Filter
Top Products
T8000C, T8001C AND T8024D PROGRAMMABLE THERMOSTATS
68-0195–2
7
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 five minute
minimum off time is bypassed.
NOTE: For T8024D, a second press ▼ turns
on the 2nd stage.
CAUTION
Allow compressor to remain off for 5 minutes before
restarting. Refer to manufacturer recommendations.
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
indication.
3. Setting number of heat/cool
stages (T8024 only).
a. Press ▲ to display
number of cooling stages.
b. Press ▼ to change
number of cooling stages.
c. Press ▲ to display
number of heat stages.
d. Press ▼ to change
number of heat stages.
4. Setting 2nd Stage Heat Cycle Rate (see Table 1) for the
cycle rate options and
equipment).
a. Press the ▲ key to
display the current
heat cycle rate setting
of 1, 3, 6, 9, or 12 cph.
NOTE: If the desired cycle rate is displayed, press the ▲
key to exit the installer setup.
b. To change the second
cycle rate, press the
▼ key until your
choice of 1, 3, 4, 5, 6,
9, or 12 is displayed.
c. Press the ▲ key to
display cooling
algorithm configu-
ration default.
d. Press the ▲ key again to change algorithm to C1
or C3.
C1 = Standard algorithm.
C3 = Agressive algorithm (can cause
overshooting).
e. Press the ▲ key again.
Current configuration
(CC) is displayed. A
typical example is
shown, but CC varies
by model. (This
information is for factory use only.)
5. Exit Installer Setup.
a. Press the ▲
key to save
all changes
and return to
normal
operation.
Table 1. Heating Cycle Rates
a
High efficiency furnace (90+).
b
Refer to the equipment manufacturer s Instructions.
M12586A
M12587A
M20215
M20216
M20217
M20218
M12588A
M12589A
M14691
System
Cycles
Per Hour
Steam, Gravity 1
Hydronic Heat, Condensing Gas Furnaces
a
3
Gas or Oil Forced Air 6
Electric Heat 9
Special Applications
b
12
M12590A
PM
M14692