DeWalt DHS790 - Important Safety Instructions for All Battery Packs; Battery Pack Handling and Storage

4
ENGLISH
• DO NOT REACH UNDERNEATH THE SAW unless it is unplugged and turned off. Contact with
saw blade may cause personalinjury.
• SECURE THE MACHINE TO A STABLE SUPPORTING SURFACE. Vibration can possibly cause
the machine to slide, walk, or tip over, causing seriousinjury.
• USE ONLY CROSSCUT SAW BLADES recommended for miter saws. For best results, do not
use carbide tipped blades with hook angles in excess of 7 degrees. Do not use blades with deep
gullets. These can deflect and contact the guard, and can cause damage to the machine and/or
seriousinjury.
• USE ONLY BLADES OF THE CORRECT SIZE AND TYPE specified for this tool to prevent
damage to the machine and/or seriousinjury.
• INSPECT BLADE FOR CRACKS or other damage prior to operation. A cracked or damaged
blade can come apart and pieces can be thrown at high speeds, causing serious injury. Replace
cracked or damaged bladesimmediately.
• CLEAN THE BLADE AND BLADE CLAMPS prior to operation. Cleaning the blade and blade
clamps allows you to check for any damage to the blade or blade clamps. A cracked or damaged
blade or blade clamp can come apart and pieces can be thrown at high speeds, causing
seriousinjury.
• DO NOT USE WARPED BLADES. Check to see if the blade runs true and is free from vibration. A
vibrating blade can cause damage to the machine and/or seriousinjury.
• DO NOT use lubricants or cleaners (particularly spray or aerosol) in the vicinity of the plastic
guard. The polycarbonate material used in the guard is subject to attack by certainchemicals.
• KEEP GUARD IN PLACE and in workingorder.
• ALWAYS USE THE KERF PLATE AND REPLACE THIS PLATE WHEN DAMAGED. Small chip
accumulation under the saw may interfere with the saw blade or may cause instability of
workpiece whencutting.
• USE ONLY BLADE CLAMPS SPECIFIED FOR THIS TOOL to prevent damage to the machine
and/or seriousinjury.
• CLEAN THE MOTOR AIR SLOTS of chips and sawdust. Clogged motor air slots can cause the
machine to overheat, damaging the machine and possibly causing a short which could cause
seriousinjury.
• NEVER LOCK THE SWITCH IN THE “ON” POSITION. Severe personal injury mayresult.
• NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is
unintentionallycontacted.
•

WARNING: Cutting plastics, sap coated wood, and other materials may cause melted
material to accumulate on the blade tips and the body of the saw blade, increasing the risk
of blade overheating and binding whilecutting.

WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses.
Also use face or dust mask if cutting operation is dusty. ALWAYS WEAR CERTIFIED
SAFETYEQUIPMENT:

WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicalsare:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treatedlumber.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well ventilated area, and work with approved safety
equipment, such as those dust masks that are specially designed to filter out microscopicparticles.
• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling, and
other construction activities. Wear protective clothing and wash exposed areas with
soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may promote
absorption of harmfulchemicals.

WARNING: Use of this tool can generate and/or disperse dust, which may cause serious
and permanent respiratory or other injury. Always use NIOSH/OSHA approved respiratory
protection appropriate for the dust exposure. Direct particles away from face andbody.

