Maintenance; Monitoring Stove Temperatures; Creosote Formation & Need For Removal; Gaskets - HearthStone Mansfield 8012 Owner's Manual

Monitoring Stove Temperatures

Monitor the stove temperatures with a stove
thermometer (available from your dealer) placed on
the top center stone of the stove. The thermometer
could read as high as 600 F (427 C) on high burn
and 300-400 F (149-240 C) on low burn.
Do not over-fire the stove. (refer to previous
section).
Creosote Formation & Need for
Removal
When wood is burned slowly, it produces tar and
other organic vapors, which combine with expelled
moisture to form creosote. These 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, which may
damage the chimney or even destroy the house.
To prevent the buildup of creosote:
1. Burn the stove with the primary air control fully
open for 30 minutes daily to burn out creosote
deposits from within the stove and the venting
system.
2. After reloading with wood, burn the stove with
the primary air control fully open for 20 to 30
minutes. This manner of operation ensures
early engagement of the secondary combustion
system which,
creosote buildup in the chimney.
The stovepipe connector and chimney should be
inspected at least monthly during the heating season
to determine if a creosote build-up has occurred. If
a creosote residue greater that 1/4" (6 mm) has
accumulated, it should be removed to reduce the
risk of a chimney fire.
If your glass is remaining dirty, your operating
temperatures are low, therefore there is a higher risk
of creosote buildup.
The venting system must be inspected at the stove
connection and at the chimney top. Cooler surfaces
tend to build creosote deposits quicker, so it is
important to check the chimney at the top (where it is
coolest) as well as from the bottom near the stove.
Accumulated creosote should be removed with a
cleaning brush specifically designed for the type of
chimney in use. A certified chimney sweep should

Maintenance

when engaged, minimizes
be used to perform this service. Contact your dealer
for the name of a certified chimney sweep in your
area (your dealer may be a certified sweep!).
It is also recommended that before each heating
season the entire
inspected, cleaned and repaired, if necessary.

Gaskets

Gasket material should normally be replaced every
two to three seasons, depending on stove use. If
the door seal is loose, a new gasket will assure a
tight seal and improved stove performance. Contact
your dealer for a gasket kit, which includes
instructions and gaskets for your stove.
The procedure for replacing gaskets on the glass is
reviewed on page 24.
To replace door gaskets, first remove the old
gaskets with a utility or putty knife. Clean all gasket
channels with a wire brush. Apply gasket cement to
the channels and push the new gasket into place
without stretching the gasket material.
should be shut immediately to fully press the gasket
into place and assure a positive seal.
We require the use of the following gaskets:
GLASS: 60" (152 mm) Length, 3/4" (19 mm) Wide,
Adhesive Backed Black Tape
DOOR: 60" (152 mm) Length, 3/8" (9 mm) Diameter,
Low Density Black Tube
ASH DOOR: 32" (81 mm) Length, 1/4" (6 mm)
Diameter, Low Density, Black Tube

Glass

Do not operate the stove with a broken door glass.
Do not abuse the front door by striking or slamming.
When necessary, the glass can be cleaned with low
alkaline content commercial stove glass cleaners,
which are available from your local dealer. Never
attempt to clean the glass while the fire is burning or
the glass is hot. Most deposits can be cleaned by
following the instructions provided with the cleaner.
To clean heavier deposits, open the door and lift it
straight up and off the stove with the hinge pins
remaining in the door (take care to save hinge pins
and washers for reuse). Lay the door face down on
a work bench or table.
glass and allow it to set for a few minutes. By laying
the door flat, it will allow the cleaner to penetrate
23
system be professionally
The door
Apply the cleaner to the