Maintenance
Please consult your local
LANDA
Dealer for the correct
procedures.
To Adjust:
Start machine and turn burner ON. Loosen
two locking screws found in the air shutter openings
(refer to illustration) and close air shutter until black
smoke appears from burner exhaust vent. Note air
band position. Next, slowly open the air shutter until
white smoke just starts to appear. Turn air shutter
halfway back to the black smoke position previously
noted. Tighten locking screws.
If the desired position cannot be obtained using only
the air shutter, lock the air shutter in as close a position
as can be obtained, the
Adjust to your operating location's environment as-
needed for best smoke spot and performance
compliant with local, state, and federal regulations.
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discontinue
use and readjust air bands.
ÚTTENTION: Si de la fumée blanche s'échappe de
l'évacuation du brûleur pendant le démarrage ou le
fonctionnement, cesser d'utiliser et réajuster les
bandes d'air.
PRECAUCIÓN: Si se presenta humo blanco del
escape del quemador durante el arranque u opera
-
cion, detenga la operacion y reajuste las bandas de
aire.
Initial Air Adjustments:
Allow sufficient air to obtain a
clean burning flame by loosening the lock screws and
moving the air shutter and if necessary the bulk air
band.
Reduce the air supply until the flame tips appear
slightly smoky, then increase the air just enough to
cause the flame tips to appear absolutely clean.
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. Follow these
steps to remove the coil.
1. Disconnect hose from pump/unloader to inlet side
of the coil.
2. Disconnect electrical connection to the thermostat
or remove thermostat sensor.
3. Remove all the fittings from inlet and discharge
side of coil.
4. Remove burner assembly from combustion
chamber.
5. Remove the 5/16” cap nuts from each side of coil
and coil cover assembly (these cap nuts are used
to fasten cover and coil to chassis).
6. Disconnect 1/2” pipe nipples from inlet and
discharge side of coil.
7. Remove top coil wrap exposing insulation and coil
and fold back insulation.
8. Remove bolts that hold down coil to bottom wrap.
9. Remove coil.
10. Replace or repair any insulation found to be torn or
broken.
Coil Reinstallation
Reinstall new or cleaned coil by reversing Steps 9
through 1 above.
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 Landa Dealer
for instructions.
Landa 2HOT Series Operator’s Manual -
9.808-353.0
- A
Air
Band
Fuel
Pump
Air Adjustment
Screw
Air Shutter
Locking Screws
18
