Selecting The Mode; Sequential Mode; Rapidcycle Mode; Pin/Fastener Troubleshooting - DeWalt DCN890 Original Instructions Manual

Speed Setting Application
Fastening Steel/Wood to Low Strength
1
Concrete/Masonry (<4000 psi)
Fastening Steel/Wood to High Strength
2
Concrete (>4000 psi)
Fastening to structural steel;
3
2x4 to Concrete

WARNING: Pins must be driven straight into the material.
Do not tilt nailer while driving fasteners. Refer to Fig. H.
Pin retention values improve when the tool is fired
perpendicular to the material.
The tool can be fired/actuated by pulling the trigger
of two modes: sequential mode or RapidCycle mode. Refer
to Selecting the Mode for detailed instructions for firing in
each mode.
Selecting the Mode (Fig. A, G)
To select standard sequential mode, slide the mode selector
switch 4 to display the single arrow ( ) icon.
To select rapid sequential operating mode (RapidCycle), slide
the mode selector switch 4 to display the double arrow
( ) icon.
nOTE: Battery life in RapidCycle mode will be shorter than
in standard sequential mode. Leaving the tool in standard
sequential will give maximum battery life.

Sequential Mode

The sequential mode is used for intermittent nailing. It offers the
maximum battery life for driving pins.
1. Using the mode selector switch
sequential mode.
2. Release the trigger lock-off
3. Push the contact trip against the work surface.
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4. Pull the trigger switch 1 to actuate the tool.
5. Release the trigger and raise the nailer from the
work surface.
6. Repeat steps 3–5 to actuate the next nail.

RapidCycle Mode

In RapidCycle mode, the motor rotation speed is automatically
restored after driving a pin to allow fast consecutive nailing.
While offering the ability to drive more pins in less time, this
mode quickly depletes the battery charge.
1. Using the mode selector switch
RapidCycle mode.
2. Release the trigger lock-off
3. Push the contact trip 6 against the work surface.
4. Pull the trigger switch 1 to actuate the tool.
5. Release the trigger and raise the nailer from the work
surface. nOTE: The tool motor returns to full speed
automatically without the contact trip
6. Repeat steps 3–5 to actuate the next nail.
Typical Pin Length
19-25 mm
19-29 mm
13-57 mm
in one
1
, select the
4
2 .
4 to select the
.
2
6 being depressed.

Pin/Fastener Troubleshooting

Properly driven pin
CONCRETE
Pin does not hold in the concrete.
Cause:
-
-
Action:
-
-
Pin does not drive deep enough.
Cause:
-
-
Action:
-
-
Pin drives too deep.
Cause:
-
-
Action:
-
-
Pin bends.
Cause:
-
-
-
Action:
-
-
-
English
Over driven pin
Too hard/high strength
concrete
Hard or large aggregate
in concrete
Use shorter pin.
Switch to higher speed setting.
Pin too long
Speed setting too low
Use shorter pin.
Switch to higher speed setting.
Pin too short for application
Speed setting too high
Use longer pin.
Switch to lower speed setting.
Pin hit large aggregate on entry
Too hard/high strength
concrete
Pit hit rebar just under surface
Use shorter pin.
Make sure nailer is
perpendicular to the work
surface.
Move 8 cm and try again.
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