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small screwdriver to move the switch to the
ON position (see figure at right). Leave the
battery out of the thermostat for at least two
minutes, to allow the thermostat to reset
itself. DO NOT MOVE OPTION SWITCHES
#1 OR #2, as this may affect thermostat
operation. [Option switch #3 enables/dis-
ables keypad lockout (see TOTAL KEY-
PAD LOCKOUT)]. Replace the battery, re-
program the thermostat, if necessary, put
the thermostat back on the wall, and restore
24 VAC power. To set the thermostat for
automatic changeover after programming,
SYSTEM
press
to set the thermostat to AUTO
HEAT/EMER/OFF/
COOL/AUTO
(the setpoint temperature display is blank in
the AUTO mode). The system will now
automatically switch between heating and
cooling, depending on the actual room tem-
perature.
Automatic Changeover
ON
1
2
Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 (see TOTAL KEYPAD LOCKOUT)
Switch #4 ON
In the AUTO mode, the thermostat will not
allow the temperature separation between
the highest heat setting and the lowest cool
setting to be less than 1 F. For example, if
the highest heat setting is 76 F, the lowest
cool setting cannot be below 77 F (see
diagram below).
79
78
77
76
75
74
73
3
4
COOLING TEMPERATURES
DEAD BAND 1 F
HEATING TEMPERATURES
13
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