Universal Electronics 975 User Manual

UniversalUniversal

Universal

UniversalUniversal

Digital 7 Day
Programmable

Comfort-Set

90 Series90 Series

90 Series

90 Series90 Series

PREMIUM

Model 975Model 975

Model 975

Model 975Model 975

Installation and OperatingInstallation and Operating

Installation and Operating

Installation and OperatingInstallation and Operating
InstructionsInstructions

Instructions

InstructionsInstructions

Retain for Future Use

®

TM

Easy, Menu-Driven Set-UpEasy, Menu-Driven Set-Up

Easy, Menu-Driven Set-Up

Easy, Menu-Driven Set-UpEasy, Menu-Driven Set-Up
and Programmingand Programming

and Programming

and Programmingand Programming

1

5

2

4

3

6

7 8

9

10
11

12

Premium options
to customize the thermostat
to fit your application.

17

16

15

14

13

INTRODUCTION

Thank you for purchasing
your new Model 975 thermo­stat. White-Rodgers has been
producing energy saving
controls for over 60 years.
We have been designing and
producing the Comfort-Set
family of electronic program­mable thermostats since

1982. Model 975 is the third
generation of the electronic
programmable family. We
believe you will find that
Model 975 is the most user

friendly and technologically

Introduction

Orientation

advanced thermostat available
today.

You will find information
about thermostat buttons and
display in the component
section beginning on page 2.

Installation instructions begin
on page 4.

Instructions for optional
thermostat configuration
begin on page 23. Program­ming information begins on
page 26. Descriptions of the
thermostat’s features begin on
page 32.

We have also added thumb
tabs to help you find sections
of the manual.

1

Installation Programming

Configuration

Features

Index

ORIENTATION

THE THERMOSTAT BUTTONSTHE THERMOSTAT BUTTONS

THE THERMOSTAT BUTTONS

THE THERMOSTAT BUTTONSTHE 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 yellow indicator glows when

the system is operating.

4

This button (on top of the cover)

lights the display.

5

Used to initiate or review thermostat

programming.

6

Used with TIME

BACK

to set the clock.

FWD

/TIME

7

Used to adjust the time backward, or

to select the previous menu item.

8

Used to adjust the time forward, or

to select the next menu item.

9

Used with TIME

BACK

to set the current day.

10

Used to advance operation to the

FWD

/TIME

next program period.

11

Used to manually override
programming to hold at a selected
temperature.

12

Used to enter and configure the
VACATION mode.

13

Selects fan operation (see The
Display 21 ). This button is also used to
program the fan to run continuously
during a program period.

2

14

Used to set the filter change-out

time, or to set the filter change timer.

15

Sets the system mode (HEATing,

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.

THE DISPLAYTHE DISPLAY

THE DISPLAY

THE DISPLAYTHE DISPLAY

18

Displays system mode (

COOLCOOL

AA

UTUT

OO

A

AA

UT

UTUT

HOLDHOLD

O,

HOLD, or

OO

HOLDHOLD

COOL,

COOLCOOL

HEAHEA

HEA

HEAHEA

VV

AA

V

A

VV

AA

TT

T,

TT

CACA

CA).

CACA

OFFOFF

OFF,

OFFOFF

During programming displays the time

MOR, DAY, EVE, NHTMOR, DAY, EVE, NHT

period (

MOR, DAY, EVE, NHT) being

MOR, DAY, EVE, NHTMOR, DAY, EVE, NHT

programmed.. In the configuration
menu, the menu item name is shown,

PRPR

GMGM

one word at a time (

EMREMR

COOLCOOL

FF

EMR,

EMREMR

ANAN

COOL

F

AN

COOLCOOL

FF

ANAN

18 18

19

CHECK BATTERY STAT SYSTEM

MON

PR

PRPR

DELADELA

DELA

DELADELA

2324

GM

GMGM

°F

AM

MODEMODE

MODE,

MODEMODE

OFFOFF

OFF, etc.).

OFFOFF

21

20

FAN AUTOHRS

22

Figure 1. The Display

Orientation

19

CHECK BATTERYCHECK BATTERY

CHECK BATTERY appears when

CHECK BATTERYCHECK BATTERY

the “AA” alkaline batteries are weak and
should be replaced.

BATTERYBATTERY

BATTERY appears

BATTERYBATTERY

when the thermostat is running on
battery power only.

CHECK STCHECK ST

CHECK ST

CHECK STCHECK ST

AA

TT

A

T

AA

TT

appears when the thermostat detects
certain problems within itself.

SYSTEM SYSTEM

SYSTEM appears when the thermostat

SYSTEM SYSTEM

CHECKCHECK

CHECK

CHECKCHECK

detects certain problems in the heating
system.

21

CHECK BATTERY

MON WED THU FRI SAT SUNTUEWED THU FRI SAT SUNTUE

PRG

HRS

FAN ON

HEATHEAT

°F

AM

25

3

20

Indicates the length of time
remaining in a temporary hold
condition. Also indicates the length of
time remaining in VACATION mode.

21

Displays
operating continuously. Displays

AA

UTUT

A

UT

AA

UTUT

FF

AN ONAN ON

F

AN ON when the fan is

FF

AN ONAN ON

OO

O when the fan cycles with the

OO

FF

ANAN

F

AN

FF

ANAN

heating or cooling system.

22

Displays the setpoint temperature.

