R/Evolution ND-20 User manual

ND-20

INTRODUCTION
This manual is furnished with each new model.
It provides necessary operation and maintenance instructions.
Read this manual completely and understand the machine
before operating or serving it.
This machine will provide excellent service. However, the best results will be
obtained at minimum costs if:
- The machine is operated with reasonable care.
- The machine is maintained regularly - per the maintenance instructions
provided.
- The machine is maintained with manufacturer supplied or equivalent parts
INTENDED USE
ND-20 The automatic floor scrubber is intended for commercial use, for
example in hotels, schools, hospitals, factories, shops, offices and rental
businesses. It is designed to scrub hard floor surfaces (concrete, tile,
stone, synthetic, etc.) in an indoor environment. Do not use this machine
on carpeted surfaces. Use only recommended pads/brushes and
commercially available floor cleaning detergents. Do not use this machine
other than described in this Operator Manual.

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IMPORTANT SAFTY INSTRUCTIONS
The following warning precautions
are used throughout this manual as
indicated in their description:
WARING：
- To warn of hazards or unsafe
practices which could result in
severe personal injury or death.
FOR SAFETY: To identify actions
which must be followed for safe
operation of equipment.
The following information signals
potentially dangerous conditions to
the operator. Know when these
conditions can exist. Locate all
safety devices on the machine.
Report machine damage or faulty
operation immediately.
WARING：：
ToReduce the Risk of Fire, Explosion,
Electric Shock or Injury:
-Read manual before operating
machine.
-Do not use or pick up flammable
materials
Do not use near flammable liquids,
vapors or combustible dusts.
This machine is not equipped with an
explosion proof motor. The electric
motor will spark upon start up and
during operation which could cause a
flash fire or explosion if machine is
used in an area where flammable
vapors/liquids or combustible dusts
are present
-Batteries emit hydrogen gas.
Explosion or fire can result. Keep
sparks and open flame away when
charging.
-Disconnect battery cables and
charger cord before cleaning and
servicing machine.
-Do not charge batteries with
damaged cord. Do not modify
plug.
If the charger supply cord is damaged
or broken, it must be replaced by the
manufacturer or its service agent or a
similarly qualified person in order to
avoid a hazard.
-Do not use outdoors. Store indoors.
-Spinning pad/brush, keep hands
away.
WARNING: Magnetic Field
Hazard. Magnetic pad driver/brush can
be harmful to pacemaker wearers or
medical implants.
FOR SAFETY:
1.Do not operate machine:
-Unless trained and authorized.
-Unless operator manual is read and
understood.
-Unless mentally and physically
capable of following machine
instructions.

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-Under the influence of alcohol or
drugs.
-While using a cell phone or other
types of electronic devices.
-If not in proper operating condition.
-In outdoor areas. This machine is for
indoor use only.
-In areas where flammable
vapors/liquids or combustible dusts
are present.
-With pads or accessories not
supplied or approved by cwz. The
use of other pads may impair safety.
-In areas with possible falling
objects.
-In areas that are too dark to safely
see the controls or operate machine.
2 ,Before operating machine:
-Check machine for fluid leaks.
-Make sure all safety devices are in
place and operate properly.
3When operating machine:
-Use only as described in this
manual.
-Report machine damage or faulty
operation immediately.
-Wear closed- toe, non- slip work
shoes.
-Reduce speed when turning.
-Go slowly on inclines and slippery
surfaces.
-Do not scrub on inclines that exceed
9%
-grade or transport on inclines that
exceed 21% grade.
-Follow site safety guidelines
concerning wet floors.
-Follow mixing, handling and
disposal instructions on chemical
containers.
-Do not carry passengers on
machine.
-Use care when reversing machine.
-Keep children and unauthorized
persons away from machine.
-Do not allow machine to be used as
a toy.
4.Before leaving or servicing
machine:
-Stop on level surface.
-Turn off machine and remove key.
5.When servicing machine:
-Disconnect battery connection and
charger cord before working on
machine.
-All work must be done with
sufficient lighting and visibility.
-All repairs must be performed by
trained personnel.
-Use Tennant supplied or approved
replacement parts.
-Do not modify the machine from its
original design.
-Do not jack up machine.
-Avoid moving parts. Do not wear
loose clothing or jewelry and secure
long hair.
-Do not disconnect the off- board
charger’s DC cord from the
machine’s receptacle when the
charger is operating. Arcing may
result. If the charger must be
interrupted during charging cycle,
disconnect the AC power supply
cord first.
-Do not use incompatible battery
chargers as this may damage
battery packs and potentially cause
a fire hazard.
-Inspect charger cord regularly for
damage.
-Keep work area well ventilated.