WARNING: Always wear proper personal hearing protection during use. Under some
conditions and duration of use, noise from this product may contribute to hearingloss.
• Air vents often cover moving parts and should be avoided. Loose clothes, jewelry or long
hair can be caught in movingparts.
The label on your tool may include the following symbols. The symbols and their definitions are
asfollows:
V ......................... volts
Hz .......................hertz
min ..................... minutes
or DC ......direct current
...................... Class I Construction (grounded)
…/min ..............per minute
BPM .................... beats per minute
IPM ..................... impacts per minute
RPM .................... revolutions per minute
sfpm ................... surface feet per minute
SPM .................... strokes per minute
A ......................... amperes
W ........................watts
or AC ...........alternating current
or AC/DC .... alternating or direct current
...................... Class II Construction (double insulated)
n
o
.......................no load speed
n .........................rated speed
......................earthing terminal
.....................safety alert symbol
.....................visible radiation
..................... wear respiratory protection
..................... wear eye protection
..................... wear hearing protection
..................... read all documentation
For your convenience and safety, the following warning labels are on your mitersaw.
ON MOTOR HOUSING:
TO REDUCE THE RISK OF INJURY, USER MUST READ INSTRUCTION MANUAL. WEAR EYE
PROTEXCTION AND RESPIRATORY PROTECTION. USE ONLY IDENTICAL REPLACEMENT PARTS.
DO NOT EXPOSE TO RAIN OR USE IN DAMPLOCATIONS.
ON MOVING FENCES:
ALWAYS ADJUST FENCE PROPERLY BEFORE USE. CLAMP SMALL PIECES BEFORE CUTTING.
SEEMANUAL.
ON GUARD:
DANGER–KEEP AWAY FROM BLADE.
ON UPPER GUARD:
PROPERLY SECURE BRACKET WITH BOTH SCREWS BEFOREUSE.
ON TABLE: (2 PLACES)

WARNING: KEEP HANDS AND BODY OUT OF THE PATH OF THE
SAW BLADE. CONTACT WITH BLADE WILL RESULT IN SERIOUS
INJURY. DO NOT OPERATE SAW WITHOUT GUARDS IN PLACE.
CHECK GUARDING SYSTEM TO MAKE SURE IT IS FUNCTIONING
CORRECTLY. DO NOT PERFORM ANY OPERATION FREEHAND.
NEVER REACH IN BACK OF SAW BLADE TURN OFF TOOL
AND WAIT FOR SAW BLADE TO STOP BEFORE MOVING WORKPIECE OR CHANGING
SETTINGS OR MOVING HANDS. NEVER CROSS ARMS IN FRONT OF BLADE. ALWAYS
TIGHTEN ADJUSTMENT KNOBS BEFORE EACH USE. DISCONNECT POWER BEFORE
CHANGING BLADE ORSERVICING.
ON TABLE: (2 PLACES)
Electrical Connection
Be sure your power source agrees with the nameplate marking. AC means that your saw will
operate on alternating current. Do not operate with DC power. A voltage decrease of 10 percent
or more will cause a loss of power and overheating. All DeWALT tools are factory tested. If this
tool does not operate, check the powersupply.
This miter saw operates on either two 60V battery packs or by using the DeWALT corded
powersupply.
Using the Corded Power Supply (Fig. B)
The DeWALT corded power supply is designed to provide power for DeWALT 120V Max*
FLEXVOLT cordless tools. Insert the corded power supply into the miter saw battery slot (refer to
Installing and Removing the Corded Power Supply into and from Tool and plug the power
supply into an AC outlet. The power supply will act as the power source to the tool. Your DeWALT
corded power supply should only be used with standard household power or a generator.
The corded power supply is suitable for use with both grounded and double insulated tools.
When the power supply is utilized with a grounded tool, the tool inlet will be equipped with a
ground prong that allows the ground path from the tool to connect to the power supply. When
the power supply is used with this double insulated miter saw, no ground connection is made
from the tool to the power supply as no ground connection isrequired.
Fig. B
Additional Specific Usage Instructions
The corded power supply may become warm to the touch during use. This is a normal condition
and does not indicate aproblem.
IMPORTANT. The power supply is not user serviceable. There are no user serviceable parts inside
the powersupply.
Servicing at an authorized service center is required to avoid damage to static sensitive
internalcomponents.
BATTERIES AND CHARGERS
The battery pack is not fully charged out of the carton. Before using the battery pack and charger,
read the safety instructions below and then follow charging proceduresoutlined. When ordering
replacement battery packs, be sure to include the catalog number andvoltage.