15
Maintenance
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 relieve pressure in the line when a
spray gun is closed. Unloader valves are preset and
tested at the factory before shipping. 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
whenever the washer must be stored or operated
outdoors under freezing conditions.
During winter months, when temperatures drop below
32°F, protecting your machine against freezing is
necessary. Store the machine in a heated room. If this
is not possible then mix a 50/50 solution of antifreeze
and water into a 5 gallon bucket. Place a short section
of garden hose into the bucket and connect it to the
machine. Elevate the bucket and turn the pump on to
siphon the antifreeze through the machine. If
compressed 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 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 dipstick found on top of pump.
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 preventa-
tive 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 (Landa
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 Lander Dealer
for instructions.
Removal of Soot and Heating Coil
In the heating process, fuel residue in the form of soot
deposits may develop between 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).
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 the disk ruptures it will need to be replaced.
Fuel
Use clean fuel oil 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
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.
Landa MHP Operator’s Manual 8.913-925.0 - T