®is suitable for use
with clean water and chemical-
ly non-aggressive liquids. If the
uid contains impurities, a lter
should be tted upstream.
B. Environmental conditions
PRESFLO®should not be used
where there is the risk of an
explosion. The temperature
of the location should range
between 0°C and 40°C, and
the humidity should not exceed
90%.
C. Power supply
Make sure that the variation
in the power supply is never
more or less than 10 % of the
RATING value.
Higher values may cause
damage to the electronic
components.
PRESFLO®can only be used
with single-phase pumps.
Working area
Flow rate
Pressure
Shut-off ow rate
Start-up pressure
Qa
Pm
Safety regulations
Before installing or using
PRESFLO®, read this manual
carefully and thoroughly.
The pump should be installed
and serviced by qualied per-
sonnel, responsible for making
the hydraulic and electrical
connections in compliance with
the relevant regulations.
DGFLOW®shall not be held lia-
ble for any damage relating to,
or resulting from, an improper
use of the product, or for any
damage relating to, or resulting
from, servicing or repairs carri-
ed out by unqualied personnel
and/or with non-OEM spare
parts.
The warranty, which is valid
for 24 months from the date
of purchase, will no longer be
applicable should the product
suffer damage as a conse-
quence of the use of non-OEM
spare parts, tampering or
improper use.
When starting the installation,
check the following:
- the power supply is switched
off.
- the power lines can withstand
the maximum current.
- the cable bushings and circuit
board cover have been properly
assembled and secured ( see
Electrical Connections ).
- the power supply is tted with
regulation earthing and safety
devices.
When servicing the product,
check the following:
- the system is not pressurised
(turn a tap on)
- the power supply is switched
off.
Emergency Stop
When in use, the pump can
be stopped in the event of an
emergency:
press
STOP/RESTART .
PRESFLO®is put OUT OF
SERVICE.
For no reason, disassemble
the water accumulator with the
system pressurized.
Cover
Water accumulator
To set the running pres-
sure (Pm) and the max.
motor current (I max.), see
Conguration paragraph.
Water accumulator pressure.
Should be inated to a value 0,5 bar lower than
the running pressure.
0 50 100 150 200 l/min
0 5 10 15
m H2O
Manufacturer’s
settings
Other selectable settings
RUEN FR DEIT ES
2l/min (0,5 gpm)
5,0 bar
(75 psi)
2,0 bar
(30 psi)
1,0 bar
(15 psi)

max = 48 m (160 ft)
Preliminary checks
Take the PRESFLO®out of
the packaging and check the
following:
- check for damage,
- check the RATINGS correspond
with those required,
- that the cable bushings and
screws are in place,
- that PRESFLO®’s inlets and
outlets are clean and free of any
packaging materials,
- that the check valve moves
smoothly.
Hydraulic connections
the joint in two pieces allows ra-
pid connection to the sy-
stem.
DO NOT apply se-
alant inside the 2-piece
joint because it already
has an internal o-ring.
Orientation
PRESFLO®can be installed at
any angle depending on the ow
direction, as indicated in the
diagrams.
Position
PRESFLO®can either be tted
directly to the pump outlet or
anywhere along the delivery
line. Never install taps between
the pump and PRESFLO®. Do
not install a non-return valve
between PRESFLO®and the taps,
meanwhile it is possible, although
not necessary, to install a non-
return valve on the suction piping
of the pump.
Installation
Attention
The pressure applied
by the water column above
PRESFLO®must not exceed that
of the pump start-up pressure
(Pm). If, for example, PRESFLO®
is installed at a height 20 metres
(65 ft) below that of the highest
tap in the system, the pressure
detected by PRESFLO®will be
approximately 2 bar (30 psi).
A model with Pm = 2.5 – 35 psi
bar should, therefore, be installed
in order to guarantee that the
pump is started when a tap is
turned on.
Attention
The maximum pressure
produced by the pump
must be at least 0.5 bar (7 psi)
higher than the start-up pressure
(Pm). If the pressure produced by
the pump is too low, PRESFLO®
will stop the pump and indicate a
‘dry running’ error message.
