White Rodgers 90 SERIES 1F95-391 User manual

Thermostat With Humidity Control
Digital 7-Day Programmable
90 SeriesTM
P R E M I U M
1F95-391
Operating Instructions
Retain for Future Use
WHITE-RODGERS

Premium options
to customize the thermostat
to fit your application.
Easy, Menu-Driven Set-Up
and Programming 765432
12
11
10
9
8
17 16 15 14 13
1

1
Introduction Configuration Troubleshooting
Programming Features FAQs Index
THE THERMOSTAT BUTTONS
See inside front cover for illustration
showing button locations.
1
(Blue arrow) Lowers temperature
setting (45°F or 7°C minimum)
2
(Red arrow) Raises temperature
setting (99°F or 37°C maximum)
3
The multi-color indicator glows:
green for 1st stage, yellow for 2nd stage,
flashing yellow for 3rd stage, red for
emergency heat and flashing red for
malfunction condition in system.
4
This button (on top of the cover)
lights the display.
5
Used to initiate or review
thermostat programming or advance to
next program period in programming
mode.
6Used with TIME
FWD
/TIME
BACK
to set the clock.
7Used to adjust the time backward,
or to select the previous menu item.
8Used to adjust the time forward, or
to select the next menu item.
9Used with TIME
FWD
/TIME
BACK
to set the current day.
10
Used to advance operation to the
next program period or advance to the
next day in programming mode.
11
Used to manually override
programming to hold at a selected
temperature.
12
Used to view ambient humidity or
modify humidity setting.
ORIENTATION
13
Selects fan operation (see The
Display page 3). This button is also
used to program the fan to run
continuously during a program period.
14
Used to enter the service menu to
change or reset humidifier, air filter,
UV bulb, and service timers.
15
Sets the system mode (HEATing,
EMERgency (Heat Pump models
only), OFF, COOLing, or
AUTOmatic changeover).
16
Used to adjust the clock one hour
forward or back.
17
Used to start or return to program
operation.

2
LARGE LIGHTED (LCD) DISPLAY
The thermostat display alternately
shows the current time and the current
temperature on the left side. The
display also shows the temperature
you have programmed or set on the
right side of your screen.
1Display system mode (OFF,
AUTO, HOLD, VAC A or HUMD).
During programming displays the time
period (MOR, DAY, EVE, NHT)
being programmed. In the configura-
tion menu, the menu item name is
shown, one word at a time (PRGM
MODE, EMR, COOL FAN DELA
OFF, etc.).
2CHECK STAT appears when the
thermostat detects certain problems
within itself. CHECK SYSTEM
appears when the themostat detects
certain problems in the heating/cooling
or humidity system.
3Indicates the length of time
remaining in a temporary hold
condition. Also indicates the length of
time remaining in VACATION mode.
4Displays FAN ON when the fan is
operating continuously. Displays FAN
AUTO when the fan cycles with the
heating or cooling system.
5Displays the setpoint temperature.
In HUMD mode, shows humidity
setpoint.
6Alternately displays room
temperature and time of day. In
HUMD mode, shows actual humidity.
7Shows the current day of the week.
When programming, shows the day(s)
being programmed.
8The word HEAT or COOL will
appear above or below the setpoint if
area 1is needed to display other
information.
FAN AUTOHRS
CHECK BATTERY
F
AM
MON
FAN AUTO
HEATHEAT
HRS
CHECK BATTERY
F
AM
MON WED THU FRI SAT SUNTUEWED THU FRI SAT SUNTUE
1 1
2 3 4
5
8
67

3
INTRODUCTION
Introduction ..................................................... 3
Configuration ..............................................4-11
Manual Operation and Programming ......12-17
Features .................................................... 18-26
FAQs .......................................................... 27-32
Troubleshooting ....................................... 33-37
Index ............................................................... 38
Use the tabs at the bottom of the page to quickly
locate sections.
Introduction Configuration TroubleshootingProgramming Features FAQs Index
Thank you for purchasing your
new White-Rodgers 90 Series
thermostat with humidity control.
White-Rodgers has been producing
energy saving controls for over 60
years. We have been designing and
producing the White-Rodgers 90
Series family of electronic pro-
grammable thermostats since 1982.
White-Rodgers 90 Series is the
third generation of the electronic
programmable family. We believe
you will find that the White-
Rodgers 90 Series is the most user
friendly and technologically
advanced thermostat and humidity
control available today.
You will find information about
thermostat buttons (page 1) and
display beginning on page 2.

