506566−01 09/10
Page 4
Installation and Setup
Refer to the
Quick Start Guide
for all the information about
installing the thermostat on a wall and for field wiring dia-
grams for connecting the thermostat to the system using one
of a number of possible configurations. (Wiring diagrams are
also shown beginning on Page 34.)
NOTE − When electric heat strips are used in the air handler,
the strips MUST be configured on the air handler control
(AHC) board before beginning the discovery" sequence be-
low.
After all wiring connections are made, apply power to the sys-
tem. 24VAC will begin to power up the thermostat.
After power is applied to the thermostat for the first time, the
processor checks the system for installed communicating de-
vices, the System discovery" screen is displayed on the ther-
mostat; followed by the Use this thermostat?" screen (figure
3). Touch
press here
to continue.
tests
Thermostat 1
Use this Thermostat?
setup
HELP
SYSTEM DISCOVERY IN PROGRESS
01.60.00.9999
press here
Figure 3. Use this thermostat screen
During the setup process, alerts may pop open to inform the
installer some item of information that affects the setup (figure
4). Correct the cause of any such alerts prior to continuing
setup.
Thermostat is unable to
communicate to system
components
Please contact local
service technician.
Possible cause is a wiring fault
Figure 4. Alert window
System settings (figure 5) appear first. As you use the up/
down arrows to scroll through the settings, the right hand side
will show the current value. For example,
Current Value:
(35%)
shows the current setting of the
Circulate Fan ON
time
.
Daylight Saving
Time
Circulate Fan ON
Time
Dealer Name
Dealer Address
system settings
to adjust a setting, high-
light it, then press edit.
Current Value:
Current Value:
35.0%
next step
edit
back
setup
HELP
Figure 5. System settings
The following table shows the range/condition and defaults
for the settings.
system setting
range/
condition
default
use
Time and Date
see Page 5
Daylight Saving
Time
Enabled/
Disabled
Enabled
Circulate Fan
ON Time
15 to 45
35%
Dealer Name
(alpha−numeri
c characters)
Lennox
1−800−9−LENNOX
www.lennox.com
use
type
writer to
change
Dealer Address
Dealer Phone
Number
Dealer Email
Dealer Website
If you want to modify a setting, use one of the
Settings change
tools
shown in figure 6. (Set
time and date
as described on
Page 5.) After changes have been made, use
save
to store
the changed data or
cancel
to exit the screen and return to
the list of settings.
Daylight Savings Time
default is underlined
current value is checked
save
cancel
Disabled
Enabled
up/down arrows
scroll through a range for some settings
save
cancel
typewriter
tool used to input names, address, phone numbers
etc.
*
=
r
Lennox Repairman
Dealer Name
2
1
q
w
e
4
3
6
5
8
7
0
9
i
t
y
u
p
o
f
@
!
a
s
d
$
#
^
%
(
&
)
k
g
h
j
l
v
−
z
x
c
_
/
+
.
b
n
m
space
back
space
symbols
CAPS
ON
Figure 6. Settings change tools
