Goodman AMH8 Service Instructions Manual page 25

PRODUCT DESIGN
Category I Venting (Vertical Venting)
(80% Furnaces Only)
T
O PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO
ASPHYXIATION, NON-CONDENSING GAS FIRED WARM AIR FURNACES MUST
C I D
BE ATEGORY VENTED. O NOT VENT ANY OF THESE FURNACES USING
C III
ATEGORY VENTING.
Category I Venting is venting at a non-positive pressure. A
furnace vented as Category I is considered a fan-assisted
appliance and does not have to be "gas tight." NOTE: Single-
Stage and Two-Stage gas furnaces with induced draft blow-
ers draw products of combustion through a heat exchanger
allowing in some instances common venting with natural
draft appliances (i.e. water heaters).
All installations must be vented in accordance with National
Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition. In
Canada, the furnaces must be vented in accordance with
the National Standard of Canada, CAN/CGA B149.1 and
CAN/CGA B149.2 - latest editions and amendments.
NOTE: The vertical height of the Category I venting system
must be at least as great as the horizontal length of the
venting system.
T
O PREVENT POSSIBLE DEATH OR PERSONAL INJURY DUE TO
ASPHYXIATION, COMMON VENTING WITH OTHER MANUFACTURER'S
INDUCED DRAFT APPLIANCES IS NOT ALLOWED.
When an existing furnace is removed from a venting sys-
tem serving other appliances, the venting system may be
too large to properly vent the remaining attached appliances.
For complete details refer to Exisiting Furnace Removal
section of this manual.
When resizing any portion of the common venting system,
use the appropriate table in Appendix G in the latest edition
of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
Upflow or Horizontal units are shipped with the induced
draft blower discharging from the top of the furnace ("Top"
is as viewed for an upflow installation). The induced draft
blower can be rotated 90 degrees for Category I venting.
Refer to the following figure. For horizontal installations, a
four inch single wall pipe can be used to extend the in-
duced draft blower outlet 1/2" beyond the furnace cabinet.
Vent the furnace in accordance with the National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition. In Canada,
vent the furnace in accordance with the National Standard
of Canada, CAN/CGA B149.1 and CAN/CGA B149.2 -
latest editions and amendments.
WARNING
WARNING
T
O PREVENT DEATH OR SERIOUS ILLNESS TO BUILDING OCCUPANTS DUE
TO FLUE PRODUCTS LEAKING INTO THE BUILDING, PROPER INSTALLATION OF
GASKETS AND SCREWS IS ESSENTIAL FOR PROVIDING A GAS TIGHT SEAL
BETWEEN THE PARTITION PANEL AND THE INDUCED DRAFT BLOWER.
Make sure all wires are at least one inch from flue pipe.
Relocate junction box to right side of cabinet if necessary.
Refer to Electrical Connections section of this manual for
instructions.
Masonry Chimneys
Crown
Clay Tile Size Generally
12" x 12" (24" Length)
Throat
Damper
Breech
Clean Out
Typical Multiple Flue Clay Tile Chimney
WARNING
Wash
Roof Line
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
Attic Floor
1/2" to 1" Air Space
Second Floor
First Floor
Water Heater
Vent Connector
F.A.F. Vent
Connector
Natural Draft
Fan Assisted
Water Heater
Forced Air
Furnace
Basement Floor
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