BA 751 C - Industrial vacuum cleaner NILFISK - Free user manual and instructions

USER MANUAL BA 751 C NILFISK

CONSERVATION DU MANUEL

17/12/2009 16.34.06 ENGLISH USER MANUAL INTRODUCTION NOTE The numbers in brackets refer to the components shown in Machine Description chapter.

MANUAL PURPOSE AND CONTENTS

The purpose of this Manual is to provide the operator with all necessary information to use the machine properly, in a safe and autonomous way. It contains information about technical data, safety, operation, storage, maintenance, spare parts and disposal. Before performing any procedure on the machine, the operators and qualified technicians must read this Manual carefully. Contact Nilfisk in case of doubts regarding the interpretation of the instructions and for any further information. TARGET This Manual is intended for operators and technicians qualified to perform the machine maintenance. The operators must not perform procedures reserved for qualified technicians. Nilfisk will not be answerable for damages coming from the non-observance of this prohibition.

HOW TO KEEP THIS MANUAL

The User Manual must be kept near the machine, inside an adequate case, away from liquids and other substances that can cause damage to it.

DECLARATION OF CONFORMITY

The Declaration of Conformity, supplied with the machine, certifies the machine conformity with the law in force. NOTE Two copies of the original declaration of conformity are provided together with the machine documentation. IDENTIFICATION DATA The machine model and serial number are marked on the plate (34). The machine production year is written in the declaration of conformity and it is also indicated by the first two figures of the machine serial number. This information is useful when requiring machine spare parts. Use the following table to write down the machine identification data. MACHINE model .................................................................... MACHINE serial number ........................................................

OTHER REFERENCE MANUALS

Electronic Battery Charger Manual (if equipped), to be considered as integral part of this Manual Moreover, the following Manuals are available: Service Manual (that can be consulted at Nilfisk Service Centers) Spare Parts List (supplied with the machine)

SPARE PARTS AND MAINTENANCE

All necessary operating, maintenance and repair procedures must be performed by qualified personnel or by Nilfisk Service Centers. Only original spare parts and accessories must be used. Contact Nilfisk for service or to order spare parts and accessories, specifying the machine model and serial number.

CHANGES AND IMPROVEMENTS

Nilfisk constantly improves its products and reserves the right to make changes and improvements at its discretion without being obliged to apply such benefits to the machines that were previously sold. Any change and/or addition of accessory must be approved and performed by Nilfisk. OPERATION CAPABILITIES These scrubber-dryers are used to clean (scrubbing and drying) smooth and solid floors, in civil or industrial environment, under safe operation conditions by a qualified operator. The scrubber-dryers cannot be used for fitted carpet and carpet cleaning. CONVENTIONS Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in driving position with the hands on the handlebar (2).

9097293000(2)2009-12 A.indb 2 9097293000(2)2009-12 A BA 651 - BA 751 - BA 851 - BA 751 C 17/12/2009 16.34.06 USER MANUAL ENGLISH UNPACKING/DELIVERY To unpack the machine, carefully follow the instructions on the packing. Upon delivery carefully check that the machine and its packing have not been damaged during transportation. In case of visible damages, keep the packing and have it checked by the carrier that delivered it. Call the carrier immediately to fill in a damage claim. Check that the machine is equipped with the following features:

• Scrubber-dryer Spare Parts List

2. No. 1 connector for battery charger (for machines without on board battery charger)

3. No. 2 lamellar fuses

SAFETY The following symbols indicate potentially dangerous situations. Always read this information carefully and take all necessary precautions to safeguard people and property. The operator’s cooperation is essential in order to prevent injury. No accident prevention program is effective without the total cooperation of the person responsible for the machine operation. Most of the accidents that may occur in a factory, while working or moving around, are caused by failure to comply with the simplest rules for exercising prudence. A careful and prudent operator is the best guarantee against accidents and is essential for successful completion of any prevention program. SYMBOLS DANGER! It indicates a dangerous situation with risk of death for the operator. WARNING! It indicates a potential risk of injury for people or damage to objects. CAUTION! It indicates a caution or a remark related to important or useful functions. Pay careful attention to the paragraphs marked by this symbol. NOTE It indicates a remark related to important or useful functions. CONSULTATION It indicates the necessity to refer to the User Manual before performing any procedure. GENERAL INSTRUCTIONS Specific warnings and cautions to inform about potential damages to people and machine are shown below. DANGER! – Before performing any maintenance, repair, cleaning or replacement procedure disconnect the battery connector and remove the ignition key. – This machine must be used by properly trained operators only. Children or disabled people cannot use this machine. – Keep the battery away from sparks, flames and incandescent material. During the normal operation explosive gases are released. – Do not wear jewels when working near electrical components. – Do not work under the lifted machine without supporting it with safety stands. – Do not operate the machine near toxic, dangerous, flammable and/or explosive powders, liquids or vapours: This machine is not suitable for collecting dangerous powders. – Battery charging produces highly explosive hydrogen gas. Keep the tank assembly open during battery charging and perform this procedure in well-ventilated areas and away from naked flames. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 3 9097293000(2)2009-12 A

