Amana GUCA045AX30 Service Instructions Manual page 25

COMBUSTION AND VENTILATION AIR
(DIRECT/NON-DIRECT VENT MODELS)
Alternate Combustion Air Intake Location
The alternate combustion air intake location is the large
hole not in line with the induced draft blower outlet. To use
the alternate combustion air intake location, refer to the
following steps, and the "Alternate Combustion Air Intake
Location" figure.
Note: Counterflow unit instructions follow the upflow instruc-
tions.
1. Remove and save the four screws securing the com-
bustion air intake coupling to the furnace's top panel
(upflow).
Counterflow units.
Remove and save the four screws securing the com-
bustion air intake coupling to the basepan. Remove an
additional three screws securing the furnace's internal
combustion air intake pipe to the blower deck.
2. Remove the combustion air intake coupling and gasket
from the top panel.
Counterflow units.
Remove the combustion air intake pipe from the fur-
nace and cut the pipe at the basepan coupling. Save
basepan coupling and gasket, from blower desk cou-
pling, for use in the alternate location. Discard the re-
maining pipe.
3. Remove plastic plug from alternate combustion air in-
take location. Relocate and install plug in standard air
intake location (top cover).
Counterflow units.
Remove plastic plug from alternate combustion air in-
take location. Relocate and install plug in standard air
intake location (basepan). Plug the remaining hole in
the blower deck with the plastic plug included in the
drain kit bag.
4. Upflow and Counterflow units.
With the gasket facing the cabinet side panel, and the
flange's flat spot facing forward, secure the combus-
tion air intake coupling to the cabinet using the screws
removed in step 1 or with field-supplied 3/8" #8 self -
drilling screws.
CAUTION
Be sure not damage internal wiring or other compo-
nents, when reinstalling coupling and screws.
5. Upflow and Counterflow units.
For non-direct vent installations installed horizontally ,
a minimum of one 90° elbow must be installed on the
combustion air intake coupling to guard against inad-
vertent blockage. No elbow is required on the alternate
combustion air intake of upright installations, however,
a minimum clearance of 2 inches is required to assure
proper air supply.
6. Upflow and Counterflow units.
For direct vent installations , secure field-supplied
combustion air intake pipe directly to the air intake cou-
pling. (PVC coupling or elbow required on counterflow
units).
1
REMOVE
2
4 SCREWS
REMOVE
2
REMOVE
AND CUT
3
REMOVE
REMOVE
3 SCREWS
AND
RELOCATE
ADDITIONAL
PLUG FROM
DRAIN KIT
UPFLOW
4
SECURE
TO CABINET
UPFLOW/HORIZONTAL SHOWN
(COUNTERFLOW SIMILAR)
Alternate Combustion Air Intake Location
Non-Direct Vent (Single Pipe) Piping
Non-direct vent installations require only a vent/flue pipe.
The vent pipe can be run horizontally with an exit through
the side of the building or run vertically with an exit through
the roof of the building. The vent can also be run through
an existing unused chimney; however, it must extend a mini-
mum of 12 inches above the top of the chimney. The space
between the vent pipe and the chimney must be closed
with a weather-tight, corrosion-resistant flashing. For de-
tails concerning connection of the vent/flue pipe to the fur-
nace, refer to Vent/Flue Pipe and Combustion Air Pipe -
Standard Furnace Connections or Alternate Furnace Con-
nections section for specific details. Refer to the following
Non-Direct Vent (Single Pipe) Piping - Vent/Flue Pipe Ter-
minations section for specific details on termination con-
struction.
Although non-direct vent installations do not require a com-
bustion air intake pipe , a minimum of one 90° elbow must
be attached to the furnace's combustion air intake if : an
upright installation uses the standard intake location, or a
horizontal installation uses the alternate air intake location.
This elbow will guard against inadvertent blockage of the
air intake.
Vent/Flue Pipe Lengths and Diameters
Refer to the following table for applicable length, elbows,
and pipe diameter for construction of the vent/flue pipe sys-
tem of a non-direct vent installation. In addition to the vent/
flue pipe, a single 90° elbow must be secured to the com-
1
REMOVE 2" CLEARANCE
4 SCREWS REQUIRED
(NON-DIRECT
VENT)
1
3
3
REMOVE
AND
RELOCATE
COUNTERFLOW
5
25
5
.
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