CB
Built Like A Tank With Laser Precision
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21
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V. Maintenance
A. Cleaning Ash, Catalytic Converter, Heat Exchanger Tubes
Moisture combined with ash will eat through a boiler in short order and ash corrosion is NOT
covered under warranty.
Perform the following when there are enough coals to build another fire, but not so many that the fire
will burn out of control. Make sure to turn off power to the blower before opening doors and wear heavy
gloves and safety glasses as metal, firebrick and ashes will be hot. Clean ashes out from the firebox
frequently to prevent damage from corrosion. Use care to not dump ash into refractory channels.
Inspect refractory channels periodically and clean as needed. Remove rear refractory cover and inspect
(USE CARE!) catalytic converter and heat exchanger tubes once a month and clean as needed with a
soft brush and 3” chimney sweep. Close doors securely once cleaned as free-flowing air will cause fire
to burn too hot.
B. Creosote - Formation and Need for Removal
1. When wood is burned slowly (smoldering) it produces tar and other organic vapors which combine with
expelled moisture to form creosote. This occurs on a larger scale when there is too much moisture
content in the wood being used or during milder weather. The creosote vapors condense in the cooler
chimney flue of a slow-burning fire. As a result, creosote residue accumulates on the flue lining. Smaller
intense fires, shorter idle times & dry, seasoned wood will help limit this. When ignited, this creosote
makes an extremely hot fire. If a chimney fire occurs, shut down the blower. Do not spray water to keep
the steel cool as this will damage the boiler, simply keep the water jacket full.
2. The chimney and any connectors must be inspected frequently (at least twice a month) 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.
3. All creosote and ash must be cleaned from the firebox frequently as ash mixed with moisture is very
corrosive and will shorten the life of your boiler if not maintained properly. Check daily until experience
shows how often cleaning is necessary.
C. Door Seals
Check rope seals on the loading and refractory channel door periodically during the heating season as
they will compress. Loosen the bolts on the hinge and/or latch to re-position the main door for
tightening the seal if necessary. If the latch has no remaining adjustment, add washers behind the door
handle to further tighten the latch side. If there is no more adjustment available and the door is not
sealing properly, the rope seal must be removed, cleaned & loosened up, reversed and re-installed with
a liberal amount of high temperature caulk behind it, or new rope installed. Re-position the door as far
out as possible for maximum adjustment, slightly close door to custom fit to jamb then release and once
caulk behind rope is fully cured (1
st
ensure there are no raised portions that will leave gaps!), re-adjust
door to properly seal. Contact your dealer or Nature’s Comfort for new rope or caulk if needed. This is a
normal maintenance item and not a warranty issue.
D. End of Season
1. Power:
Turn off power supply at the appropriate circuit breaker.
2. Chimney:
Inspect & clean. Remove chimney and cap exhaust to keep rain water out.
3. Firebox:
Remove ashes, soot, and hardened deposits from the fire box using a putty
knife and/or wire brush. Coat inside of firebox with a light coat of motor oil or
WD-40 to protect steel during the off-season.
4. Refractory Channels:
Brush clean, vacuum or sweep out ash.
5. Catalytic Converter:
Clean with soft brush. USE CARE! Do not crack or scratch.
5. Heat Exchanger Tubes:
Clean with 3” chimney sweep.
5. Doors:
Oil door hinges and latch.
6. Plumbing:
Ensure fittings throughout installation are tight at all locations.
7. Water Treatment:
Unless using anti-freeze or glycol, have water tested to ensure enough
Nature’s Comfort water treatment is present so there will be no rust or
corrosion. See warranty for further details.