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-Avoid contact with battery acid.
-Keep all metal objects off batteries.
-Do not power spray or hose off
machine.
-Use a hoist or adequate assistance
when lifting batteries.
-Battery installation must be done by
trained personnel.
-Wear personal protection equipment
as needed and where recommended
in this manual.
For Safety: wear protective gloves.
For Safety: wear eye protection.
6.When loading/unloading
machine onto/off truck or trailer:
-Drain tanks before loading machine.
-Use a ramp, truck or trailer that can
support the machine weight and
operator.
-Do not operate the machine on a
ramp incline that exceeds a 21%
grade level.
-Use a winch if ramp incline exceeds
a 21% grade level.
-Lower the scrub head and squeegee
before tying down machine.
-Turn machine off and remove key.
-Set parking brake (if equipped).
-Block machine wheels.
-Use tie- down straps to secure
machine.

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SAFETY LABELS
The safety labels appear on the
machine in the locations indicated.
Replace labels if they are missing
or become damaged or illegible.
WARNING LABEL -
Flammable materials or reactive
metals can cause an explosion or
fire. Do not pick up.
Located near control console.
Located on control console and bottom
side of recovery tank.
WARNING LABEL -
Batteries emit hydrogen gas. Explosion
or fire can result. Keep sparks and
open flame away when charging.
WARNING LABEL –
Magnetic field
hazard. Magnetic
pad driver/brush
can be harmful to
pacemaker wearers
or medical implants.
Located on
Insta-Click
magnetic pad
driver/brush.

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11
12
15
17
13
15
18
19
14
20
16
OPERATION
MACHINE COMPONENTS
1.Cup holder/tray
2.Recovery tank lid
3.Recovery tank
4.Solution tank fill-port
5.Scrub head
6.Solution tank
7. Accessory rail(s)
8.Scrub head lift pedal
9.Squeegee foot pad
10.Squeegee assembly
11.Control handle
12.Control handle start bail
SCRUB HEAD TYPES
13.Speed control knob (drive model)
14. Emergency stop button(drive model)
15. Recovery tank drain hose
16. Solution flow control knob
17. Forward/Reverse lever(drive model)
18. Control panel display
19. Key switch
DISK
MAGNETIC
1
2
3
4
5
6
8
9
10
7

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20. Off-board battery charger receptacle
INSTALLING BATTERIES
WARNING: Batteries emit
hydrogen gas. Explosion or fire
can result. Keep sparks and open
flame away when charging.
BATTERY SPECIFICATIONS
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, turn off machine,
remove key and set parking
brake if equipped.
1 Lift the recovery tank to access the
battery compartment (Figure 1).
2、With adequate assistance, carefully
install the batteries into the battery
compartment. Arrange the batteries as
shown
FOR SAFETY: When servicing
machine, use a hoist or adequate
assistance when lifting batteries.
3, Using the supplied battery post
boots, connect the cables to the
battery posts as shown (Figure
2). Connect the machine’s black
(- ) battery cable last. Use
insulated tools when working
near batteries.
HOW THE MACHINE WORKS
Conventional scrubbing:
When using the conventional
scrubbing mode, water and
detergent mixture from the
solution tank flows to the floor
and the rotating brush(es)/pad(s)
scrub the floor clean. As the
machine moves forward, the
squeegee with vacuum suction
picks up the dirty solution from
the floor into the recovery tank.
BRUSH AND PAD INFORMATION
For best cleaning results use the
appropriate brush or pad for your
cleaning application. Listed below
are brushes and pads and the
applications for which each is best
suited.
NOTE: The amount and type of
soilage play an important role in
determining the type of brush or
pad to use. Contact a Tennant
representative for specific
recommendations.

