Advertisement
T8024D PROGRAMMABLE MULTISTAGE THERMOSTAT
Slide the SYSTEM switch in the bottom right corner of
the thermostat to select the desired system setting.
T U E
T8024
Fig. 7. Digital display and system
switches (FAN and SYSTEM).
INSTALLER SETUP
Setting °F/°C Indication and Heat
Cycle Rate
The following instructions provide information to change
the heating cycle rate to match the heating equipment
and to choose either Fahrenheit (°F) or Celsius (°C).
NOTE:
All four steps must be completed to save
changes to °F/°C indication and heat cycle rate.
1. Enter Installer Setup.
a. Use
or
key to set the temperature setpoint
to 52°F (11°C)
.
SET
b. Press the
and
more than two seconds to enter installer setup.
c. When released, a software revision code is dis-
played.
SET
69-1387-1
H o l d
S e l e
c t
HT.
M12582A
keys simultaneously for
HT.
M12583A
d. Press the
displayed A typical example is shown, but infor-
mation displayed varies by model. This infor-
mation is for factory use only.
OPTIONAL SYSTEM CHECKOUT
When in steps 1c and 1d only, pressing the
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
turns it on.
System setting at COOL: If cool is on, pressing the
key turns it off; if cool is off, pressing the
M18504
on. The five minute minimum off time is bypassed.
CAUTION
Equipment Damage Hazard.
Can short equipment.
Allow compressor to remain off for 5 minutes
before restarting. Refer to manufacturer
recommendations.
NOTE: In Installer Setup only, each press of the
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
setting.
b. Press the
indication.
3. Setting Number of Cool/Heat Stages (T8024 only).
a. Press
4
key. Factory configuration (FC) is
M12584A
key again to display the current
M12587A
key to change the °C or °F
M12586A
to display number of cooling stages.
M20216
key can be
key
key turns it
key
Advertisement