23

Alternately displays room
temperature and time of day.

24

Shows the current day of the week.
When programming, shows the day(s)
being programmed.

25

The word

HEAHEA

HEA

HEAHEA

TT

T or

TT

COOLCOOL

COOL will

COOLCOOL

appear above or below the setpoint if
area 18 is needed to display other
information.

INSTALLATION

DESCRIPTIONDESCRIPTION

DESCRIPTION

DESCRIPTIONDESCRIPTION

This White-Rodgers Automatic
Setback Digital Thermostat uses
microcomputer technology to
provide precise time and
temperature control. This

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

Model 975:

7 Day programming

ELECTRICAL DATAELECTRICAL DATA

ELECTRICAL DATA

ELECTRICAL DATAELECTRICAL DATA

Electrical Rating:

17 to 30 VAC, 50/60 Hz

0.05 to 1.5 Amps

1.5 Amps maximum total load (all
terminals combined)

thermostat offers the flexibility
to design heating and cooling
programs that fit personal needs.
This thermostat is adaptable to
most 24 Volt residential forced

Standard Systems:

Fuel: gas, oil, electric.
Type:Heating/Cooling, Heat

Only, Hot Water or Steam
Systems, Single Stage
Compressor Heat Pump

THERMAL DATATHERMAL DATA

THERMAL DATA

THERMAL DATATHERMAL DATA

Setpoint Temperature Range:

45° to 99°F (7° to 37°C)

4

air, hydronic (hot water or
steam), millivolt, electric heat,
zone and single-stage heat pump
systems.

Operating Ambient Temperature:

32° to 110°F (0° to 43°C)

Operating Humidity Range:

90% non-condensing max.

Shipping T emperatur e Range:

-4° to 131°F (-20° to 55°C)

PRECAUTIONSPRECAUTIONS

PRECAUTIONS

PRECAUTIONSPRECAUTIONS

WARNINGWARNING

!

WARNING

WARNINGWARNING

▲

Do not short out terminals
on gas valve or primary
control to test. Short or
incorrect wiring will damage
thermostat and could cause
personal injury and/or
property damage.

Do not use on circuits
exceeding specified voltage.
Higher voltage will damage
thermostat and could cause
shock or fire hazard.

Thermostat installation
and all components of the
system shall conform to
Class II circuits per the NEC
code.

CAUTIONCAUTION

!

CAUTION

CAUTIONCAUTION

▲

To prevent electrical shock
and/or equipment damage,
disconnect electric power to
system at main fuse or
circuit breaker box until
installation is complete.

NOTENOTE

NOTE

NOTENOTE

Read all instructions
thoroughly before beginning
installation.

This thermostat is intended for use
with a low voltage system. Do not
use directly on a line voltage system
unless an isolation relay/transformer
is installed.

5

Installation

Do not exceed ratings shown in the
Specifications section, preceding
page. If in doubt about the electrical
ratings of your heating/cooling
system, have it inspected by a
qualified heating and air condition­ing contractor or licensed electri­cian.

All wiring must conform to local
and national electrical codes and
ordinances.

This control is a precision instru­ment, and should be handled
carefully. Rough handling or
distorting components could cause
the control to malfunction.

INSTALLATIONINSTALLATION

INSTALLATION

INSTALLATIONINSTALLATION
ATTENTION!ATTENTION!

ATTENTION!

ATTENTION!ATTENTION!

This product does not contain
mercury. However, this product
may replace a unit which contains
mercury.

Do not open mercury cells. If a
cell becomes damaged, do not touch
any spilled mercury. Wearing non­absorbent gloves, take up the spilled
mercury with sand or other
absorbent material and place into a
container which can be sealed. If a
cell becomes damaged, the unit
should be discarded.

Mercury must not be discarded in
household trash. When the unit this
product is replacing is to be
discarded, place in a suitable
container and return to White­Rodgers at 2895 Harrison Street,
Batesville, AR 72501 for proper
disposal.

REMOVEREMOVE

REMOVE

REMOVEREMOVE
OLD THERMOSTATOLD THERMOSTAT

OLD THERMOSTAT

OLD THERMOSTATOLD THERMOSTAT

Shut off electricity at main fuse or
circuit breaker box until installation
is complete AND the jumper leads
on the back of the new thermostat
are configured properly.

Remove the front cover of the old
thermostat. With wires still attached,
remove wall plate from the wall.

Identify each wire attached to the
thermostat using one of the labels

enclosed with the new thermostat.
Disconnect the wires from the old

thermostat one at a time. DO NOT
let the wires fall back into the wall.

Install the new thermostat using the
following procedures.

6

ATTACH BASE TO WALLATTACH BASE TO WALL

ATTACH BASE TO WALL

ATTACH BASE TO WALLATTACH BASE TO WALL

Remove packing material from the
thermostat. Place fingers of one
hand on the center top and bottom
portion of the thermostat. Grasp the
base in the other hand on top and
bottom center and gently pull
straight out. Forcing or prying on
the thermostat will cause damage to
the unit.

Place the base over the hole in the
wall where the wires come out and
mark mounting hole locations using
the base as a template. Drill
pilot holes, and install screw
anchors in the wall.

Run wires through hole in base and
attach base to wall (see fig. 1).

3

/16”

Insert the wires into the terminals on
the base using the appropriate
wiring diagram and tighten the
terminal screws.