4
CONFIGURATION
The configuration menu allows you to set thermostat operating characteristics to your system or personal requirements.
To enter the menu, press TIME
FWD
and TIME
BACK
once at the same time. Press TIME
FWD
to advance through the
menu options. Press arrow keys to change options.
1
Step Press Button(s) Displayed Press or to select: COMMENTS Ref
(Factory Default) Page
0 F
(0)
5 LO to
5 HI
Adjusts temperature display higher or lower.
2EMR
(ON)
OFF ON
ON L
Selects EMR option ON or OFF or ON L.
TIME
FWD
TIME
FWD
3RH
(0)
20 LO to
20 HI
Adjusts humidity display.
TIME
FWD
4DRY
(OFF)
LO or HI to OFF
To reduce or eliminate condensation during cold
weather. Use LO setting first, if condensation persists
use HI setting.
TIME
FWD
5OPTM CMFT
(ON)
OFF
Enables improved dehumidification in cooling mode
if humidity is above setting.
TIME
FWD
6OPTM DHUM
(OFF)
ON
Available if OPTM CMFT is ON. Provides extra
dehumidification if humidity is above setting. May
reduce temperature setpoint by up to 3 degrees.
TIME
FWD
User Configuration Menu
6
6
7
7
7
8

5
User Configuration Menu (Continued)
Configuration
7(F) C
Adjusts temperature display between F or C
TIME
FWD
8SET FAN
(0)
0 HRS(OFF) to
6 HRS
Set Fan (one shot) option. Set the duration of the
one shot option.
TIME
FWD
9BEEP
(ON)
OFF
Turns beeper ONor OFF.
TIME
FWD
10 HEAT FAST
(ON)
OFF
ON allows second stage to energize if setpoint is raised
3 or more degrees. OFF (economy) minimizes second
stage operation on setpoint changes.
TIME
FWD
11 COOL FAST
(OFF)
OFF
ON allows second stage to energize if setpoint is
lowered 3 or more degrees. OFF (economy) minimizes
second stage operation on setpoint changes.
TIME
FWD
12
Enables Remote Sensor A (connected to SA).
TIME
FWD
REMT SEN A
(OFF)
ON
13
Enables Remote Sensor B (connected to SA).
TIME
FWD
REMT SEN B
(OFF)
ON
14
Enables Remote Sensor C (connected to SA).
TIME
FWD
REMT SEN C
(OFF)
ON
15 STAT SEN L
(ON)
OFF
OFF Disables Thermostat Sensor. (Only available if
remote sensor A, B, or C is connected).
TIME
FWD
8
8
8
9&10
9
9&10
9&10
9&10
8

6
User Configuration Menu (Continued)
CONFIGURATION MENU
FEATURES
Adjustable Temperature Display.
(User menu, Item 1), The room
temperature display can be adjusted to
read higher or lower by following the
User menu and adjusting the tempera-
ture to a higher or lower value. The
thermostat is calibrated at the factory to
display a very accurate room tempera-
ture, but due to various conditions and/
or personal preference, you may wish to
adjust the thermostat display higher or
lower (up to 5°F). For example, if the
thermostat displays a room temperature
of 70°and you want it to display 73°the
display can be adjusted to read 73°. To
adjust, refer to the CONFIGURATION
section (page 4, step 1).
Selectable Energy Management
Recovery (EMR).
(User menu, Step 2) EMR causes the
thermostat to start operating the system
early in order to make the building
temperature reach your program
setpoint at the time you specify. In
multistage heating, the thermostat will
start 8 minutes early for every 1°F
difference between the room tempera-
ture and the next programmed
temperature. In cooling and heat pump
applications, the thermostat uses 15
minutes per °F. For heating applica-
tions in large buildings where extra
time to reach the set temperature may
be desired, EMR Long may be
selected. When EMR ON L is selected
in the user menu (page 4, item 2) the
thermostat uses 15 minutes per °F.
EXAMPLE: If the temperature in the
room is 65°F and the thermostat is
programmed for 70°F at 7 AM, the
thermostat will start approximately 40
minutes early. The difference between the
room temperature (65°F) and the setpoint
(70°F) is 5°and 5°X 8 minutes per °F =
40 minutes. The setpoint on the display
will actually change to display 70°about
40 minutes early. The maximum time the
thermostat can start early in heating is 75
16
Enables outdoor temperature sensor. Requires optional
F145-1378 outdoor sensor.
TIME
FWD
TEMP OUT
(OFF)
ON 10

