8.913-939.0 • LANDA VNG • Rev. 5/11
15
PRESSURE WASHER
OPERATOR’S MANUAL
MAINTENANCE
PREVENTATIVE
MAINTENANCE
1. Check to see that water pump is properly
lubricated.
2. Follow Winterizing Procedures to prevent freeze
damage to the pump and coils.
3. Always neutralize and flush detergent from system
after use.
4. If water is known to be high in mineral content, use
a water softener in your water system or de-scale
as needed.
5. Do not allow acidic, caustic or abrasive fluids to be
pumped through the system.
6. Always use high grade quality Landa cleaning
products.
7. Never run pump dry for extended periods of time.
Shut off timer will be set for two minutes.
8. Periodically delime coils per instructions.
It is advisable, periodically, to visually inspect the
burner. Check air inlet to make sure it is not clogged
or blocked. Wipe off any oil spills and keep this
equipment clean and dry.
The areas around the Landa washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
Note: Pump damage may occur if ran in bypass longer
than two minutes.
MAINTENANCE AND SERVICE
Spray Nozzles
Each machine is equipped with one or more spray
nozzles, depending on model. Different 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.
Unloader Valves:
Unloader valves are preset and tested at the factory
before shipping. Occasional adjustment of the unloader
may be necessary to maintain correct pressure.
Call your Local Dealer for Assistance. Tampering with
the factory setting may cause personal injury and
or property damage, and will void the manufacturer's
warranty.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever the washer must be stored or operated under
freezing conditions.
During winter months, when temperatures drop below
32°F, protecting your machine against freezing is nec-
essary. Siphoning a small amount of antifreeze into the
system is recommended. This is done by pouring a
50:50 mix of antifreeze and water into the float tank and
then siphoning 100% antifreeze through the detergent
line with the pump on. If compressed air is available,
an air fitting can be screwed into the float tank strainer
fitting and by injecting compressed air, all water will be
blown out of the system. The use of a draft diverter will
prevent the wind chill factor from freezing the coil.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature, the high limit
control will turn the burner off until the water cools.
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should
be checked through use of the dipstick found on the
top of the pump or by the red dot visible through the oil
gauge window. Oil should be maintained at that level.
HEATING COIL
Condensation from Heating Coil
When cold water is being pumped into the water heater
coil, and the burner is on, condensation will form on
the coil and drip down into the burner compartment,
giving the appearance of a leaking coil, particularly on
cold humid days.
To Check Water Heater Coil for Leaks:
With the main burner “OFF” start machine and allow it
to run a few minutes. Look into the burner compartment
with a drop light or flashlight. If no leaks are visible, then
water dripping from coil is from condensation.
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