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Soft nylon bristle scrub brush
(White) - Recommended for cleaning
coated floors without removing finish.
Cleans without scuffing.
Polypropylene bristle scrub brush
(Black) -
This general purpose polypropylene
bristle scrub brush is used for
scrubbing lightly compacted soilage.
This brush works well for maintaining
concrete, wood and grouted tile
floors.
Super abrasive bristle scrub brush
(Gray)
- Nylon fiber impregnated with
abrasive grit to remove stains and
soilage. Strong action on any
surface.Performs well on buildup,
grease, or tire marks.
Polishing pad (White) -
Used to maintain highly polished or
burnished floors.
Buffing pad (Red) - Used for light
duty scrubbing without removing
floor finish.
Scrubbing pad (Blue) - Used for
medium toheavy-duty scrubbing.
Removes dirt, spills, and scuffs and
leaves surface clean ready for
recoating.
Stripping pad (Brown) - Used for
stripping of floor finish to prepare the
floor for recoating.
Heavy duty stripping pad (Black) -
Used for aggressive stripping of
heavy finishes/sealers, or very heavy
duty scrubbing.
Surface preparation pad (Maroon)
-Used for very aggressive chemical
free removal of floor finish to prepare
the floor for re-coating

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MACHINE SETUP
ATTACHING SQUEEGEE ASSEMBLY
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, turn off machine, remove key
and set parking brake if equipped.
1. Lift the squeegee mount bracket to the
raised position. Place toe under pedal to
lift
2、Mount the squeegee assembly to the
squeegee mount bracket Tighten knobs
to secure squeegee assembly to bracket.
3、Connect the vacuum hose to the squeegee
assembl
INSTALLING BRUSH/PAD
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, turn off machine, remove
key and set parking brake if
equipped.
1、Step down on the scrub head lift pedal to
raise the scrub head off the floor。
2、Attach the pad to the pad
driver before installing the disk
Secure pad with centerlock.
FOR SAFETY: Do not operate
machine with pads or accessories
not supplied or approved by us.
The use of other pads may impair
safety.
3、Single disk model - Position the

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three lugs into the motor hub slots
and give the pad driver/brush a quick
counter-clockwise turn to engage
hub (Figure 10). View through the
scrub head window to align lugs.
4. Single disk model - To remove the pad
driver/brush, press down on the plunger and
turn the pad driver/brush clockwise
INSTALLING BRUSH/PAD -
Insta-Click Magnetic Disk
WARNING: Magnetic Field
Hazard.
Magnetic pad driver/brush can
be harmful to pacemaker
wearers or medical implants.
1.Step down on the scrub head lift pedal to raise
the scrub head off the floor
2、Attach the pad to the pad
driver before installing the
driver (Figure 15). Secure
pad with centerlock.
FOR SAFETY: Do not operate
machine with pads or accessories
not supplied or approved by us.
The use of other pads may impair
safety.
3、Place the pad driver/brush under
the scrub head and lift into position.
The Insta-Click pad driver/brush will
automatically click into
position

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4、To remove the pad
driver(s)/brush(es), raise the
scrub head and press the
yellow plunger button with
foot or hand (Figure 17).
Pad will drop to floor.
FILLING SOLUTION TANK
Remove the solution tank lid and fill the
solution tank. Stop filling tank when the level
reaches the “3/3” mark on the solution tank
drain hose indicator
WARNING: Flammable materials can
cause an explosion or fire. Do not use
flammable materials in tank(s).
ATTENTION: For Conventional
Scrubbing, only use commercially
approved cleaning detergents. Machine
damage due to improper detergent
usage will void the manufacturer’s
warranty.
ACCESSORY RAILS
The machine is equipped with one or two
accessory rails which straddle the control
console. The left side rail also serves as
the recovery tank and solution tank drain
hose holder.
Control panel operation
FD50 panel
1、Panel
2、power
3、EOC
4、Water adjust
5、Set up
6、Speed control switch
7、Forward and back switch
6
7
1
5
2
3
4