17/12/2009 16.34.07 ENGLISH USER MANUAL WARNING! – Carefully read all the instructions before performing any maintenance/repair procedure. – Before using the battery charger, ensure that frequency and voltage values, indicated on the machine serial number plate, match the electrical mains voltage. – Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp edges or corners. Do not run the machine on the battery charger cable. – Keep the battery charger cable away from heated surfaces. – Do not use the machine if the battery charger cable or plug is damaged. If the machine is not working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Center. – To reduce the risk of fire, electric shock, or injury, do not leave the machine unattended when it is plugged in. Before performing any maintenance procedure, disconnect the battery charger cable from the electrical mains. – Do not smoke while charging the batteries. – To avoid any unauthorised use of the machine, remove the ignition key (if equipped). – Do not leave the machine unattended without being sure that it cannot move independently. – Always protect the machine against the sun, rain and bad weather, both under operation and inactivity condition. Store the machine indoors, in a dry place: This machine must be used in dry conditions, it must not be used or kept outdoors in wet conditions. – Before using the machine, close all doors and/or covers. – Do not allow to be used as a toy. Close attention is necessary when used near children. – Use only as shown in this Manual. Use only Nilfisk’s recommended accessories. – Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the machine moving parts. – Do not use the machine on slopes with a gradient exceeding the specifications. – Do not use the machine in particularly dusty areas. – While using this machine, take care not to cause damage to people or objects. – Do not bump into shelves or scaffoldings, especially where there is a risk of falling objects. – Do not lean liquid containers on the machine, use the relevant can holder. – The machine working temperature must be between 0°C and +40°C. – The machine storage temperature must be between 0°C and +40°C. – The humidity must be between 30% and 95%. – When using floor cleaning detergents, follow the instructions on the labels of the detergent bottles. – To handle floor cleaning detergents, wear suitable gloves and protections. – Do not use the machine as a means of transport. – Do not allow the brushes to operate while the machine is stationary to avoid damaging the floor. – In case of fire, use a powder fire extinguisher, not a water one. – Do not tamper with the machine safety guards and follow the ordinary maintenance instructions scrupulously. – Do not allow any object to enter into the openings. Do not use the machine if the openings are clogged. Always keep the openings free from dust, hairs and any other foreign material which could reduce the air flow. – Do not remove or modify the plates affixed to the machine. – When the machine is to be pushed for service reasons (missing or discharged batteries, etc.), the speed must not exceed 4 km/h. – This machine cannot be used on roads or public streets. – Pay attention during machine transportation when temperature is below freezing point. The water in the recovery tank or in the hoses could freeze and seriously damage the machine. – Use brushes and pads supplied with the machine and those specified in the User Manual. Using other brushes or pads could reduce safety. – In case of machine malfunctions, ensure that these are not due to lack of maintenance. Otherwise, request assistance from the authorised personnel or from an authorised Service Center.

• does not work properly
• has water or foam leaks
• has been left outdoors exposed to bad weather conditions
• is wet or has been dropped into water turn it off immediately and contact the Nilfisk Service Center or a qualified technician. – If parts must be replaced, require ORIGINAL spare parts from an Authorised Dealer or Retailer. – To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter of this Manual, must be performed by the authorised personnel or by an authorised Service Center. – Carefully read all the instructions before performing any maintenance/repair procedure. – Do not wash the machine with direct or pressurised water jets, or with corrosive substances. – The machine must be disposed of properly, because of the presence of toxic-harmful materials (batteries, etc.), which are subject to standards that require disposal in special centres (see Scrapping chapter). MACHINE DESCRIPTION MACHINE STRUCTURE

Control panel Adjustable handlebar Drive paddle Speed adjuster Battery charger (optional) Battery charger cable (optional) Battery charger cable holder (optional) Solution/clean water filler neck Water removable filler hose (optional) Squeegee lifting/lowering lever Handlebar inclination adjusting knobs Battery connector (red). This connector also works as EMERGENCY push-button, to stop immediately all functions.

13. Rear steering wheel

14. Front driving wheels

15. Squeegee vacuum hose

16. Recovery water drain hose

17. Solution/clean water drain and level check hose

18. Deck with two brushes/pad-holders

19. Deck with two cylindrical brushes

20. Solution/clean water tank

22. Recovery tank cover

28. Deck fastening/releasing handwheel

Recovery tank cover (open) Tank cover gasket Cover movable retaining plate Cover fixed retaining plate (do not remove!) Serial number plate/technical data/conformity certification Recovery tank debris tray Vacuum grid with automatic shut-off float Drive system motor Brush/pad-holder motor Cylindrical brush motor Recovery tank (open) Tank lifting handle Tank safety cable Vacuum system motor cover Vacuum system motor sound-deadening filter Detergent tank (*) Detergent tank filler plug (*) Filler shut-off plug Deck lifting/lowering motor Water pump (*) Brush/pad-holder deck connector (red) Cylindrical brush deck connector (white) Batteries Battery caps Solution/clean water filter Solution/clean water tap Reference table for detergent proportioning (*) Battery connection diagram Pocket (optional) Detergent pump (*)

9097293000(2)2009-12 A.indb 6 9097293000(2)2009-12 A BA 651 - BA 751 - BA 851 - BA 751 C 17/12/2009 16.34.08 USER MANUAL ENGLISH CONTROL PANEL

71. Brush/pad/cylindrical brush-holder deck lifting/lowering

switch If held for 1 second, the extra pressure function turns on (only for BA 651 - BA 751 - BA 851)

72. Switch warning light:

• Brush/pad/cylindrical brush-holder deck lifting/lowering (green light)
• Extra pressure (red light) (only for BA 651 - BA 751 BA 851)

73. Vacuum system switch

74. Vacuum system switch warning light

81. Battery charge indicator

81a. Charged battery warning light (green) 81b. Semi-discharged battery warning light (yellow) 81c. Discharged battery warning light (red)

82. Washing water flow control switches

82a. Flow increase switch 82b. Flow decrease switch 82c. Washing water flow indicator

P100173B ACCESSORIES/OPTIONS In addition to the standard components, the machine can be equipped with the following accessories/options, according to the machine specific use:

