H I G H P R E S S U R E P O R T A B L E F O R C E D A I R H E A T E R S E R V I C E M A N U A L
9
Fuel Filters
The fuel filtering system has two filters. The
first filter is a 50-mesh screen type. It is
located in the fuel tank below the grommet
where fuel suction and return lines enter the
tank. The filter is connected to both the fuel
input (suction side) and the return line from
the fuel pump. This unique design allows the
filter to backflush or clean itself of sediment
by the action of the excess flow returning
from the pump.
The second filter is a canister type. The two-
piece canister contains a replaceable drop-in
filter element. This filter will filter out very small
particles which may be present in the fuel
system. This high degree of filtering is needed
to prevent any sediment or foreign material
from reaching the nozzle. Make sure to clean
or replace this filter element every 250 hours of
operation. Clean or replace this filter more
often if fuel quality is bad.
Nozzle
The nozzle could be classified as the heart of
the fuel system. The nozzle works similar to a
standard garden hose nozzle. The kerosene
passes through the nozzle. Under pressure,
the oil expands through the nozzle orifice and
breaks into a fine spray. The flow rate and the
spray angle is designed into each nozzle. Do
not substitute with a nozzle having a different
flow rate or spray pattern. Use only replace-
ment parts supplied by DESA International.
Figure 3 - Canister Type Fuel Filter
Figure 2 - Fuel Filter in Fuel Tank
Filter
Figure 4 - Nozzle
