Engine System - Lpg; Functional Description; Wiring Diagram - Nilfisk-ALTO FLOORTEC R 870 Service Manual

Service Manual – Floortec R 870

Engine System - LPG

Functional Description

The engine system generates electric current for all
machine functions
The assembly consists of an internal combustion en-
gine and dynamotor, which are both connected to the
main crankshaft
The engine is a single-cylinder air-cooled LPG type
The engine start-up is made by the dynamotor to
which it is connected
The dynamotor acts as a starter, using the battery
only for the time necessary to start the engine At a
later stage, the running engine supplies the power to
the dynamotor to generate the current and to power
the electrical systems of the machine The surplus
current is used to charge the batteries
The engine speed is fixed, 2,750 rpm, to grant a con-
stant current to the electrical system
The LPG tank is fastened to the relevant holder in the
rear side of the machine and connected to the power
supply system with a hose and a double safety valve
When turning the ignition key, the safety solenoid
valve opens, the liquid gas passes through the filter
in the solenoid valve, thus reaching the pressure re-
ducer

Wiring Diagram

KEY
CIRCUIT FUSE (F4)
EMERGENCY
PUSH-BUTTON (SW0)
IGNITION
ENGINE
KEY (SW1)
SPARK PLUG (SPK)
ENGINE
OIL
ALERT
FRAME (FR)
LPG SAFETY
TIMER RELAY (KT1)
LPG SAFETY
SOLENOID VALVE (EV1)
The IMPCO T60-A-NN-2 two-phase pressure reducer
lowers the gas pressure, which then reaches the car-
burettor
The LPG system is protected against any overpres-
sure by a relief valve which activates at 27 atm (400
PSI) The fuel reserve warning light turns on when
the sensor in the power supply system detects a pres-
sure lower than 1 1 bar
For safety reasons, if the engine is not started (igni-
tion key to "II") within 2/3 seconds after turning on
the control panel (ignition key to "I"), the safety sole-
noid valve automatically closes the gas power supply
The engine is equipped with an oil level sensor (Oil
Alert), which purpose is to avoid damages caused by
an insufficient oil quantity in the oil pan. Before the
oil level goes below the safety limit, the system (Oil
Alert) automatically stops the engine If the engine
stops and do not restart, check the engine oil level
before doing any other troubleshooting procedure
MACHINE ON
RELAY (K4)
DIODE
(D3)
ENGINE START
ELECTROMAGNETIC
SWITCH (ES2)
Engine System - LPG
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P200140