Nilfisk GWD 255 Parts Manual

Instructions/Spare Parts Manual

Nilfisk Model GWD255
Drum Top Vacuum

CAUTION: This Nilfisk vacuum cleaner is not to be used in explosion-hazardous areas, as

serious injury could result.

Under no circumstances may this vacuum cleaner be used safely for the collection of hazardous
or toxic materials unless equipped with a HEPA filter. Be sure to install the HEPA filter according
to Nilfisk’s written instructions.

Do not use this cleaner for the removal of hazardous substances unless you are licensed and/or
certified for this work by the all authorities having jurisdiction.

EMPTYING: If this vacuum cleaner is used to collect hazardous material, do not attempt to open
or empty its contents without personal protective clothing and respiratory protection. This
procedure must be completed in a contained environment. Contact with the cleaner, filters and
all other accessories used when picking-up hazardous materials must be handled according to
federal (EPA, OSHA), state and local regulations valid for the vacuumed substance.

ATTENTION EMPLOYER: Please ensure these instructions for Use are made available and
understood by your employees or any other persons who may use this equipment.

To list all toxic and hazardous materials would be beyond the scope of these instructions. It is
the Employer’s responsibility to identify, for Employee’s and others’ information, hazardous or
toxic materials which may be collected by this equipment. Such information must be
communicated to your Employees and other potential users of this equipment.

Nilfisk-Advance America Inc.
300 Technology Drive
Malvern, PA 19355
Tel: [phone]
Fax: [phone]
www.pa.nilfisk-advance.com

e-mail: [e-mail]

General Information

BEFORE CONNECTING THE MACHINE TO A POWER SUPPLY, check the electrical rating

plate located on the back of the motor head to see if the rated voltage agrees within 10% of the
voltage available.

DO NOT OIL the motor in this vacuum cleaner. It is permanently lubricated and sealed.

DO NOT OPERATE the vacuum cleaner without any filters. The Dry Filter, Wet/Dry Cartridge

Filter or HEPA filter should be installed to prevent dirt and dust from entering the motors.

This machine is equipped with a thermal breaker to protect the motor and other vital machine
parts from overheating. Should this breaker open, you will have to wait at least 5-10 minutes
before starting the machine again. You must reset the machine by switching the ON/OFF button.
While you are waiting, switch the machine off and unplug it. Check the hose and filters to be sure
that nothing is blocking the flow of air through the machine.

Service Information

UNPLUG THE MACHINE BEFORE PERFORMING ANY MAINTENANCE.

To obtain consistent performance over the life of your vacuum, read through these instructions
and keep them handy for future reference. If you require service, contact the dealer from whom
the vacuum was purchased, or the local authorized Service Station. Always refer to your Service
Station for complete service information. For prompt and complete service information, always
refer to the model, type and serial number indicated on the rating plate on the back of the motor
head.

IMPORTANT

The machine is equipped with a specially designed cord which if damaged, must be replaced by
a cord of the same type. This cord is available at authorized service centers and dealers and
must be installed by trained personnel.

Machine Setup

The GWD255 Drum Top Vacuum can be equipped for either dry or wet/dry collection. Follow the
instructions below before attempting to use your new machine to insure that you have assembled
the unit correctly. NOTE: For wet/dry collection, you must purchase the optional float chamber &
wet/dry cartridge filter assembly (5) shown below.

Dry Collection - Install the dry filter support (2) on the underside of the motor head (1). See next
page for installation instructions. Center the drum ring (4) onto a 30 or 55 gallon drum. Place the

dry filter (3) on top of the drum ring. Carefully place the motor head/filter support onto the drum
ring and clamp the entire assembly together using the latches.

The dry filter should be used when collecting dry powders or fine dust. This washable filter is easy
to clean and will dry much faster than the wet/dry cartridge filter. Small amounts of water can be
collected using the dry filter; however, it is best to allow the filter to dry completely before resuming
the collection of dry powder. An optional HEPA filter can be added in place of the filter support
(see HEPA filter installation).

Wet/Dry Collection - [Note: If the machine is configured for dry collection, remove the dry filter
support (2) and dry filter (3) before attempting to install the float chamber and wet/dry cartridge
filter assembly (5)]. Center the drum ring (4) onto a 30 or 55 gallon drum. Place the float chamber

and wet/dry cartridge filter assembly into the drum ring. Carefully place the motor head onto the
drum ring and clamp the entire assembly together using the latches.

The wet/dry cartridge filter is best used for collecting large amounts of water. The float ball inside
the float chamber will restrict the flow of air in the vacuum hose when the drum is approximately
75% full. This will stop the drum from overfilling and will prevent water from entering the motor
head. The vacuum’s motors are cooled by circulating outside air through the motor head and will
continue to run even after the flow of air in the hose has stopped. The wet/dry cartridge filter can
also serve as a dry filter; however, it is best to allow the filter to dry completely before switching to
dry collection. An optional HEPA filter can be added (see HEPA Filter installation).

Dry
Collection

1

2

5

3

4

Wet/Dry
Collection