DeWalt DP3900 - Manual (Page 11)

11
English
1. Pull quick-connect coupler back and insert
nozzle.
2. Release quick-connect coupler and
twist nozzle to make sure it is secure in
coupler.
WARNING: Flying object could cause risk
of serious injury. Ensure nozzle is completely
inserted in quick-connect socket and quick-
connect snap ring is fully engaged (forward)
before squeezing gun trigger.
Chemicals and Cleaning Solvents
Applying chemicals or cleaning solvents is a low-pressure operation.
NOTE: Use only soaps and chemicals designed for pressure washer
use. Do not use bleach.
TO APPLY CHEMICALS AND SOLVENTS
1. Press chemical hose (T) onto barbed
T
fitting located near high pressure hose
connection of pump as shown.
2. Place the other end of chemical hose
with filter on it into the container holding
chemical/cleaning solution.
NOTE: For every 7 gallons (26.5 liters)
of water pumped 1 gallon (3.8 liters) of chemical/cleaning solution
will be used.
3. Install low-pressure (black) nozzle into quick connect fitting of spray
wand, refer Spray Wand Nozzles.
4. After use of chemicals, place chemical hose into container of clean
water and draw clean water through chemical injection system
to rinse system thoroughly. If chemicals remain in the pump it
could be damaged. Pumps damaged due to chemicals will not be
covered under warranty.
Yellow
15˚ intense
cleaning of
small areas metal, concrete
or wood
Green
25 ˚ intense
cleaning of
larger areas metal, concrete
or wood
White
40 ˚ covers wide
areas of
cleaning metal, concrete,
wood or vinyl
Black
low pressure applies cleaning
solutions metal, concrete,
wood or vinyl
* CAUTION: The high-pressure spray from your pressure washer
is capable of causing damage to surfaces such as wood, glass,
automobile paint, auto striping and trim, delicate objects such
as flowers and shrubs. Before spraying, check the item to
be cleaned to assure yourself that it is strong enough to resist
damage from the force of spray.
CHANGING NOZZLES ON SPRAY WAND
DANGER: Risk of fluid injection. Do not direct discharge stream
toward persons, unprotected skin, eyes or any pets or animals.
Serious injury will occur.
WARNING: Flying objects could cause risk of serious injury. DO
NOT attempt to change nozzles while pressure washer is running.
Turn engine off before changing nozzles.