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Thank you for purchasing
your new Comfort-Set 90
Series thermostat. Your new
White-Rodgers thermostat
uses solid state microcomputer technology to
provide precise time/temperature control. This thermostat offers the flexibility
to design heating and cooling
programs that fit your needs.

Adaptable to most 24 volt
residential forced air, multistage (1F95-377 or 1F95-371)
or heat pump systems with
electric or fossil fuel auxil-

Instructions

iary (1F95-377 or 1F94-371).
You will find information
about thermostat buttons and

thermostat's

display in the component
section beginning on page 2.

tabs to help you find sections
of the manual.

1

thermostat

for optional
configuration

begin

on page

4. Program-

ming

information

page

7. Descriptions

begins

of the

features

begin

We have also added

thumb

on page

on

13.

THE THERMOSTAT
See inside
showing
O

BUTTONS

or to select the previous

Used to adjust the time forward,
to select the next menu item.

Lowers

temperature

Raises

0

The multi-color

red for emergency
red for malfunction

Used with TIME

temperature

indicator

green for 1st stage, yellow

glows:
for 2ndstage,

heat and flashing
condition in

system.

menu item.

Used to advance

time, or to reset the filter change
or

_/TIME

to set the current
_)

Used to set the filter change-out

operation

to the

next program period or advance to the
next day in programming
mode.
Used to manually
programming

Used to initiate

or review

thermo-

_}

Selects

override

tan operation

stat programming
or advance to next
program period in programming
mode.

Display

O

during a program

Used with TIME _/TIME
to set the clock.

_

to program

). This button

the

(see The
is also used

the ['an to mn continuously
period.

EMERgency
only), OFF,

mode (HEATing,

(Heat Pump models
COOLing,
or AUTO-

_} Used to adjust
[brward or back.

the clock one hour

Used to start or return
operation.

to hold at a selected

Used to enter and configure
VACATION mode.

_} Sets the system

timer.

matic changeover).

day.

temperature.
(on top of the cover)

lights the display.
O

the time backward,

locations.

(99°F or 37°C maximum)

This button

Used to adjust

cover for illustration

(45°F or 7°C minimum)

(Red arrow)

setting
O

button

(Blue arrow)

setting
O

front

to program

THE DISPLAY
(_) Displays system mode (HEAT,
EMER, OFF, COOL, AUTO,
HOLD, or VACA). During programming displays the time period (MOR,
DAY, EVE, NHT) being programme&. In the configuration menu,
the menu item name is shown, one
word at a time (PRGM MODE,
EMR, COOL FAN DELA OFF, etc.).

_)

CHECK

STAT appears

when the

thermostat detects certain problems
within itsel£ CHECK SYSTEM
appears

when the thermostat

certain problems

in heating

detects
or cooling

the system.

Displays

operating

the length

in a temporary
Also indicates

time remaining

of time
hold
the length of

in VACATION

mode.

FAN ON when the tan is

continuously.

Displays

FAN

AUTO when the tan cycles with the
heating or cooling system. Displays
PRG

FAN ON when t:an is pro-

grammed

i_) Indicates
remaining
condition.

i_

to be on during

i_

Displays

i_

Alternately

temperature
I_

Shows

the setpoint
displays

a period.
temperature.
room

and time of clay.
the current

When programming,

day of the week.
shows

the day(s)

being programmed.
I_) The word HEAT or COOL

will

appear above or below the setpoint
area _) is needed to display other
information.

Figure

[IIIN!I_I!I_I

1. The Display

if

The configuration

menus

allow you to

set certain thermostat operating
characteristics
to your system or
personal

requirements.

To enter

the User Configuration

press PROGRAM

_

To exit either

menu,

to make sure

will show the first item in the

configuration

menu.

The following charts (pages 5 & 6)
describe each item on the menus. Press
TIME _
to move forward to the
next item in the menu or TIME
to move backward

menu and retum

to

normal operation, press PROGRAM
_.
To re-enter to the User menu at

the thermostat is in the run program
mode, then press TIME _
and
TIME _
at the same time. The
display

for at least two seconds.

to the previous

item. Set these according to your
personal preference
using _
or
. To enter the Keypad Lock
menu, while in the User Menu, press
and hold TIME _
and TIME

any time press PROGRAM

_,

then press TIME _
and TIME
at the same time. While in the
menus, if you do not press any buttons
for two minutes, the thermostat will
revert to normal

operation.

