96-61836 • LANDA MVC • REV. 11/04
OPERA
T
OR’S MANU
AL
PRESSURE W
ASHER
12
MAINTENANCE & SERVICE
Rupture Disk:
If pressure from pump or thermal expansion should
exceed 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 com-
bustion 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 sole-
noid. 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
temperatures, and combustion smoke normally asso-
ciated 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
factory - elevation 100 feet. A one-time initial correc-
tion for your location will pay off in economy, perfor-
mance and extended service life. If a smoking or eye-
burning exhaust is being emitted from the stack, two
things should be checked. First, check the fuel to be
certain that kerosene 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.
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the adjusting screw clock-
wise to increase, counterclockwise to decrease. Do not
exceed 200 psi. NOTE: When changing the fuel pump,
a bypass plug must be installed in the return port or
the fuel pump will not prime.
Removal of Soot and Heating Coil:
In the heating process, fuel residue in the form of soot
deposits may develop on the heating coil and block air
flow which will affect burner combustion. When soot
has been detected on visual observation, the soot on
the coil must be washed off after following the coil re-
moval steps.
Periodically check wiring connections. If necessary to
adjust electrodes, use diagram.
5/32"
Electrodes
Nozzle Adapter
1/4"
1/2"
5/32"
2-7/8"
5/32" Gap
Top View
Side View
Lock
Screws
Air Shutter
Pressure
Gauge Port
Return
Line
Fuel Pump
In Line Filter
Pressure
Adjustment
Screw
Bulk Air
Band
To Order Parts Call 1-888-702-5326 - https://monsterfloorequipmentparts.com