First start-up
Priming the pump
For instructions on how to
prime (ll) the pump, see the
pump manual.
Attention
PRESFLO®is tted with a
check valve: do not use the
PRESFLO®’s outlet to ll the
pump for priming.
Switching the pump on
The red (Power On) LED lights
up; PRESFLO®
instantly detects
that there is no
pressure within the system and
starts the pump
(the green ‘Pump
On’ LED lights up).
If, within 15 secon-
ds of starting up,
PRESFLO®does not detect the
correct priming of
the pump, it stops the pump
and indicates a ‘dry running’
error message.
Attention
When the pump is started for
the rst time, it may have to
be run for longer in order to
complete the priming
procedure.
Press the STOP/RE-
START button
to restart the
pump and
complete the
priming procedure.
NOTE 1 - DRY RUNNING = there is no ow and the pressure is lower
than that of the pump start-up pressure (Pm). It occurs when there is no
water. After 15 seconds PRESFLO®stops the pump and indicates an ERROR
message. PRESFLO®AUTOMATICALLY tries to resume NORMAL SERVICE
at intervals of increasing time (1, 15, 30, 60 minutes and successively once
every hour - 24 H for AU/NZ - ). If PRESFLO®detects any pressure and/or
ow, NORMAL SERVICE is resumed, otherwise, the pump is stopped again
until the next attempt is made. A MANUAL attempt to resume NORMAL
SERVICE can be made at any time.
NOTE 2 - FREQUENT START-UP = the repeated stopping and starting of
the pump at intervals of less than 1 minute from each other. This occurs
when the ow rate is less than 2 litres/min. This may cause damage to the
pump. In event of small leaks (dripping), PRESFLO®’s water accumulator
guarantees that the pump starts/stops at time intervals of over 1 minute
(less than 60 starts/hour) and that FREQUENT START-UP errors do not occur.
In the event of a major leak or extended use at excessively low ow rates
(less than 2 litres/min), the pump may be started/stopped as often as once
every few seconds, putting the pump at risk of damage. In this case, after
about 40 minutes, PRESFLO®stops the pump for the following 30 minutes
(in order to let it cool down) and indicates an ERROR message. If the time
interval between the starts-stops is more than 10 seconds (and therefore
poses less of a risk to the pump), PRESFLO®will allow the pump to be
used for more than 30 minutes. Once that enough time has passed to allow
the pump to cool down it is restarted AUTOMATICALLY. The pump may be
restarted MANUALLY any time.
NOTE 3 - OVERCURRENT = electric absorption of the pump (in Ampere)
exceeding the max. allowed (I max). By means of the conguration, it is
possible to set the max. current allowed (I max). During the start-up phase
of the pump PRESFLO®allows for a few seconds the current to exceed the
Imax value. If the absorptions remain above the set Imax value, PRESFLO®
stops the pump to avoid damaging the motor and signals an anomaly.
PRESFLO®will not automatically restart the pump. The pump may be
MANUALLY restarted at any moment. Should the problem persist an anomaly
will again be signalled. The manual restart can be repeated several times
since PRESFLO®does not limit the number of attempts.
NOTE 4 - SHUT-OFF FLOW RATE = Flow rate (Qa) of around 2 litres/min
(0,5 gpm) below which PRESFLO®stops the pump.
MotorLine
Nut
Seal
Cable bushing
Attention! The cable
bushings and circuit board
cover must be properly
assembled and secured
in order to guarantee IP
65 grade protection of the
electrical components.
Electrical con-
nections
The electrical
connections
should be made
as indicated in the
diagram which
can also be found
on the inside of
the circuit cover.

1
2a
2b
2c
3
4a
4b
4c
Operation
PRESFLO®is switched off.
Press briey or hold down =
nothing happens
Power is restored =
PRESFLO®resumes NORMAL
SERVICE and starts the pump (if
necessary).
No power supply
The system is pressurised.
