SYSTEM OPERATION
25
•
The gas valve is de-energized.
•
The inducer remains energized for the post purge
period (15 seconds).
•
The indoor blower runs for the selected off delay period
(90 seconds by default, adjustable from 30 – 180
seconds).
Heating Mode Speed Selection
To change the main blower speed in HEATING mode, follow
the following steps:
1. Press left or right button till LED displays “gA1 “(for
single stage HEATING). Press center button and LED
will display the selected speed number as Fxx (xx:
Blower speed number).
2. The control shall rotate available speed number ev-
ery time Left/Right switches are pressed. Table be-
low shows the available speeds for Low & High heat
mode.
3. When the center switch is pressed, the current dis-
played speed shall be selected, and control shall ap-
ply the newly selected speed in next heating call.
NOTE:
Always refer to the Heating Chart to choose from
available heating speeds
THERMOSTAT CALL
AVAILABLE SPEEDS
W/W1
F01
F03
F04
F02 (DEFAULT)
Heating Speed Table for 1 Stage IFC
Continuous Fan Mode Speed Selection
To change the main blower speed in circulation mode, follow
the following steps:
1. Press the left or right switch until LED displays “FSd”.
Press the center switch and LED will display the select-
ed speed number as Fxx (xx: Blower speed number
from 1 to 9). F01 is the default speed for circulation.
2. The control will rotate available speed number every
time left/right switches are pressed. All 9 speeds are
available for circulation.
3. When the center switch is pressed, the current dis-
played speed will be selected, and control will imme-
diately apply that speed setting.
THERMOSTAT
CALL
AVAILABLE
SPEEDS
G
F01
F02
F03
(DEFAULT)
F04
F05
F06
F07
F08
F09
Circulation Speed Table
Cooling Mode Sequence of Operation
Low Stage Cooling Mode Sequence:
On a call for low stage cooling, the Y/Y1 or Y/Y1 and G ther-
mostat contacts close signaling the furnace control board
with 24 VAC on Y/Y1 or Y/Y1 and G terminals.
•
The 7-Segment will display the cool mode:
1 A C
•
The compressor and condenser fan are energized.
•
The circulator fan is energized at low cool speed after
a cool on delay. The electronic air cleaner will also be
energized.
•
After the thermostat is satisfied, the compressor is de-
energized and the Cool Mode Fan Off Delay period
begins.
•
Following the Cool Mode Fan Off Delay period, the cool
circulator and air cleaner relay are de-energized.
2nd Stage Cooling Mode Sequence:
On a call for 2nd stage cooling, the Y2 or Y2 and G thermo-
stat contacts close signaling the furnace control board with
24 VAC on Y2 or Y2 and G terminals.
•
The 7-Segment will display the cool mode:
2 A C
•
The compressor and condenser fan are energized.
•
The circulator fan is energized at cool speed after a
cool on delay. The electronic air cleaner will also be
energized.
•
After the thermostat is satisfied, the compressor is de-
energized and the Cool Mode Fan Off Delay period
begins.
•
Following the Cool Mode Fan Off Delay period, the cool
circulator and air cleaner relay are de-energized
