POSSIBLE CAUSE
The use of wet, frozen or unseasoned wood
The use of soft wood, particularly those of high resin con-
tent such as plywood or blandex with glue
Poor natural draft or an obstruction in the stove pipe or
chimney flue
Smoldering fire
Inadequate amount of oxygen supplied to the combustion
chamber
Low fire or flue gas temperatures
Un-insulated stove pipe or chimney flues, especially if
construction is exterior to the house
Air leaks in the stove pipe or chimney
Not getting heat in the home...
POSSIBLE CAUSE
Unit may be too small for your home; check specifications
chart
Improper insulation in home, allowing heat to escape
Improper hook up to furnace
Fan and limit control set too low
Excessive amounts of smoke coming out of loading
door when loading...
POSSIBLE CAUSE
Improper draft
Chimney cap too close to top of chimney
Too long of run of smoke pipe from Jack to chimney
Negative pressure in home
SOLUTION
If you have to use wet wood, make loads smaller and burn
them hotter.
Avoid using if possible.
Measure draft with gauge. Should be set at .03 Water
Column.
Smaller and hotter fires.
Check
page 21
of this manual for proper installation of
outside combustion air to the furnace room. The air that
goes out the chimney in the form of smoke must be
replaced with fresh outside air.
Smaller loads of wood and hotter fires. Stack temps
should maintain minimum of 300º.
Never use un-insulated pipes for chimneys. If installed on
the outside of the house, INSULATE!
Check chimney top to bottom.
SOLUTION
Replace with a larger unit. In colder weather your furnace
will turn on once a day, one tank of fuel oil will last for a
long time.
Re-insulate!
Check installation drawings and/or consult your heating
service provider.
Check settings; refer to operation on proper settings and
adjust accordingly. If needed to set higher, never exceed
180º on — 150º off.
SOLUTION
Measure draft with gauge. Should be set at .03 Water
Column. (SJ125 Only: Pull out damper handle when load-
ing.
Remove and discard chimney cap.
Relocate Jack closer to chimney.
Install outside combustion air to furnace room.
Excessive creosote build-up. A small reminder, whatever kind
of fuel you burn, there is some kind of residue build-up on the
furnace and chimney. Same with wood no matter how good
the conditions...
51
Summary of Contents for BIG BJ90
Page 11: ...3 1 2 4 5 6 7 8 9 Furnace Features SJ125...
Page 13: ...1 2 3 4 5 6 7 Furnace Features BJ90 13...
Page 46: ...SUPER JACK SJ125 Exploded Views Parts Lists 46...
Page 48: ...BIG JACK BJ90 Exploded Views Parts Lists 48...
Page 53: ...Notes...
Page 54: ...Notes Notes...
Page 55: ...Notes...