All taps are turned off. There is no
demand for water. PRESFLO® detects an
assembly pressure higher than that of
the start-up pressure (Pm) and no ow.
Press briey = the pump is
started manually and runs for
a few seconds before stopping
again.
Hold down = lthe pump is put OUT OF
SERVICE.
For instructions on how to reactivate the
pump, see point 3.
A tap is turned on = as soon as the
pressure falls below the start-up pressu-
re (Pm), the pump is started.
NORMAL SERVICE: the pump is inactive.
The pump has been
stopped manually.
The pump will remain inactive until a new
command is given.
Press briey
= nothing happens.
Hold down
= the pump resumes NORMAL
SERVICE. See points 2a - 2b.
OUT OF SERVICE
PRESFLO®has
detected that the
pump is dry running and has therefore
stopped it TEMPORARILY.
Press briey = the pump is started
and manually and resumes
NORMAL SERVICE. See points
2a - 2b.
Hold down = the pump is put
OUT OF SERVICE. For instructions on
how to reactivate the pump, see point 3.
ERROR: stopped temporarily due to DRY RUNNING
The assembly requires water.
One or more taps are turned on.
PRESFLO®detects a ow; the assembly
pressure is normally higher than the
START-UP pressure, but it may also be
lower.
Press briey or hold down
= the pump is stopped and put
OUT OF SERVICE. For instruc-
tions on how to reactivate the
pump, see point 3.
The taps are turned off = Sif there is
no ow for a few seconds, the pump is
stopped.
NORMAL SERVICE: the pump is running PRESFLO®has
detected that the
pump starting-up too often and has there-
fore stopped it TEMPORARILY.
Press briey = the pump
is started and manually and
resumes NORMAL SERVICE. See
points 2a - 2b.
Hold down = the pump will
not restart and goes OUT OF ORDER.
The pump is put OUT OF SERVICE. For
instructions on how to reactivate the pump,
see point 3.
ERROR: temporary shut down due to FREQUENT START UP
ERROR: stop due to overload.
PRESFLO®has
detected a current
exceeding the max. allowed and has the
pump stopped.
Press briey = the pump is started
and manually and resumes
NORMAL SERVICE. See points
2a - 2b.
Hold down = the pump is put
OUT OF SERVICE. For instructions on
how to reactivate the pump, see point 3.
The system has just ceased to require
water. All taps are closed. The pump
is still in operation. The system is
pressurized.
PRESFLO® detects a system
pressure higher than the start-up
pressure (Pm) and no ow.
Press briey or hold down =
the pump is stopped and put in
STAND-BY. To reset see point 3.
If the absence of ow lasts for a
few seconds the pump is stopped.
NORMAL SERVICE: pump during shutdown
= Off = On = Flashing

Made in Italy by
DGFLOW srl Via Emilia, 5
46030 Bigarello (Mantova) Italy
tel. [phone]
fax. [phone]
info@dgow.it - www.dgow.it
Disposal
When disposing of any
PRESFLO®parts, adhere
to the relevant laws and
regulations in force in
the country in which the
equipment is being used.
Do not dispose of any
polluting parts in
the environment.
Conguration
Settable parameters:
- Running pressure.
When the pressure in the
system falls below the Pm,
PRESFLO®starts-up the pump.
The Pm should always be
higher by at least 0.2 – 0.3
bar of the pressure genera-
ted by the column of water
overlooking PRESFLO®.
The Pm value can be carried
in the eld between 1 bar and
5 bar.
- Maximum current
allowed.
PRESFLO®is tted with a cur-
rent sensor, which continually
detects the absorption of the
pump. If the current remains
above the set Imax value for
a signicant period of time,
PRESFLO®stops the pump to
protect it from damages (LOCK
condition for OVERCURRENT).
PRESFLO®nevertheless allows
the Imax to be exceeded for
short periods during the pump
start-up phase.
For correct functioning,
the Imax should be set at
a value higher by approx.
10 – 20% to the maximum
absorption of the pump
(normally indicated on the
rating plate of the motor).