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F50 panel
1、Panel
2、Power
3、EOC
4、Water adjust
5、Set up
MACHINE OPERATION
OPERATION CHECK LIST
1、Sweep area and remove any
obstructions.
2、Check the battery gauge
3、Check whether the power supply
of the model is connected
correctly.
4、Check brushes/pads for wear and
damage.
5、Check squeegee blades for wear
and damage.
6、Confirm recovery tank empty and
screen and debris tray is clean.
7、Check scrub head skirt for wear
and damage.
OPERATING MACHINE
Turn the key
1、Press the power button
2、Lower the scrub head to the floor by
stepping on the scrub head lift pedal as
shown。
3. Lower the squeegee assembly to
floor by stepping on foot pad as
shown (Figure 67). To raise
squeegee assembly, place toe
under foot pad and lift. The
vacuum motor will start when
squeegee assembly is lowered.
1
5
2
3
4
Drive
Without drive

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5、To begin scrubbing, pull the
startbail
6、water adjust
7、Drive models - push the directional lever to
the forward position to go forward
8、Drive models - Adjust the scrubbing speed
by turning the speed dial to the desired speed
WHILE OPERATING MACHINE
WARNING: Flammable
materials materials or reactive metals
can cause an explosion or fire. Do not
pick up.
1.Overlap each scrub path by 2 inches (5 cm).
2.Keep machine moving to prevent damage to
floor finish.
3. Wipe squeegee blades with a cloth if blades
leave streaks.
4. Avoid bumping the machine into posts and
walls.
5. When draining and refilling machine, always
top off the optional Severe Environment tank
with detergent.
FOR SAFETY: When operating machine,
do not scrub on inclines that exceed 9%
grade or transport on inclines that
exceed 21% grade.
6、Pour a recommended foam control solution
into the recovery tank if excessive foam
appears.
ATTENTION: Foam buildup will not
activate the float shut-off screen,
vacuum motor damage will result.
7、When leaving the machine
unattended, remove the key and set the
parking brake, if equipped.

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8、Do not operate machine in areas
where the ambient temperature is
above 110 F/43 C or below
freezing 32 F/0 C.
EMERGENCY SHUT-OFF BUTTON
(Drive models)
Push the emergency shut-off button in
the event of an emergency This red
button shuts off all power to machine. To
regain power, turn the button clockwise
and restart the key.
BATTERY DISCHARGE INDICATOR
Voltageindicator
Time indicator
DRAINING TANKS
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, turn off machine,
remove keyand set parking brake
if equipped.
DRAINING RECOVERY TANK
Drain and clean the recovery tank
daily and between solution tank
refills.
1、Transport the machine to drain
area
2.For models equipped with drain hose caps,
hold the hose upward, remove cap then slowly
lower hose to drain.
NOTE: When using a bucket to drain the
machine, do not use the same bucket to fill the
solution tank.

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3、Remove and clean the float shut-off screen。
4、Remove the debris tray and empty。
5、Rinse out the recovery tank with clean
water and wipe clean of any soil residue
DRAINING SOLUTION TANK
Drain the solution tank daily.
1、Transport the machine to drain area.
2.Todrain remaining water from solution tank,
pull the solution hose from the accessory rail
3、Rinse out solution tank with clean water
4、Remove the solution tank filter and clean
screen after every 50 hours of use (Figure 85).
Solution filter is located under machine at rear.
Drain solution tank before removing filter.

