Service Manual

18
SYSTEM OPERATION
Freeze Protection
If the drain trap and drain line will be exposed to tempera-
tures near or below freezing, adequate measures must be
taken to prevent condensate from freezing. NOTE: The use
of insulation and/or heat tape is recommended. Failure to
provide proper condensate drainage can result in property
damage.
Propane Gas and/or High Altitude Installations
WARNING
P
OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF
THE CORRECT CONVERSION KITS ARE NOT INSTALLED. THE APPROPRIATE KITS
MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. ALL
CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE
AGENCY.
This furnace is shipped from the factory configured for natu-
ral gas at standard altitude. Propane gas installations re-
quire an orifice change to compensate for the energy con-
tent difference between natural and propane gas.
High altitude installations may require both a pressure switch
and an orifice change. These changes are necessary to com-
pensate for the natural reduction in the density of both the
gas fuel and the combustion air at higher altitude.
Refer to the Accessories Charts in this manual or product
Specification Sheet for a tabular listing of appropriate
manufacturer’s kits for propane gas and/or high altitude in-
stallations. The indicated kits must be used to insure safe
and proper furnace operation. All conversions must be per-
formed by a qualified installer, or service agency.
VENT/FLUE PIPE AND COMBUSTION AIR PIPE
ONLY)
WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR
DEATH. CAREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS
SECTION.
WARNING
UPON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE
ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT
IS PROPERLY SEALED. LEAKS IN THE FLUE SYSTEM CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH DUE TO EXPOSURE TO FLUE PRODUCTS,
INCLUDING CARBON MONOXIDE.
A condensing gas furnace achieves its high level of efficiency
by extracting almost all of the heat from the products of
combustion and cooling them to the point where condensa-
tion takes place. Because of the relatively low flue gas tem-
perature and water condensation requirements, PVC pipe is
used as venting material.
This furnace must not be connected to Type B, BW, or L
vent or vent connector, and must not be vented into any
portion of a factory built or masonry chimney except when
used as a pathway for PVC as described later in this sec-
tion. Never common vent this appliance with another ap-
pliance or use a vent which is used by a solid fuel appli-
ance.
It is the responsibility of the installer to follow the manufac-
turers’ recommendations and to verify that all vent/flue pip-
ing and connectors are compatible with furnace flue prod-
ucts. Additionally, it is the responsibility of the installer to
ensure that all piping and connections possess adequate
structural integrity and support to prevent flue pipe separa-
tion, shifting, or sagging during furnace operation.
Materials and Joining Methods
WARNING
T
O AVOID BODILY INJURY, FIRE OR EXPLOSION, SOLVENT CEMENTS MUST BE
KEPT AWAY FROM ALL IGNITION SOURCES (I.E., SPARKS, OPEN FLAMES, AND
EXCESSIVE HEAT) AS THEY ARE COMBUSTIBLE LIQUIDS.
A
VOID BREATHING
CEMENT VAPORS OR CONTACT WITH SKIN AND/OR EYES.
Precautions should be taken to prevent condensate from
freezing inside the vent/flue pipe and/or at the vent/flue
pipe termination. It is our recommendation that all vent/
flue piping exposed to temperatures below 35°F for
extended periods of time should be insulated with 1/2”
thick closed cell foam. Also all vent/flue piping exposed
outdoors in excess of the terminations shown in this manual
(or in unheated areas) should be insulated with 1/2” thick
closed cell foam. Inspect piping for leaks prior to installing
insulation.
The following bullets and diagram describe the restrictions
concerning the appropriate location of vent/flue pipe and
combustion air intake pipe (when applicable) terminations.
Refer to or the installation instructions for specific details
on termination construction.
• All terminations must be located at least 12 inches
above ground level or the anticipated snow level.
• Vent terminations must terminate at least 3 feet
above any forced air inlet located within 10 feet.
NOTE: This provision does not apply to the combus-
tion air intake termination of a direct vent applica-
tion.
• The vent termination of a non-direct vent application
must terminate at least 4 feet below, 4 feet horizon-
tally from, or 1 foot above any door, window, or grav-
ity air inlet into any building.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, win-
dow, or gravity air inlet).
• The vent termination of vent pipe run vertically through
a roof must terminate at least 12 inches above the
roof line (or the anticipated snow level) and be at
least 12 inches from any vertical wall (including any
anticipated snow build up).