10
HOT SERIES PRESSURE WASHER
OPERATOR’S MANUAL
LANDA HOT • 96-626 • REV. 2/04
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
the disk ruptures it will need to be replaced. Torque the
replacement rupture disk to 35 foot pounds.
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 could re-
sult in a serious explosion. NEVER use crankcase or
waste oil in your burner. Fuel unit malfunction could re-
sult from contamination.
Electrode Setting: Wayne
(See illustration below.)
Electrode Setting: Beckett
(See illustration below.)
Ignition Circuit
Periodically inspect wires, spring contact and electrodes
for condition, security and proper spacing. Transformer
test: (CAUTION 10,000 VOLTS) use defect free insu-
lated screwdriver and keep fingers off blade! Lay blade
across one contact: OK if arc will span 1/2" between end
of blade and other contact (see illustration below).
Transformer Check
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.
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, which is normally closed, is
activated by the unloader's pressure switch. When an
operator releases the trigger on the spray gun, the un-
loader goes into a by-pass mode, thus stopping electri-
cal current to the fuel solenoid coil. With the solenoid
closed, the fuel supply to the combustion chamber
ceases. Periodic inspection to insure that the fuel sole-
noid valve functions properly is recommended. This can
be done by operating the machine and checking to see
that when the spray gun is in the OFF position the burner
is not firing.
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the adjusting screw (located
at the regulator port) clockwise to increase, counterclock-
wise to decrease. Do not exceed 200 psi.
NOTE: When changing fuel pump, a by-pass plug must
be installed in return line port or fuel pump will not prime.
Gap
1/8"
1/8"
Electrodes
3/8"
1/2"
3/16"
Nozzle Adapter
Top View
Side View
Periodically check wiring connections. If it is necessary
to adjust electrodes, use diagram.
2-7/8"
Side View
Top View
1/16"
7/16"
5/32" Gap
Electrode
Nozzle