5
PROTHO Technical Manual
Bores Group S.r.l.
container) to a dishwashing machine that controls it
in order to perform the necessary functions.The
device
must be positioned maintaining suitable distances
from the other components of the machine in order to
allow ease of maintenance. This expedient must also
prevent accidental leaks of the product from the
pump, following the breakage of the pumping pipe,
from damaging the surrounding components.
3.2 CONNECTING TO THE MAINS SUPPLY
The electrical safety of this device is only
obtained when it is installed in the dishwashing
machine observing the national safety laws in
force.
The dishwashing machine must be installed by skilled
and qualified personnel.
The Manufacturer cannot be considered
responsible for any damage caused by the
incompetence or carelessness of the installer.
Check that the electrical capacity of the system is
adequate for the maximum power of the metering
pump shown on the data plate.
The installer must also make sure that the cross-
section of the wires in the electrical system is suitable
for the absorbed power of the device.
The peristaltic metering pump for internal fitting
has no switch, therefore the supply voltage
causes the device to start immediately.
The installer must also find the connection points for
the feed to the peristaltic metering pump.
To feed a metering pump for detergent a parallel
connection to the rinsing solenoid or an equivalent
point must be made.
While for a metering pump for rinse aid a connection
to the washing pump of the dishwashing machine or
an equivalent point must be made.
If the detergent metering pump is supplied with
conductimetric regulation, a detergent sensor will
have to be installed and a 12.5 mm Ø hole drilled in
the dishwasher tank, below the water level. (If the
machine that needs the additive is already in service,
remember to empty the washing tank before carrying
out the above operation). After drilling the hole
position the sensor with the gasket for the hole and
tighten the relative nut from the outside of the tank.
Do not overtighten in order not to damage the various
components.
Now connect the wires that come out of the pump
container:
∗
one to earth (to the casing of the machine)
∗
the other to the fastener on the detergent sensor
previously installed.
We remind you to protect the metering pump feed
wires making sure that they do not get squashed or
damaged in any way.
Read the following directions carefully
Using the metering pump, as with any other electrical
device, entails complying with some fundamental
rules, such as:
∗
Do not touch it with damp or wet hands and feet
∗
Do not use it when you are bare-footed
∗
Do not use extension cables in rooms used as
kitchens, bathrooms or shower rooms
∗
Never pull the power cable to disconnect it from
the mains supply
∗
Do not let children or mentally incompetent people
use it.
Before carrying out any cleaning or maintenance
operations disconnect the machine that controls
the metering pump from the electrical supply and
remove the plug from the power socket.
If there is a fault on the device or it functions
poorly, turn it off following the procedure
described above and do not carry out any
improvised repairs or direct interventions.
Instead, contact professionally qualified
personnel only and demand the use of only
original spare parts. Failure to comply with what
is written above, besides invalidating all forms of
the warranty, can seriously jeopardise the correct
functioning of the device.
3.3 WATER CONNECTIONS
This peristaltic metering pump is only meant for
the dosage of additives in dishwashing
machines.
Skilled and professionally qualified personnel must
make the water connections following the
Manufacturer’s instructions and using the
components supplied in the kit specifically for
installation.
These connections are divided into two distinct
stages:
1) Suction circuit
2) Injection circuit
1) Connecting the suction circuit (fig. 2)
-
Connect the suction pipe to the pipe fitting (see
indicating arrow) and then reach the tank with
the product that has to be sucked up with the
other end.
-
Cut off any excess pipe and install the bottom
filter provided.
-
Then put the bottom filter into the tank.
2) Connecting the injection circuit
Depending on the product to be injected, connecting
the injection circuit is divided into:
a) Injecting the detergent
b) Injecting the rinse aid
