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T8624D CHRONOTHERM
®
IV DELUXE PROGRAMMABLE MULTISTAGE THERMOSTATS
5 69-1412—1
INSTALLER SETUP
NOTE: For most applications, the thermostat factory-
settings will not need to be changed. Review
the factory settings in Table 2 and if no changes
are necessary, go to the Installer System Test
section.
The Installer Setup is used to customize the thermostat
to specific systems. Some of the options include
temperature display, changeover, and outdoor
temperature display. Installer Setup numbers are listed in
Table 3. The table includes all the configuration options
and the factory settings for the T8624.
A combination of key presses are required to use the
Installer Setup feature.
— To enter the installer setup, press and hold the
information i key with the increase ! and
decrease " keys until the first number is displayed.
All display segments appear for approximately three
seconds before the number is displayed. See Fig. 8
and 9.
— To advance to the next Installer Setup, press the
Time ∆ key.
— To change a setting, use the increase ! or
decrease " key.
— To scroll the Installer Setup numbers backward, press
the Time ∇ key.
— To exit the Installer Setup, press Run Program.
Fig. 8. Display of all LCD segments..
Fig. 9. Display of Installer Setup number and setting.
IMPORTANT
Only configurable numbers are shown on the
device. Example: If thermostat does not have a
System key, Installer Setup Number 12 will not
be displayed. Review Table 3 factory settings
and mark any desired changes in the Actual
Setting column. When Installer Setup is
complete, review the settings to confirm that
they match the system.
M14559
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Set Day/TimeSet Program
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Wake Leave Return Sleep
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Room
Filter
Wait
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Fan
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eat
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AM
PM
Hold for
Heat
Cool
Repl Batt
Recovery
DST
TueWedThu Fri Sat Sun
Days
Temporary Setting
Em Ht
M14618
INSTALLER SETUP
NUMBER DISPLAY
(COLUMN 2 OF TABLE 3)
FACTORY SETTING OR OTHER
CHOICE DISPLAY (COLUMN 3
OR 5 OF TABLE 3)
Table 3. Thermostat Installer Setup Options.
Select
Installer Setup
Number (Press
Time ∆ key to
change)
Factory Setting
Other Choices
(Press ! or " key to change)
Actual
SettingDisplay Description Display Description
Not Used. 1 — — — — —
Fan operation. 2 0 Conventional
applications where
equipment controls
fan operation in
heat mode
1 Heat pump and electric heat
applications where
thermostat controls fan
operation in heat mode
Not Used. 3 — — — — —
Heating cycle
rate.
a
4 6 Stage 1 — 6—6 cph is fixed for stage 1.
5 Stage 2 3 or 9 3—3 cph
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
a The cycle rate for the last stage of heat is adjustable with 6 cph as the factory setting.