Safety Devices; Controls, Indicators And Connections; Inspections Prior To Starting; Starting/Stopping The Vacuum Cleaner - Nilfisk cfm VHT437EXP Manual De Instrucciones

VHT437EXP - VHT456EXP

Safety devices

1.
Regenerative blower
2. Pressure relief valve
3. Check valve (Clapet)
Do not tamper with the pressure relief valve setting.

Controls, indicators and connections

1. Container release handle
2.
Swivel caster with brake
3. Manual filter shaker knob
4. Vacuum gauge
5. Manual motor starter
6.
Band latch
7. Power supply cord
8. Push bar handle

Inspections prior to starting

1.
Inlet
Prior to starting, check that:
■ The filter is installed;
■ All latches are tightly locked;
■ The vacuum hose and tools have been correctly fitted
into the inlet (1).
■ The polyliner is installed, if applicable.
Do not use the device if the filter is faulty.
US
C404
Figure 5
WARNING!
Figure 6
Figure 7
WARNING!

Starting/stopping the vacuum cleaner

WARNING!
Lock the caster brakes (1) before starting the vacuum
cleaner.
IMPORTANT NOTICE
The control knob on the VHT437EXP and VHT456EXP
manual motor starter is designed so that it will not
engage or remain in the "I" (On) position unless the
machine is connected to a power source. Forcing the
control knob past the positions marked "I" or "O" will
damage the switch and cause it to fail.
Standard version
■ Turn the manual motor starter (2) to the "I" position
to start the vacuum cleaner. The motor will begin
turning before the switch is fully engaged. Continue
turning the dial until it clicks into the "I" position.
■ Turn the manual motor starter (2) to the "O" position
to turn the vacuum cleaner off.
Checking the rotation direction of the vacuum unit
motor
Check the vacuum cleaner operation by putting a hand over
the inlet.
If the vacuum cleaner does not vacuum any air, the rotation
direction is not correct; remove the plug from the socket and
exchange the connection of two phases inside the plug to
perform the correct phase sequence.

Vacuum cleaner operation

Vacuum gauge (2): green zone (3), red zone (1)
Check the flow rate:
■ 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/s);
■ if the pointer is in the red zone (1) it means that the
speed of the air in the vacuum hose is less than 3937
ft/min (20 m/s) and that the vacuum cleaner is not
operating in safety conditions. The filter must be shaken
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.
8
Figure 8
Figure 9
02/2014