Graco AquaMax 3540GHW, Instructions Manual

Page: 15 / 38

15
OPERATING INSTRUCTIONS
Cleaning with Detergents
Refer to “Detergent Cleaning Precautions” pg. 4 before
working with detergents. Be certain to wear protective
safety attire.
Prepare detergent solution according to label directions.
Never pump acids, alkaline, abrasive fluids or solvents
through the unit.
NOTICE
This feature is designed for use with mild detergents
only. Since the cleaning solution travels through
the heat exchanger coil, Do Not use corrosives as
they will cause extensive damage as well as pose a
considerable safety hazard.
• Some units are equipped with adjustable detergent
knobs. Locate the clear vinyl hose which leads to the
pump head.
• If your injector is equipped with an adjustment knob
on the pump head, you may adjust the amount of
detergent desired by turning the knob completely
counterclockwise to set at the maximum siphon rate.
• If your injector is not equipped with an adjustment
knob, the detergent ratio is preset and cannot be
adjusted.
1. Fully immerse the detergent strainer end of the clear
vinyl hose into the detergent solution to allow detergent
to siphon.
2. Adjust the grip on the dual lance assembly. Turn the
knob completely clockwise for low pressure detergent
operation.
Note: This injection system is designed to apply
detergents under low pressure only. It will not allow
detergent solutions to be introduced into the system
unless the dual lance assembly is set in the low pres-
sure detergent mode.
3. To apply solution; unlock the trigger gun and squeeze
the trigger. In a few moments a detergent/water mixture
will exit the nozzle. Start spraying the lower portion
of the surface being cleaned and move up, using long
overlapping strokes. Applying from the bottom up
helps avoid streaking. Allow to soak briefly. Do not
allow detergent solution to dry on the surface. (Avoid
working on hot surfaces or in direct sunlight to minimize
the chances of the detergent drying, which may result
in damaging painted surfaces.) Be certain to rinse a
small section at a time.
4. To rinse; lock the trigger gun in the “OFF” position, rotate
the adjustable grip on the dual lance counterclockwise
for high pressure. Unlock the trigger gun and spray. It
will take about 30 seconds to purge all detergent from
the line. For best rinsing results, start at the top and
work down.
5. Siphon a gallon of water through the low pressure
detergent injection system after each use. This
prevents the possibility of corrosion or detergent
residue causing mechanical problems during the next
use.
Shutdown
1. Move the burner switch to the “OFF” position.
2. Squeeze the trigger and discharge the water for a
period of three minutes to cool the heat exchanger and
high pressure hose. (Insufficient cool down period of
the high pressure hose will cause excessive wear and
eventually rupturing of the hose.)
3. Do Not close the choke to stop the engine. Backfire or
engine damage may occur.
4. Move the engine On/Off Switch to the “OFF”
position.
5. Close the engine fuel shut-off valve.
6. Turn off the water supply and pointing the gun in a
safe direction, trigger the gun momentarily to relieve
trapped pressure.
7. Disconnect, drain, and store hoses. Store unit in a
non-freezing environment.