Comet MTP MC 8 - Safety Devices; Safety Valve Requirements; Pressure Unloader;Regulation Valve; Thermal and Ampere Cut-Out Protection

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MOTOR PUMP IDENTIFICATION PLATE
WARNING
•Shouldtheidenticationplatedeteriorateduringuse,contacttheManufacturerora Skilled Technician to
haveitrestored.
eidenticationplate(12)showsthemotorpumpmodel,theserialnumber,theyearofmanufactureandthe
mainelectricalandmechanicalspecications(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
•e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.
isvalveissuitablysetbytheManufacturerandallowsregulatingtheoperatingpressureandpermitsthe
pumpeduidtoow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/odevices(suchastaps)isusually
called
control unit .
WARNING
•e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) ermal or ampere cut-out protection device.
is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
“checkIng and connectIng up to the power
supply” ,withspecialreferencetoanyextensionused;
• t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rsthavingitcheckedbya
Skilled Technician .