2. Electronic battery charger

3. Brushes and cylindrical brushes of different materials

4. Pads of different materials

5. Deck with two 24”-brushes/pad-holders and 33”-squeegee

6. Polyurethane squeegee blades

7. EDS™ - ECO Dosage Solution

8. Front and rear wheels of different materials

10. Solution/clean water removable filler hose

17/12/2009 16.34.31 ENGLISH USER MANUAL TECHNICAL DATA General technical data BA 601(*) (2 brushes/padholders) Model Machine height BA 651 (2 brushes/padholders) BA 751 (2 brushes/padholders) BA 751 C (2 cylindrical brushes) 1,072 mm Solution/clean water tank capacity 85 litres Recovery tank capacity 85 litres EDS™ - ECO Dosage Solution detergent percentage setting Front wheel diameter 0,25% ÷ 3% 267 mm Front wheel specific pressure on the floor

Rear wheel specific pressure on the floor

Rear wheel diameter 100 mm Vacuum system motor power 420 W Drive system motor power 200 W Drive speed (variable) 0 to 5.6 km/h Gradeability 2% (1°) Sound pressure level at workstation (ISO 11201, ISO 4871) (LpA) 58 dB(A) ± 3 dB(A) Machine sound pressure level (ISO 3744, ISO 4871) (LwA) 62 dB(A) Vibration level at the operator’s arms (ISO 5349-1) < 2.5 m/s2 Standard batteries (4 x 6 V) 180 Ah@5h Battery compartment size (width x length x height) 375 x 355 x 615 mm Vacuum system circuit capacity

BA 851 (2 brushes/padholders) 1,448 mm/H2O Optional model

32 kg Brush/pad-holder pressure with extra-pressure function turned on

Optional model Technical data for machines with cylindrical brush deck BA 751 C (2 cylindrical brushes) Model Cleaning width 710 mm Cylindrical brush size (diameter x length) Deck right/left offset 145 x 690 mm 91/91 mm Cylindrical brush deck distance from the floor (when lifted) 60 mm Squeegee width 889 mm Machine maximum length Machine width without squeegee 1,472 mm 785 mm Weight without batteries and with empty tanks 167 kg Maximum weight with batteries (maximum capacity) and full tanks 468 kg Brush motor power 2 x 600 W Cylindrical brush speed 613 rpm Cylindrical brush pressure BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 9 35 kg 9097293000(2)2009-12 A

24 V batteries Battery connector Battery charger main connector Battery charger sub-connector Deck connector Battery charger (optional) Cylindrical brush deck secondary connector Function electronic board Drive system electronic board Brush motor electromagnetic switches Vacuum system relay Solenoid valve Deck fuse Vacuum system fuse Drive system fuse Signal circuit fuse Brush/pad-holder release fuse Pump fuse Actuator fuse Hour counter (optional) Ignition key Brush/pad-holder motors Vacuum system motor Drive system motor Water pump (optional)

9097293000(2)2009-12 A.indb 10 9097293000(2)2009-12 A BA 651 - BA 751 - BA 851 - BA 751 C 17/12/2009 16.35.04 USER MANUAL ENGLISH USE WARNING! On some points of the machine there are some adhesive plates indicating: – DANGER – WARNING – CAUTION – CONSULTATION While reading this Manual, the operator must pay particular attention to the symbols shown on the plates. Do not cover these plates for any reason and immediately replace them if damaged. BATTERY CHECK/SETTING ON A NEW MACHINE WARNING! The electric components of the machine can be seriously damaged if the batteries are either improperly installed or connected. The batteries must be installed by qualified personnel only. Set the function electronic board according to the type of batteries installed (WET or GEL). Check the batteries for damage before installation. Disconnect the battery connector and the battery charger plug. Handle the batteries with great care. Install the battery terminal protection caps supplied with the machine. The machine can be equipped with: one 24 V battery two 12 V batteries four 6 V batteries connected according to the diagram shown in Fig. 1. 24 V 12 V

12 V Figure 1 P100175 The machine can be supplied in one of the following modes: A) Batteries (WET or GEL) already installed and ready to be used

1. Check that the batteries are connected to the machine with the connector (12).

2. Insert the ignition key (80) and turn it to “I”.

If the green warning light (81a) turns on, the batteries are ready to be used. If the yellow or red warning light (81b or 81c) turns on, the batteries must be charged (see the procedure in Maintenance chapter). B) Batteries (WET) installed on the machine, but without electrolyte

1. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16).

2. Grasp the handle (41) and carefully lift the tank (40).

3. Remove the caps (53) of the batteries (52).

WARNING! Pay attention when using sulphuric acid, as it is corrosive. If it comes in contact with skin or eyes, rinse thoroughly with water and consult a physician. Batteries have to be filled in a well-ventilated area. Wear protective gloves.

4. Fill up the battery cells with sulphuric acid for batteries (density 1.27 to 1.29 kg at 25°C) as shown in the Battery Manual. The correct quantity of sulphuric acid is shown in the Battery Manual.

5. To avoid damaging the floor, dry with a cloth both acid and water on the top of the batteries after charging.

6. Let the batteries rest and fill in with sulphuric acid in accordance with the instructions shown in the Battery Manual.