7
minutes (or 3 hours, 45 minutes if EMR
ON L is selected). The maximum time in
cooling and heat pump applications is 3
hours and 45 minutes. Cooling or heat
pump applications start earlier because it
takes longer to reach the desired
temperature. This feature also minimizes
the use of the auxiliary stages if conditions
are such that the compressor stages are
adequate to reach the desired setpoint.
To select or deselect this feature, refer to
the CONFIGURATION section (page 4,
step 2).
Adjustable Humidity Display (RH)
(User Menu step 3) The room
humidity display can be adjusted to
read higher or lower by following the
configuration menu and adjusting the
humidity to a higher or lower value.
The thermostat is calibrated at the
factory to display a very accurate
room humidity, but due to various
conditions and/or personal preference,
you may wish to adjust the thermostat
display higher or lower (up to +/-
20%). For example, if the thermostat
displays room humidity of 40% but
you want it to display 43% you can
adjust it. To adjust, refer to the
CONFIGURATION section (page 4,
step 3).
Programmable Automatic
Humidity Reduction (DRY)
(User Menu step 4)
This feature automatically lowers
humidity setting when the outside
temperature drops. This is to prevent
the interior windows/walls from
reaching the dew point where water
condenses on surfaces. To achieve
automatic humidity reduction, the
thermostat lowers the humidity when
furnace cycles are long. When the
furnace runs shorter cycles, it increases
humidity. For suggested settings see
table below.
Programmable Dehumidification
Optimal Comfort Mode (OPTM
CMFT)
(User Menu step 5)When turned on
this feature automatically reduces
indoor humidity during calls for
cooling if humidity is 2% above
setting. Humidity is set by pressing the
Humidity button when in the appropri-
ate mode, in this case Cooling, and
pressing the or buttons to
set desired humidity (range 40 to 95)
level followed by pressing Run
Program. This dehumidification
feature uses less energy by maintaining
temperature and dehumidifying only
when a call for Cooling is required.
Configuration

8
Programmable Dehumidification
Optimal Dehumidification Mode
(OPTM DHUM)
(User Menu step 6)When turned on
this feature automatically reduces
indoor humidity if humidity is 2%
above setting. Humidity is set by
pressing the HUMIDITY button
when in the appropriate mode, in this
case Cooling, and pressing the
or buttons to set desired
humidity level followed by pressing
RUN
PROGRAM. This dehumidifi-
cation feature may use more energy
by making dehumidification a priority
initiating a call for cooling if humidity
is 2% above desired setting. This
feature may also over-cool the
condition space by up to 3 degrees to
achieve the desired humidity level.
Fahrenheit or Celsius
Temperature Display.
(User menu, Step 7) This thermostat
is factory set to display temperature in
Fahrenheit. If you prefer, you may
configure the thermostat to display
Celsius. See the CONFIGURATION
Section, page 5.
Single Period Fan Control.
(User menu, Step 8) This feature
allows you to have the fan run for a
predetermined period of time by
pressing the FAN key twice within 1.5
seconds. If a time is set in the User
menu (page 4, step 8) the display will
show FAN, # hrs and PRG FAN ON
for six seconds. After six seconds the
display will continue to indicate PRG
FAN ON for the time period selected.
After this time period, the fan will
return to normal operation. To return the
fan to normal operation before the end of
the time period, press the FAN button.
Beeper on.
(User menu, Step 9) The thermostat
has a beeper that will emit a tone when
any key is pressed. In the user menu, the
BEEP feature can be turned OFF using
or to provide silent key
operation.
Heat Fast.
(User menu, Step 10) This feature,
when set to ON, will bring the second
stage of heating on any time you
manually raise the temperature three or
more degrees above room temperature.
If HEAT FAST is set to OFF, the
thermostat will delay the second stage
from 0 to 30 minutes based on how well
the first stage is keeping up with your
setting.

