Maytag Amana M9S80-U Series, Руководство по установке

Страница: 16 / 36

16
FI
LTE
R
AIR FLOW
CENTRAL
RETURN
GRILLE
FI
LTE
R
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
Upright Upflow
Figure 9
Circulation Air Filters
One of the most common causes of a problem in a forced
air heating system is a blocked or dirty filter. Circulating air
filters must be inspected monthly for dirt accumulation and
replaced if necessary. Failure to maintain clean filters can
cause premature heat exchanger failure.
A new home may require more frequent replacement until all
construction dust and dirt is removed. Circulating air filters are
to be installed in the return air duct external to the furnace
cabinet.
Upflow / Horizontal
Models
Minimum Recommended Filter Size^
*M9S8000403AU 1 - 16 X 25 Side or 1 -14 X 24 Bottom Return
*M9S800603AU 1 - 16 X 25 Side or 1 -14 X 24 Bottom Return
*M9S800604BU 1 - 16 X 25 Side or 1 - 16 X 25 Bottom Return
*M9S800804BU 1 - 16 X 25 Side or 1 - 16 X 25 Bottom Return
*M9S800805CU
2 - 16 X 25 Side Return or
1 - 20 X 25 Bottom Return
^Larger filters may be used, filters may also be centrally located
Table 7
Horizontal Installations
Filters must be installed in either the central return register or
in the return air duct work.
Normal Sequence of Operation
Power Up
•
120 VAC power applied to furnace.
•
Integrated ignition control performs internal checks.
•
Upon power-up of the control board, all Seven segments
will be illuminated displaying “8 8 8”. After power-up the
displays will show “I d L”, idle, or stand-by mode.
•
The control is now ready to receive demands from the
room thermostat. Refer to Status Menu in this manual
for interpretation of items displayed in the status menu
Gas Heating Mode
The normal operational sequence in gas heating mode is as
follows:
•
R and W thermostat contacts close, initiating a call
for heat. The control will display heat mode in status
menu; - g h
•
Integrated control module performs safety circuit
checks.
•
Induced draft blower is energized for 30 second pre-
purge period causing pressure sensor contacts to close.
•
Igniter warm up begins after 30 second prepurge
expires.
•
Gas valve opens at end of igniter warm up period,
delivering gas to burners and establishing flame.
•
Integrated control module monitors flame presence.
Gas valve will remain open only if flame is detected.
•
Circulator blower is energized on user selected heat
speed following a fixed thirty second blower on delay.
Electronic air cleaner and humidifier terminal relays are
energized with circulator blower.
•
Furnace operates; integrated control module monitors
safety circuits continuously.
•
R and W thermostat contacts open, completing the call
for heat.
•
Gas valve closes, extinguishing flame.
•
Induced draft blower is de-energized following a thirty
second post purge.
•
HUM terminal relay is de-energized.
•
Circulator blower continues running for selected heat
off delay. If required this can be changed in the field.
•
Electronic air cleaner is de-energized.
•
Furnace awaits the next call from thermostat.
Cooling Mode
The control board support two stages of cooling. If this furnace
is installed with a single stage cooling unit or heat pump, the
Y1 terminal of the control board must be used. A Y2 call on
the control board will be ignored if a Y1 call is not present.
Cooling Mode Sequence of Operation
1st Stage Cooling Mode Sequence:
•
On a call for low stage cooling, the Y1 or Y1 and G
thermostat contacts close signaling the furnace control
board with 24 vac. on Y1 or Y1 and G terminals.
•
The 7-Segment will display; 1 A C
•
The compressor and condenser fan are energized.
•
The circulator fan is energized at low cool speed after
the cool on delay period. The electronic air cleaner EAC