26
MOTOR PUMP IDENTIFICATION PLATE
WARNING
• Should the identification plate deteriorate during use, contact the Manufacturer or a
Skilled Technician
to
have it restored.
The identification plate (12) shows the motor pump model, the serial number, the year of manufacture and the
main electrical and mechanical specifications (max rotation speed, max pressure, weight, power supply voltage,
input, etc.). It is located on the base of the motor pump (all versions with combustion engine, MTP MC 20/20
and MTP MC 25 with electric motor), or on the power box (remaining motor pumps with electric motor).
SAFETY DEVICES
WARNING
• The machine in which the motor pump is integrated must always feature a safety valve, i.e., a max pressure
valve, suitably calibrated, which discharges excess pressure in case of a fault in the high-pressure circuit: in the
event of the safety valve tripping frequently, immediately stop using the machine in which the motor pump is
integrated and have it checked by a
Skilled Technician
.
a) Pressure unloader/regulation valve.
This valve is suitably set by the Manufacturer and allows regulating the operating pressure and permits the
pumped fluid to flow back towards the bypass duct, thus preventing the accumulation of dangerous pressures
when the delivery line is closed or when attempts are made to set pressure values above the maximum ones
allowed. A pressure unloader/regulation valve featuring pumped liquid on/off devices (such as taps) is usually
called
control unit
.
WARNING
• The pressure unloader/regulation valve is set either by the motor pump Manufacturer or by that of the machine
in which the motor pump is integrated.
Never try and adjust the pressure unloader/regulation valve to
alter the setting: only operate on this by means of the knob (3).
b) Thermal or ampere cut-out protection device.
This device stops motor pump operation in the event of overheating of the electric motor or excessive power
absorption respectively.
If one of these trips, proceed as follows,
keeping to the indications shown in the manual of the machine in
which the motor pump is integrated:
• stop the machine and remove the plug from the power socket;
• release any residual pressure in the high-pressure circuit;
• wait 10÷15 minutes for the motor pump to cool down;
• make sure the instructions have been followed in the paragraph
“c
heckIng
and
connectIng
up
to
the
power
supply
”
, with special reference to any extension used;
• fit the plug back in the socket and repeat the start procedure.
WARNING
• In case these safety devices trip frequently, do not use the motor pump (and therefore the machine in which it
is integrated) without first having it checked by a
Skilled Technician
.