7. Charge the batteries (see the procedure in Maintenance chapter).

1. Buy appropriate batteries (see the Technical Data paragraph).

2. For battery choice and installation, apply to qualified battery Retailers.

3. Set the machine according to the type of batteries installed (WET or GEL) as shown in the relevant paragraph.

BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 11 9097293000(2)2009-12 A

Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Grasp the handle (41) and carefully lift the tank (40). Install the batteries. Battery type setting Set the electronic board of the machine according to the type of batteries installed (WET or GEL) as shown below: 4. Turn the ignition key (80) to “I” and, in the very first seconds of machine operation, detect the current setting by counting the number of flashes of the warning lights (81a), (81b), (81c), as shown in the following table: SETTING

4 flashes of the red warning light (81c) WET

2 flashes of the red warning light (81c) WET

REDUCED (see note) If the setting is to be changed, perform the following procedure. Turn off the machine by turning the ignition key (80) to “0”. Press and hold the switches (71) and (73) at the same time, then turn the ignition key (80) to “I”. Release the switches (71) and (73) at least 8 seconds after starting the machine. Within 3 seconds, shortly press the switch (73) to go to the next setting (1 to 6 in cyclic sequence). NOTE When performing steps 8 and 9, the settings shown in the table are shown also on the flow indicator (82c) (1st LED on the left ON = setting 1, 2nd LED on the left ON = setting 2, etc.) NOTE When using batteries with a capacity lower than 160Ah@5h (in case of doubt, refer to the battery documents), to avoid battery overheating during charging procedure, use the REDUCED charging current with setting 4, 5 or 6 shown in the table, according to the type of batteries installed. Battery charging

10. Charge the batteries (see the procedure in Maintenance chapter).

P100172B WARNING! When the machine is to be started by turning the ignition key (80) to “I”, make sure that, between the deck (18 or 19) and the above tank assembly, there is no foreign material which may prevent the deck from lifting. This procedure must be performed because if the machine has been turned off without lifting the deck, the deck would lift automatically at next machine start-up. WARNING! Before turning on the deck lifting/lowering switch (71), always check that, between the deck (18 or 19) and the above tank assembly, there is no foreign material which may prevent the deck from lifting. Brush/pad-holder deck or cylindrical brush deck installation/removal The machine can be equipped with either the brush/pad-holder deck (18) or the cylindrical brush deck (19). For deck installation/removal see the procedure in Maintenance chapter. NOTE When the deck is installed/removed, it may be necessary to change the squeegee too, because they must have the same width. For correct matching of deck and squeegee, see the Squeegee Installation paragraph. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 13 9097293000(2)2009-12 A

According to the kind of cleaning to be performed, the machine can be equipped either with brushes (A, Fig. 2) or pad-holders (B) with pads (C) together with the appropriate deck. Insert the ignition key (80) and turn it to “I”. Turn the speed adjuster (84) to idle by turning it counter-clockwise. Place the brushes (A) or the pad-holders (B) under the deck (18). Lower the deck on the brushes/pad-holders by pressing the switch (71). To engage the brushes/pad-holders, press the drive paddle (83) and then release it. If necessary, repeat the procedure until the brushes/pad-holders are engaged. WARNING! Turn the speed adjuster (84) counter-clockwise to run the machine at idle speed. Do not press the paddle (83) completely, otherwise the machine will start moving. A slight pressure on the paddle is enough to engage the brush/pad-holder and to turn on the relevant motor.

To remove the brushes/pad-holders, the deck must be lifted by pressing the switch (71), then press the switch (75) and wait for the brush/pad-holder to fall on the floor. Turn the ignition key (80) to “0”.

Optional model Brush/pad application guide Models MIDLITE GRIT 180 MIDGRIT 240 PROLENE PROLITE UNION MIX General cleaning: Concrete Terrazzo floor Ceramic tiles/quarrystones Marble Vinyl tiles Rubber tiles Polishing: Rubber tiles Marble Vinyl tiles

Turn the ignition key (80) to “I”. Lift the cylindrical brush deck by pressing the switch (71). Turn the ignition key (80) to “0”. Remove the handwheels (A, Fig. 3) and the lids (B) by pushing them downwards and pressing on the handwheels. Install the cylindrical brushes (C). The cylindrical brushes can be installed on either sides. Install the lids (B) and fasten them with the handwheels (A). To remove the cylindrical brushes, perform steps 1 to 6 in the reverse order.

Install the squeegee (25) and fasten it with the handwheels (26), then connect the vacuum hose (15) to the squeegee. Adjust the squeegee with the handwheel (27) so that the rear blade - in all its length - touches the floor. Guide to match squeegees and brush/pad-holder decks Model Deck Squeegee model Deck with two brushes (18), brush diameter 305 mm Aluminium width 838 mm BA 651 Deck with two brushes (18), brush diameter 330 mm Aluminium width 889 mm BA 751 Deck with two brushes (18), brush diameter 355 mm Aluminium width 889 mm BA 851 Deck with two brushes (18), brush diameter 430 mm Aluminium width 1,067 mm BA 751 C Deck with two cylindrical brushes (19), brush length 690 mm Aluminium width 889 mm BA 601

Remove the plug (47) to reach the filler (8). (For machines without EDS™ - ECO Dosage Solution) Fill the tank (20) with a solution suitable for the work to be performed. Do not fill the solution tank completely, leave a few centimetres from the edge. Use the removable hose (17) as reference. Always follow the dilution instructions on the label of the chemical product used to prepare the solution. The solution temperature must not exceed 40°C. WARNING! Use only low-foam and non-flammable detergents, intended for automatic scrubber applications. (For machines with EDS™ - ECO Dosage Solution) Fill the tank (20) with clean water by using the filler neck (8). Do not fill the clean water tank completely, leave a few centimetres from the edge. Use the removable hose (17) as reference. The water temperature must not exceed 40°C. Detergent tank filling (for machines with EDS™ - ECO Dosage Solution)

Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Grasp the handle (41) and carefully lift the tank (40). Open the plug (46). Fill the tank (45) with a detergent suitable for the work to be performed (highly concentrated detergent). Do not fill the detergent tank completely, leave a few inches from the edge. CAUTION! Use only low-foam and non-flammable detergents, intended for automatic scrubber applications. NOTE In case of new system, system emptied for cleaning, etc., wait for the hoses to fill up completely before turning on the EDS™ - ECO Dosage Solution. In order to fill the system quickly it may be useful to drain the EDS™ - ECO Dosage Solution once or several times (see the procedure in Maintenance chapter).