User Menu
Step
1

Press Button(s)
TIME _
and TIME
_
at same time
for 2 seconds

Displayed
(Factory Default)
0 °F
(room temperature)

Press _

or _
5 LO to

TIME

_

EMR
(ON)

OFF
or ON L

3

TIME

_

(°F)

°C

4

TIME

_

5

TIME

_

BEEP
(ON)

OFF

6

TIME

_

HEAT FAST
(OFF)

7

TIME

_

8

TIME

_

FAN
(0)

COMMENTS
Adjusts temperature

display higher or lower.

Ref
Page
13

5 HI

2

SET

to select:

0 - 6 HRS

Selects EMR option ON or OFF or L ON.

13

Adjusts temperature

14

display to °F or °C.

Set Fan (one shot) option.
temporary fan option.

Set the duration of a

14

Turns keypad beeper ON or OFF.

14

ON

OFF delays starting second stage for economy.
ON eliminates delay to energize second stage.

14

COOL FAST
(OFF)

ON

OFF delays starting second stage for economy.
ON eliminates delay to energize second stage.

14

TEMP OUT
(OFF)

ON

Enables outdoor temperature sensor. Requires
optional remote sensor connected to terminal OT
and remote thermistor probe.

14

User Menu (Continued)
9

TIME

_

l0

TIME

_

ii

TIME

!

FORE (icon)
(OFF)
COMP

RUN TIME
(00)

AUX RUN TIME

ON

Telephone RUN program feature. Requires optional
X10 system.

15

(Compressor
run time
in hours)

Shows accumulated time compressor has run.
To reset to 00, press _
and _.

15

(AUXILIARY

Shows accumulated

15

(00)
12

PROGRAM

run time

in hours)

time AUXILIARY

To reset to 00, press _

_

has run.

and _.

Returns to normal operation.

Keypad Lockout Menu (access from User Menu)
Step
l

Press Button(s)
TIME _

PART LOCK

and TIME _
(hold for two
seconds)
2

TIME

3

PROGRAM

Displayed
(Factory Default)

_

or _

to select:

(OMMENTS

Ref
Page

ON

Partial Keypad lockout OFF or ON.

15

ON

Total Keypad lockout OFF or ON.

15

(OFF)

LOCK
(OFF)
_

Press _

Returns to normal operation.

MANUAL

OPERATION

Your Comfort-Set
used to control

with the time and temperatures

III thermostat
temperature

(without programming).
operation, press _

can be

manually

For manual
to select

HEAT or COOL, then press PROGRAM _.
Use _
or _
set the temperature

The sample

Your

9) shows

over several

programs

tbr

1. Press PROGRAM

_.

must be programmed

and AM/PM

individually.

To

will

day of the week.
_.

To Set the Program:

Your Program

heating and cooling. The heating and
cooling programs are separate, and

installed

The display

a day of the week. Use TIME
or TIME _
to set to the

6. Press PROGRAM

to change

2. Press SET _.
The display will
show the hour. Use TIME _
or
TIME _
to set to the current hour

the factory

indicate

time periods.

To Set the Clock:

(page

5. Press SET _.

temperature

Program

schedule

Day:

current

Entering

OPERATION

To Set the

The same temperature
can be repeated
more than once if you do not want the

as desired.

PROGRAMMED
Planning

to

you

want in your program. Fill in every
space for your program.

designation.

7. Press _

to select

heating

program)

or COOL

cooling

program).

8. Press PROGRAM

_

HEAT (for
(for
one time.

The display will show MOR, the
settings for time and temperature
and
MON.

use the factory program, set the clock
and press PROGRAM
_
with the
thermostat _
set to Heat, Cool,
or Auto.

3. Press SET _
display

9. If you program Monday
time you press PROGRAM

Fill out the blank

4. Press PROGRAM

will be copied to the rest of the week.
To program the other days of the week
press _/DAY
to until you reach

schedule

(page

10)

again.

