T8501 MICROELECTRONIC THERMOSTATS
5 69-0925—4
Fig. 10. Display of all LCD segments.
.
Fig. 11. Display of Installer Setup
number and setting.
CAUTION
Equipment Damage Hazard.
Heat pump and electric heat systems can be
damaged when run without fan.
Configure to 01 in Installer Setup number 02 to
prevent equipment damage.
IMPORTANT
Only configurable numbers are shown on the
device. Example: If thermostat does not have a
system key, Installer Setup Number 12 does not
display. 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.
Em HeatOffCool Auto OnlyHeat CoolOnAutoSystem FanRoomOutdoorEm Ht Temporary SettingWait%HumidAux Ht RemoteReplBatt
M4844
M10105B
INSTALLER SETUP
NUMBER DISPLAY
(COLUMN 1 OF TABLE 2)
FACTORY SETTING OR
OTHER CHOICE DISPLAY
(COLUMN 3 OR 5 OF TABLE 2)
Table 2. Thermostat Installer Setup Options.
Select
Installer Setup
Number (Press
i key to
change)
Factory Setting
Other Choices
(Press ! or # key to change)
Display Description Display Description
Not Used. 01 — — — —
Fan
operationa
02 0 Conventional
applications where
equipment controls
fan operation in heat
mode.
01 Heat pump or electr ic heat
applications where thermostat
controls fan operation in heat
mode.
Not Used. 03 — — — —
Heating cycle
rate.
04 6 6 cph used for
conventional
systems
01, 03
or 09
01—1 cph used for radiant floor
heat, gravity system
03—3 cph used for hot water
systems or high efficiency
furnaces
09—9 cph used for electric heat
systems
Not Used. 05 thru 11 — — — —
Changeover
(T8501D
only)
12 01 Manual changeover 00 00—Auto changeover
Not used 13 — — — —