T8001F, T8024F FLUSH MOUNT PROGRAMMABLE THERMOSTAT
69-1465—3 4
Setting Fan Operation (Fuel) Switch (T8001F Only)
The fan operation (fuel) switch is preset at the factory in
the F position. See Fig. 9. This is the correct setting for
most systems. If this system is an electric heat system,
set the switch to the E position. The E setting allows the
fan to turn on immediately with the heating or cooling
equipment in a system where the G terminal is
connected.
Fig. 9. Fan operation (fuel) switch.
Mounting Thermostat to Wallplate
1. Slide SYSTEM switch to the Off position.
2. Slide the thermostat straight into the wallplate until
it is flush against the wall. See Fig. 10.
Fig. 10. Mounting thermostat to wallplate.
INSTALLER SETUP

Setting °F/°C Indication and Heat Cycle Rate

The following instructions provide the information
necessary to change the heating cycle rate to match the
heating equipment and to choose either Fahrenheit (°F)
or Celsius (°C) display.
NOTE: All four steps must be completed to save
changes to the °F/°C indication and the heat
cycle rate.
1. Enter Installer Setup.
a. Use ▲ or ▼ keys to set the temperature set-
point to 52°F (11°C).
b. Press the ▲ and ▼ keys simultaneously for
more than two seconds to enter installer setup.
c. When released, the three-digit software revi-
sion code is displayed.
d. Press the ▲ key. Factory configuration (FC) is
displayed. (A typical example is shown, but
information displayed varies by model. This
information is for factory use only).

Optional System Checkout

When in steps 1c and 1d only, pressing the ▼ key can be
used to turn heat or cool outputs on and off. Change the
SYSTEM switch setting to test heat or cool outputs. No
action takes place If the system switch is in the Off
position.
Examples:
— System setting at HEAT: If heat is on, pressing
the ▼ key turns it off; if heat is off, pressing the
▼ key turns it on.
— System setting at COOL: If cool is on, pressing
the ▼ key turns it off; if cool is off, pressing the
▼ key turns it on. The 5 minute minimum off
time is bypassed.
NOTE: In installer setup only, each press of the ▲ key
momentarily displays 1. Each press of the ▼
key momentarily displays 2. When the keys are
released, these one-digit codes are no longer
displayed.
2. Setting °C or °F.
a. Press the ▲ key again to display the current
setting.
b. Press the ▼ key to change the °C or °F indica-
tion.
F
E
Hold
Fan
Auto
On
Select
TUE
PM
PRESS THERMOSTAT STRAIGHT
BACK ONTO WALLPLATE M1861
1
Heat
System
CoolOff
M12582
A
SET
HT.
M1258
3
M12584
A
M12587
A
M12586
A