Jack BIG BJ90, Owner'S Manual

Page: 38 / 56

STARTING A WOOD FIRE
1. Place several pieces of crumpled paper in the center of
your firebox. In a criss-cross pattern, place a couple hand-
fuls of dry kindling wood 3/4” thickness, then several small
dry pieces of firewood.
NEVER USE CHEMICALS OR FLUIDS SUCH AS
GASOLINE, CHARCOAL LIGHTER FLUID, DRAIN OIL OR
KEROSENE TO LIGHT A FIRE IN YOUR JACK FURNACE.
2. Ignite the paper and kindling with a match. Close the
door. Do not attempt to open door immediately after igniting
the fire. There could be a flame flash out.
Super Jack models only : Pull out pull handle before light-
ing fire. This opens the secondary heat exchanger damper.
3. Turn thermostat above room temperature. Draft inducer
motor will start. Make sure the Air Inlet disc on draft blower
is open. Adjustment can be made after fire is established.
4. It will take a few minutes for the fire to establish itself.
Once you have some burning embers, add larger pieces of
wood.
DO NOT ALLOW BURNING EMBERS ABOVE
THE TOP OF FIREBRICK.
5. Open manual draft spinner disc (on fire door) 3 - 4 turns.
This manual draft spinner disc controls the amount of sec-
ondary air allowed into the firing chamber. Shutting it off
tight will make for a slower burn but will allow creosote to
build up in furnace, smoke pipe and chimney. Leaving it
open will increase the efficiency of the burning wood by up
to 40% and reduce creosote buildup. The wood fire will not
last as long as secondary air, while burning the unburned
gases at the top of the flame, tends to burn the wood a little
faster.
6. After substantial fire has been established for at least 30
minutes, during installation set Barometric Draft Regulator
to .-03 using a Manometer.
7. When desired room temperature is reached, set thermo-
stat accordingly.
NOTE:
All chimneys act differently depending on chimney size,
chimney draft and the moisture content of the wood. You
may have to experiment with different levels of wood logs
until you are satisfied with the heat output.
USE CAUTION WHEN OPENING LOADING DOOR.
AVOID OPENING LOADING DOOR RAPIDLY. THIS COULD
CAUSE FLAME TO FLASH OUT DOOR. THIS OCCURS WHEN
THERE IS UNBURNED FUEL AND A LARGE AMOUNT OF
GASES ON TOP OF THE FIRE BOX. WHEN THE DOOR IS
OPENED, OXYGEN IS COMBINED WITH THE GASES AND
IGNITES.
PULL HANDLE OUT TO START FIRE
(SUPER JACK ONLY)
PUSH IN FOR MAXIMUM HEAT AFTER
FIRE IS WELL ESTABLISHED
(SUPER JACK ONLY)
MANUAL DRAFT
SPINNER DISC
NOTE: When your furnace is new, there may be a
small amount of oil on the metal - you may smell an
odor until the oil evaporates, which is usually a
minutes. After the first few firings, the odor disappears.
CAUTION
DO NOT LOAD WOOD ABOVE THE TOP OF
FIREBRICKS. DAMAGE TO THE FIREBOX
COULD RESULT.
Operating Instructions
38
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