MACHINE START AND STOP

Prepare the machine as shown in the previous paragraph. Insert the ignition key (80) and turn it to “I”. Check that the green warning light (81a) turns on (charged batteries). If the yellow or red warning light (81b or 81c) turns on, turn the ignition switch back to “0” and charge the batteries (see the procedure in Maintenance chapter). Drive the machine to the working place:

• By starting it with the hands on the handlebar (2) and pushing the paddle (83) forward to move forward, and backwards to move in reverse. The maximum forward speed can be adjusted with the adjuster (84). Lower the squeegee (25) with the lever (10). Lower the brush/pad-holder deck by pressing the switch (71). Press the vacuum system switch (73). Press the washing water flow control switches (82) as necessary, depending on the type of cleaning to be performed. Start cleaning, by moving the machine as shown in step 3. If necessary, adjust the maximum speed with the adjuster (84). Stopping the machine

Stop the machine by releasing the paddle (83). Turn off the vacuum system by pressing the switch (73). Lift the brush/pad-holder deck by pressing the switch (71). Lift the squeegee (25) with the lever (10). Make sure that the machine cannot move independently. MACHINE OPERATION (SCRUBBING/DRYING)

Start the machine as shown in the previous paragraph. If necessary, press the washing water flow control switches (82) as necessary, depending on the type of cleaning to be performed. If necessary, stop the machine and turn the squeegee adjusting handwheel (27) so that the rear blade (25) - in all its length touches the floor. CAUTION! To avoid any damage to the floor surface, turn off the brushes/pad-holders when the machine stops in one place, especially when the extra pressure function (optional) is on. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 17 9097293000(2)2009-12 A

17/12/2009 16.35.20 USER MANUAL ENGLISH Detergent flow adjustment (For machines with EDS™ - ECO Dosage Solution) To check the actual setting of the detergent percentage to be added to the washing water, perform the following procedure:

1. Press and turn off the detergent switch (A, Fig. 4) [the warning light (B) must be off].

2. Press the detergent switch (A). 3 seconds after pressing the switch, the indicator (C) turns on, thus indicating the percentage, as shown in the figure. To change the actual setting of the detergent percentage to be added to the washing water, perform the following procedure:

3. Press and turn off the detergent switch (A, Fig. 4) [the warning light (B) must be off].

4. Press and hold the detergent switch (A) until the warning light (B) flashes (after about 5 seconds).

5. Release and press again the detergent switch (A), to go to the next percentage shown by the indicator (C); repeat the

procedure until the desired setting is reached. 6. Wait for the warning light (B) to turn off and for the indicator (C) to show the washing water flow: the new percentage value is now set. NOTE Detergent percentage setting is stored into memory, even if the machine is turned off.

9097293000(2)2009-12 A.indb 18 9097293000(2)2009-12 A BA 651 - BA 751 - BA 851 - BA 751 C 17/12/2009 16.35.22 USER MANUAL ENGLISH Working with brush/pad-holder extra pressure function turned on (only for BA 651 - BA 751 - BA 851) If the floor proves to be particularly difficult to clean, it is possible to turn on the brush/pad-holder extra pressure function, according to the following procedure:

1. Press the switch (71) to lower the brush/pad-holder deck as shown in Starting The Machine paragraph.

2. Press and hold the switch (71) for more than 1 second. The extra pressure function activation is shown by the warning light (72) which turns from green to red. To return to normal pressure, press and hold the switch (71) for more than 1 second. To lift the brush/pad-holder deck without returning to the normal pressure, press the switch (71) and release it immediately. CAUTION! In case of brush/pad-holder motor overload, due to foreign bodies which prevent them from turning, or to excessively aggressive floors/brushes, the safety system stops the brushes/pad-holders after about one minute of continuous overload. The overload is shown by the three warning lights (81a, 81b, 81c) flashing simultaneously. If the overload takes place when the extra pressure function is on, the system automatically reduces the pressure on the brushes/pad-holders, thus turning the extra pressure function off. If the overload persists, the brushes/pad-holders stop. To start scrubbing again after a brush/pad-holder stop due to overload, stop the machine by turning the ignition key (80) to “0”. Turn on the machine by turning the ignition key (80) to “I”. Battery discharge during operation Until the green warning light (81a) stays on, the batteries allow the machine to work normally. When the green warning light (81a) turns off, and the yellow warning light (81b) turns on, it is advisable to charge the batteries, because the residual autonomy will last for a few minutes (depending on battery characteristics and work to be performed). When the red warning light (81c) turns on, the autonomy is over. After a few seconds the brushes/pad-holders automatically stop; only vacuum and drive systems still operate, just to dry the wet floor and move the machine to the appointed charging area. CAUTION! Do not use the machine with discharged batteries, to avoid damaging the batteries and reducing the battery life. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 19 9097293000(2)2009-12 A

P100172C An automatic float shut-off system (36) turns off the vacuum system when the recovery tank (21) is full. The vacuum system deactivation is signalled by a sudden increase in the vacuum system motor noise frequency, and the floor is not dried. CAUTION! If the vacuum system turns off accidentally (for example, when the float is activated because of a sudden machine movement), to resume the operation: turn off the vacuum system by pressing the switch (73), then open the cover (22) and check that the float inside the grid (36) has gone down to the water level. Then close the cover (22) and turn on the vacuum system by pressing the switch (73). When the recovery tank (21) is full, empty it according to the following procedure. Recovery tank emptying