The

will show minutes. Use TIME
or TIME _
to set to the
current minutes.
_.

the day you wish to change

the first
_
it

and follow

Steps 10, 11 & 12. You can also copy
the program from one day to another.
To copy, press _/COPY.
The
display will show COPY,

and all the

other days of week will be flashing.
Press _/COPY
again to copy the
day in to the rest of the week or press
TIME _
or TIME _
until
you reach the day you want to copy to
and press _/COPY.
10.Press

TIME

O

14. To program the other mode, repeat
the procedure from step 6.

or TIME

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 red _

or blue

key to adjust the temperature
to match
your schedule. If you want the fan ON
continuously
12.Press

during this period,

PROGRAM

NOR on the display
DAY. Repeat steps

_

time and temperature for this period.
13.Press PROGRA_M _
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 _.
Programming is now complete [br this mode
and your program is running.

press

one time.

will change to
10 and 11 to enter

7-Day Sample HEAT Program
(Shows factory programming)

O

Schedule

O

O

O

O

O

O

O

O

O

O

O

MON

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

TUE

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

WED

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

THU

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

FRI

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

SAT

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

SUN

6:00 AM

70°F (21°C)

8:00 AM

62°F (16°C)

5:00 PM

70°F (21°C)

10:00 PM

62°F (16°C)

O

Morning

O

Day (DAY)
Evening

_]} Night

(MOR)

(EVE)
(NHT)

Start Time
Temperature

7-Day Sample COOL Program
(Shows factory programming)

O

Schedule

O

O

O

O

O

O

O

O

O

O

O

MON

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

TUE

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

WED

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

THU

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

FRI

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

SAT

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

SUN

6:00 AM

78°F (25°C)

8:00 AM

85°F (29°C)

5:00 PM

78°F (25°C)

10:00 PM

82°F (27°C)

O

Morning

O

Day (DAY)
Evening

_]} Night

(MOR)

(EVE)
(NHT)

Start Time
Temperature
10

7-Day Personal HEAT
Program Schedule

O
O

O
O

O

O
O

O

MON
TUE
WED
THU
FRI
SAT
SUN
O

Morning

O

Day (DAY)
Evening

(MOR)

(EVE)

O

Night

(NHT)

O

Start Time

O

Temperature
11

O
O

O

O

7-Day Personal COOL
Program Schedule

O
O

O
O

O

O
O

O

MON
TUE
WED
THU
FRI
SAT
SUN
O

Morning

O

Day (DAY)

O

Evening

_]} Night

(MOR)

(EVE)

(NHT)

O

Start Time

O

Temperature
12

O
O

O

O

CONFIGURATION
Adjustable
(User menu,

MENU FEATURES

Temperature
Display.
Item 1) The room

temperature
display can be adjusted to
read higher or lower by following the
User menu and adjusting the temperature to a higher or lower value. The
thermostat is calibrated at the factory
to display a very accurate room
temperature,
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 ° but you
want it to display 73 °, you can adjust
it. To adjust, refer to the CONFIGURATION
Selectable
Recovery

section

(page 5, item 1).

Energy
(EMR).

Management

(User menu, Item 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.
multistage

heating,

the room temperature
setpoint
per °F

In

the thermostat

will

(65°F) and the

(70°F) is 5°. 5° X 8 minutes
40 minutes. The setpoint on

the display

will actually

change

start 8 minutes early tbr every 1°F
difference between the room tempera-

display

ture and the next programmed
temperature.
In cooling and heat pump

start early in heating is 75 minutes (or
3 hours, 45 minutes ifEMR
ON L is
selected). The maximum
time in

applications,
the thermostat
minutes per °F. For heating
tions in large buildings

uses 15
applica-

where

extra

time to reach the set temperature
may
be desired, EMR Long may be
selected. When EMR ON L is selected

70 ° about 40 minutes

to

The maximum

early.

time the thermostat

cooling

and heat pump

3 hours

and 45 minutes.

heat pump applications
because it takes longer

can

applications
Cooling

is
or

start earlier
to reach the

in the user menu (page 5, item 2) the

desired temperature.
This feature also
minimizes
the use of the auxiliary

thermostat

stages if conditions

uses 15 minutes

per °F.

