Landa ECOS 7000 Operator's Manual page 25

Removal of Soot and Heating Coil
In the heating process, fuel residue in the form of soot
deposits may develop on the heating coil pipe 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
removal steps (See Coil Removal page 16).
Pressure Relief Valve
Each machine is equipped with a relief valve to relieve
pressure in the system when higher than normal operat-
ing pressures are encountered or if the unloader valve
should fail. Unusually high pressures come from an
object plugging the spray nozzle. If operating pressure
is found to be normal and the relief valve continues to
leak, repair or replace valve. CAUTION: This valve must
be opened each year to check operation.
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.
The ruptured disk needs to be inspected once or twice
a year for any obstructions.
Fuel
Use clean fuel oil/diesel 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 fuel 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.
Fuel Control System
This machine utilizes a fuel solenoid valve located on
the fuel pump to control the flow of fuel to the combus-
tion chamber. The solenoid, which is normally closed,
is activated by a flow switch when water flows through
it. When the operator releases the trigger on the spray
gun, the flow of water through the flow switch stops,
turning off the electrical current to the fuel solenoid.
The solenoid then closes, shutting off the supply of fuel
to the combustion chamber. Controlling the flow of fuel
MAINTENANCE & SERVICE
9.801-316.0 • Landa ECOS 7000 Operator Manual • Rev. 12/12
in this way gives 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, to insure that the fuel
solenoid valve functions properly, is recommended.
This can be done by operating the machine and check-
ing to see that the burner is not firing when the spray
gun is in the off position.
Fuel Pressure Adjustment
To control water temperature, adjust fuel pressure
by turning the regulating pressure adjusting screw
clockwise to increase, counterclockwise to decrease.
Do not exceed 200 psi. NOTE: When changing fuel
pump, a bypass plug must be installed in return port
or fuel pump will not prime.
ELECTRODE SETTING
5/32" Gap
7/16"
1/16"
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.
Electrode
Nozzle
25