Maintenance - Landa MVC4-3000 Operator's Manual

PREVENTATIVE MAINTENANCE
1. Check to see that the water pump is properly lubri-
cated.
2. Follow winterizing procedures to prevent freeze
damage to the pump and coils.
3. Always neutralize and flush detergent from sys-
tem 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 system.
6. Always use high grade quality Landa cleaning prod-
ucts.
7. Never run pump dry for extended periods of time.
8. Use clean fuel-kerosene, No. 1 fuel oil or diesel.
Replace fuel filter every 100 hours of operation.
Avoid water contaminated fuel as it will seize up
the fuel pump.
9. If machine is operated with smoking or eye burn-
ing exhaust, coils will soot up, not letting water
reach maximum operating temperature. (See sec-
tion on Air Adjustments.)
10. Never allow water to be sprayed on or near engine
or burner assembly or any electrical component.
11. Periodically delime coils as per instructions.
12. Check to see that engine is properly lubricated.
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 equip-
ment 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.
MAINTENANCE AND SERVICE
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.
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 outdoors
under freezing conditions.

MAINTENANCE

During winter months, when temperatures drop below
32°F, protecting your machine against freezing is nec-
essary. Store the machine in a heated room. If this is
not possible then mix a 50/50 solution of anti-freeze/
water into a 5 gallon bucket. Place a short section of
garden hose into the bucket and connect it to the ma-
chine. Elevate the bucket and turn the pump on to si-
phon the anti-freeze through the machine. If com-
pressed air is available, an air fitting can be screwed
into the inlet connector and, by injecting compressed
air, all water will be blown out of the system.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event that 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 30W non-detergent oil. Change oil after
the first 50 hours of use. Thereafter, change the oil ev-
ery three months or at 500 hour intervals. Oil level
should be checked by using the dipstick found on top
of the pump or the red dot visible through the oil gauge
window. Oil should be maintained at that level.
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-
vention for liming conditions is to use high quality clean-
ing detergents. In areas where alkaline water is an ex-
treme problem, periodic use of Landa Deliming Pow-
der (part #9-028008) will remove lime and other de-
posits before coil becomes plugged. (See Deliming In-
structions for use of Landa Deliming Powder.)
Deliming Coils:
Periodic flushing of coils is recommended.
1. Fill a container or optional float tank with 4 gallons
of water, then add 1 lb. of deliming powder. Mix
thoroughly.
2. Remove wand assembly from spray gun and put
spray gun into container. Secure the trigger on the
spray gun into the open position.
3. Attach a short section (3-5 ft.) of garden hose to
machine to siphon solution from an elevated con-
tainer. Turn pump switch on, allowing solution to
be pumped through coils back into the container.
Solution should be allowed to circulate 2-4 hours.
4. After circulating solution flush entire system with
fresh water. Reinstall wand assembly to spray gun.
96-61836 • LANDA MVC • REV. 11/04
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