TH8320U AND TH8321U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
13
69-1706
Cycles per
hour (cph) for
3rd Stage
Heat
0260
9
Cycles per hour (cph)
for Auxiliary Heat in
3H/2C Heat Pump
Systems
1-12
1-12 available; typical
settings:
1
—1cph for steam or
gravity system.
3
—3 cph for hot water
systems or high efficiency
(90% or better) fossil fuel
forced air systems.
5
—5 cph for standard
fossil fuel forced air
systems.
9
—9 cph for electric
forced air heat systems.
(electric auxiliary heat for
heat pump systems).
Only shown
if 3H/2C heat
pump system
is selected.
Cycles per
hour (cph) for
Em Heat
0270
9
Cycles per hour (cph)
for Emergency Heat
1-12
1-12 is available; typical
settings:
3
—3 cph for hot water
systems or high efficiency
(90% or better) fossil fuel
forced air systems.
5
—5 cph for standard
fossil fuel forced air
systems.
9
—9 cph for electric heat
systems.
Only shown if
2 heat/1 cool
or 3 heat/2
cool heat
pump is
selected.
Continuous
Backlight
0280
0
Backlight not on
continuously.
Thermostat backlight
comes on with each
key press.
1
Backlight is on
continuously (thermostat
must have a common wire
attached for this function).
Option is
always
shown;
however,
continuously
on backlight
works only if
thermostat is
wired with 24
vac Common.
Additional
Menu Choices
0290
0
Only main menu
options are shown.
Installer Test Options
shown next (Table 7).
1,2
1
—Main Menu and
Regional Settings are
shown plus Installer Test
(Tables 5 and 7 only).
2
—All remaining Menu/
Options shown plus
Installer Test (Tables 5, 6
and 7).
The majority
of application
require only
the Main
Menu
Options.
Table 4. Main Installer Setup Menu. (Continued)
Select
Installer
Setup
Number
Factory Setting
Other Choices
Comments
Option
Description
Options
Description
