6
ATTACH THERMOSTAT TO SUBBASE
IT IS RECOMMENDED THAT YOU SET OPTION
SWITCHES TO DESIRED POSITION BEFORE ATTACH-
ING ON SUBBASE (see OPERATION). IT IS ALSO
RECOMMENDED THAT YOU PROGRAM THE
THERMOSTAT WITH BATTERY INSTALLED BEFORE
ATTACHING ON SUBBASE (see OPERATION GUIDE
for programming instructions).
POWER TO THERMOSTAT MUST BE OFF BEFORE
ATTACHING THERMOSTAT TO WALL. FAILURE TO
TURN OFF POWER BEFORE ATTACHING THERMO-
STAT MAY CAUSE EQUIPMENT DAMAGE DUE TO
RAPID COMPRESSOR CYCLING.
To attach thermostat to subbase, line up the plastic snap
guides at the top of the thermostat and the 4 connector
pins on the thermostat with the connectors near the top
right section of the subbase (when viewed from the front).
Gently pivot the thermostat down until the 9-pin connec-
tors and the plastic snaps lock into place (see fig. 7). Be
gentle when attaching thermostat. If the thermostat
does not seem to be attaching to the subbase easily,
make sure that the connector pins and plastic snaps are
properly aligned, and that excess wire is pushed into the
wall. Damage to the thermostat may occur if force is
used.
SYSTEM CONFIGURATION
ANY TIME AN OPTION SWITCH IS CHANGED, THE 9
VOLT ENERGIZER
®
BATTERY MUST BE REMOVED
FOR A MINIMUM OF 2 MINUTES.
SET OPTION SWITCHES
1.
Multi-stage Systems — up to 3 heat stages and 2
cool stages
2.
Electric Heat Systems
3.
Economizer — 1st stage cooling
4.
Automatic Changeover from Heat to Cool
The battery maintains the stored program in the event of
a power failure. When attached to the wall with 24 VAC
power applied, the thermostat will function normally with-
out the battery. However, the program will be lost in the
event of a power failure or interruption if the battery is not
installed. When power is restored, the thermostat will
automatically maintain a heating temperature of 64
°
F or
a cooling temperature of 82
°
F (factory preprogrammed)
as needed.
ENGAGE TWO UPPER GUIDES;
PIVOT DOWN
Figure 7. Attaching thermostat to subbase
OPERATION
NOTE
NOTE
ON
1
2
3
4
Switch #1
Switch #2
Switch #3 (see step 3)
Switch #4 (see step 4)
ON
ON
ON
1
2
3
4
Switch #1
Switch #2
Switch #3 (see step 3)
Switch #4 (see step 4)
ON
OFF
ON
1
2
3
4
Switch #1 (see steps 1-2)
Switch #2 (see steps 1-2)
Switch #3
Switch #4 (see step 4)
ON
ON
1
2
3
4
Switch #1 (see steps 1-2)
Switch #2 (see steps 1-2)
Switch #3 (see step 3)
Switch #4 ON
Figure 8. Back of thermostat
Option switches
9-pin connector
4-pin connector
Battery