CONFIGURINGCONFIGURING

CONFIGURING

CONFIGURINGCONFIGURING
AND PROGRAMMINGAND PROGRAMMING

AND PROGRAMMING

AND PROGRAMMINGAND PROGRAMMING

Before the power is turned on, the
thermostat must be configured to
operate properly with the system.
See the CONFIGURATION section
of this manual.

This thermostat can be programmed
for automatic temperature control.
Refer to Operating Instructions for
programming.

2

1

Figure 1. Thermostat base and terminalsFigure 1. Thermostat base and terminals

Mounting screws

1

Pull wires through this opening

2

Insert wires into terminal holes, then tighten screws

3

Screw anchors

4

Figure 1. Thermostat base and terminals

Figure 1. Thermostat base and terminalsFigure 1. Thermostat base and terminals

7

Installation

S1 S2 S3

MVWRHRCGYOB6

4

3

1

WIRING DIAGRAMSWIRING DIAGRAMS

WIRING DIAGRAMS

WIRING DIAGRAMSWIRING DIAGRAMS

All wiring diagrams are for typical systems only. Refer to equipment manufacturers’ instructions for specific system
wiring information.

3

2

1

H

MV 6 Y G W

E

From heating system

1

From 24 VAC transformer

2

Red jumper wire (provided)

3

See page 10 for letter identification.

Figure 2. Typical wiring diagram for heating only, two-wire, single transformer systemFigure 2. Typical wiring diagram for heating only, two-wire, single transformer system

Figure 2. Typical wiring diagram for heating only, two-wire, single transformer system

Figure 2. Typical wiring diagram for heating only, two-wire, single transformer systemFigure 2. Typical wiring diagram for heating only, two-wire, single transformer system

O B

RC RH

W

MVWRHRCGYOB6

L

KJ

I

M

NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is

connected between thermostat’s RH and RC terminals for proper
operation with this system.

8

RH

MV 6 Y G W

O B

H

RC RH

3

2

1

RH

W

4

5

Y

G

C

D E

I

From heating system

1

From 24 VAC transformer

2

Red jumper wire (provided)

3

Red jumper wire (provided)

4

Red jumper wire (provided)

5

See page 10 for letter identification.

Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer systemFigure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system

Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system

Figure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer systemFigure 3. Typical wiring diagram for heat only, cool only, & heat/cool single transformer system

NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is

connected between thermostat’s RH and RC terminals for proper
operation with this system.

NOTE: For three-wire heat only system, connect terminals

For cool only system, connect terminals

9

MVWRHRCGYOB6

L

KJ

M

GG

G,

GG

G, and

GG

GG

RHRH

RH.

RHRH

YY

Y,

YY

WW

W, and

WW

RHRH

RH.

RHRH

Installation

WIRING DIAGRAMSWIRING DIAGRAMS

WIRING DIAGRAMS

WIRING DIAGRAMSWIRING DIAGRAMS

1

MV 6 Y G W

A

From millivolt system

1

Millivolt System

A

Zone Valve

B

Cooling System

C

Fan Relay

D

Heating System

E

Changeover Relay Energized in

F

Cooling (Single Stage Heat
Pump System)

O B

NOTE: Thermostat must have batteries installed.

Figure 4. Typical wiring diagram for millivolt systemFigure 4. Typical wiring diagram for millivolt system

Figure 4. Typical wiring diagram for millivolt system

Figure 4. Typical wiring diagram for millivolt systemFigure 4. Typical wiring diagram for millivolt system

Changeover Relay Energized in

G

Heating (Single Stage Heat
Pump System)

Jumper Wire

H

TRANSFORMER

I

24 VAC Side

J

120 VAC Side

K

10

RC RH

MV

MVWRHRCGYOB6

Hot Side

L

Neutral Side

M

HEATING TRANSFORMER

N

COOLING TRANSFORMER

O

Jumper Wire (field-installed)

P

RH

MV 6 Y G W

O B

RC RH

1

1

2

RH

M

V

RC

3

4

Y

G

A

C D

L

KJ

I

MVWRHRCGYOB6

M

From heating system

1

From 24 VAC transformer

2

From fan relay

3

From cooling system

4

See page 10 for letter identification.

Figure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling systemFigure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling system

Figure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling system

Figure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling systemFigure 5. Typical wiring diagram for two-wire millivolt heating & three-wire cooling system

NOTE: Thermostat must have batteries installed.

11

Installation

WIRING DIAGRAMSWIRING DIAGRAMS

WIRING DIAGRAMS

WIRING DIAGRAMSWIRING DIAGRAMS

MV 6 Y G W

64

B

From zone valve

1

From 24 VAC transformer

2

(through zone valve)

Red jumper wire (provided)

3

See page 10 for letter identification.

5

21

Figure 6. Typical wiring diagram for heat only, three-wire, zone valve systemFigure 6. Typical wiring diagram for heat only, three-wire, zone valve system

Figure 6. Typical wiring diagram for heat only, three-wire, zone valve system

Figure 6. Typical wiring diagram for heat only, three-wire, zone valve systemFigure 6. Typical wiring diagram for heat only, three-wire, zone valve system

3

2

1

1

H

O B

RC RH

R

W

H

MV W RH RC G Y O B 6

L

KJ

I

M

NOTE: Thermostat must have batteries installed.
NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is

connected between thermostat’s RH and RC terminals for proper
operation with this system.