EXAMPLE:
If the temperature
room is 65°F and the thermostat

in the
is

are such that the

compressor
stages are adequate
reach the desired setpoint.

to

programmed
for 70°F at 7 AM, the
thermostat will start approximately
40

To select or deselect this feature, refer
to the CONFIGURATION
section

minutes

(page 5, item 2).

early. The difference
13

between

Fahrenheit
or Celsius
ture Display.
(User

menu,

Tempera-

Beeper
(User

Item 3) This thermostat

on.
menu,

Item

5) The thermostat

or more degrees below room temperature. If Cool Fast is set to OFF, the

has a beeper that will emit a tone when
any key is pressed. In the user menu,
the BEEP feature can be turned OFF

thermostat will delay the second stage
from 0 to 30 minutes based on how

configure the thermostat to display
Celsius. See the CONFIGURATION

using

your setting.

section

(page 5, item 3).

Heat Fast.

Single

Period

(User

is factory set to display temperature
Fahrenheit.
If you prefer, you may

in

or _

to provide

silent

key operation.

Fan Control.

(User menu, Item 4) This feature
allows you to have the fan run for a
predetermined
period of time by
pressing the FAN key twice within
seconds. Ifa time is set in the User

_

menu,

Outdoor
6) This feature,

manually raise the temperature
three or
more degrees above room temperature.
If Heat Fast is set to OFF, the thermo-

menu (page 5, item 4) the display will
show FAN, # hrs and PRG FAN ON
for six seconds. After six seconds the

stat will delay the second stage from 0
to 30 minutes based on how well the

display will continue to indicate PRG
FAN ON for the time period selected.
After this time period, the tan will
return to normal operation. To return
the tan to normal operation betbre the

Cool

Fast.

(User

menu,

end of the time period,
key.

press

the FAN

first stage is keeping
setting.

Item

up with your

7) This feature,

when set to ON, will bring the second
stage of cooling on any time you
manually

Temperature

(User menu,
Item

when set to ON, will bring the second
stage of heating on any time you
1.5

well the first stage is keeping

lower the temperature
14

three

Item

up with

Sense.

8)A remote

sensor

(F1451378)
may be installed for
outdoor temperature
measurement.

The

sensor

and

enabled
display

must be properly

connected

using the User menu. The
shows the outdoor temperature

from -40 ° to 140°F by pressing the
light button twice within one second
when the thermostat
or hold mode.

is in program

run

Activate RUN PRG by Telephone.
(User menu, Item 9) With the
optional X-10 Telephone Responder,
Model TR551, and Universal Low
Voltage Module, UM506, installed,
you can make a telephone call to run
your program if the thermostat has
been set to Hold or Vacation Hold.
These optional items are available
from Radio Shack.

keypad to prevent unauthorized
tampering with the program. Two

Compressor

and minimum cooling
used in your program.

Run Time.

(User menu, Item 10 and 11) You can
see how long the compressor
has run
(in hours) by viewing the User table,
Item 10. You can see how long the
system Auxiliary

has run (in hours)

viewing the User table, Item 11. These
can be reset to 00 when displayed by
pressing _
and _
at the same
time.
Keypad
(Keypad
feature

Lockout.
Lockout

levels of security are available, Total
Keypad Lockout or Partial Keypad
Lockout.
renders
Keypad
or _

Total Keypad

overrides.

It also limits

temperature

to the maximum

the

heating

temperatures
This is espe-

cially useful in buildings where
unscheduled
events are common.
can change

the temperature,

but only between the temperatures
you
set and only tbr the number of hours
you specify if you set up your Hold
Till timing (see "Temporary
Program
Override"
(page 17). To select or
deselect this feature, refer to the
CONFIGURATION

table) This security

Lockout

all buttons inoperative.
Partial
Lockout allows only the
to operate for temporary

temperature

Anyone
by

TRADITIONAL

Keypad

section

Lock menu).

allows you to lock out the
15

(page 6,

FEATURES

Automatic Changeover.
If you have a heating/cooling system,
the thermostat can be set to automatically switch the system between
heating and cooling as needed. To set
your thermostat to this operating mode,
press _
button until AUTO is
displayed on the screen.
Factory Preprogrammed Times
and Temperatures.
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
Compressor Short-Cycle
Protection.
Your thermostat is designed to protect
your system against premature

fan is selected.

This means

at the time

compressor
thilure by "locking out"
the compressor.
This ensures that the

you set the period

compressor
will stay off for approximately five minutes between cycles.

come on and run continuously
next program time period

When the thermostat is in compressor
lock-out, the word COOL will flash.

