Amana GUIA Series Service Instructions Manual page 40

PRODUCT DESIGN
80% Upflow Rotated Induced Draft Blower
Counterflow units are shipped with the induced draft
blower discharging from the top of the furnace ("Top" as
viewed for a counterflow installation). The induced draft
blower can be rotated 90 degrees counterclockwise for Cat-
egory I venting, with the airflow horizontal right to left (Fig-
ure 6). For horizontal installations, a three inch B vent pipe
can be used to extend the induced 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.
Vent
Supply
Air
80% Counterflow Rotated Induced Draft Blower
WARNING
To prevent death or serious illness to building occu-
pants 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.
40
Rev. 1
Masonry Chimneys
Possibility of property damage, personal injury, or death
- Damaging condensation can occur inside masonry
chimneys when a single fan assisted Category I appli-
ance (80% AFUE furnace) is vented without adequate
dilution air. Do not connect an 80% furnace to a ma-
sonry chimney unless the furnace is common vented
with a draft hood equipped appliance, or the chimney
is lined with a metal liner or B metal vent. All installa-
Supply
tions using Masonry chimneys must be sized in accor-
Air
dance with the appropriate Venting Tables.
If an 80% furnace is common vented with a draft hood
equipped appliance, the potential for condensation
damage may still exist with extremely cold conditions,
long vent connectors, exterior chimneys, or any com-
bination of these conditions. The risk of condensation
damage is best avoided by using the masonry chim-
ney as a pathway for properly sized metal liner or B
metal vent.
Clay Tile Size Generally
12" x 12" (24" Length)
Return
Air
Clean Out
Checklist Summary
This checklist serves as a summary of the items to be
checked before venting an Air Command 80 furnace into a
masonry chimney. In addition, we recommend that a quali-
fied serviceman use this checklist to perform a yearly in-
spection of the furnace venting system.
This checklist is only a summary. For detailed information
on each of the procedures mentioned, see the paragraph
referenced with each item.
WARNING
Crown
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
1/2" to 1" Air Space
Throat
Damper
Breech F.A.F. Vent
Connector
Fan Assisted
Forced Air
Furnace
Typical Multiple Flue Clay Tile Chimney
Roof Line
Attic Floor
Second Floor
First Floor
Water Heater
Vent Connector
Natural Draft
Water Heater
Basement Floor