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Manual 2100-422M
Page 25 of 42
SPACING OF ELECTRODES
The electrodes should be spaced 5/32" apart. They
should extend 1/16" beyond the end and 5/16" above the
center of the nozzle tip as shown in Figures 10A & 10B.
GUN ASSEMBLY ADJUSTMENT
The gun assembly can be adjusted in the slot inside of
fan housing by loosening screw holding slot cover in
position. Nozzle tip should ordinarily be located 1-1/8"
behind the front face of the cone.
REMOVING GUN ASSEMBLY
Disconnect the oil line at the fan housing and remove
lock nuts on copper tube fitting. Loosen igniter hold
down clamps, then swing igniter up and backward. Gun
assembly can now be removed through this opening.
COMBUSTION AIR REQUIREMENTS
This furnace must be installed in a location where a
sufficient supply of combustion air is available for the
complete combustion of the fuel oil. Keep in mind that a
certain amount of excess air is required as well to ensure
complete combustion of the fuel oil.
When structures are constructed too tightly to supply
sufficient combustion air, air from outside the structure
is required to be brought in directly to the furnace. This
furnace has been conveniently designed to accept a
combustion air boot which is attached directly to the
outdoors by means of a 4" pipe. This pipe can be rigid or
flexible, but it is recommended that a metallic material
be used. Refer to Figure 11. The air boot used for this
design is a Field Controls model number CAS-2B-90E
that can be purchased through your local distributor.
Follow all installation procedures as specified in the
instructions packaged with the air boot kit.
NOTE - This accessory is not currently available for
Bard Models: FH110D48F, FH110D60F,
FLF110D48F and FLF110D60F with NX burners.
FIGURE 10A
ELECTRODE ADJUSTMENTS — AFG BURNERS
FIGURE 10B
ELECTRODE ADJUSTMENTS — NX BURNERS