Landa SEHW6-3500, Руководство оператора

Страница: 17 / 38

LANDA SEHW • 8.913-932.0 • Rev. 02/12a
17
PRESSURE
W
ASHER
OPERA
TOR’S MANU
AL
MAINTENANCE & SERVICE
CAUTION: Periodic inspection is recommended to
insure that the fuel solenoid valve functions properly.
This can be done by operating the machine and check-
ing to see that when the trigger on the spray gun is in
the off position, the burner is not firing.
Fuel Pressure Adjustment:
To adjust fuel pressure, turn the pressure adjusting
screw clockwise to increase, counterclockwise to de-
crease. 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. (See illustration)
Air Adjustment:
The oil burner on this machine is preset for opera-
tion at altitudes below 1000 feet. If operated at higher
altitudes, it may be necessary to adjust the air band
setting. Adjust air band for a #1 or #2 smoke spot on
the Bacharach scale. A one-time initial correction for
your location will pay off in economy, performance,
and extended service life. If a smoky 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. An
oily, smoky fire indicates a lack of air and the air band
should be moved to allow the air to flow through the
burner. Sharp eye-burning fumes indicate too much air
flowing through the combustion chamber. The air band
should be readjusted to allow less air to flow through
the burner.
To adjust: start machine and turn burner ON. Loosen
two locking screws found in the air shutter openings
(refer to illustration on page 8) and close air shutter
until black smoke appears from burner exhaust vent.
Note air band position. Next, slowly open the air shutter
until white smoke just starts to appear. Turn air shutter
halfway back to the black smoke position previously
noted. Tighten locking screws.
If the desired position cannot be obtained using only
the air shutter, lock the air shutter in as close a position
as can be obtained, then repeat the above procedure
on the air band setting.
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.
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.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased
by the extreme heat build up in the coil. The best pre-
ventative for liming conditions is to use high quality
cleaning detergents. In areas where alkaline water is an
extreme problem, periodic use of Landa Deliming Pow-
der (Landa Part #9-028008) will remove lime and other
deposits before coil becomes plugged. (See Deliming
Instructions for use of Landa Deliming Powder.)
Deliming Coils:
Periodic flushing of coils is recommended.
Step 1 Fill the float tank with 4 gallons of water,
then add 1 lb. of deliming powder.
Mix thoroughly.
Step 2 Remove nozzle from the wand assembly
and put the wand and spray gun into float
tank. Attach a nylon stocking to the end of
the wand to collect debris.
Step 3 Turn pump switch on, allowing solution to be
pumped through coils and back into the float
tank. Solution should be allowed to circulate
2 - 4 hours.
Step 4 After circulating solution, clean and drain
float tank and flush entire system with fresh
water. Replace nozzle in wand.
Spray Nozzles:
Each machine is equipped with one spray nozzle. Dif-
ferent spray nozzles are calibrated for each machine
depending on the flow and pressure of that particular
model. Spray nozzles vary in bore size and angle of
spray. Popular spray angles are 0°, 15°, 25°, 40°. When
ordering, please specify size and angle of nozzle.
Nozzle size for each machine is located on the serial
plate.
AIR BAND
LOCKING SCREW
AIR SHUTTER
LOCKING SCREW
AIR SHUTTER
AIR BAND