Amana GMSS9 Series Service Instructions Manual page 31

INSTALLATION CONSIDERATIONS
return air duct next to the blower compartment. Before in-
stalling the air cleaner, consider the application. The elec-
tronic air cleaner must be readily accessible for periodic
inspection and cleaning of the pre-filters and electronic cells
while the media air cleaner must be readily accessible for
periodic inspection and replacement of the Media Air Cleaner
(AMU and GMU) filter cartridge (3 per carton) M0-1056,
M1-1056, M2-1056, M8-1056, to maintain maximum effi-
ciency and trouble-free operation. Carbon Filters 1156-3
and 1856-3 (set of 3) are also available. See Product Cata-
log for exact filter for your model.
NORMAL SEQUENCE OF OPERATION
P U
OWER P
1. 115 VAC power applied to furnace.
2. Integrated ignition control module performs internal
checks.
3. Integrated ignition control module LED will light.
4. Integrated ignition control monitors safety circuits con-
tinuously.
5. Furnace awaits call from thermostat.
N H S
ORMAL EATING EQUENCE
1. R and W thermostat contacts close, initiating a call for
heat.
2. Integrated control module performs safety circuit
checks.
3. The induced draft blower is energized causing pres-
sure switch contacts to close. Induced draft blower
remains energized for pre-purge period.
4. Ignitor warm up begins after pre-purge is completed.
The ignition control has a WARM UP PERIOD OF 17
SECONDS.
5. Gas valve opens at end of ignitor warm up period, deliv-
ering gas to burners to establish flame.
6. The control checks for a signal from the flame sensor
within seven (4) seconds after the gas valve is ener-
gized. Gas will only continue to flow if a flame signal is
present.
7. Circulator blower is energized on heat speed following
a fixed thirty (30) second blower on delay.
8. Furnace runs, integrated control module monitors safety
circuits continuously.
9. R and W thermostat contacts open, allowing the gas
valve to cycle off.
10. Induced draft blower is de-energized following a fifteen
(15) -second post purge.
11. Circulator blower is de-energized following heat off de-
lay period.
12. Furnace awaits next call from thermostat.
Cooling Mode
The normal operational sequence in cooling mode is as
follows:
1. R and Y thermostat contacts close, initiating a call for
cool.
2. Integrated control module performs safety circuit checks.
3. Outdoor fan and compressor are energized.
4. Circulator blower is energized on cool speed following a
fixed five (5) second on delay.
5. Furnace circulator blower and outdoor cooling unit run,
integrated control module monitors safety circuits con-
tinuously.
6. R and Y thermostat contacts open, completing the call
for cool.
7. Outdoor fan and compressor are de-energized.
8. Circulator blower is de-energized following a fixed forty
five (45) second cool off delay period.
9. Furnace awaits next call from thermostat.
Fan Only Mode
The normal operational sequence in fan only mode is as
follows:
1. R and G thermostat contacts close, initiating a call for
fan.
2. Integrated control module performs safety circuit checks.
3. Circulator blower is energized on heat speed. Elec-
tronic air cleaner terminals are energized.
4. Circulator blower runs, integrated control module moni-
tors safety circuits continuously.
5. R and G thermostat contacts open, completing the call
for fan.
6. Furnace awaits next call from thermostat
7. Furnace awaits next call from thermostat.
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