Lift the brush/pad-holder deck by pressing the switch (71). Lift the squeegee (25) with the lever (10). Drive the machine to the appointed disposal area. Turn off the machine by turning the ignition key (80) to “0”. Empty the recovery tank with the hose (16). Then, rinse the tank with clean water. Solution/clean water tank emptying

Perform steps 1 to 4. Empty the solution tank with the hose (17). Then, rinse the tank with clean water. Cylindrical brush debris container emptying (only for cylindrical brush deck)

Turn the ignition key (80) to “I”. Lower the cylindrical brush deck by pressing the switch (71). Turn off the machine by turning the ignition key (80) to “0”. Lower the cylindrical brush deck and remove the debris container (D, Fig. 3) by pulling it on one side with the handle (E). Empty and wash the debris container (D), and then install it by engaging it on the fasteners.

AFTER USING THE MACHINE

After working, before leaving the machine:

1. Remove the brushes/pad-holders and the cylindrical brushes as shown in the relevant paragraph.

2. Empty the tanks (20 and 21) according to the procedure shown in the relevant paragraphs.

3. Perform the daily maintenance procedures (see the Maintenance chapter).

4. Store the machine in a clean and dry place, with the brushes/pad-holders and the squeegee lifted or removed.

MACHINE LONG INACTIVITY

If the machine is not going to be used for more than 30 days, proceed as follows:

1. Perform the procedures shown in After using the machine paragraph.

2. Disconnect the battery connector (12).

After the first 8 hours, check the machine fastening and connecting parts for proper tightening and check the visible parts for integrity and leakage. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 21 9097293000(2)2009-12 A

17/12/2009 16.35.51 ENGLISH USER MANUAL MAINTENANCE The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance. The following table provides the scheduled maintenance. The intervals shown may vary according to particular working conditions, which are to be defined by the person in charge of the maintenance. WARNING! The procedures must be performed with the machine off and the battery disconnected. Moreover, read carefully the instructions in the Safety chapter before performing any maintenance procedure. All scheduled or extraordinary maintenance procedures must be performed by qualified personnel, or by an authorised Service Center. This Manual describes only the easiest and most common maintenance procedures. For other maintenance procedures shown in the Scheduled Maintenance Table, refer to the Service Manual that can be consulted at any Service Center.

SCHEDULED MAINTENANCE TABLE

Daily, after using the machine Procedure Weekly Every six months Yearly Battery charging Squeegee cleaning Brush/pad cleaning Recovery tank and debris tray cleaning, and cover gasket check EDS™ - ECO Dosage Solution draining and cleaning (optional) Squeegee blade check and replacement Solution filter cleaning Vacuum system motor filter cleaning Battery (WET) fluid level check Screw and nut tightening check (1) Check and adjustment of driving belts between motors and cylindrical brushes (BA 751 C) (2) Brush/pad-holder motor carbon brush check or replacement (2) Vacuum system motor carbon brush check or replacement (2) Drive system motor carbon brush check or replacement (2) (1) And after the first 8 working hours. (2) This maintenance procedure must be performed by an authorised Nilfisk Service Center.

MACHINE WORKING HOUR CHECK

(Only if the machine is equipped with hour counter)

1. Turn the ignition key (80) to “I”.

2. Press the switch (73) and read on the hour counter (79) the total number of working hours (scrubbing/drying) performed by the machine.

3. Press the switch (73) again.

4. Turn the ignition key (80) to “0”.

9097293000(2)2009-12 A.indb 22 9097293000(2)2009-12 A BA 651 - BA 751 - BA 851 - BA 751 C 17/12/2009 16.35.51 USER MANUAL ENGLISH BATTERY CHARGING NOTE Charge the batteries when the yellow or red warning light (81b or 81c) turns on, or at the end of every working cycle. CAUTION! Keeping the batteries charged make their life last longer. CAUTION! When the batteries are discharged, charge them as soon as possible, as that condition makes their life shorter. Check for battery charge at least once a week. WARNING! WET battery charging produces highly explosive hydrogen gas. Charge the batteries in well-ventilated areas and away from naked flames. Do not smoke while charging the batteries. While charging the battery, always keep the tank assembly open. WARNING! Pay careful attention when charging the batteries as there may be battery fluid leakages. The battery fluid is corrosive. If it comes in contact with skin or eyes, rinse thoroughly with water and consult a physician. Preliminary procedures

Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Drive the machine to the appointed recharging area. Turn the ignition key (80) to “0”. Grasp the handle (41) and carefully lift the tank (40). For WET batteries only:

• Check the level of electrolyte inside the batteries (52); if necessary, top up through the caps (53).
• Then leave all the caps (53) open for battery charging.
• If necessary, clean the upper surface of the batteries. Charge the batteries according to one of the following procedures, depending on the presence of the battery charger (90). Charging the batteries with an external battery charger

Check that the battery charger is suitable by referring to the Battery Charger Manual. The battery charger voltage rating is 24 Disconnect the battery connector (12) and connect it to the external battery charger. Connect the battery charger to the electrical mains. After charging, disconnect the battery charger from the electrical mains and from the battery connector (12). (For WET batteries only): Check the level of electrolyte inside the batteries and close all the caps (53). Connect the battery connector (12) to the machine. Grasp the handle (41) and carefully lower the tank (40). Battery charging with (optional) battery charger installed on the machine 14. Connect the battery charger cable (6) to the electrical mains (the electrical mains voltage and frequency must be compatible with the battery charger values shown on the machine serial number plate (34)). When the battery charger is connected to the electrical mains, all machine functions are automatically cut off. The red warning light (81c) is on when the battery charger is charging the batteries.

