Marantz FP-38 User Manual
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
CREOSOTE FORMATION AND REMOVAL
When wood is burned slowly, it produces tar
and other organic vapors, which combine with
expelled moisture to form creosote. The creo-
sote vapors condense in the relatively cool
chimney flue of a slow-burning fire. As a result,
creosote residue accumulates on the flue lin-
ing. When ignited, this creosote makes an
extremely hot fire.
The chimney should be inspected at least twice
yearly during the heating season to determine
if a creosote build-up has occurred.
If creosote has accumulated, it should be re-
moved to reduce the risk of a chimney fire.
If creosote build-up is found, do not use chemi-
cal chimney cleaners that are poured on a hot
fire. The chemical cleaners can be dangerous
and generally only work on the flue section
nearest the fire, leaving the rest of the flue
unaffected. It is best to take the time to clean the
flue as previously described or have the chim-
ney professionally cleaned by a qualified
No Smoking Allowed
Your new fireplace is designed not to smoke if
properly installed and operated per our instruc-
tions. If you do experience a problem, here are
several things to check:
1. Remember – always check to ensure your
flue damper is in the open position before
lighting a fire!
WARNING: CONTINUED OVERFIRING
CAN PERMANENTLY DAMAGE YOUR
FIREPLACE SYSTEM. SOME EXAMPLES
OF OVERFIRING ARE:
• BURNING QUANTITIES OF SCRAP
LUMBER, PINE BRANCHES, PAPER OR
CARDBOARD BOXES WHICH EXCEED
THE VOLUME OF THE NORMAL LOG FIRE.
• USE OF ARTIFICIAL WAX BASE LOGS,
TRASH OR OTHER CHEMICALS OR
CHEMICALLY TREATED COMBUS-
Proper care and “burn-in” of the firebox will
prolong the period of enjoyment without ex-
tensive maintenance. For the first few uses,
build small fires – not roaring infernos. The
materials used in the refractories contain and
absorb moisture. It is important to “cure” the
refractories by building only modest fires.
Under normal usage, it is expected that hair-
line cracks will appear in the refractory surface.
These hairline cracks do not affect the safe
operation of the fireplace.
Your fireplace is designed to operate trouble-
free with minimum maintenance. However, like
any fine appliance, it deserves and requires
some housekeeping attention.
Your fireplace will perform better – and cer-
tainly look more attractive to family and friends
– if it is cleaned before each use. Before the first
seasonal use in Autumn and after the last fire in
Spring, it is important to inspect the fireplace
system carefully. We recommend at least two
complete fireplace inspections a year.
Before Each Use
1. Clean the firebox of excessive ashes. Some
owners prefer to leave a small layer to insulate
the cold refractory below the grate which helps
This fireplace has a factory supplied grate at-
tached, it is permissible to remove the grate for
cleaning; however, the grate must be re-at-
tached to the fireplace before the next burn.
2. Keep the fireplace screens clean so combus-
tion air flows freely.
3. Spot check the brick-like refractory for small
cracks. Heat from the fire expands it slightly.
When it cools, it contracts.
Refractories should be replaced when:
1. The crack opens more than
¹⁄₄" (19 mm).
2. Pitting in the surface is extensive and pits
become deeper than
³⁄₁₆" (4.76 mm).
3. Any piece of refractory larger than 2" (51
mm) in radius and
³⁄₁₆" deep becomes dis-
If conditions 1, 2 or 3 occur, the refractory
should be replaced.
TWICE A YEAR CHECK-UP
Normally, twice a year, you should inspect
your fireplace following this list:
1. Inspect the opening in your chimney top
and remove any debris that could clog it. The
cap is usually held in place by four (4) screws,
which remove easily for checking or cleaning
the full length of the flue from above. Remove
the chimney top while wearing gloves to guard
against any sharp metal edges.
2. Inspect the entire flue from the top down for
obstructions such as birds nests, leaves, etc.
This may be done by using a flexible handled
chimney cleaning brush. If the chimney con-
tains offset/return elbows; a soft brush cleaning
from the top down to any elbow and then from
the firebox up to the offset/return section is the
proper method. The beam from a powerful
flashlight will help in this inspection.
3. Look up from inside the fireplace (damper
open) to see any obstructions in the lower flue
area. If present, shut the damper and glass
doors (if installed) to seal the firebox and
contain any soot that might fall.
If your do not have glass doors installed, a
damp sheet covering the fireplace opening and
sealed with masking tape will do. Then clean
the flue from the top down (if an offset system,
clean per Step 2) using a proper size chimney
brush with flexible pole sections. Don’t open
the doors or remove the sheet until all soot has
settled. Vacuum, don’t sweep.
4. Check the metal flashing and seals around
your chimney. Seal any cracks or loose nail-
head openings to prevent roof leaks.
5. Clean the firebox thoroughly by using a soft
brush or equivalent.