Description Of The High Pressure Cleaner; High Pressure Cleaner; Safety Circuits; Flame Control - Nilfisk-Advance N/G-4001A Operating Manual

The construction and function of
the high pressure cleaner
Your new high pressure cleaner is con-
structed as shown in the functional dia-
gram and photo No. 2 - 5. The machine
consists of a low pressure side and a high
pressure side with a built-in boiler system
and high pressure pump (2.16). From the
water inlet (2.9), the water is carried
through the float valve (2.23), into the
water box/pre-heater (2.7). At maximum
water level the float valve shuts off the
water supply. From the water box the
water is sucked into the three-cylinder
pump which is driven by the electric
motor (2.14). From the low pressure
chamber of the high pressure pump the
water is sucked through the suction
valves into the cylinders. Here the water is
pressurized and pumped through the
pressure valves into the high pressure
side through the flow switch (2.21) and
into the coil (2.6) where it is heated to the
required temperature by hot water or
steam. The operating temperature is set
and adjusted on the switch (2.28). The
water is pumped through the pressure
outlet (2.31) into the high pressure hose
(2.25), to the pistol (2.26), the lances
(2.27) and out through the nozzles (2.1)
and (2.2).
The pressure of the high pressure cleaner
is adjustable on the pressure regulation
handle (2.3) and can be read on the pres-
sure gauge (2.24). If the water pressure
exceeds the normal working pressure the
built-in safety valve (2.20) will open the
by-pass and thereby prevent damage to
the high pressure cleaner.
From the fuel tank (2.11) the fuel is
sucked through the fuel filter (2.13/3.1)
and on to the burner.
The high pressure cleaner can operate
with either cold water, hot water or steam.
For hot water or steam operation the inlet

Flame control

The flame control (2.8) supervises the oil
burner operation. Any flame failure condi-
tion will cause the oil burner to be
switched off after 10 seconds. The
machine will then continue operation as a
cold water cleaner.
Stop the high pressure cleaner by setting
the switch (2.28) in position "0". Remedy
the fault (see Fault finding) and restart the
machine.

Overheating protector

The overheating protector (2.4) stops the
high pressure cleaner if the temperature
of the boiler cap exceeds 60°C.

Overload protector

Thermal switches in the pump motor
DESCRIPTION
water is pre-heated on the low pressure
side in the pre-heater, while on the high
pressure side it is heated by means of the
burner (2.10) to the operating tempera-
ture in the boiler coil.
The high pressure cleaner is equipped
with a steam device (2.19). Through
recirculation it is possible to heat the
water to 130°C.
Detergent is added via the detergent
valve (2.17) from an external detergent
tank (2.15) which may be placed on the
holder for detergent tank. By means of
the detergent regulator (2.29) it is possi-
ble to dose up to 6% detergent.
The dose pump doses water softener
from the container (2.32) into the water
box (2.7).

SAFETY CIRCUITS

housing will protect the motor against
overheating. The voltage for all control
and safety functions is 24V. In case of
overload the high pressure cleaner will be
switched off.

Water level control

The water level control (2.22) disconnects
the burner at too low water level.
Stop the high pressure cleaner by turning
the switch (2.28) to pos. "0". Correct the
fault (see fault finding) and restart the
machine.
0-voltage release
The 0-voltage release is the safety mech-
anism against machine restart. Should the
power supply fail, then return to restart
2.1 High pressure jet
2.2 Low pressure jet
2.3 Pressure regulation handle
2.4 Overheating protector
2.5 Thermostat sensor
2.6 Heating coil
2.7 Water tank/pre-heater
2.8 Flame sensor
2.9 Water inlet/water filter
2.10 Burner
2.11 Fuel tank
2.12 Fuel level sensor
2.13/3.1Fuel filter
2.14 Electric motor
2.15 Detergent tank (external)
2.16 High pressure pump
2.17 Detergent valve
2.18 Bypass valve
2.19 Steam device
2.20 Safety valve
2.21 Flow-switch
2.22 Water level sensor
2.23 Float valve
2.24 Pressure gauge
2.25 High pressure hose
2.26 Pistol
2.27 Lances/Turbo Laser
2.28 Switch (start/stop)
2.29 Detergent regulator
2.30 Steam device regulator
2.31 Pressure outlet
2.32 Water softener tank
2.33 Oil glass
2.34 Filter for detergent
3.1 Fuel filter
3.2 Drain off fuel
4.1 Operation lamp
4.2 Lamp for phase sequense control
4.3 Lamp for restart
4.4 Lamp for water level control
4.5 Lamp for fuel level control
4.6 Lamp for flame control (acces
sory)
5.1 Breather glass oil - electric
motor
5.2 Oil hose - electric motor
the machine.
Turn the switch (2.28) to pos. "0", then
restart machine.

Phase sequence control

Your new high pressure cleaner is
equipped with a phase sequence control
which prevents the burner from starting if
the direction of rotation of the electric
motor is wrong.
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