Unloader Valves - Landa PGHW4-3000 Operator's Manual

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 equipment
clean and dry.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
The area around the Landa washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.

Unloader Valves

WARNING: 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 manufacturers
warranty.
AVERTISSEMENT: La soupape de décompression
sur cette laveuse à pression a été réglée en usine,
puis scellée, et est une pièce non réglable. L'altéra-
tion du paramètre de l'usine pourrait causer des
lésions corporelles et/ou des dommages à la
propriété, et annulera la garantie du fabricant.
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 anti-freeze
and water in the float tank. Turn the engine on to siphon
the anti-freeze mixture through the machine. If
compressed air is available, an air fitting can be
screwed into the float tank by removing the float tank
strainer and fitting. Then inject the compressed air.
Water will be blown out of the machine when the trigger
on the spray gun is opened.
High Limit Hot Water Thermostat
For safety, each machine is equipped with a tempera-
ture sensitive high limit control switch. In the event that
the water should exceed its operating temperature, the
high limit control will turn the burner off until the water
cools then automatically reset itself. The thermostat
sensor is located on the discharge side of the heating
coil. The thermostat control dial is located on the
control panel.
Landa PGHW Operator's Manual 8.916-485.0 - BW
Pumps
Use only SAE 10W-40 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, 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 heating coil. This growth is increased
by the extreme heat build up in the coil. The best
preventative 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.
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 disk ruptures it will need to be
replaced.he Rupture Disk should be replaced every
two years.
Maintenance
15