9
Cool Fast.
(User menu, Step 11) This feature,
when set to ON, will bring the second
stage of cooling on any time you
manually lower the temperature three
or more degrees below room tempera-
ture. If COOL FAST is set to OFF,
the thermostat will delay the second
stage from 0 to 30 minutes based on
how well the first stage is keeping up
with your setting.
Optional Remote Temperature
Sense.
(User menu, Step 12,13,14,15) Up to
three remote sensors (F145-1328) can
be attached to this thermostat to sense
indoor temperature at locations away
from the thermostat. Each sensor may
be located as far as 300 feet away from
the thermostat. This is an excellent
feature if the thermostat is in a poor
location for sensing temperature or if
you want to install the thermostat in a
separate room to prevent tampering.
After installing and connecting the
remote sensor(s) to the thermostat, the
installer can enable each remote indoor
temperature sensor (A, B, and/or C).
When operating with remote sensor(s),
the thermostat will calculate an
average of the sensed temperatures in
all enabled sensor locations (A, B, C
and/or L), then display the average
temperature as the room temperature.
The temperature at each remote sensor
can be displayed by pressing the light
button twice within one second. With
the thermostat in program run or hold
mode. Temperatures at the outdoor and
indoor remote sensors will be
displayed with subsequent presses of
the light button in the following order
(if connected): outdoor sensor, sensor
L, A, B, C. You can also assign each
sensor different priorities during
different program periods. This allows
the system to maintain a comfortable
environment by giving higher priority
to occupied locations. At the same
time, giving lower priority to unoccu-
pied locations enhances efficient
system operation. EXAMPLE: Your
home has bedrooms on the upper level
and a guest bedroom on the main
level, along with the living room,
kitchen, etc. The thermostat (sensor L)
is located in the hall on the main level.
Remote sensors are located on the
upper level (sensor A) and the guest
bedroom (sensor B). The lower level
would be occupied in the DAY
and EVE periods. The upper level
would be occupied in the NHT and
MOR periods. With no guest in the
guest bedroom, the sensors could be
programmed as follows:
Configuration

10
In the MOR and NHT periods, the
sensor on the upper level (sensor A)
has more priority than the lower level
(sensor L), so the system will operate
to keep the temperature at the set point
in the upper level. In the DAY and
EVE periods, the lower level has the
higher priority, so the system will
operate to keep the temperature at the
set point on that level. The sensor in
the guest bedroom has the lower
priority of the sensors. If there is a
guest, the sensor in that room (sensor
B) should be changed to AV G or HI
for periods when that room will be
used. To assign priority to a sensor,
press PROGRAM
VIEW
to advance
the time period you wish to modify,
then press the HUMIDITY button. On
the display in place of period of day
(MOR, DAY, EVE, NHT) the priority
of the sensor and the sensor identifica-
tion will appear. Press the HUMID-
ITY button to step through the sensors
that are installed and enabled L (local),
A, B or C. Only sensors that are
installed and enabled will be listed.
When the sensor you wish to change is
displayed, press the DAYLIGHT
SAVING TIME key to change the
priority (AVG, HI or LO). AVG is the
default setting. A setting of HI gives a
sensor more importance and a setting
of LO gives less importance.
Outdoor Temperature Sense.
(User menu, Step 16) A remote sensor
(F145-1378) may be installed for
outdoor temperature measurement.
The sensor must be properly con-
nected and enabled using the User
menu. The display shows the outdoor
temperature from -40°to 140°F by
pressing the light button twice within
one second when the thermostat is in
program run or hold mode.
KEYPAD LOCKOUT MENU
The keypad lockout menu allows you
to partially or totally lock out the
keypad depending on your system or
personal requirements. To enter the
keypad lockout menu you must first
enter the User Menu, while in the User
Menu press TIME
FWD
and TIME
BACK
the same time for at least one
second. Press TIME
FWD
to
advance through the menu options.
L
AVG
HI
HI
AVG
A
HI
AVG
AVG
HI
B
LO
LO
LO
LO
MOR
DAY
EVE
NHT
SENSOR

