4. Press MODE button until EHEAT is displayed. Furnace
should begin to operate within 5 minutes.
D.
Cooling Operation
1. Press MODE button until COOL is displayed under the
mode annunciator.
2. Press down button until display reads 10 degrees below
room temperature. Cooling system should begin to operate
within 5 minutes.
VII.
SELECT DESIRED OPERATION
1. Press FAN button to select AUTO or ON position. Fan
annunciator displays current selection.
2. Press MODE button to select OFF, HEAT, COOL, or
EHEAT. If AUTO is selected, first select heating desired
temperature in HEAT mode and cooling desired tempera-
ture in COOL mode. Refer to homeowner’s guide. Mode
annunciator displays current selection.
3. Press up or down buttons to select desired temperature.
4. If daily cycles are to be programmed now, refer to Home-
owner’s Guide for programming instructions.
5. If thermostat has not been programmed, press HOLD button
to retain desired temperature setting.
NOTE:
If HOLD button is not left ON, temperature setting will
be lost until time/temperature program is entered.
VIII.
CHECKLIST
1. Put away tools and instruments, and clean up debris.
2. Review Homeowner’s Guide with owner.
3. Leave literature packet with owner.
Fig. 2—Single-Stage Furnace with
Single-Speed Heat Pump
A95215
Y/Y2
W/W1
R
24 VAC HOT
FAN
FURNACE
COMPRESSOR
RVS COOLING
N/A
DUAL FUEL
THERMOSTAT
SINGLE-SPEED
HEAT PUMP
24 VAC COM
RVS HEATING
RVS SENSING
OUTDOOR
SENSOR
CONNECTION
G
R
R
W
Y
Y
G
C
C
O/W2
Y1/W2
SINGLE-STAGE
FURNACE
W2
O
OUTDOOR
TEMPERATURE
SENSOR
SEE NOTE 1
S2
S1
L
B
C
Fig. 3—Two-Stage or Variable-Speed Furnace with
Single-Speed Heat Pump
A95216
Y/Y2
W/W1
R
24 VAC HOT
FAN
FURNACE LO
COMPRESSOR
RVS COOLING
FURNACE HI
DUAL FUEL
THERMOSTAT
SINGLE-SPEED
HEAT PUMP
24 VAC COM
RVS HEATING
RVS SENSING
OUTDOOR
SENSOR
CONNECTION
S2
S1
L
B
G
R
R
Y
G
C
C
C
O/W2
Y1/W2
TWO-STAGE OR
VARIABLE SPEED
FURNACE
W2
O
SEE NOTES 1 AND 2
W/W1
Y/Y2
O
W2
Y1
OUTDOOR
TEMPERATURE
SENSOR
A95217
Fig. 4—Single-Stage Furnace with
2-Speed Heat Pump
Y/Y2
W/W1
R
24 VAC HOT
FAN
FURNACE
COMPRESSOR HI
RVS COOLING
COMPRESSOR LO
DUAL FUEL
THERMOSTAT
TWO-SPEED
HEAT PUMP
24 VAC COM
RVS HEATING
RVS SENSING
OUTDOOR
SENSOR
CONNECTION
S2
S1
L
B
G
R
R
W
Y2
Y
G
C
C
C
O/W2
Y1/W2
SINGLE-STAGE
FURNACE
W2
O
SEE NOTE 1
Y1
W3
OUTDOOR
TEMPERATURE
SENSOR
—5—