22
Technician Setup Menu
Tech Setup Steps
Adjustment Options
Default
LCD Will Show
26
25
Technician Setup Menu
You can disable the sensor on the
thermostat. At least one indoor
remote sensor must be connected
to disable the local thermostat
sensor. Note: Will only show if
remote sensor is set to 1.
Local Temp
Sensor
(Only displayed
if remote sensor
setting is set to 1)
ON enables local T855SH
sensor. OFF disables local
T855SH sensor.
ON
LOCAL TEMP
Enables the use of up to sixteen
indoor sensors. Note: Will only
show Remote Sensor is set to
1 and Local Temp Sensor is set
to on.
Number
of Indoor
Remotes
(Only displayed
if remote sensor
setting is set to 1)
You can use 1, 4, 9, or 16
indoor sensors. Refer to the
R251S Install Manual for de-
tailed connection information
1
NUMBER REMOTE
1
An outdoor temperature above
balance point will cause the
thermostat to energize the Y
terminal(s) only in calls for heat.
An outdoor temperature below
balance point will cause the
thermostat to energize the W2
terminal only in calls for heat.
Dual Fuel
Balance
Point
(Only displayed
if remote sensor
setting is set to
2 and Dual Fuel
AUX = On)
Use the and buttons
to select OFF, 10, 15, 20, 25,
30, 35, 40, 45, 50 degrees.
OFF
BALANCE POINT
OF
Balance point with electric
auxiliary will optimize heat
pump usage. When the outdoor
temperature is above the AUX CUT
OUT selection, the thermostat
will only allow the Y terminal(s)
will energize and lockout the W2
terminal. When the outdoor
temperature falls below the
AUX CUT OUT selection and sits
above the AUX CUT IN selection,
the thermostat will allow the Y
terminal(s) and the W2 terminal
to energize. When the outdoor
temperature is below the AUX
CUT IN selection, the thermostat
will only energize the W2 termi-
nal and lockout the Y terminal(s).
Balance Point
Electric AUX
Cut Out
(Only displayed if
remote
sensor setting is
set to 2 and Duel
Fuel Aux is Off)
Use the and buttons
to select 10, 15, 20, 25, 30,
35, 40, 45, 50 degrees.
OFF
40
AUX CUT OUT
Tech Setup Steps
Adjustment Options
Default
LCD Will Show
This feature allows you to display
temperatures in either Fahrenheit
or Celsius.
˚F or ˚C
˚
F for Fahrenheit
˚
C for Celsius
˚F
F OR C SET
F
o
You can select either a 12 or 24
hour clock setting.
12 or 24
Hour Clock
Use the or key to
select 12 or 24 hour clock.
12H
CLOCK SET
12
The pre-occupancy fan settings
will energize the fan before the
occupied time to provide ventila-
tion prior to scheduled occupancy
time periods. This feature only
shows if the technician setup step
for time periods is set to 2C or 4C.
Use the and buttons to
adjust.
Pre
Occupancy
Fan
You can select the
pre-occupancy fan from OFF,
1, 2, or 3 hours. If 1, 2, or 3
is selected, the fan will turn
on that many hours prior to
the scheduled occupied time
period.
OFF
PRE-OCC FAN
OF
The display light can be
configured to stay on all the
time or turn on when any key
is pressed. There are LOW and
HIGH selections for continuous ON
selection.
NOTE: The thermostat will need to be
hardwired in order for the LOW and
HIGH display light functions to work
properly. “ALWAYS ON LIT” will alter-
nate in the text field with “HARDWIRE
ONLY” when HIGH is selected. These
prompts will alternate every three
seconds.
If the thermostat is hardwired
this feature will default to LOW.
Display
Light
Use the and buttons
to select OFF, LOW, or HIGH.
OFF configures the display
light to come on when the
light key or any button is
pressed.
LOW configures the display
light to stay on at a low
intensity constantly. When a
button is pressed, the display
light will transition to high
intensity.
HIGH configures the display
light to remain on at high
intensity all the time.
ALWAYS ON LIT
dL
OFF
HARDWIRE ONLY
dL
LOW
If
Hardwired
If Battery
Powered
Technician Setup Menu
Tech Setup Steps
Adjustment Options
Default
LCD Will Show
You can configure the thermostat
for one of three remote sensor
applications: 0 No Sensor, 1
Indoor, 2 Outdoor, 3 Floor.
Remote
Sensor
Operation
(Only displayed
if a sensor is
connected
to S1 and S2
terminals)
REMOTE MODE
0
0
Use the left and right
arrows to select one of three
options. View the S1/S2
terminal chart on next page
for an explanation of these
options.
S1 / S2 Terminal
Options Mode
Description
Requires
1
2
3
Indoor
Outdoor
Floor
The local and remote temperatures are averaged.
The outdoor temperature is flashed in clock.
The floor temperature is shown in tech.
R251S
R250S
R250S
Technician Setup Menu
Tech Setup Steps
Adjustment Options
Default
LCD Will Show
Keypad lockout with code
creation is displayed when
Keypad Lockout Code is turned on
(Basic, Partial or Full is selected).
Keypad
Lockout Code
Creation
(Only displayed
if keypad lockout
is set to Basic,
Partial, or Full)
KEY CODE
0000
OFF= Code is disabled and the
lock icon is used to lock and
unlock the display.
ON = Create a 4 digit code that
locks and unlocks the display.
NOTE: In this tech setting, the
clock field will show all four
characters as 0s, with the first
0 blinking.
Select the numbers of the
code by using the and
buttons and switch between
numbers by using the “next”
and “previous” buttons. After
DONE is pressed, the created
code will be saved and will be
needed to activate or deacti-
vate keypad lockout functions.
The master code is 7761. The
master code will override any
created keypad lock code.
0000
This feature allows you to set a
maximum heating setpoint limit.
The setpoint temperature cannot
be raised above this value.
Heat
Setpoint
Limit
This feature allows you to set a
minimum cooling setpoint limit.
The setpoint temperature cannot
be lowered below this value.
Cool
Setpoint
Limit
Use the or key to
select the minimum cooling
setpoint.
Use the or key to
select the maximum heat
setpoint and the minimum
cooling setpoint.
HEAT LIMIT
HE
90˚F
COOL LIMIT
CO
44˚F
This feature will select a
temporary hold time frame for
the programmable mode of the
thermostat. When the setpoint
is changed, the thermostat will
enter into a temporary hold for
the number of hours selected
from this tech setting.
Temporary
Hold Hours
(Only displayed if
program option is
set to 5d or 7d)
Use the and
buttons to select 0, 1, 2, 3,
4, 5 and 6.
4
TEMP HOLDERS
4
21
This setting provides the option
to select a terminal for Fresh Air
damper functions. The selected
terminal cannot be used for
reversing valve operations when
the heat pump setting is turned
on.
Fresh Air
Terminal
(Only displayed
if fresh air mode
is turned ON.
This setting
cannot be used
with PTAC, three
stages of cool,
or economizer
turned on)
Use the and buttons
to select O/B.
FRESH AIR TRM
0
O
This setting selects the minimum
number of minutes that the fresh
air damper will be energized.
Fresh Air
Minutes
Use the and buttons
to select 5, 10, 15, 20, 25,
30, 35, 40, 45, 50, 55 or 60
minutes.
5
40
FRESH AIR MIN
