The SWI removes condensation, rust, bacteria,
algae and bottom sediment before it reaches the
filter. These “filters” do not get replaced. A service
technician simply removes a plug, opens a
valve and drains the unit until clean fuel passes
through.
Filter Locations
For inside tank installations, fuel filters can
be located at the tank, at the burner or at both
the tank and the burner.
Traditionally, it was common to install the
fuel filter at the tank to clean the fuel before it
got into the fuel line. As more
and more homeowners
finished basements
and “boxed in” tanks, it became
more common to install
the filter at the burner.
For outside installations
the fuel filter can be installed
where the lines enter the building or at the
burner.
Whatever location works for your company
and your customer is fine, as long as you have
a readily accessible filter in the suction line. It
should be in an area where it’s not likely to be
damaged or exposed to freezing temperatures.
30 National Oilheat Research Alliance
Filtration Maintenance
When replacing fuel filters, always follow
manufacturers’ instructions. If these instructions
are not available, then the following
procedures are recommended:
Spin-on filters — remove the filter, remove
the center O ring and replace it with a new one.
Remove the outside gasket, apply a thin coat
of petroleum jelly to both sides and carefully
replace it. Fill the cartridge with clean fuel and
spin it onto the filter head and tighten it ¾ of a
turn past snug.
Cartridge type filters — remove the old
cartridge, remove the gasket and the center
bolt gasket. Thoroughly wipe out the can with
a clean cloth, inspect the can for corrosion and
replace it if necessary. Install a new cartridge, a
new can gasket and a new gasket on the bolt.
NORA recommends that oil
filters NEVER be installed outside
the premises or in any area where
they will be subject to freezing
temperatures.