If this rating value is not known,
it s better to leave the standard
Imax value (16A) to avoid that
the pump stops also in normal
absorption conditions.
The Imax value may be varied
in the eld between 4A and
16A.
Manufacturer’s setting:
PRESFLO®is supplied with the
following STANDARD CONFIGU-
RATION:
- Running pressure
Pm = 2 ( bar )
- Max. current allowed
I max = 16 ( A )
Statement of Compliance: we declare, under our own respon-
sibility, that the product in question is in compliance with the fol-
lowing European Directives and national implementation provisions
2006/95/CEE Low Voltage Directive
2002/95/CEE (RoHS)
2002/96/CEE - 2003/108/CEE (WEEE)
2004/108/CE Electromagnetic Compa-
tibility Directive (EMC)
EN 60730-2-6
EN 61000 6-3
Bigarello 27.05.15
DGFLOW S.r.l.
President
Stefano Concini
Conguration
The adjustment of the starting
pressure (Pm) and the ma-
ximum permissible current (I
max) is done by means of two
trimmers shown in FIG.
1. Remove the small screwdri-
ver and adjust the trimmer on
the desired limits, according to
the values shown on the plate
located under the screwdriver.
2. The start-up pressure can
be adjusted continuously from
1 to 5 bar (trimmer A)
3. The maximum permissible
current can be adjusted
continuously from 4 to 12 A
(trimmer B)
4. When you nish adjustment
close the cover
CODE:
V / Hz:
I max: B
V00103101
~230 / 50-60
16 A
SN 1506003
1
2
3
6
5
4
8 7
Exploded view of
spare parts
Attention: when orde-
ring spare parts, always
state the position n°
from the diagram below
and the product code
number found in the
pressure-ow regulator
technical data table.
Article
Version
Dimensions
= Off = Flashing
= On
1 - Circuit board cover
2 - Sensor kit
3 - Circuit board
4 - Valve kit
5 - Two-pieces joint with OR
6 - Cable bushings
7 - Accumulator adapter
8 - Water accumulator
Problems Signals Possible causes Solutions
PRESFLO®
will not turn on No power Check the electrical connections
The pump will
not start when
a tap is turned on
PRESFLO®model with an inadequate
start-up pressure (Pm) for the chosen
application.
Relocate PRESFLO®to another position
Install a model with a higher start-up pressure (Pm)
Faulty electrical connections or
pump out of service
Check the electrical connections and that the pump
is working
PRESFLO®“STAND-BY” Reset PRESFLO®(See Operation, point 3).
PRESFLO®in temporary shut down
due to “DRY RUNNING” due to lack
of water
Wait for the automatic restart or press START to
restart manually (See Operation, point 4a)
Maximum pump pressure is
insufcient
Replace the pump with one with more suitable
characteristics
Install a model with a lower start-up pressure (Pm)
PRESFLO®in temporary shut down
due to “FREQUENT START-UP”
Wait for the automatic restart or press START to
restart manually (See Operation, point 4b). Remove
any cause of leakage from system or install an
expansion tank
PRESFLO®stops due to “OVERCUR-
RENT”
Check if the setting of the maximum current (Imax)
is congruent with the data of the pumps’ rating
plate. If after manually restarting the pump after
correctly setting PRESFLO®, it again signals an
anomaly, check that the motor has no mechanical
or electrical problems.
The pump
delivers no or low
pressure
Filters or pipes may be partly blocked Check the water pipes
PRESFLO®’s valve will not open
completely
Check that the valve is not blocked by any foreign
objects and clean if necessary
The pump stops
and starts
repeatedly
Leaks within the system (less than
the shut-off ow rate Qa)
Check the hydraulic connections and repair any
leaks. If a leak cannot be repaired, install an
expansion tank
The pump will
not stop
The ow rate is higher than the
shut-off ow rate (Qa)
Make sure that all taps are turned off and that
there are no leaks within the system
PRESFLO®’s check valve will not
close or is damaged
Check that the valve is not blocked by any foreign
objects and clean if necessary