16
Maintenance
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 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 result in a serious explosion.
NEVER
use
crankcase or waste oil in your burner. Fuel unit
malfunction could result from contamination.
Biodiesel fuels are becoming more popular as alterna-
tive fuels under the Green Initiative. Landa endores the
use of fuels that are blended with biodiesels meeting
ASTM D6751 and petroleum fuels meeting ASTM
D396. Landa offers no opinion regarding the combus-
tion characteristics of B5 blends. B5 biodiesel fuels are
5% ASTM D6751 biodiesel and 95% ASTM D396 fuel
oil blend.
Electrode Setting: Wayne
(See Illustration)
Electrode Setting: Beckett
(See Illustration)
Ignition Circuit
Periodically inspect wires, spring contact and elec-
trodes for condition, security and proper spacing.
Transformer test:
(CAUTION 10,000 VOLTS)
use
defect free insulated 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 illus-
tration 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
unloader goes into a by-pass mode, thus stopping elec-
trical 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
Landa HOT Series Operator’s Manual 8.917-208.0 - B
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
