Landa VHG, Руководство оператора

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Spray Nozzles
Each machine is equipped with one or more spray
nozzles, depending on the 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 relieve pressure in the line when a
spray gun is closed. Unloader valves are preset and
tested at the factory before shipping. Occasional
adjustment of the unloader may be necessary to
maintain correct pressure. For valve adjustment
contact your nearest dealer or call technical support.
Tampering with the factory setting may cause personal
injury and/or property damage, and will void the manu-
facturer's warranty.
Winterizing Procedure
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures
whenever the washer must be stored or operated
outdoors under freezing conditions.
It is necessary to protect your machine against freezing
when temperatures drop below 32° F. Siphoning a
small amount of antifreeze into the system is recom-
mended. This is done by pouring a 50-50 mix of anti-
freeze 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.
Low Pressure Diagnosis
(Machines with spray gun)
Refer to Troubleshooting Chart for low pressure. If the
trouble is found to be either the unloader or the pump,
your next step is to determine which is the problem.
This can be done by eliminating the unloader from the
system and attaching the 50' discharge hose directly to
the pump. If high pressure is developed in this manner,
the pump is good and the unloader needs to be
repaired or replaced. If low pressure is still present,
then the pump needs repairing.
CAUTION: When using this procedure to test
components keep the spray gun open at all times.
ATTENTION: Lorsque cette procédure est utilisée
pour tester les composants, garder le pistolet
pulvérisateur ouvert en tout temps.
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 10W-40 weight non-foaming oil. Change
oil after first 50 hours of use. Thereafter, change oil
every year 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 Coils
To Check Water Heater Coil for Leaks
With the main burners “OFF” start the pumping unit and
allow it to run for a few minutes. Check into the burner
compartment with a drop light or flashlight. If no leaks
are visible, then water dripping from coils is condensa-
tion from the flue gases when the burners are on.
Condensation from Heating Coil
When cold water is being pumped into the water heater
coils, and the burners are on, condensation will form on
the coils and drip down into the burner compartment,
giving the appearance of a leaking coil, particularly on
cold humid days.
Descaling 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 preven-
tion for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of Landa Coil Descaler (part #
8.914-296.0) will remove lime and other deposits
before coil becomes plugged. (
Periodic descaling of the heating coil is recom-
mended so please consult your local Landa Dealer
for instructions.
Landa VHG Operator’s Manual 8.913-952.0 - BR