15. When the green warning light (81a) turns on, the battery charging is completed.

16. When the battery charging is completed, disconnect the battery charger cable (6) from the electrical mains and wind it round its housing (7).

17. Grasp the handle (41) and carefully lower the tank (40).

NOTE For further information about the operation of the battery charger (5), see the relevant Manual. BA 651 - BA 751 - BA 851 - BA 751 C 9097293000(2)2009-12 A.indb 23 9097293000(2)2009-12 A

17/12/2009 16.35.51 USER MANUAL ENGLISH SQUEEGEE CLEANING NOTE The squeegee must be clean and its blades must be in good conditions in order to get a good drying. CAUTION! It is advisable to wear protective gloves when cleaning the squeegee because there may be sharp debris.

Drive the machine on a level floor. Turn the ignition key (80) to “0”. Lower the squeegee (25) with the lever (10). Loosen the handwheels (26) and remove the squeegee (25). Disconnect the vacuum hose (15) from the squeegee. Wash and clean the squeegee (Fig. 5). Clean the compartments (A, Fig. 5) and the hole (B) especially. Check the front blade (C) and the rear blade (D) for integrity, cuts and tears; if necessary replace them (see the procedure in the following paragraph). Install the squeegee in the reverse order of removal.

Clean the squeegee (Fig. 5) as shown in the previous paragraph. Check that the edges (E) of the front blade (C) and the edges (F) of the rear blade (D) lay down on the same level, along their length; otherwise adjust their height according to the following procedure:

• Remove the tie rod (G), disengage the fasteners (M) to adjust the rear blade (D); then engage the fasteners and install the tie rod.
• Loosen the handwheels (I) and adjust the front blade (C); then tighten the handwheels. Check the front blade (C) and rear blade (D) for integrity, cuts and tears; if necessary replace them as shown below. Check the front corner (J) of the rear blade for wear; if necessary, overturn the blade to replace the worn corner with an integral one. If the other corners are worn too, replace the blade according to the following procedure:
• Disengage the tie rod (G), disengage the fasteners (M), remove the retaining strip (K) and replace/overturn the rear blade (D). Install the blade in the reverse order of removal.
• Unscrew the handwheels (I) and remove the retaining strip (L), then replace the front blade (C). Install the blade in the reverse order of removal. After the blade replacement (or overturning), adjust the height as shown in the previous step. Connect the vacuum hose (15) to the squeegee. Install the squeegee (25) and screw down the handwheels (26). If necessary, adjust the squeegee balance adjusting handwheel (27).

CAUTION! It is advisable to wear protective gloves when cleaning the brushes/pads because there may be sharp debris.

Remove the brushes/pads from the machine, as shown in Use chapter. Clean and wash the brushes/pads with water and detergent. Check the brushes/pads for integrity and wear; if necessary replace them. On the machines equipped with the cylindrical brush deck, remove the debris container (D, Fig. 3) by pulling it on one side with the handle (E). Empty and wash the debris container (D), and then install it by engaging it on the fasteners. TANK AND VACUUM GRID WITH FLOAT CLEANING, AND COVER GASKET CHECK

Drive the machine to the appointed disposal area. Turn the ignition key (80) to “0”. Open the cover (A, Fig. 6). Drain the water from the tanks with the hoses (16 and 17). Wash with clean water the cover (A), the tanks (B and C) and the vacuum grid with automatic shut-off float (D). If necessary, release the fasteners (E) and open the grid (D), recover the float (F), clean all the components and then reinstall them. Remove and clean the debris tray (M). Check the tank cover gasket (G) for integrity. NOTE The gasket (G) creates vacuum in the tank that is necessary for vacuuming the recovery water.

If necessary replace the gasket (G) by removing it from its housing (H). When assembling the new gasket, install the joint (I) in the rear central area, as shown in the figure. Check that the seating surface (J) of the gasket (G) is integral and adequate for the gasket itself. NOTE The hole (K), allowing to compensate the air in the cover air gap, contributes to create vacuum in the tank.

Close the cover (A).

17/12/2009 16.35.52 USER MANUAL ENGLISH BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY The machine can be equipped with either the brush/pad-holder deck (18) or the cylindrical brush deck (19). NOTE When the deck is installed/removed, it may be necessary to change the squeegee too, because they must have the same width. For correct matching of deck and squeegee, see the Squeegee Installation paragraph. Disassembly

Drive the machine on a level floor. Remove the brushes/pad-holders according to the procedure shown in the relevant paragraph. Do not remove the cylindrical brushes.

3. Turn the ignition key (80) to “I”.

4. Lower the brush/pad-holder deck by pressing the switch (71).

5. Turn the ignition key (80) to “0”.

6. Remove the safety pins (A, Fig. 7) and [for brush/pad-holder deck (18) only] the mounting pin (B).

7. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Close the cover (22).

8. Grasp the handle (41) and carefully lift the tank (40) to reach the deck electrical connection.

9. Disconnect the red connector (C) and (for cylindrical brush deck only) the white connector (D).

10. Disconnect the solution hose union (E).

11. Unscrew the mounting handwheel (F), then remove the brush/pad-holder deck (G).

12. Assemble the components in the reverse order of disassembly, and note the following:

• When the cylindrical brush deck (19) is installed, the white connector (D) must be connected.
• When the brush/pad-holder deck (18) is installed, fasten the lever with the pin (B).

Drive the machine on a level floor. Turn the ignition key (80) to “0”. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Grasp the handle (41) and carefully lift the tank (40). Check that the pre-filter is clean. If necessary clean it with water and compressed air, then install it. Perform steps 1, 2, 3 and 4 in the reverse order.

