DeWalt DC820 Instruction Manual page 8

Minimum Gauge for Cord Sets
Volts Total Length of Cord in Feet (meters)
120V 25 (7.6) 50 (15.2) 100 (30.5)
240V 50 (15.2) 100 (30.5) 200 (61.0)
Ampere 150 (45.7)
Rating
300 (91.4)
More Not
Than More AWG
Than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended
• Do not place any object on top of charger or place the
charger on a soft surface that might block the ventilation
slots and result in excessive internal heat. Place the charger
in a position away from any heat source. The charger is ventilated
through slots in the top and the bottom of the housing.
• Do not operate charger with damaged cord or plug.
• Do not operate chargerifithas receiveda sharp blow, been
dropped, or otherwise damaged in any way. Take it to an
authorized service center.
• Do not disassemble charger, take it to an authorized service
center when service or repair is required. Incorrect reassembly
may result in a risk of electric shock, electrocution or fire.
• Disconnect the charger from the outlet before attempting
any cleaning. This will reduce the risk of electric shock.
Removing the battery pack will not reduce this risk.
• NEVER attempt to connect two chargers together.
• The charger is designed to operate on standard 120 volt
household electrical power. Do not attempt to use it on any
other voltage. This does not apply to the vehicular charger.
Using Automatic
Tune-Up
TM
Mode
The automatic Tune-Up
TM
Mode equalizes or balances the
individual cells in the battery pack allowing it to function at peak
capacity. Battery packs should be tuned up weekly or after
10 charge/discharge cycles or whenever the pack no longer delivers
the same amount of work. To use the automatic Tune-Up
TM,
place
the battery pack in the charger and leave it for at least 8 hours. The
charger will cycle through the following modes.
1. The red light will blink continuously indicating that the 1-hour
charge cycle has started.
2. When the 1-hour charge cycle is complete, the light will stay on
continuously and will no longer blink. This indicates that the pack
is fully charged and can be used at this time.
3. If the pack is left in the charger after the initial 1-hour charge, the
charger will begin the Automatic Tune-Up
TM
mode. This mode
continues up to 8 hours or until the individual cells in the battery
pack are equalized. The battery pack is ready for use and can be
removed at any time during the Automatic Tune-Up
TM
mode.
4. Once the Automatic Tune-Up
TM
mode is complete, the charger
will begin a maintenance charge; the red indicator will remain lit.
Chargers
Your tool uses a DEWALT charger. Be sure to read all safety
instructions before using your charger. Consult the chart at the end of
this manual for compatibility of chargers and battery packs.
Charging Procedure (Fig. 1)
.;_,DANGER: Electrocution hazard. 120 volts are present at charging
terminals. Do not probe with conductive objects. Electric shock or
electrocution may result.
1. Plug the charger into an appropriate outlet before inserting battery
pack.