10
MVC SERIES PRESSURE WASHER
OPERATOR’S MANUAL
LANDA MVC
•
#96-61836 • REV. 5/03
Rupture Disk:
If pressure from pump or thermal expansion should ex-
ceed safe limits, the rupture disk will burst allowing high
pressure to be discharged through hose to ground. When
disk ruptures it will need to be replaced.
Fuel:
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every 100
hours of operation.
Use No. 1 or No. 2 Heating Oil (ASTM D306) only.
NEVER
use gasoline in your burner tank. Gasoline is
more combustible than fuel oil and a serious explosion
could result.
NEVER
use crankcase or waste oil in your
burner. Fuel unit malfunction could result from contami-
nation.
Fuel Control System:
These machines utilize a fuel solenoid valve located on
the fuel pump to control the flow of fuel to the combus-
tion chamber. This solenoid valve, which is normally
closed, is activated by a flow switch when water is flow-
ing through it. When an operator releases the trigger on
the spray gun, the flow of water through the flow switch
stops, turning off the current to the fuel solenoid. The
solenoid then closes, shutting off the supply of fuel to
the combustion chamber. Controlling the flow of fuel in
this way allows for an instantaneous burn or no burn
situation, thereby eliminating high and low water tem-
peratures, and combustion smoke normally associated
with machines incorporating a spray gun.
CAUTION:
Periodic inspection is recommended to in-
sure that the fuel solenoid valve functions properly. This
can be done by operating the machine and checking to
see that when the trigger on the spray gun is in the off
position, the burner is not firing.
Electrode Setting:
(See illustration below.)
Burner Nozzle:
Keep the tip free of surface deposits by wiping it with a
clean, solvent-saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Air Adjustment:
Machines are preset and performance tested at the fac-
tory - elevation 100 feet. A one-time initial correction for
your location will pay off in economy, performance and
extended service life. If a smoking or eye-burning ex-
haust is being emitted from the stack, two things should
be checked. First, check the fuel to be certain that kero-
sene or No. 1 home heating fuel is being used. Next,
check the air adjustment on the burner.
Initial Air Adjustments:
Allow sufficient air to obtain a clean burning flame by
loosening the lock screws and moving the air shutter
and if necessary the bulk air band.
Reduce the air supply until the flame tips appear slightly
smoky then increase the air just enough to cause the
flame tips to appear absolutely clean.
Periodically check wiring connections. If necessary to
adjust electrodes, use diagram.
Air Band
Adjustment
Bolt
Air Band
Pressure
Gauge Port
Pressure
Adjustment
Screw
Return
Line
Fuel
Pump
5/32"
Electrodes
Nozzle Adapter
1/4"
1/2"
5/32"
2-7/8"
5/32" Gap
Top View
Side View
In Line Filter
Summary of Contents for MVC3-30321
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