12

6

2

1

3

5

4

MV 6 Y G W

C D

From heating system

1

From 24 VAC heating transformer

2

From 24 VAC cooling transformer

3

From fan relay

4

From cooling system

5

See page 10 for letter identification.

Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer systemFigure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system

Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system

Figure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer systemFigure 7. Typical wiring diagram for heat/cool, five-wire, two-transformer system

E

Installation

O B

13

RC RH

Y

W

RH

L

MVWRHRCGYOB6

KJ

N

G

RC

M

L

KJ

O

M

WIRING DIAGRAMSWIRING DIAGRAMS

WIRING DIAGRAMS

WIRING DIAGRAMSWIRING DIAGRAMS

MV 6 Y G W

O B

HP

RC RH

2

1

RC

43

5

Y

G

C

D

F G

I

From heating system

1

Red jumper wire (provided)

2

Field-installed jumper wire

3

From fan relay

4

From cooling system

5

See page 10 for letter identification.

Figure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer systemFigure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer system

Figure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer system

Figure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer systemFigure 8. Typical wiring diagram for single stage heat pump, four-wire, single transformer system

NOTE: Ensure that RED RH/RC jumper wire (provided with thermostat) is

connected between thermostat’s RH and RC terminals for proper
operation with this system.

14

MV W RH RC G Y O B 6

L

KJ

M

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION
JUMPERSJUMPERS

JUMPERS

JUMPERSJUMPERS

Before turning power on to the
system, the jumpers on the back of
the thermostat must be configured to
operate correctly with the system
equipment.

This thermostat is configured from
the factory to operate a standard
fossil fuel (gas, oil, etc.), forced hot
air system with a single stage air
conditioning compressor and fan.
This is the correct configuration for
any system that DOES NOT require
the thermostat to energize the fan on
a call for heat.

If you have an electric heat or other
system that REQUIRES the
thermostat to control the fan, find
and cut the jumper lead labelled
W914 (see fig. 9). This will allow
the thermostat to energize the fan

instantly on a call for heat. If you
are unsure if the system requires the
thermostat to control the fan, contact
a qualified heating and air condi­tioning service person.

Clip for remote sense

1

3-pin connector

2

Clip for electric heat

3

Figure 9. Jumper locationsFigure 9. Jumper locations

Figure 9. Jumper locations

Figure 9. Jumper locationsFigure 9. Jumper locations

15

Installation

A remote sensor can be used with
this thermostat. To use a remote
sensor, jumper W922 must be
clipped (see fig. 9) and the REMT
SEN option in the configuration
menu must be set to ON.

1 32

W922

W914

CONFIGURATION MENUCONFIGURATION MENU

CONFIGURATION MENU

CONFIGURATION MENUCONFIGURATION MENU

Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS

1 EMR

TIME

2 SET CYCL HEAT

TIME

3 SET CYCL COOL

TIME

4 COOL FAN DELA OFF

TIME

5 COOL FAN DELA ON

TIME

6 COMP LOCK

TIME

7 SYSTEM

TIME

FWD

(ON)

FWD

(05)

FWD

(14)

FWD

(01)

FWD

(04)

FWD

(ON)

FWD

(HEAT-OFF-COOL-AUTO)

OFF

02 - 40

09 - 40

01 - 127

01 - 05

OFF

HEAT-OFF,

COOL-OFF,

Selects EMR option ON or OFF

Adjusts heat anticipation value (2 through 40)

Adjusts cool anticipation value (9 through 40)

Adjusts cool fan-off delay (1 through 127 sec.)

Adjusts cool fan-on delay (1 through 5 sec.)

Selects compressor lockout ON or OFF (see NOTE)

Selects system switch choices for heat only,
cool only, heat/cool or automatic changeover

HEAT-OFF-COOL

16

8 0˚F

TIME

9 (˚F) C

TIME

10 BEEP

TIME

11 REMT SEN

TIME

12

TIME

13

TIME

14

PROGRAM

FWD

FWD

FWD

FWD

FWD

FWD

(0)

(ON)

(OFF)

PART LOCK

(OFF)
LOCK

(OFF)

RUN

5 LO to

17

Installation

5 HI

OFF

ON

ON

ON

Adjusts temperature display higher or lower

Adjusts temperature display to ˚F or ˚C
Turns beeper ON or OFF

Selects remote sensor OFF or ON

Selects partial keypad lockout OFF or ON

Selects total keypad lockout OFF or ON

Returns to normal operation

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION
INSTALLERINSTALLER

INSTALLER

INSTALLERINSTALLER
CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION

The configuration settings can be
changed at any time to meet system
or personal requirements.

Press PROGRAM
certain the thermostat is in the run
program mode, then press TIME

FWD

and TIME

time to enter the configuration
menu. The display will change to
show the first option on the
configuration menu. The chart on
page 16 briefly describes each
option on the menu. Following are
more detailed descriptions of the
options recommended for selection
by the installer. For more detailed
descriptions of other options, refer
to the Operating Instructions. Make

RUN

BACK

to make

at the same

selections for each option as
required.

When the option is set to your
choice, press TIME
change the display to the next step.
To return to a previous option, press

BACK

TIME
To exit the configuration menu at

any time, press PROGRAM .