11
1
Step Press Button(s) Displayed Press or to select: COMMENTS Ref
(Factory Default) Page
PART LOCK
(OFF)
ON
2LOCK
(OFF)
ON
ON Disables all keypad functions except Temp Up and
Down. User may temporary override within
lowest programmed setpoint in cooling and highest
programmed setpoint in heating.
ON Disables all keypad functions.
TIME FWD
TIME FWD
Keypad Lockout Menu (Must be in User Menu to enter Keypad Lock Menu- press and hold Time and
Time for one second or more).
FWD
BACK
10 & 11
10 & 11
Press arrow keys to change options.
Choose one of the two keypad locks to
prevent unauthorized tampering with
the program. Two levels of security are
available, Total Keypad Lockout or
Partial Keypad Lockout. Total
Keypad Lockout renders all buttons
inoperative. Partial Keypad Lockout
allows only the or
buttons to operate for temporary
temperature overrides. It also limits
the temperature to the maximum
heating and minimum cooling
temperatures used in your program.
This is especially useful in buildings
where unscheduled events are
common. Anyone can change the
temperature, but only between the
temperatures you set and only for the
number of hours you specify if you set
up your Hold Till timing (see “Tempo-
rary Program Override” (page 18).
Configuration

12
MANUAL OPERATION
(Bypassing the Program)
Your White-Rodgers 90 Series
thermostat can be used to control
temperature manually (without
programming). For manual operation,
press
SYSTEM
to select HEAT or
COOL, then press PROGRAM
HOLD
. Use or to set the
temperature as desired.
PROGRAMMED OPERATION
Planning Your Program
The sample schedule (pages 14 & 15)
shows the factory-installed programs
for heating and cooling. The heating
and cooling programs are separate,
and must be programmed individually.
To use the factory program, set the
clock and press PROGRAM
RUN
with the thermostat set to Heat, Cool,
or Auto. Fill out the blank schedules
(pages 16 & 17) with the time and
temperatures you want in your
program. Fill in every space for your
program.The same temperature can be
repeated more than once if you do not
want the temperature to change over
several time periods. This is useful for
homes or businesses that are occupied
all day and only want a setback
temperature at night.
Entering Your Program
To Set the Clock:
1. Press PROGRAM
RUN
.
2. Press SET
TIME
. The display will
show the hour. Use TIME
FWD
or
TIME
BACK
to set to the current hour
and AM/PM designation.
3. Press SET
TIME
again. The display
will show minutes. Use TIME
FWD
or TIME
BACK
to set to the current
minutes.
4. Press PROGRAM
RUN
.
To Set the Day:
5. Press SET
DAY
. The display will
indicate a day of the week. Use TIME
FWD
or TIME
BACK
to set to the
current day of the week.
6. Press PROGRAM
RUN
.
To Set the Program:
7. Press the
SYSTEM
button to select
HEAT (for heating program) or COOL
(for cooling program).
8. Press PROGRAM
VIEW
one time.
The display will show MOR, the
settings for time and temperature and
MON.
PROGRAMMING

