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22 31072 Rev G 08/04
MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
Note: Save and pass this instruction manual to subsequent home owners. The informa-
tion provided is intended to notify and warn them about making unsafe future modifica-
tions such as the addition of shelves or the use of unauthorized parts and repairs.
WARNING!
DO NOT operate this fireplace with the flue
damper in the closed position. Combustion
products must vent up the chimney system to
prevent carbon monoxide poisoning, and to
prevent hot combustion gases from contacting
and overheating combustible surfaces. Failure
to operate this fireplace with the damper in the
open position may result in asphyxiation or a
structure fire.
CAUTION:
Fireplace operation does require air. Do not take
air from other fuel burning appliances which can
result in improper venting (smoking) or air di-
lution. Always provide adequate makeup air.
G. OPERATING INSTRUCTIONS
1. General Information
This fireplace is intended to operate as a supplemental
heat source for a single room. It is not designed to
function as a primary heat source for a structure.
Fireplaces, as well as other woodburning appliances,
have been used safely for many years. It has been our
experience that most problems are caused by improper
installation and operation of the fireplace. Make certain
that installation and operation of the fireplace system
is in accordance with these instructions.
It is extremely important that the fire be supervised
whenever the fireplace is in use. It is also
recommended that an annual inspection be performed
on the fireplace system to determine if the flue system
needs to be cleaned, or as in the case of any appliance,
if minor repairs are required to maintain the system in
top operating condition.
This factory built fireplace is intended for use with either
solid fuel (firewood) or a decorative gas appliance that
has been tested and listed to the Standard for
Decorative Gas Appliances for Installation in
Vented Fireplaces, ANSI Z21.60. When operating
your fireplace, the flue damper must be in the open
position.
This fireplace was not tested and listed for use with an
unvented gas log heater. Do not install an unvented
gas log heater in this fireplace and operate it with the
flue damper in the closed position unless the unvented
gas log heater has been specifically tested and listed
for use in this fireplace by Underwriters Laboratories
Inc.
Use of an unvented gas log heater in this factory
built fireplace may create a fire hazard that can
result in a structure fire.
2. Outside Air
A source of air (oxygen) is required in order for
combustion to take place. Whatever air is consumed
by the fire must be replaced through cracks around
windows, under doors, etc. Most newly constructed
houses or existing homes fitted with tightly sealed doors
and windows are relatively air tight. In this case, an
outside air source must be made available to feed
combustion air from outside the home.
A damper control handle allows the individual control
of the outside air inlet if your fireplace is equipped with
this option. Use of outside air for combustion is highly
recommended to conserve heated air within the
structure and to provide make up air to keep the
fireplace venting properly.
This fireplace will operate correctly only if adequate
ventilation is provided to allow proper draft to the
fireplace system. Hearth & Home Technologies
assumes no responsibility for the improper
performance of the fireplace system caused by
inadequate draft due to environmental conditions, down
drafts, tight sealing construction of the structure, or
mechanical exhausting devices which create a
negative air pressure within the structure where the
fireplace is located.
3. Flue Damper
The flue damper must be in a full open position. Before
lighting the fire, verify this by looking up from the inside
of the fireplace. Always operate this fireplace with the
damper fully open. Pull the handle down to open and
push the handle up to close. Please note: down drafts,
obstructions, damaged or poor (wet) fuels can cause
smoke spillage.