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6. Using a level ensure that the barometric damper pivot is level and that the weight is located appropriate
to the flue pipe orientation and is lined up with the 4 on the sliding scale. If your barometric damper
does not have a value on the scale you must use a draft gauge to adjust the weight for proper draft.
7. Verify the 8 fire bricks are properly placed so as to surround the feeder.
8. Verify that the chimney has been inspected by a professional and is clean and free of damage.
9. Drill a 5/16" hole in the base near the bracket that holds the oil gun and verify that the Dwyer Air Meter
460 is installed so that is is monitoring the draft in the base at all times, a piece of wire can be used to
hang it so that it hangs plumb/level.
10. Turn on the boiler and verify there is power to the L7224 Triple Aquastat and that the coal feed adjuster
is backed all the way off to prevent coal from being fed before it is needed.
11. Familiarize yourself with the menus and settings on the L7224 Triple Aquastat by going through each
to see how the display responds to input.
12. Place the fire stop ring on the grate and fill the hopper with coal after all familiarization activities are
complete.
Lighting the Boiler for Coal Operation
1. Two of the fire bricks can be removed or remove the access cover on the front of the boiler for lighting,
to accomplish this remove the four 9/16" brass nuts and pull the cover straight out. If the over is not
removed, two of the fire brick can be moved during the initial lighting and fire adjustment phase and
replaced when complete.
2. Verify the fire starter ring is in place if there is no ash on the grate from a previous fire, verify there is
sufficient coal in the hopper. If the unit has been fired before push some fresh coal down to leave just 2"
of ash by manually pushing the adjustment screw in and out which will move the feeder carpet. Place a
fire starter bag on the grate and move the coal aside so it contacts the air holes, cover it partially with
coal.
3. If boiler is vented by a power vent, switch the unit on and adjust the rheostat until the barometric damper
is opening slightly.
4. Verify boiler power is on at the switch and that the coal oil switch is placed in the "Coal" position.
5. Adjust feed screw to all the way out (minimum coal feed). Light the starter bag and push the cover
straight back over the studs, leave the nuts off, after four minutes, if there is exposed starter bag visible
throw a handful of coal onto the flames using a small steel shovel.
NOTE: DURING THIS PHASE IT WILL BE NECESSARY TO RUN AT LEAST ONE ZONE TO TAKE THE HEAT BEING
GENERATED, THE BOILER WILL COME UP TO 180*F WITHIN 20 MINUTES WITH NO LOAD.
6. After ash is visible at the end of the grate remove the starter ring by knocking it into the ash pan with the
shovel (when the ash bucket is emptied, remember to remove the fire stop ring for future use).
7. When the middle of the fire is looking dull it is time to start adjusting the feed rate for max burn by
screwing in the feeder adjustment screw in a clockwise direction. When there is around ½" of ash at the
end of the fire, allow the boiler to run at this feed rate for at least a half hour to verify the setting, mark
the feed adjustment screw with a permanent marker for future reference.
8. Allow the boiler to run with the burner circuit disabled for at least an hour and adjust the asymmetrical
timer and rheostats to obtain a 1/2" fire all the way across the grate. Verify the setting by allowing the
boiler to run at least ½ hour after the last adjustment. Refer to the idle circuit detail on the next page for
more information.
9. Remove power from the boiler and re-install the burner circuit wire inside the L7224 triple aquastat and
take note of the timer and rheostat settings, retain information for later use.
DANGER - Risk of Fire or Explosion - Do not burn garbage, gasoline, drain oil or other flammable liquids.
CAUTION – HOT SURFACES – KEEP CHILDREN AWAY – DO NOT TOUCH APPLIANCE DURING OPERATION
DO NOT CONNECT THIS UNIT TO A CHIMNEY SERVING ANOTHER APPLIANCE
WARNING –
RISK OF FIRE – DO NOT OPERATE WITH A FLUE DRAFT EXCEEDING -.07" wc,
OPERATING AT A DRAFT ABOVE -.07" wc CAN CAUSE UNIT TO BURN BACK INTO THE HOPPER
DO NOT OPERATE WITH ASH REMOVAL DOOR OPEN
DO NOT STORE FUEL OR OTHER COMBUSTIBLE MATERIAL WITHIN MARKED INSTALLATION CLEARANCES
CAUTION – BURN RICE OR BUCKWHEAT SIZED ANTHRACITE COAL ONLY
PLEASE SAVE THESE INSTRUCTIONS
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