SELECTABLE ENERGYSELECTABLE ENERGY

SELECTABLE ENERGY

SELECTABLE ENERGYSELECTABLE ENERGY
MANAGEMENT RECOVERYMANAGEMENT RECOVERY

MANAGEMENT RECOVERY

MANAGEMENT RECOVERYMANAGEMENT RECOVERY

Energy Management Recovery
(EMR) causes the thermostat to start
operating the system early in order
to make the building temperature
reach the programmed setpoint at
the programmed time. In heating,
the thermostat will start 5 minutes
early for every °F difference
between the room temperature and

.

18

FWD

to

the next programmed temperature.
In cooling the thermostat uses 15
minutes per °F.

The maximum time the thermostat
can start early in heating is 75
minutes. The maximum time the
thermostat can start early in cooling
is 3 hours and 45 minutes. Cooling
can start earlier because it takes
longer to reach temperature.

ADJUSTABLEADJUSTABLE

ADJUSTABLE

ADJUSTABLEADJUSTABLE
ANTICIPATIONANTICIPATION

ANTICIPATION

ANTICIPATIONANTICIPATION

This option allows the cycle times in
heating and cooling to be increased
or decreased. The factory set values
can be adjusted higher for longer
cycles or lower for shorter cycles.

The adjustment range for HEATING
is from 2 to 40. The factory preset is

5. The adjustment range for

COOLING is from 9 to 40. The
factory preset is 14. The recom­mended initial setting for hydronic
systems is 35.

The cooling will not go below 9
because compressors require a
longer cycle.

The chart below shows how this
adjustment range affects thermostat
performance.

Anticipation Value Cycle Length Differential Temperature Cycle Length Differential Temperature

Hydronic Longer21–40 1.0–1.6 F (0.6–0.9 C) 1.0–1.6 F (0.6–0.9 C)

These numbers are approximate and represent operation with a typical system. Actual temperature differentials and
run times may vary widely based on your building and equipment, as well as outdoor temperature conditions.

PROGRAMMABLE COOLPROGRAMMABLE COOL

PROGRAMMABLE COOL

PROGRAMMABLE COOLPROGRAMMABLE COOL
FAN-ON AND FAN-OFFFAN-ON AND FAN-OFF

FAN-ON AND FAN-OFF

FAN-ON AND FAN-OFFFAN-ON AND FAN-OFF
DELAYDELAY

DELAY

DELAYDELAY

This option allows a selection of a
fan-on delay of 1 to 5 seconds on a
call for cool and 1 to 127 seconds of
fan-off delay after the thermostat
has satisfied the call for cool.

A short delay to allow the A-coil to
cool off before the fan turns on may

HEATING COOLING

Shorter 0.4–0.6 F (0.2–0.3 C) N/A2–8 N/A
Longer Shorter9–20 0.6–1.0 F (0.3–0.6 C) 0.6–1.0 F (0.3–0.6 C)

19

be preferred. This also allows the
compressor and the fan to come on
at slightly different times, which
allows full power to the compressor
on start up.

The fan off delay allows the fan to
continue running after the compres­sor has shut off. This distributes the
cooling that would otherwise stay
trapped in the air conditioning coils
through the ducts. Ideally the timing

Installation

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION

would be set so the fan shuts off just
as the cool air is exhausted. If this
timing is set too long the fan may
begin blowing warm air before it
shuts off. Shortening the fan-off
delay will prevent this.

COMPRESSOR LOCKOUTCOMPRESSOR LOCKOUT

COMPRESSOR LOCKOUT

COMPRESSOR LOCKOUTCOMPRESSOR LOCKOUT

This thermostat is designed to
protect the system against premature
compressor failure by “locking out”
the compressor for at least five
minutes after each cycle. When the
thermostat is in compressor lockout,
the word COOL will flash on the
display. During this period, the
compressor will not be energized.

If the system has short-cycle
protection, this feature can be
disabled.

Lockout Bypass Option

FOR QUALIFIED SERVICE
TECHNICIANS’ USE ONLY.
HOMEOWNERS SHOULD
NOT USE THIS FEATURE
DUE TO POSSIBILITY OF
EQUIPMENT OR PROPERTY
DAMAGE, OR PERSONAL
INJURY.

DISABLING HEAT, COOLDISABLING HEAT, COOL

DISABLING HEAT, COOL

DISABLING HEAT, COOLDISABLING HEAT, COOL
OR AUTO MODESOR AUTO MODES

OR AUTO MODES

OR AUTO MODESOR AUTO MODES

The automatic changeover feature of
this thermostat can be disabled
(automatic changeover allows the
thermostat to switch between
heating and cooling to maintain
temperature). If this thermostat is
controlling a heating-only or
cooling-only system, the heat, cool,
or auto modes can be disabled.

20

COMPRESSOR SHORT TERM
CYCLE PROTECTION

This thermostat has a built-in
short term (5-minute) time delay.
During this 5-minute period, the
thermostat will lock out the
compressor to allow head
pressure to stabilize. To override
this feature for one cycle while
testing thermostat operation,
press SET
buttons at the same time.

OPTIONAL REMOTEOPTIONAL REMOTE

OPTIONAL REMOTE

OPTIONAL REMOTEOPTIONAL REMOTE
TEMPERATURE SENSETEMPERATURE SENSE

TEMPERATURE SENSE

TEMPERATURE SENSETEMPERATURE SENSE

An optional remote sensor (part #
F145-1328) can be attached to this
thermostat and may be wired as far
away as 200 feet. The thermostat
will use the temperature in the
remote location as its room

TIME

and SET

DAY

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT OPERATION

temperature display.
This is an excellent feature if the

thermostat is in a poor location for
sensing temperature or the thermo­stat is in a separate room to prevent
tampering.

