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T8624D CHRONOTHERM
®
IV DELUXE PROGRAMMABLE THERMOSTAT
68-0166—1
8
Table 6. Thermostat Installer Setup Options.
Installer Setup
Number (Press
Time ▲ key to
Factory-Setting
Other Choices
(Press ▲ or ▼ key to change)
Actual
Select
change)
Display Description Display Description
Setting
Not used 1 thru 3 — — — — —
Heating cycle
46Stage 1 3 or 9
3—3 cph used for steam
rate
a
5 Stage 2
systems
6—6 cph factory setting for all
stages of system
9— 9 cph used for electric
heat
Not used 6 thru 11 — — — — —
System setting
adjustment
12 1 Manual changeover 0 or 2 0—Auto changeover
2—Fixed auto changeover
Adaptive Intelligent
Recovery™ control
13 0 Adaptive Intelligent
Recovery™ control is
activated (system
starts early so setpoint
is reached by start of
program period)
1 Conventional recovery
(system starts recovery at
programmed time)
—
Degree tempera-
ture display
14 0 Temperature is
displayed in °F
1 Temperature is displayed
in °C
Not used 15 — — — — —
Clock format 16 0 12-hour clock format 1 24-hour clock format
Not used 17 and 18 — — — — —
Extended fan
operation in heating
19 0 No extended fan
operation after the call
for heat ends
1 Fan operation is extended
90 seconds after the call for
heat ends.
Extended fan
operation in cooling
20 0 No extended fan
operation after the call
for cool ends
1 Fan operation is extended
90 seconds after the call for
cool ends.
Not used 21 thru 23 — — — — —
Outdoor
temperature display
(models with OT
terminals)
24 0 No outdoor
temperature is
displayed
1 Outdoor temperature is
displayed. Needs a
C7089B1000 Outdoor Sensor
to operate.
Not used 25 thru 29 — — — — —
Deadband 30 3 Heating and cooling
setpoints can be set
no closer than 3°F
(1.5°C)
4 thru 10 Heating and cooling setpoints
can be set no closer than the
chosen value:
4—4°F (2°C)
5—5°F (2.5°C)
6—6°F (3°C)
7—7°F (3.5°C)
8—8°F (4°C)
9—9°F (4.5°C)
10—10°F (5°C)
a
The cycle rate for the last stage of heat is adjustable with 6 cph being the factory setting.
(continued)