Trane S8V2A040M3PC Installation, Operation And Maintenance Manual page 81

N N o o t t e e : : If PS2 does not close within the 45 second time,
the IFC will wait 10 minutes and repeat steps 3 &
4. If on the third attempt during the same heating
call, PS2 does not close within the 45 second
proving time, the unit will run in 1
the thermostat contacts R-W2 open.
5. When the temperature raises enough to satisfy the
thermostat setting, contacts R-W2 will open, the 2
stage gas valve will close, the indoor blower motor
st
will ramp down to 1
continue to run until R-W1 contacts open
6. When the temperature raises enough to satisfy the
thermostat setting, contacts R-W1 will open.
7. The gas valve relay will open, closing the gas valve.
The inducer will continue to run for approximately 5
seconds to remove any combustion byproducts
from inside the furnace.
8. The indoor blower continues to run to remove heat
from the heat exchangers. This blower off time is
field adjustable through the IFC menu setup option.
The seven-segment LED will read 1 DL= Idle, no
thermostat demand.
S S i i n n g g l l e e S S t t a a g g e e C C o o o o l l i i n n g g
1. R-Y1-G contacts on the thermostat close sending
24VAC to the Y1 and G low voltage terminals on the
IFC. The technician should read 24VAC between Y1-
B/C and between G-B/C.
N N o o t t e e : : The factory supplied Y1-O jumper must
remain in place for proper seven-segment
LED readout, and furnace operation. If
removed, the seven-segment LED will read
HP 1 .
2. 24VAC is sent to the OD unit via thermostat wiring.
3. The indoor blower ramps to the cooling airflow.
The seven-segment LED for example will
alternately read:
• CL1 = Cooling, Stage 1
• ARF = Airflow
• 105 = 1050 calculated cfm (value shown x 10)
4. When the temperature is lowered enough to satisfy
the thermostat setting, contacts R-Y-G will open.
5. The OD unit shuts off and the indoor blower shuts
off, unless a blower "Cool Off Delay" has been
enabled in the IFC setup menu options. The seven-
segment LED will read 1 DL = Idle, no thermostat
demand.
T T w w o o S S t t a a g g e e C C o o o o l l i i n n g g
1. See sequence of operation for Single stage cooling
operation above (steps 1-3).
2. R-Y2 contact on the thermostat close sending
24VAC to Y2 low voltage terminal on the IFC.
Technician should read 24VAC between Y2 and B/C.
3. 24VAC is sent to the OD unit via thermostat wiring.
4. The indoor airflow ramps to 2
seven-segment LED for example will read:
S8V2-SVX001-1A-EN
st
stage until
stage, and the unit will
nd
stage airflow. The
• CL2 = Cooling, Stage 2
• ARF = Airflow
• 180 = 1800 calculated cfm (value shown x 10)
5. When the temperature is lowered enough to satisfy
the thermostat setting, contacts R-Y1-Y2-G will
open.
6. The OD unit shuts off and the indoor blower shuts
nd
off, unless a blower "Cool Off Delay" has been
enabled in the IFC setup menu options. The seven-
segment LED will read 1 DL = Idle, no thermostat
demand.
S S i i n n g g l l e e S S t t a a g g e e H H e e a a t t P P u u m m p p
1. R-Y1-G contacts on the thermostat close sending
24VAC to the Y1 and G low voltage terminals on the
IFC. Technician should read 24VAC between Y1-B/C
and between G-B/C.
N N o o t t e e : : The factory supplied Y1-O jumper must
be removed for proper seven-segment
LED readout and furnace operation. If left
in place, the seven-segment LED will read
CL1 .
2. 24 VAC is sent to the OD unit via thermostat wiring.
3. The indoor blower ramps to the cooling airflow.
The seven-segment LED for example will
alternately read:
• HP1 = Heat Pump Heating, Stage 1
• ARF = Airflow
• 105 = 1050 calculated cfm (value shown x 10)
4. When the temperature is lowered enough to satisfy
the thermostat setting, contacts R-Y-G will open.
5. The OD unit shuts off and the indoor blower shuts
off, unless a Cool Off Delay has been enabled in the
IFC setup menu options. The seven-segment LED
will read 1 DL = Idle, no thermostat demand.
T T w w o o S S t t a a g g e e H H e e a a t t P P u u m m p p
1. See sequence of operation for Single stage cooling
operation above (steps 1-3).
2. R-Y2 contact on the thermostat close sending
24VAC to Y2 low voltage terminal on the IFC.
Technician should read 24VAC between Y2 and B/C.
3. 24VAC is sent to the OD unit via thermostat wiring.
4. The indoor airflow ramps to 2
seven-segment LED for example will read:
• HP2 = Cooling, Stage 2
• ARF = Airflow
• 180 = 1800 calculated cfm (value shown x 10)
5. When the temperature is raised enough to satisfy
the thermostat setting, contacts R-Y1-Y2-G will
open.
6. The OD unit shuts off and the indoor blower shuts
off, unless a blower off delay has been enabled in
the IFC setup menu options. The seven-segment
LED will read 1 DL = Idle, no thermostat demand.
S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n
nd
stage airflow. The
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