Installation - DGFLOW PRESFLO VARIO Betriebsanleitung

Installation

Preliminary checks
Take the PRESFLO out of
®
the packaging and check the
following:
- check for damage,
- check the RATINGS corre-
spond 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
Orientation
PRESFLO can be installed at
®
any angle depending on the
flow direction, as indicated in
the diagrams.
Position
PRESFLO can either be fitted
®
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 in-
stall a non-return valve on the
suction piping of the pump.
Configuration
2,4
0,8
range between 0.8 and 2.4 bar, incrementally, by turning the adjustment
knob clockwise to increase the Pm, and counterclockwise to reduce Pm.
Factory configuration:
PRESFLO is supplied with the following standard configuration:
- Running pressure: Pm = 1.5 bar
max 22 m
(70 ft)
Electrical
connections
The electrical
connections
should be made
as indicated
in the diagram
which can also
be found on the
Line
inside of the
circuit cover.
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.
Running pressure:
When the pressure in the system
drops below the Pm, PRESFLO starts
the pump.
The Pm must be greater at least 0.5
bar than the pressure generated by
the water column overlying PRESFLO.
The value of Pm can be varied in the
Attention
The pressure applied
by the water column above
PRESFLO must not exceed
®
that of the pump start-up
pressure (Pm). If, for exam-
ple, PRESFLO is installed at
®
a height 18 m (60 ft) below
that of the highest tap in
the system, the pressure
detected by PRESFLO will
®
be approximately 1,8 bar (25
psi). A change to Pm = 2.4
bar (35 psi) should, therefore,
be applied in order to guaran-
tee that the pump is started
when a tap is turned on.
Attention
The maximum pres-
sure produced by the pump
must be at least 1 bar (15
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.
Motor
Nut
Seal
Cable bushing
Hydraulic connections
the joint in two pieces allows
rapid connection to the system.
DO NOT apply sealant inside the
2-piece joint because it already
has an internal o-ring.
First start-up
Priming the pump
For instructions on how to
prime (fill) the pump, see the
pump manual.
Attention
PRESFLO is fitted with a
®
check valve: do not use the
PRESFLO 's outlet to fill 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 seconds 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 star-
ted for the first time, it
may have to be run for
longer in order to complete the
priming procedure.
Press the
STOP/RESTART
button
to restart the
pump and
complete the
priming procedure.
NOTE 1 - DRY RUN PROTECTION
= there is no flow 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). If PRESFLO detects
®
any pressure and/or flow, 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.