Example:
grammed

During

this period,

the compressor

will

not be energized

fan operate

Your thermostat
with the original
for the Monday

in the heating

Programmable
This feature

settings

Fan Control.

allows

you to have your

continuously

through

one

to start, the fan will
until the

is profactory

MOR period

mode.

Pressing PROGRAM
_
will
display MOR, 6AM and 70. Pressing

or more programmed
time periods.
This is useful if you want to have

the FAN key will toggle the programmable fan ON and a second press
would turn it back OFF. When PRG

constant air circulation
during a
specific time period. If you do not use

FAN ON is in the upper right of the
display, your thermostat
is pro-

this feature,

grammed to adjust the temperature
to
70 ° at 6AM and also bring the tan on

the fan will cycle normally

with the heating

and cooling

system.

To program the tan, follow the steps in
the PROGRAMMING
section. In each

program

time period,

At the next time period

you can press the FAN

key to select a continuous
fan or a
normally cycling fan. The display will
show PRG FAN ON when continuous

to run constantly

until the next

time period.
you may

choose to continue the program fan
feature. Change to the next program
period

and press the FAN key until
16

PRG FAN ON is on the display. The
tan will continue to run through this
period as well as the previous one.
If the thermostat is in a period with
continuous tan and you want the tan to
cycle, press the FAN key. PRG FAN
ON on the display will turn off.
Air Filter Change-Out Indicator.
This feature allows the thermostat to
display CHNG FLTR (change filter)
after a set time of tan operation. This is
a reminder to change or clean your air
filter. The factory set interval for
CHNG FLTR to be displayed is 200
hours of fan operation. This can be set
anywhere from 0 to 1950 hours in 25
hour increments. A selection of O0will
cancel this feature.
When CHNG FLTR is displayed, you
can clear it by pressing the FILTER
key. This resets the timer and starts
counting the hours until the next filter
change.

The following steps will allow you to
change the number of hours for filter
change-out.
1. If CHNG

FLTR

is on the display,

press the FILTER key once to reset
the timer. If you do not see CHNG
FLTR proceed

to step 2.

• The thermostat

contact the manufacturer
of your
heating/cooling
equipment.
System
nostics.

and Thermostat

functioning.

Diag-

The display will indicate C H E C K
SYS if the room temperature
does not
rise within two hours of the call for
heat. After two hours the thermostat
will quit calling

number
CliNG

minute (this allows some thrnaces to
reset) and call tbr heat again. It will

3. Press the FILTER key a second
time. The display will show SET
FILTER TIME and will show the
number

of hours

4. Press TIME
to change
ments.

to filter change.
_

or TIME

the time to your require-

times.

indicates

the heating

system

If the

is not

working correctly. You may wish to
consult your furnace manufacturer
or
service person.

to the normal

operating

If unsure

_

to return
mode.

what interval

filter changes

will indicate

CHECK

STAT if one of the following

or cleaning,

Check the keys, make sure nothing
pushing them in.
17

sensor,

After checking the above, press
PROGRAM
_
to reset the
display. If this does not clear the
display, disconnect power for five
minutes.
If these checks
problem,

t:ail to solve the

the thermostat

should

be

replaced.
Temporary

Program

Override.

Any time your program

is running

and

you would like to override it for a
specific amount of time, press
until

the temperature

you

want is displayed. The display will
indicate HOLD, and the number of

occurs.

• One of the keys is stuck down or in.
to use

If using a remote

instructions

or _

5. Press PROGRAM

between

three

temperature
still does not rise, it will
continue to call for heat. This normally

The display

NOTE:

for heat tbr one

repeat this sequence

is not

check connections,
wiring and power.
Refer to remote sensor installation

2. Press the FILTER key, The display
will show SET FILTER TIME and the
of hours remaining before
FLTR indicator will display.

sensor

is

hours remaining
in the hold period will
be indicated with the word HRS. To
adjust

the length of time for the

override,
press
TIME_ orTIME
_. HOLD TILL will be displayed

Programmable
Vacation
Temperature
Operation.

as well as the HOLD period
time. Press the TIME _

The VACATION
key allows you to
program the thermostat to hold a

temperature.
programmed

constant temperature
for 1 to 29 days.
At the end of the day and time you
select, the thermostat will return to

you selected through your vacation
HEAT, COOL, or AUTO.

expiration
or TIME

keys until you reach the time
you would like it to resume the
program. The TIME _
or TIME
keys adjust the time in 15

normal

program

Time/

operation.

minute increments.
This programmed
hold time has a 19 hour maximum.

