PRODUCT DESIGN
41
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.
T
HE APPROPRIATE KITS
MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION.
A
LL
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 (90%
FURNACES ONLY)
WARNING
F
AILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR
DEATH.
C
AREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS
SECTION.
WARNING
U
PON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE
ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT
IS PROPERLY SEALED.
L
EAKS 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 appli-
ance or use a vent which is used by a solid fuel appliance.
Do not
use commercially available “no hub connectors” other
than those shipped with this product.
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.
Dual Certification: Non-Direct/Direct Vent (90%
Furnaces Only)
The 90% furnace is dual certified and may be installed as a
non-direct vent (single pipe) or direct vent (dual pipe) appli-
ance. A
non-direct vent
installation requires only a vent/
flue pipe. A
direct vent
installation requires both a vent/
flue pipe and a combustion air intake pipe. Refer to the ap-
propriate section for details concerning piping size, length,
number of elbows, furnace connections, and terminations.
Concentric Vent Termination (90% Furnaces Only)
The Concentric Vent Kits DCVK-20 and DCVK-30 are de-
signed to allow the terminations of a direct vent furnace to
be "concentrically" vented through a wall or roof. These kits
allow a single penetration to support terminations for both
the vent/flue pipe and the combustion air intake pipe.
The Sidewall Vent Kit # 0170K00000S is used with 2" or 3"
dual pipe installations. This kit in NOT intended for use with
single pipe (non-direct vent) installations. You MUST con-
nect the kit as a (direct vent) two-pipe installation.
NOTE:
This kit is not certified for, and must not be applied
to any furnace not listed in this service manual.
Refer to the directions provided with the concentric vent kit
for installation specifications.
NOTE:
The previously used concentric vent kits, HCVK (de-
signed for horizontal, through the wall terminations) and the
VCVK were approved for use in Service Bulletins GF-172
and S-199 (designed for vertical, through the roof termina-
tions.) The appropriate kit must be used for a given termina-
tion placement (horizontal or vertical).
Materials and Joining Methods (90% Furnaces Only)
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.
Two or three inch nominal diameter PVC Schedule 40 pipe
meeting ASTM D1785, PVC primer meeting ASTM F656,
and PVC solvent cement meeting ASTM D2564 specifica-
tions must be used. Fittings must be DWV type fittings meet-
ing ASTM D2665 and ASTM D3311. Carefully follow the
manufacturer’s instructions for cutting, cleaning, and sol-
vent cementing of PVC.