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Section 3 - Routine Maintenance
3-1. Water Level
Open the sight gauge valve. The sight gauge tube will
ll to indicate the level of water in the outdoor furnace.
Be sure to close the sight gauge valve after checking
water level. The sight gauge valve and tube will drain
when the valve is closed.
3-2. Vent Cap
Check that the vent cap ts loosely on the vent opening.
WARNING
Vent cap must t loosely on the vent opening
(Fig. 1). Do not force the cap down or try to seal it
tightly onto the vent pipe. Do not extend or restrict
the vent pipe or opening. DO NOT ALLOW THE
OUTDOOR FURNACE TO BE PRESSURIZED.
3-3. Ashtrol
Add Ashtrol to the rebox. Use a spoon as directed
to broadcast the powder in the rebox, alternating the
location. For example, broadcast on the re or hot coals
one day and then on the walls the next day. Ashtrol is a
pH modier that helps to neutralize acids that may form
in the rebox.
3-4. Stir Ash
Stir the ashes in the rebox and pull them forward
to prevent the ashes from sealing in moisture on the
bottom and along the edges. It is especially important to
scrape the walls and the four corners at the ash line and
below. If this maintenance operation is not performed
as directed, deterioration can result from the moisture
trapped between the ashes and the steel.
1. Remove any heavy or solidied ashes. When ashes
build up to either the door frame in the front or
the top of the beveled ash pan of the rebox, they
should be removed. A hoe, ash rake and shovel for
this procedure may be purchased from your Central
Boiler dealer. Leave enough ashes and coals to
relight the re.
CAUTION
Always wear the appropriate personal protective
gear when cleaning ashes from the rebox.
2. Disposal of ashes - Place ashes in a metal container
with a tight-tting metal lid. It can take many days
before the ashes are completely cooled. Other waste
should not be placed in this container.
3. Each time the ashes are cleaned out, inspect the
door rope (see Section 3-5) to make sure it is sealing
properly.
WARNING
When cleaning the outdoor furnace, be careful not
to spill any hot ash outside of the noncombustible
container.
3-5. Firebox Door Seal
The rebox door rope must be in good condition to
ensure an airtight seal. Look for wear spots or portions
of the door rope lacking an indentation from the rebox
door. The door rope should have a uniform indentation
in it all the way around.
1. Open the rebox door. One way to check that the
door rope is sealing all the way around the rebox
door is to insert a piece of paper similar in size and
shape to a dollar bill in several locations around the
perimeter of the door and then to close and latch the
rebox door.
2. At each location, pull on the piece of paper. If it pulls
out easily, either the door rope is sealing improperly
and needs to be replaced, or the rebox door needs
to be adjusted.
3. Check that the damper is properly sealing when
closed. Normal wear over time can create a groove
or dent where the damper lid strikes the casting
when closing. Replace the damper if it is not sealing
properly.
4. Inspect the door casting and heat shields. If the door
casting is not cracked through or broken, allowing
air to leak in, the door casting should not need to
be replaced. Like the damper, it is normal for heat
shields to show wear over time. The heat shield
should be replaced if it is no longer providing
coverage of the casting beneath the heat shield.
NOTE: If the outdoor furnace has been improperly
operated with the door partially open, close the
door and allow the outdoor furnace to cycle
normally for 1 hour before inspecting the door
for proper sealing.
3-6. Chimney
NOTE: Creosote is an accumulation of combustion
by-products on the surfaces of wood-burning
appliances. Twice a month during the heating
season, inspect for excessive creosote buildup
on the rebox walls, ue and chimney. If present,
the buildup should be removed for proper
operation and re safety. Creosote, if ignited in
the chimney, results in an extremely hot chimney
re. In case of a chimney re, close the rebox
door.
1. If the ue passageway behind the bafe becomes
plugged, it must be cleaned.
2. Inspect the chimney for excessive buildup of
creosote and clean, if necessary.
3. On 4030 models only, inspect the chimney restrictor
for excessive buildup of creosote and clean, if
necessary. Make sure the chimney restrictor is
positioned 11" in from the end of the chimney tee as
shown in Fig. 39.
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