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How The Furnace Functions
PARALLEL INSTALLATION: The design is
such that when the blower comes on, the blower
will only come on when the temperature in the
plenum has reached the setting on the blower
control. This is to insure that there is sufficient
warm air in the system to make it efficient for the
unit to operate. When the central system ther-
mostat calls for heat, the central system will
operate by the burner igniting and the blower
coming on. It is possible that both systems will
operate simultaneously. It is recommended
that for the most efficient use of your Supple-
mental Furnace, that it be fired as much as
possible in order to reduce the demand on your
existing central heating system.
The Warm air supply outlet of the Supple-
mentary Furnace shall not be connected to the
cold air return inlet of the central furnace be-
cause the possibility exists of components of
the central furnace overheating and causing the
central furnace to operate other than is intended.
CENTRAL FURNACE INSTALLATION: As a
central furnace, the unit functions independently
of any other system. The blower will come on
when the plenum temperature reaches the set-
ting on the blower control.
Your Model 1303 Furnace is designed to
be a supplemental or central heating source for
your home. This solid fuel furnace may be
installed in conjunction with a properly operat-
ing central furnace that is listed or certified in
accordance with nationally recognized safety
standards and equipped with the required con-
trols and other safety features and which has
been installed in accordance with appropriate
standards of the National Fire Protection Asso-
ciation with installation clearances specified in
the furnace nameplate marking. The installa-
tion must be accomplished by a qualified agency
(one who is engaged in, and is responsible for,
or is thoroughly familiar with the installation and
operation of the gas, oil, and solid fuel burning
heating appliances, who is experienced in such
work, familiar with all precautions required, and
has complied with all the requirements of the
authority having jurisdiction.) The installation
shall be in strict accordance with the
manufacturer's installation instructions furnished
with the solid fuel furnace.
The chimney connector of the furnace is
to be installed to provide clearances to combus-
tible material not less than specified in the
individual classifications and marked on the
furnace. The chimney connector must be con-
nected to a chimney suitable for use with resi-
dential type or building heating appliances which
burn solid fuel.
The Model 1303 Furnace is designed to
operate in a parallel air flow arrangement with
an existing central furnace or as a central fur-
nace. The furnace is designed to operate in
either of the following installations:
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