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American Standard AUD2B060AFV32A Installer's Manual Page 26

Variable speed, 2-stage, 80% upflow/horizontal gas-fired furnaces, fan assisted combustion system with whole house air cleaner.
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Installer's Guide
CONDITIONS THAT AFFECT SYSTEM
OPERATION
1. EXCESSIVE COMBUSTION PRESSURE (WIND IN
EXCESS OF 40 M.P.H.) VENT OR FLUE BLOCKAGE
If pressure against induced draft blower outlet be-
comes excessive, the Pressure Switch will open and
shut off the Gas Valve until acceptable combustion
pressure is again available.
2. LOSS OF FLAME
If loss of flame occurs during a heating cycle, or
flame is not present at the sensor, the flame control
module will close the Gas Valve. The flame control
module will then recycle the ignition sequence,
then if ignition is not achieved, it will shut off the
Gas Valve and lock out the system.
3. POWER FAILURE
If there is a power failure during a heating cycle,
the system will restart the ignition sequence auto-
matically when power is restored, if the Comfort
Control still calls for heat.
4. GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle, the
system Integrated Control Module will recycle the
ignition sequence, than if ignition is not achieved,
the Integrated Control Module will shut off the Gas
Valve and lock out the system.
5. INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the Pressure Switch,
the contacts will remain open and not allow the Gas
Valve to open, therefore the unit will not start. If
failure occurs during a running cycle, the Pressure
Switch contacts will open and the Gas Valve will
close to shut the unit down.
6. RESET AFTER LOCKOUT
When the Integrated Control Module has shut the
system down and gone into lockout, the system
must be manually reset before the unit will restart.
To reset, turn the system power off, then on, then
off and then on again within 30 seconds. This may
be done at the unit's power source or at the Com-
fort Control. The system will not reset unless the
procedure off-on-off-on is completed within 30 sec-
onds.
WHOLE HOUSE AIR CLEANER CHECKOUT
CAUTION
!
Before changing the position of the High Voltage se-
lector switch on the High Voltage power supply,
make sure the power has been removed from the fur-
nace and the High Voltage power supply.
Check out the Furnace Whole House Air Cleaner instal-
lation in accordance with this instructions page 30. Ad-
just ozone setting if needed. See Figure 22 on page 30.
26
NOTE:
Whole House Air Cleaner is energized when
blower is operating and there is a call for heat or cool.
This can result in brief periods of blower operation
with the whole house air cleaner off. This can occur
during the heat fan off period or if the enhanced
mode of operation is chosen for cooling.
WHOLE HOUSE AIR CLEANER
MAINTENANCE
1. For maximum efficiency the COLLECTION CELL
should be inspected and cleaned on a regular basis.
NOTE: A 30 to 90 day cleaning interval is normal
for the COLLECTION CELL and should be ad-
justed based upon unit run time and the home
environment.
2. The FIELD CHARGER must be removed and
cleaned only by a qualified service professional.
3. The FIELD CHARGER must be cleaned at least once
a year.
4. The FIELD CHARGER may require more frequent
cleaning in homes with high indoor relative humid-
ity (greater than 65% RH).
5. Consult your service professional about cleaning
intervals.
WARNING
!
TO PREVENT INJURY OR DEATH DUE TO CONTACT
WITH MOVING PARTS, TURN THE POWER TO THE
FURNACE OFF BEFORE CLEANING OR SERVICING
THE WHOLE HOUSE AIR CLEANER.
FAILURE TO FOLLOW THIS WARNING COULD RE-
SULT IN PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
WARNING
!
RISK OF ELECTRIC SHOCK:
THESE SERVICING INSTRUCTIONS ARE FOR USE BY
QUALIFIED PERSONNEL ONLY. TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO NOT PERFORM ANY
SERVICING
OTHER
THAN
THESE OPERATING INSTRUCTIONS UNLESS YOU
ARE QUALIFIED TO DO SO. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN PROPERTY DAM-
AGE, PERSONAL INJURY OR DEATH.
CAUTION
!
High Voltage is present within the air cleaner for opera-
tion. Turn the power off and wait at least 15 seconds to
allow voltage to discharge.
NOTE: System Information
Before cleaning the coil or ducts in the furnace, re-
move the COLLECTION CELL and FIELD CHARGER
from the air cleaner. Chemicals used during the
cleaning of the Furnace, or ductwork can damage the
air cleaner components and degrade the perfor-
mance of the air cleaner.
THAT
CONTAINED
IN
18-CD24D1-2

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