To program the number of days, press
VACATION.
VACA HOLD TILL will

Beyond 19 hours you may wish to use
the vacation hold feature (page 18). If

be displayed.
show DAYS

you need to, you can adjust the
temperature
up or down.

5 to indicate the factory default of a 5
day period. To change the number of
vacation days, press TIME _
or
TIME _.
Press _
or _
to

Indefinite

Program

Hold.

If you want

to operate

the thermostat

The display will also
(flashing) and the number

set the temperature

you wish to

to keep a set temperature
without a
program running, press PROGRAM
_.
The _
or _
keys can

maintain
vacation

be used to raise or lower the temperature. The thermostat will hold the set

the program to resume by pressing
SET _
once. The current time will

temperature
until you return to the
program by pressing
PROGRAM

while away. While still in the
mode, set the time you want

display. Press TIME _
to adjust
the time in 15 minute increments.
You
may wish to select

a few hours in
18

advance of your expected return
allow time to reach the desired

Your thermostat is now
to hold the temperature

After 20 seconds

the display

return to time/temperature
and will display VACA.
VACATION

to

tZ_r

will

alternation,
Pressing

again will activate

the

vacation mode settings. Pressing
PROGRAM
_
cancels this
feature
normal

and begins
program.

Optional
Sense.

Remote

running

your

Temperature

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 tar as 200 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. Alter installing and connecting the
remote sensor(s) to the thermostat, the
installer can enable each remote indoor
temperature sensor (A, B, and!or C).

You can also assign each sensor
different priorities during different

SENSOR

program periods. This allows the
system to maintain a comfortable
environment

by giving

to occupied locations.
time, efficient system

higher

priority

At the same
operation is
priority

to

L
AVG
Hi
HI
AVG

MOR
DAY
EVE
NHT

A
HI
AVG
AVG
Hi

B
LO
LO
LO
LO

When operating with remote sensor(s),
the thermostat will calculate an

enhanced by giving lower
unoccupied
locations.

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.

EXAMPLE:

Your home

on the upper

level and a guest bedroom

on the main level, along with the living
room, kitchen, etc. The thermostat

to keep the temperature
at the set point
in the upper level. In the DAY and

The temperature at each remote sensor
can be displayed by pressing the light
button twice within one second, with

(sensor L) is located in the hall on the
main level. Remote sensors are located

EVE peroids, the lower level has the
higher priority, so the system will

on the upper

operate

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.

guest bedroom

sensor
has bedrooms

level (sensor A) and the
(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,
programmed

the sensors
as follows:
19

In the MOR and NHT periods,

could be

on the upper

the

level (sensor

A)

has more priority than the lower level
(sensor L), so the system will operate

to keep teh temperature

at the

set point on that level. The sensor
the guest bedroom has the lower

in

priority of the sensors. If there is a
guest, the sensor in that room (sensor
B) should
periods

be changed

to AVG or HI tbr

when that room will be used.,

Toassign
priority
toasensor,
press
PROGRAM

_

and _

to

select the period, then press the
VACATION
key. On the display

in

SAVINGS
TIME key to advance the
time forward one hour in the Spring. In

display also shows the temperature
you
have programmed
or set on the right

the Fall press the DAYLIGHT
SAVINGS
TIME key twice to tall

side of your screen.

place of OCCU or UNOC the priority
of the sensor and the sensor identifica-

back an hour. If you push it three times
in a row (in less than 30 seconds) it

tion will appear.

will return

Press the VACATION

to the original

key to step through the sensors that are
installed and enabled L (local), A, B or

After clock adjustment,

C. Only sensors that are installed and
enabled will be listed. When the sensor

program.

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.
Daylight
One button
change

Savings

Time

adjustment

your thermostat

Button.

allows

you to

clock between

Standard Time and Daylight Savings
Time. Simply push the DAYLIGHT

GRAM

_

to resume

Large Lighted Liquid
Display (LCD).

time setting.
press PROyour normal
Crystal

press the button

on

top of the thermostat
and the display
will light up for three seconds. For ten
minutes
pressing

after pressing the light button,
any other button will light the

display

for ten seconds.

