Sequence Of Operation (Integrated Ignition Control); Upright Installations; Orizontal Nstallations; Ormal Eating Equence - Amana GUI Installation Instructions Manual

the back of the furnace. Supply and return connections to the
furnace may be made with flexible joints to reduce noise transmis-
sion. To prevent the blower from interfering with combustion air or
draft when a central return is used, a connecting duct must be
installed between the unit and the utility room wall. A room, closet,
or alcove must not be used as a return air chamber.
When the furnace is used in connection with a cooling unit, the
furnace should be installed in parallel with or on the upstream side
of the cooling unit to avoid condensation in the heating element.
With a parallel flow arrangement, the dampers or other means used
to control the flow of air must be adequate to prevent chilled air
from entering the furnace and, if manually operated, must be
equipped with means to prevent operation of either unit unless the
damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is recom-
mended that a removable access panel be provided in the outlet
air duct. This opening shall be accessible when the furnace is in-
stalled and shall be of such a size that the heat exchanger can be
viewed for visual light inspection or such that a sampling probe
can be inserted into the airstream. The access panel must be made
to prevent air leaks when the furnace is in operation.
When the furnace is heating, the temperature of the return air en-
tering the furnace must be between 55°F and 100°F.
When a furnace is installed so that supply ducts carry air circu-
lated by the furnace to areas outside the space containing the fur-
nace, the return air shall also be handled by a duct sealed to the
furnace casing and terminating outside the space containing the
furnace.
F - R T S
ILTERS EAD HIS ECTION
R A D
ETURN IR UCTWORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided by the installer. Filters must comply with UL900
or CAN/ULCS111 standards. If the furnace is installed without fil-
ters, the warranty will be voided.
Guide dimples locate the side return cutout locations. Use
a straight edge to scribe lines connecting the dimples. Cut
an opening to match the dimensions of these lines.
NOTE: An undersized opening will cause reduced airflow.
The bottom return is set up as a knock out.
For air delivery of less than 1800 CFM, use a one side or bottom
return.
For air delivery of 1800 CFM or higher, use either two-sided re-
turns or a one-sided return with a bottom return.
Refer to Minimum Filter Area tables at the end of this manual to
determine filter area requirements.
U I
PRIGHT NSTALLATIONS
Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register, a side panel external filter rack kit (up-
flows), or the ductwork above a counterflow furnace. As an alter-
native, a media air filter or electronic air cleaner can be used as
the requested filter. The following figures show possible filter loca-
tions.
B I T
EFORE NSTALLING HE
CENTRAL
RETURN
GRILLE
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
Upflow
Figure 21 - Possible Upright Filter Locations
H I
ORIZONTAL NSTALLATIONS
Filters must be installed in either the central return register or in the
return air duct work.
XI. SEQUEN XI. SEQUEN CE O CE O
XI. SEQUENCE O XI. SEQUEN XI. SEQUEN CE OF OPERA CE O
IGNITI IGNITI IGNITI IGNITIO O O O O N CO IGNITI
Refer to Timing Charts for sequencing.
N H S
ORMAL EATING EQUENCE
1. Thermostat calls for heat.
2. The induced draft blower is energized.
3. The igniter is energized and is allowed to preheat.
4. The gas valve is energized delivering gas to the burners and
starting combustion.
5. The control checks for a signal from the flame sensor within
seven seconds after the gas valve is energized. Gas will
only continue to flow if a signal is present.
6. The control waits 30 seconds and turns on the air circulation
blower to the speed that was selected for heating operation.
7. The thermostat is satisfied and opens.
8. The control de-energizes the gas valve.
9. After a 15 second delay while flue products are purged from
the furnace heat exchanger, the induced draft blower motor
is de-energized.
10. The air circulation blower has a delay-off timing of 90 seconds
(starting from the time the gas valve closes). This allows
more heat from the furnace to be transferred to the conditioned
space. After this time has elapsed, the blower will be de-
energized. Some models include an optional adjustable delay
off timing of 60, 90, 120, or 180 seconds.
N C S
ORMAL OOLING EQUENCE
TROL
With the room thermostat in the FAN-AUTO position, the indoor air
circulation blower and outdoor condensing unit will be energized when
a call for cooling occurs. When the call for cooling ends, the outdoor
condensing unit will be de-energized. The indoor air circulation blower
will continue to run for 45 seconds.
C F
ONSTANT AN
During normal operation, the air circulation blower will continually
run at "Cooling" speed as long as power is present at terminal G. If
a call for heat occurs, the blower will run at heating speed through-
out the heating cycle.
If a trip on high/auxiliary/rollout limit occurs, the air circulation blower
will run at "Heating" speed. Even if power is present at terminal G,
the blower will run at heating speed until the limit closes.
21
FILTER
ACCESS
DOOR
AIR FLOW
RETURN
DUCT
FILTER
SUPPORT
BRACKET
Counterflow
F OPERA F OPERA TIO O O O O N (INTEGRA TI TI N (INTEGRA N (INTEGRA
F OPERA F OPERATI TI N (INTEGRATED N (INTEGRA
N CO N CONTR N CO N CO NTR NTR NTRO O O O O L) L) L) L) L) NTR
- I I
NTEGRATED GNITION
CENTRAL
RETURN
GRILLE
AIR FLOW
TED TED
TED TED
C -
ON