Safety Devices; Controls, Indicators And Connections; Inspections Prior To Starting; Starting/Stopping The Vacuum Cleaner - Nilfisk cfm VHW320 Manuel D'instructions

Safety devices

Figure 4
1. Regenerative blower
2. Pressure Relief Valve (PRV)
3.
Check valve (clapet)
WARNING!
Do not tamper with the PRV setting.

Controls, indicators and connections

Figure 5
1. Dust container release lever
2.
Caster brake
3. PullClean flap
4. Vacuum gauge
5. Manual motor starter
6.
Power supply cord
7. Handle
8. PullClean inlet collar

Inspections prior to starting

Figure 6
1. Inlet
Prior to starting, check that:
■ the filters are installed
■ all latches are tightly locked
■ the vacuum hose and tools have been correctly fitted into
the inlet (1)
■ the bag or safety dust container is installed, if applicable.
WARNING!
Do not use the device if the filter is faulty.

Starting/stopping the vacuum cleaner

Figure 7
WARNING!
Lock the caster brakes (1) before starting the vacuum
cleaner.
■ Turn the manual motor starter (2) to the "I" position to
start the vacuum cleaner.
■ Turn the manual motor starter to the "0" position to turn
the vacuum cleaner off.
10/2013
VHW320 - VHW321 - VHW420 - VHW421 - VHW440

Vacuum cleaner operation

Checking the rotation direction of the vacuum unit
motor
Check the vacuum cleaner operation by putting a hand on the
inlet.
For 3-phase models, if the vacuum cleaner does not vacuum
any air, the motor rotation direction is wrong; disconnect the
machine from the electrical mains and invert two of the three
phase wires inside the power plug.
Vacuum gauge (2): green zone (3), red zone (1)
Air speed check:
■ when the vacuum cleaner is operating, the pointer of
the vacuum gauge must remain in the green zone (3)
to ensure that the speed of the intake air does not drop
below the safety value of 3937 ft/min (20 m/sec);
■ if the pointer is in the red zone (1) it means that the
speed of the air in the vacuum hose is less than the
safety value and the filters must be cleaned or replaced.
■ during normal operation conditions, close the vacuum
hose. The pointer of the vacuum gauge must switch from
the green zone (3) to the red zone (1).
WARNING!
When the vacuum cleaner is operating, always check
that the vacuum gauge pointer remains in the green
zone (3).
Consult the "Troubleshooting" chapter if faults occur.
Primary cartridge filter cleaning
(PullClean models)
Depending on the vacuumed dust quantity and when the
pointer of the vacuum gauge switches from the green zone
(3, Fig. 8) to the red zone (1, Fig. 8), clean the main filters
by rotating the PullClean inlet collar (1 Fig. 9) to the "Closed"
position with the machine still running. Open the PullClean
flap (2 Fig. 9) several times for 1 or 2 seconds each time.
IMPORTANT: Return the PullClean inlet collar to the "Open"
position to continue normal operation.
9
Figure 8
Figure 8-9
US
C394