Step 6—Final Settings
1. Assuming the system is to be left in operation after the
installation is complete, use MODE button to select between
HEAT, COOL, EHEAT, or AUTO to provide the desired
operation of heating, cooling, or both.
2. The default set points and programmed schedule conform to
the Energy Star requirements of the U.S. Department of
Energy for both heating and cooling. These provide energy
saving temperature settings.
3. Turn on HOLD if fixed set points are to be used. If the
programmed schedule is to be used, make sure the HOLD icon
is off.
4. For further information on temperature selection and program-
ming, refer to Homeowner’s Guide.
5. If AUTO mode is to be used, be sure both heat and cool set
points are properly adjusted.
6. The FAN button may be used to select between AUTO (fan on
only with equipment) and ON (fan on continuously) fan
modes.
Step 7—Checklist
1. Put away tools and instruments, and clean up debris.
2. Review Homeowner’s Guide with owner.
3. Leave literature packet with owner.
4. Fill out and return survey card.
Table 4—Dual Fuel Thermostat Quick Reference
THERMOSTAT OUTPUTS
Outdoor
Unit
Set DIP
Switch D
24v Hot Common Fan
Heat
Stage 1
Heat
Stage 2
Heat
Stage 3
Cool
Stage 1
Cool
Stage 2
Reversing
Valve
1-Speed
HP
OFF
R
C
G
Y/Y2 (compressor)
W/W1 (furnace lo)
Y1/W2 (furnace hi)
Y/Y2
N/A
O/W2
2-Speed
HP
ON
R
C
G
Y1/W2 (compressor lo) Y/Y2 (compressor hi)
W/W1 (furnace)
Y1/W2
Y/Y2
O/W2
→
Table 3—Wiring Diagram Reference Chart
EQUIPMENT
SELECTION
SINGLE-SPEED
HEAT PUMP
TWO-SPEED
HEAT PUMP
1-Stage Furnace
Fig. 2
Fig. 3
2-Stage Furnace
Fig. 4
Fig. 5
Variable-Speed
2-Stage
Non-Condensing
Furnace
Fig. 6
Fig. 7
Variable-Speed
2-Stage
Condensing
Furnace
Fig. 8
Fig. 9
7
→
→