NOTE

The remote sense feature will not
work if the system does not
provide 24V to the thermostat
(example: millivolt heating-only
systems or 3-wire zone valves).

To use a remote sensor, jumper
W922 must be clipped (see figure 9)

After the thermostat is installed and
configured, do the following to
ensure proper operation.

FAN OPERATIONFAN OPERATION

FAN OPERATION

FAN OPERATIONFAN OPERATION

If your system does not have a G
terminal connection, skip to
“Heating System” section.

1. Turn power on to the system.

2. Press
displayed. The fan should begin
to operate.

3. Press
is displayed. The fan should stop
operating.

and the REMT SEN option in the
configuration menu must be set to
ON.

Installation

FAN

until FAN ON is

FAN

until F AN AUTO

21

HEATING SYSTEMHEATING SYSTEM

HEATING SYSTEM

HEATING SYSTEMHEATING SYSTEM

1. Press

SYSTEM

until HEA T is

displayed. If the heating system
has a standing pilot, ensure that it
is lit.

2. Press to adjust thermostat
setting above room temperature.
The heating system should begin
to operate.

3. Press

to adjust temperature
below room temperature. The
heating system should stop
operating.

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT OPERATION
COOLING SYSTEMCOOLING SYSTEM

COOLING SYSTEM

COOLING SYSTEMCOOLING SYSTEM

WARNING

!

To prevent compressor and/
or property damage, if the
outdoor temperature is below
50°F (10°C), DO NOT
operate the cooling system.

1. Press

SYSTEM

until COOL is

displayed.

2. Press to adjust thermostat
setting below room temperature.
The fan should come on (after
the fan-on delay time, if any),
followed by cold air circulation.

3. Press

to adjust temperature
setting above room temperature.
The cooling system should stop
operating, and the fan should
stop running (after the fan-off

RESETTING THERMOSTATRESETTING THERMOSTAT

RESETTING THERMOSTAT

RESETTING THERMOSTATRESETTING THERMOSTAT

The thermostat can be reset back to
factory default programs and
configuration options. Removing
power from the thermostat will not
reset it to the default settings. Before
resetting the thermostat, you may
want to make note of the previously
selected configuration options and
programming.

To reset the thermostat, press and
release PROGRAM
press the

will reset the thermostat to factory
default programs and configuration.
The display will momentarily go
blank, then all segments on the
display will momentarily be shown.
The thermostat will then go into the

delay time, if any).

RUN

, then

FAN

, TIME

BACK

and

buttons at the same time. This

22

HOLD mode and will maintain
factory preset temperatures.

CONFIGURATION

The configuration menus allow you
to set certain thermostat operating
characteristics to your system or
personal requirements.

To enter the User Configuration menu,
press PROGRAM
the thermostat is in the run program
mode, then press TIME

BACK

TIME

the configuration menu. The display will
show the first item in the configuration
menu.

RUN

to make sure

FWD

and

at the same time to enter

The following chart (pages 24 & 25)
describes each item on the menu and the
applicable model(s). Set these according
to your personal preference. To exit the
menu, press PROGRAM

RUN

. To

return to the menu at any time press

PROGRAM

FWD

RUN

and TIME

, then press TIME

BACK

at the same

time. While in the configuration menu,
if you do not press any buttons for two
minutes, the thermostat will revert to
normal operation.

23

Configuration

You should contact a qualified service
person to change items that are
indicated “Recommend Installer
Setting”.

Operator may change shaded options if
desired. We recommend that other
options be set by the installer.

CONFIGURATION MENUCONFIGURATION MENU

CONFIGURATION MENU

CONFIGURATION MENUCONFIGURATION MENU

Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS

1 EMR

TIME

2 SET CYCL HEAT

TIME

FWD

(ON)

FWD

OFF

Recommend installer setting

Selects EMR option ON or OFF

3 SET CYCL COOL

TIME

4 COOL FAN DELA OFF

TIME

5 COOL FAN DELA ON

TIME

6 COMP LOCK

TIME

7 SYSTEM

TIME

FWD

FWD

FWD

FWD

FWD

Recommend installer setting

Recommend installer setting

Recommend installer setting

Recommend installer setting

Recommend installer setting

24

8 0˚F

TIME

9 (˚F) ˚C

TIME

10 BEEP

TIME

11 REMT SEN

TIME

FWD

(0)

FWD

FWD

(ON)

FWD

5 LO to

5 HI

OFF

Recommend installer setting

Adjusts temperature display higher or lower

Adjusts temperature display to ˚F or ˚C
Turns beeper ON or OFF

12

TIME

13

TIME

14

PROGRAM

FWD

FWD

RUN

PART LOCK

(OFF)
LOCK

(OFF)

ON

ON

25

Configuration

Selects partial keypad lockout OFF or ON

Selects total keypad lockout OFF or ON

Returns to normal operation

PROGRAMMING

MANUAL OPERATIONMANUAL OPERATION

MANUAL OPERATION

MANUAL OPERATIONMANUAL OPERATION

Your Comfort-Set 90 thermostat can
be used to control temperature
manually (without programming).
For manual operation, press
to select

HEATHEAT

HEAT or

HEATHEAT

press PROGRAM

COOLCOOL

COOL, then

COOLCOOL

HOLD

or to set the tempera-

ture as desired.