The thermostat display alternately
shows the current time and the current
temperature

on the left side. The
20

The thermostat
supplied

Programming.
uses 24 VAC power

by the system

for normal

operation. The electrolytic
capacitor
allows you the added convenience
of
programming
the thermostat even
when not attached to the wallplate,
Attach

The large numbers and letters on your
LCD screen make it easy to see. In low
light conditions,

Arm Chair

the thermostat

to the wallplate

and allow the capacitor to charge for at
least one hour. After the capacitor is
charged you will have approximately
one hour after removing the thermostat
from the wallplate
program

to configure

and

the thermostat.

Thermostat
Startup
Power Loss.
On installation,

After Total

or when power

restored after a total power
thermostat,
your thermostat

is

loss to the
will

automatically
maintain
aheating
After a power loss, the remote sensors
temperature
of62°F(16°C)
anda
will be operating properly, however,
cooling
temperature
of85°F(29°C). temperature at the remote sensors can
not be displayed until PROGRAM
If the24voltsfromtheHeating/
is pressed.
Cooling
transformer
islost,your
thermostat
willloseitsdisplay
in2
Second Stage Time Delay.
minutes
and
maylosetimeinabout
5 Your thermostat is designed to determine
hours.
Thisholduptimewillbemuch the optimum time to activate the second
shorter
if thecontrol
hadnotbeen
stage. Simply raising the temperature
powered
foratleast
4hours
priorto
in heating or lowering it in cooling will
thepower
outage.
When
power
is
not always three the thermostat to bring
restored,
thethermostat
willreturn
to the second stage on quickly. There is a
thetemperatures
listed
above.
time delay from 0-30 minutes dependIf thishappens,
settheclockandday ing on the performance of the first stage
oftheweek
(use
PROGRAMMINGof the system.
steps
1through
6from"Entering
Example: For the last 2 hours the
YourProgram"
page
7),thenselect thermostat is set on 70 ° and the room
HEAT, EMER,
using the _
PROGRAM
operation
program.

_

COOL

or AUTO

key, and press
to resume

with your previously

set

temperature is 70 ° with the equipment
using only the first stage of heat. Since
the equipment is keeping the temperature within 1 degree of setpoint, the
thermostat will delay second stage for
a longer time if you manually raise the
21

temperature or if the room temperature
quickly changes. Once the second
stage comes on, it will come on sooner
the next time there is a difference
between the setpoint and the room
temperature. The net effect of the
staging program is that when the first
stage is capable of making temperature
the second stage will delay longer.
When the thermostat calculates that
first stage cannot make temperature in
a reasonable time, the second stage
will come on sooner. This built in
function automatically optimizes the
use of additional stages of heat or cool.
Should your needs require a modification of the factory default settings,
refer to "Heat Fast" or "Cool Fast"
instructions on page 14.

Activate RUN PRG by Telephone
15
Adjustable
Temperature
Display -- 11
Air Filter Change-out

Indicator

Arm Chair Programming
Automatic Changeover
Auxiliary

....

...........
............

20
15

Run Time

15

Beeper ON
COMPONENTS
Thermostat
Display

14

14
2
Buttons

..............................

Compressor
Compressor

Run Time
Short-Cycle
Protection
CONFIGURATION

6
14

Daylight Savings Time Button ..... 20
Energy Management
Recovery .... 13

Hold ............

Lockout
Crystal

18
1
15

Display

..............

Operation
Manual

20

Schedule
Sample Program
Personal Program
Set
Clock ................................

9
10
7

Day
Program
System and Thermostat Diagnosis
Temporary Program Override ......
Thermostat Startup After Total
Power Loss
Vacation

7
7
17
17
20
18

7

Programmed
Outdoor
Program

14

14

Keypad
Liquid

15

13
15

Heat Fast

3

5
....

Menu

Indefinite Program
INTRODUCTION

15
4

Keypad Lockout Menu Table
Cool Fast ..............................

Configuration
Traditional

2
15

User Menu Table

Factory Preprogrammed
............
Fahrenheit
or Celsius Temperature
Display ....................
FEATURES

7

Temperature

Sense ........

14

Entering

Your

7

Planning

Your

7

Fan Control,

Single

Period

.........

14

Temporary Override
PROGRAMMING

Fan Control,

Programmable

........

16

Remote

Temperature

17
7
Sense

22

........

18
37-6157A
0101

NOTES

23

NOTES

24



---

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