13
9. If you program Monday the first
time you press PROGRAM
VIEW
it
will be copied to the rest of the week.
To program the other days of the week
press
ADV.
DAY to until you reach the
day you wish to change and follow
Steps 10, 11 & 12. You can also copy
the program from one day to another.
To copy, press
HOLD
/COPY. The
display will show COPY, and all the
other days of week will be flashing.
Press
HOLD
/COPY again to copy the
day in to the rest of the week or press
TIME
FWD
or TIME
BACK
until you
reach the day you want to copy to and
press
HOLD
/COPY.
10.Press TIME
FWD
or TIME
BACK
to set the time on the display as
selected in your HEATING or
COOLING SCHEDULE. Be sure to
check the AM or PM on the display.
11. Press the or button to
adjust the temperature to match your
schedule. If you want the fan ON
continuously during this period, press
the
FAN
button.
12.Press PROGRAM
VIEW
one time.
MOR on the display will change to
DAY. Repeat steps 10 and 11 to enter
time and temperature for this period.
13.Press PROGRAM
VIEW
to
continue through the entire schedule,
entering time and temperature for each
period. When you are satisfied that
your program matches your schedule,
press PROGRAM
RUN
. Program-
ming is now complete for this mode
and your program is running.
14.To program the other mode, repeat
the procedure from step 6.
Programming

14
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM 10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
62°F (16°C)
MON
TUE
WED
THU
FRI
SAT
SUN
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
6:00 AM 70°F (21°07MA00:8)C °F (21°C)
1
5 6 5 6 5 6 5 6
2 3 4
1Morning (MOR)
2Day (DAY)
3Evening (EVE)
4Night (NHT)
5
Start Time
6
Temperature
7-Day Sample HEAT Program Schedule
(Shows factory programming)

15
82°F (27°C)
82°F (27°C)
82°F (27°C)
82°F (27°C)
82°F (27°C)
82°F (27°C)
82°F (27°C)
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM
5:00 PM 10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
85°F (29°C)
85°F (29°C)
85°F (29°C)
85°F (29°C)
85°F (29°C)
85°F (29°C)
85°F (29°C)
MON
TUE
WED
THU
FRI
SAT
SUN
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
6:00 AM 78°F (25°87MA00:8)C °F (25°C)
1
5 6 5 6 5 6 5 6
2 3 4
1Morning (MOR)
2
Day (DAY)
3
Evening (EVE)
4Night (NHT)
5Start Time
6Temperature
7-Day Sample COOL Program Schedule
(Shows factory programming)
Programming

16
7-Day Personal HEAT
Program Schedule
1Morning (MOR)
2
Day (DAY)
3
Evening (EVE)
4Night (NHT)
5Start Time
6Temperature
MON
TUE
WED
THU
FRI
SAT
SUN
1
5 6 5 6 5 6 5 6
2 3 4

17
MON
TUE
WED
THU
FRI
SAT
SUN
1
5 6 5 6 5 6 5 6
2 3 4
7-Day Personal COOL
Program Schedule
1Morning (MOR)
2
Day (DAY)
3
Evening (EVE)
4Night (NHT)
5Start Time
6Temperature
Programming

18
FEATURES
Pushbutton Backlight
The large numbers and letters on your
LCD screen make it easy to see. In low
light conditions, press the button on
top of the thermostat and the display
will light up for three seconds. For ten
minutes after pressing the light button,
pressing any other button will light the
display for ten seconds.
Factory Preprogramming
This thermostat has been programmed
at the factory. The chart in the
programming examples section lists
these factory settings. If the times and
temperatures are the same as your
schedule, you may simply run the
factory installed program by pressing
PROGRAM
RUN
.
Temporary Program Override
Any time your program is running and
you would like to override it for a
specific amount of time, press
or until the temperature you
want is displayed. The display will
indicate HOLD, and the number of
hours remaining in the hold period is
indicated with the word HRS. To
adjust the length of time for the
override, press TIME
FWD
or TIME
BACK
. HOLD TILL will be displayed
as well as the HOLD period expiration
time. Press TIME
FWD
or TIME
BACK
buttons until you reach the time
you would like it to resume the
program. The TIME
FWD
or TIME
BACK
buttons adjust the time in 15
minute increments. This pro-
grammed hold time has a 19 hour
maximum and 15-minute minimum.
Beyond 19 hours you may wish to use
the vacation hold feature (pages 19 &
20). If you need to, you can adjust the
temperature up or down.
Indefinite Program Hold.
If you want to operate the thermostat to
keep a set temperature without a
program running, press PROGRAM
HOLD
. The temperature Up or Down
buttons can be used to raise or lower
the temperature. The thermostat will
hold the set temperature until you
return to the program by pressing
PROGRAM
RUN
.