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WOODMASTER OUTDOOR FURNACES • OWNER'S MANUAL
M-4. Creosote - Formation and Need for Removal
When wood is burned slowly, it produces tar and other organic vapors,
which combine with expelled moisture to form creosote. The creosote
vapors condense in the relatively cool chimney flue of a slow-burning fire.
As a result, creosote residue accumulates on the flue lining. When ignited,
this creosote makes an extremely hot fire. The chimney connector and
chimney should be inspected at least twice monthly during the heating
season to determine if a creosote buildup has occurred. If creosote has
accumulated it should be removed to reduce the risk of a chimney fire.
M-5. Chimney, Chimney Cap and Seals
Inspect all silicone caulking and make sure it has a good seal between the
chimney and the roof so moisture can’t enter furnace. Also inspect silicone
seal for the vent pipe and hanger strap. If you have an ash auger, remove
it, clean out all ashes and scrape excess creosote from the fire chamber
surface. Reinstall the ash auger. Moisture combined with ashes will eat
through metal in a very short time.
CAUTION
Corrosion in the firebox is not a workmanship defect. Warranty does not cover
firebox corrosion! Neglecting to clean your furnace or cover the chimney when
not in use, will void your warranty . When the furnace is in use, be sure that you
maintain a good ash rotation . This should be done weekly .
If you are using a spark arrester or a chimney cap, you will need to provide
your furnace with a little more maintenance. It is very important that you
keep these areas free of any creosote build up at all times. Failure to do this
will cause harm to the roof of your furnace.
CAUTION
Use of a spark arrestor or chimney cap will require extra care and maintenance . If
you don't maintain it properly, it may cause damage to your roof .
M-6. Post Heating Season Maintenance
The water should be left in the outdoor furnace if the outdoor furnace is
not being used for an extended period of time. Protect your fire chamber by
placing the chimney cap over the chimney during the off-season.
1. Refer to the Preventive Maintenance Schedule for a list of operations to
perform.
2. Shut off the power supply to the outdoor furnace.
3. Place a cover over the chimney to keep rain from entering the outdoor
furnace. Clean and oil the chimney flue to the firebox.