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SERVICE INDICATOR CODES
Interval
Person
key
Description
Procedure
Daily
O
3
Pad(s)
Check, flip or replace
Daily
O
3
Brush(es)
Check, clean
Daily
O
1
Recovery tank
Drain, rinse, clean float shut-off screen and debris
tray if equipped
Daily
O
9
Solution tank
Drain, rinse
Daily
O
7
Squeegee
Clean, check for damage and wear
Daily
O
8
Batteries
Charge if necessary
Daily
O
4
Scrub head skirt
Check for damage and wear
Daily
O
7
Squeegee assembly
drip trap reservoir
Check, clean
50 Hours
O
10
Recovery tank lid seal
Check for wear.
50 Hours
O
6
Solution tank filter
Clean
100 Hours
O
8
Batteries, terminals
and cables
Check and clean
750 Hours
T
1
Vacuum motor
Replace carbon brushes
1250
Hours
T
5
Drive motor
Replace carbon brushes
1250
Hours
T
2
Brush motor
Replace carbon brushes
1
2
3
4
5
6
7
8
9
10

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MACHINE MAINTENANCE
To keep the machine in good working
condition, simply perform the following
maintenance procedures.
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, turn off machine, remove
key and set parking brake if
equipped.
FOR SAFETY: When servicing
machine wear personal protection
equipment as needed. All repairs
must be performed by trained
personnel
AFTER DAILY USE
1、Drain and rinse out the recovery tank
2、Remove the debris tray and empty
3、Disk scrub head - Turn pad over or replace
when worn
4、Insta-Click pad driver/brushes - clean any
debris buildup from hub connection area
5、Wipe the squeegee blades clean. Inspect
blades for wear and damage Rotate blade if
worn. See SQUEEGEE BLADE REPLACEMENT.
6.Check the scrub head skirt for wear or
damage. Replace if worn or damaged.
7、Clean the outside surface of the machine
with an all purpose cleaner and damp cloth
8、Remove the drip trap cover from the
squeegee assembly and clean reservoir

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9、Charger for battery
AFTER EVERY 50 HOURS OF USE
1 Remove the solution tank filter
and clean screen Turn the filter
bowl counter-clockwise to remove.
Make sure to drain solution tank
before removing filter.
2.Inspect and clean the seal on the
recovery tank lid.replace seal if
damaged
Carbon Brush Replacement
Replace motor carbon brushes as
indicated. Contact trained
personnel for carbon brush
replacement.
Carbon brush
Hours
Vacuum motor
750
Propel motor (drive
model)
1250
Brush motor
1250

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Battery
Maintenance-free (Sealed AGM)
batteries do not require watering.
Cleaning and other routine
maintenance is still required.
CHECKING CONNECTIONS / CLEANING
After every 200 hours of use, check for
loose battery connections and clean the
surface of the batteries, including terminals
and cable clamps to prevent battery
corrosion. Use a scrub brush with a strong
mixture of baking soda and water. Do not
remove battery caps when cleaning
batteries.
CHARGING BATTERIES
The charging instructions in this
manual are intended for the battery
charger supplied with your machine.
The use of other battery chargers that
are not supplied and approved by
Tennant are prohibited.
If your machine is equipped with an
off-board battery charger refer to the
charger’s owners manual for
operating instructions. Contact
distributor or Tennant for battery
charger recommendations if machine
is not equipped with charger.
FOR SAFETY: The use of
incompatible battery chargers
may damage battery packs and
potentially cause a fire hazard.
IMPORTANT NOTICE: The battery
charger is set to charge the battery
type supplied with your machine. If
you choose to change to a different
battery type or capacity (i.e. flooded
(wet) lead-acid,
maintenance-free, sealed, AGM
batteries, etc.), the charger’s
charging profile must be changed to
prevent battery damage. See
BATTERY CHARGER SETTINGS.
1. Transport the machine to a
well-ventilated area.
WARNING: Batteries emit
hydrogen gas. Explosion or fire
can result. Keep sparks and open
flame away when charging.
2 .Park the machine on a flat, dry
surface, turn off machine and
remove key.
FOR SAFETY: When servicing
batteries, stop on level surface,
turn off machine, remove key and
set parking brake if equipped.
3.If the machine is equipped with
flooded (wet) lead- acid batteries
check the battery electrolyte level
weekly before charging. See
FLOODED (WET) LEAD-ACID
BATTERIES.
4.The charger will
automatically begin
charging and and shut off
when fully charged. The
maximum charging cycle may
take up to 6- 12 hours
depending on battery type.