SOLUTION/CLEAN WATER FILTER CLEANING

Drive the machine on a level floor. Turn the ignition key (80) to “0”. Close the solution tap (A, Fig. 8) under the machine, behind the left rear wheel. The tap (A) is closed when it is in the position (B) and it is open when it is in the position (C). Remove the transparent cover (D) and the gasket (E), then remove the filter strainer (F). Clean and install them on the support (G). NOTE Install the gasket (E) and the filter strainer (F) properly on the cover (D) and on the support (G).

Open the tap (A) by turning it to position (C).

DETERGENT TANK CLEANING

(For machines with EDS™ - ECO Dosage Solution) Clean the detergent tank (45) according to the following procedure:

1. Drive the machine to the appointed disposal area.

2. Open the cover (22) and check that the recovery tank (21) is empty, otherwise empty it with the drain hose (16). Close the cover (22).

3. Grasp the handle (41) and carefully lift the tank (40).

4. Unscrew the plug (46) and disconnect the hose from the tank (45).

6. Wash the tank in the appointed disposal area.

7. Install the tank (45) and connect the hose.

8. After draining the detergent tank, drain the EDS™ - ECO Dosage Solution too by running the system with clean water only (see the procedure in the next paragraph).

EDS™ - ECO DOSAGE SOLUTION DRAINING

(For machines with EDS™ - ECO Dosage Solution) 1. Clean the detergent tank according to the procedure shown in the previous paragraph. To remove the detergent remained in the hoses and in the pump, perform the following procedure.

2. Grasp the handle (41) and carefully lower the tank (40).

3. Turn on the machine by turning the ignition key (80) to “I”.

4. Turn on the EDS™ - ECO Dosage Solution by pressing the switch (77). Check that the switch warning light (78) turns on. 5. Press the switches (77) and (82a) at the same time, until the switch warning light (78) starts flashing (after about 5 seconds).

6. Release the switches and wait for the warning light (78) to stop flashing and for the vacuum system to turn on.

7. Collect the detergent remained on the floor.

8. Turn the ignition key (80) to “0”.

9. Grasp the handle (41) and carefully lift the tank (40), then check that the hose (48) is empty, otherwise perform steps 3 to 9 again. NOTE The draining cycle lasts about 30 seconds, then the vacuum function automatically turns on, which allows to remove the detergent remained. The draining cycle can also be performed with the detergent tank (45) full of water, thus cleaning the system thoroughly. It is advisable to perform the draining cycle when the EDS™ - ECO Dosage Solution is really dirty/encrusted because the machine has not been used/cleaned for a long time. The draining cycle can be performed also to quickly fill the detergent supply hose when the tank (45) is full but the system is still empty. If necessary, the draining cycle can be repeatedly performed.

FUSE CHECK/REPLACEMENT

Disconnect the battery connector (12). Move aside the recovery water drain hose (16). Remove the battery charger cable (L, Fig. 9) from the cable holder (J). Remove the screws (A) and carefully move aside the panel (B) by disengaging the grommet (K) from its housing on the panel (B). Check/replace the following fuses: (A): Brush deck fuse F1: (50 A) (B): Vacuum system fuse F2: (30 A) (C): Drive system fuse F3: (60 A) (D): Signal circuits fuse F4: (3 A) (E): Brush/pad-holder release fuse F5: (20 A) (F): Pump fuse F6: (3 A) (G): Actuator fuse F7: (10 A) Perform steps 1 to 4 in the reverse order.

17/12/2009 16.36.09 ENGLISH USER MANUAL TROUBLESHOOTING Trouble Possible Cause Remedy The battery connector is disconnected. Connect. The batteries are discharged. Charge the batteries. The machine does not move. The machine has been turned on by using the ignition key (80) and by keeping the paddle (83) pressed. Turn the ignition key (80) to “0”, then try to start the machine without pressing the paddle (83). The brushes do not work, the red warning light is on. The batteries are discharged. Charge the batteries. The brush motors are overloaded. Use less aggressive brushes and/or avoid working with extra pressure turned on. There are foreign materials (tangled threads, etc.) preventing the brushes from rotating. Clean the brush hubs. The recovery tank is full. Empty the tank. The hose is disconnected from the squeegee. Connect. The vacuum grid is clogged or the float is closing. Clean the grid or check the float. The debris tray is clogged. Clean. The squeegee is dirty, or the squeegee blades are worn or damaged. Clean and check the squeegee. The tank cover is not properly closed, or the gasket is damaged. Close the cover properly or replace the gasket. The solution/clean water tap is closed. Open the tap. The solution/clean water filter is dirty. Clean the filter. The EDS™ - ECO Dosage Solution tank (optional) is dirty/encrusted. Drain. There is debris under the squeegee blades. Remove the debris. The motors do not work; no warning light turns on. The warning lights (81) flash simultaneously. The recovery water vacuuming is insufficient. The solution flow is insufficient. The squeegee leaves marks on the floor. The squeegee blades are worn, chipped or torn. Replace the blades. The squeegee is not balanced with the handwheel. Adjust. NOTE If the machine has an optional battery charger installed, the machine cannot operate if the charger is not on board. In case of battery charger malfunction, contact an authorised Service Center. For further information refer to the Service Manual, available at any Nilfisk Service Center. SCRAPPING Have the machine scrapped by a qualified scrapper. Before scrapping the machine, remove and separate the following materials, which must be disposed of properly according to the Law in force: Batteries Brushes/pads Plastic hoses and components Electrical and electronic components (*)

Refer to the nearest Nilfisk Center especially when scrapping electrical and electronic components.