PROGRAMMED OPERATIONPROGRAMMED OPERATION

PROGRAMMED OPERATION

PROGRAMMED OPERATIONPROGRAMMED OPERATION
Planning Your ProgramPlanning Your Program

Planning Your Program

Planning Your ProgramPlanning Your Program

The sample schedule (pages 28 &

29) 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
thermostat

SYSTEM

RUN

set to

SYSTEM

. Use

with the

HeatHeat

Heat,

HeatHeat

CoolCool

Cool, or

CoolCool

AutoAuto

Auto.

AutoAuto

Fill out the blank schedules (pages
30 & 31) 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.

Entering Your ProgramEntering Your Program

Entering Your Program

Entering Your ProgramEntering Your Program
To Set the ClockTo Set the Clock

To Set the Clock:

To Set the ClockTo Set the Clock

1. Press PROGRAM

2. Press SET

TIME

RUN

.

. The display

will show the hour. Use TIME

FWD

or TIME

BACK

to set to the
current hour and AM/PM designa­tion.

26

3. Press SET

TIME

again. The

display will show minutes. Use

TIME

FWD

or TIME

BACK

to set

to the current minutes.

DAY

. The display

RUN

.

4. Press PROGRAM

To Set the DayTo Set the Day

To Set the Day:

To Set the DayTo Set the Day

5. Press SET
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

To Set the ProgramTo Set the Program

To Set the Program:

To Set the ProgramTo Set the Program

7. Press

SYSTEM

(for heating program) or

RUN

to select

.

HEATHEAT

HEAT

HEATHEAT

COOLCOOL

COOL (for

COOLCOOL

cooling program).

8. Press PROGRAM
time. The display will show

VIEW

one

MORMOR

MOR

MORMOR

and the settings for time and
temperature.

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.

/DA Y 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,

HOLD

press

/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

BACK

to set the time on the display

FWD

or TIME

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

button to adjust the tempera­ture to match your schedule. If you
want the fan ON continuously

VIEW

FAN

.

one

during this period, press

12.Press PROGRAM
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

27

Programming

you are satisfied that your program
matches your schedule, press

PROGRAM

RUN

. Programming
is now complete for this mode and
your program is running.

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

7 Day Sample HEAT Program Schedule
(Shows factory programming)

MON

TUE
WED
THU

FRI

SAT
SUN

1

Morning (MOR)

2

Day (DAY)

3

Evening (EVE)

4

Night (NHT)

5

Start Time

6

Temperature

6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)
6:00 AM 70°F (21°C) 8:00 AM 70°F (21°C)

1

2 3 4

5 6 5 6 5 6 5 6

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)

28

5:00 PM 10:00 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

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)

7 Day Sample COOL Program Schedule
(Shows factory programming)

MON

TUE
WED

THU

FRI

SAT
SUN

1

Morning (MOR)

2

Day (DAY)

3

Evening (EVE)

4

Night (NHT)

5

Start Time

6

Temperature

6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)
6:00 AM 78°F (25°C) 8:00 AM 78°F (25°C)

1

2 3 4

5 6 5 6 5 6 5 6

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)

29

5:00 PM 10:00 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

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)

Programming

7 Day Personal HEAT
Program Schedule

MON

TUE
WED

THU

FRI

SAT
SUN

1

Morning (MOR)

2

Day (DAY)

3

Evening (EVE)

4

Night (NHT)

5

Start Time

6

Temperature

1

2 3 4

5 6 5 6 5 6 5 6

30

7 Day Personal COOL
Program Schedule

MON

TUE
WED

THU

FRI

SAT
SUN

1

Morning (MOR)

2

Day (DAY)

3

Evening (EVE)

4

Night (NHT)

5

Start Time

6

Temperature

1

2 3 4

5 6 5 6 5 6 5 6

31

Programming

FEATURES

Large Lighted LiquidLarge Lighted Liquid

Large Lighted Liquid

Large Lighted LiquidLarge Lighted Liquid
Crystal Display (LCD).Crystal Display (LCD).

Crystal Display (LCD).

Crystal Display (LCD).Crystal Display (LCD).

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. The display
light uses power from the 3 “AA”
alkaline batteries installed. Exces­sive use of the display light will
reduce battery life.

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.

Setpoint RangeSetpoint Range

Setpoint Range

Setpoint RangeSetpoint Range
45-99°F (7-37°C).45-99°F (7-37°C).

45-99°F (7-37°C).

45-99°F (7-37°C).45-99°F (7-37°C).

You may set your thermostat to any
temperature from 45° to 99°F. If you
prefer, you may configure the
thermostat to display Celsius. This
is covered in the CONFIGURA­TION section (page 25, step 9).

Selectable EnergySelectable Energy

Selectable Energy

Selectable EnergySelectable Energy
Management Recovery (EMR).Management Recovery (EMR).

Management Recovery (EMR).

Management Recovery (EMR).Management Recovery (EMR).

