4
DEADBAND (Step 5) — The deadband is the difference in
temperature above the cooling set point or below the heating
set point that the thermostat will wait before turning on the first
stage of heating or cooling. For example, if the cooling set
point is 82 F (28 C) and the deadband is 2 degrees, the first
stage of cooling will not be energized until the temperature
reaches 84 F (30 C). The range of values is 1 to 6 degrees. The
default is 2 degrees.
SET POINT MINIMUM DIFFERENCE (Step 6) — The min-
imum difference between heating and cooling set points can be
user-configured. The range is from 0 to 6 degrees. The default
is 2 degrees. The minimum difference is enforced during
Autochangeover and Program On operation.
CYCLES PER HOUR LIMIT (Step 7) — The number of
times that heating or cooling can be energized per hour can be
configured. Set the variable to ‘‘d’’ for no limit. Set the variable
to ‘‘d1’’ to disable the 5-minute compressor lockout. The vari-
able can also be set from 2 to 6 cycles per hour. The default is
6 cycles per hour.
BACKLIGHT DISPLAY (Step 8) — The display backlight
can be set to ON (always on) or OFF (turn off 8 seconds after
usage). The default is ON.
FAHRENHEIT/CELSIUS OPERATION (Step 9) — The
thermostat can be set to operate in Fahrenheit or Celsius de-
grees. Set the variable to ‘‘F’’ for Fahrenheit operation. Set the
variable to ‘‘C’’ for Celsius operation. The default is ‘‘F.’’
SECURITY LEVEL (Steps 10 to 12) — The Security Level
limits the actions that the user can perform at the thermostat.
There are 4 security levels. When the security level is set to
‘‘0,’’ no security will be in effect. When the security level is set
to ‘‘1,’’ the set point range is limited by the settings of Steps 11
and 12. When the security level is set to ‘‘2,’’ the set point
range is limited by the settings of Steps 11 and 12 and the Pro-
gram On mode is always in effect. When the security level is
set to ‘‘3,’’ the set point range is limited by the settings of
Steps 11 and 12, the Program On mode is always in effect, and
set point changes are prohibited. The default is 0.
Security Maximum Heat Set Point (Step 11) — If the Securi-
ty Level is not set to 0, the maximum heating set point will be
in effect. The user will not be allowed to set the heating set
point over the specified value. The range of values is 35 to 99 F
(1 to 37 C). The default is 80 F (27 C).
Security Minimum Cool Set Point (Step 12) — If the Securi-
ty Level is not set to 0, the minimum cooling set point will be
in effect. The user will not be allowed to set the cooling set
point below the specified value. The range of values is 35 to
99 F (1 to 37 C). The default is 65 F (18 C).
HEAT PUMP CONFIGURATION (Step 13) — This is used
to set the reversing valve polarity for the heat pump. The vari-
able can be set to either ‘‘B’’ or ‘‘O.’’ Set the reversing valve
polarity to the correct value depending on the application. The
default is ‘‘O.’’
Program Thermostat Schedules —
Before pro-
gramming the thermostat, plan the thermostat daily schedule.
The schedule is divided into 7 days (Monday through Sunday).
Each day has from 2 to 4 time periods (Occupied 1, Occupied
2, Occupied 3, Unoccupied) depending on the configuration of
the thermostat. Each occupied time period has a start time, stop
time, heating set point, and cooling set point. The unoccupied
time period has a heating set point and a cooling set point. The
unoccupied time period is active when ever an occupied time
period is not active. Fill in Table 3 as an aid to programming
the daily schedules.
PROGRAMMING MODE — To program the daily sched-
ules, perform the following procedure:
1. Enter Programming mode by pressing the Program but-
ton. The Occupied 1 annunciator will appear on the ther-
mostat display. Use the UP ARROW and DOWN AR-
ROW buttons to set the maximum number of Occupied
periods for each day. The thermostat can be set to 1, 2, or
3. After the number of Occupied periods has been select-
ed, press the Mode button. See Fig. 6.
2. The cooling set point for Occupied 1 will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the cooling set point until the desired tem-
perature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C). Press the Mode button to continue. See
Fig. 6.
3. The heating set point for Occupied 1 will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the heating set point until the desired tem-
perature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C). Press the Mode button to continue. See
Fig. 6.
4. The cooling set point for Unoccupied will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the cooling set point until the desired tem-
perature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied cooling). Press
the Mode button to continue.
5. The heating set point for Unoccupied will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the heating set point until the desired tem-
perature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied heating). Press
the Mode button to continue.
6. The day of the week will be shown. Use the UP ARROW
and DOWN ARROW buttons to change the day of the
week until the desired starting day is shown. Possible
choices are M (Monday) through S (Sunday). Press the
Mode button when the desired day is shown.
Damage to compressor could result if 5-minute compressor
lockout is disabled or compressor is allowed unlimited
cycles. Do not set thermostat Advanced Setup Step 7 to
‘‘d’’ or ‘‘dl’’ unless specifically recommended for the
application.
Fig. 6 — Setting Occupied 1 Set Points