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 heating, the
thermostat will start 5 minutes early
for every 1°F difference between the

32

room temperature and the next
programmed temperature. In
cooling, 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 25 minutes early. The
difference between the room
temperature (65°F) and the setpoint
(70°F) is 5°. 5° X 5 minutes per °F
= 25 minutes. The setpoint on the
display will actually change to
display 70° about 25 minutes early.

The maximum time the thermostat
can start early in heating is 75
minutes. The maximum time the
thermostat can start early in cooling

is 3 hours and 45 minutes. Cooling
can start earlier because it takes
longer for cooling systems to reach
the desired temperature.

To select or deselect this feature,
refer to the CONFIGURATION
section (page 24, step 1).

AdjustableAdjustable

Adjustable

AdjustableAdjustable
Temperature Display.Temperature Display.

Temperature Display.

Temperature Display.Temperature Display.

The room temperature display can
be adjusted to read higher or lower
by following the configuration 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 section (page 25, step 8).

Factory PreprogrammedFactory Preprogrammed

Factory Preprogrammed

Factory PreprogrammedFactory Preprogrammed
Times and Temperatures.Times and Temperatures.

Times and Temperatures.

Times and Temperatures.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 PROGRAM

Arm Chair Programming.Arm Chair Programming.

Arm Chair Programming.

Arm Chair Programming.Arm Chair Programming.

RUN

.

The thermostat uses 24 VAC power
supplied by the system for normal
operation. However, if the installed
“AA” batteries are providing

33

sufficient power, you can program
the thermostat away from the wall.
If the thermostat indicates low
battery power (CHECK BAT-
TERY), refer to the Battery Back-up
feature (page 37).

Programmable Fan Control.Programmable Fan Control.

Programmable Fan Control.

Programmable Fan Control.Programmable Fan Control.

This feature allows you to have your
fan operate continuously through
one or more programmed time
periods. This is useful if you want to
have constant air circulation in your
location during a specific time
period. If you do not use this
feature, the fan will cycle normally
with the heating and cooling system.

Automatic Changeover.Automatic Changeover.

Automatic Changeover.

Automatic Changeover.Automatic Changeover.

If you have a heating/cooling
system, the thermostat can be set to
automatically switch the system

Features

from heating to cooling as needed.
To set your thermostat to this
operating mode, press

SYSTEM

button until AUTO is displayed on
the screen.

Pressing the and
buttons at the same time will change
the setpoint temperature displayed
to the setpoint of the other mode.
This will allow you to modify both
the HEAT and COOL setpoints to
accommodate a HOLD condition
while in Automatic Changeover
mode.

Air FilterAir Filter

Air Filter

Air FilterAir Filter
Change-Out Indicator.Change-Out Indicator.

Change-Out Indicator.

Change-Out Indicator.Change-Out Indicator.

This feature allows the thermostat to
display the words CHNG FLTR
(change filter) after a set time of fan
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

00 will cancel this feature.

When CHNG FLTR is displayed,
you can clear it by pressing the
FILTER button. 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 you see CHNG FLTR on the
display, press the FILTER button
once to reset the timer. If you do not
see CHNG FLTR proceed to step 2.

When the FILTER button is pressed

34

once, the display will show the
number of hours remaining before
CHNG FLTR indicator will
display.

2. Press the FILTER button. The
display will show SET FILTER
TIME and will show the number of
hours to filter change.

3. Press TIME

BACK

to change the time to your

FWD

or TIME

requirements.

4. Press PROGRAM

RUN

to

return to the normal operating mode.
NOTE: If unsure what interval to

use between filter changes or
cleaning, contact the manufacturer
of your heating/cooling equipment.

Temporary Program Override.Temporary Program Override.

Temporary Program Override.

Temporary Program Override.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 tempera-

ture you want is displayed. The
display will indicate HOLD, and the
number of hours remaining in the
hold period will be 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

BACK

buttons until you reach the

FWD

or TIME

time you would like it to resume the
program. The TIME

BACK

TIME

buttons adjust the time

FWD

or

in 15 minute increments. This
programmed hold time has a 19
hour maximum and 15 minute
minimum. Beyond 19 hours you
may wish to use the vacation hold

feature (page 36). If you need to,
you can adjust the temperature up or
down.

Indefinite Program Hold.Indefinite Program Hold.

Indefinite Program Hold.

Indefinite Program Hold.Indefinite Program Hold.

If you want to operate the thermo­stat to keep a set temperature
without a program running, press

PROGRAM

HOLD

. The or

buttons can be use to raise or
lower the temperature. The
thermostat will hold the set
temperature until you return to the
program by pressing PROGRAM

RUN

.

Thermostat StartupThermostat Startup

Thermostat Startup

Thermostat StartupThermostat Startup
After Total Power Loss.After Total Power Loss.

After Total Power Loss.

After Total Power Loss.After Total Power Loss.

On installation, or when power is
restored after a total power loss to
the thermostat, your thermostat will
automatically maintain a heating

35

temperature of 62°F (16°C) and a
cooling temperature of 85°F (29°C).
A total loss of power will occur
when you lose 24 VAC power to the
thermostat, and you have no battery
backup. If this happens, the
thermostat display will go blank in
about one minute after power loss.

When power is restored, the
thermostat will automatically return
to the temperatures listed above. If
this happens, set the clock and day
of the week (use steps 1 through 6
from “Entering Y our Program”,
page 26), then select HEAT, COOL
or AUTO using the
and press PROGRAM

SYSTEM

. button,

RUN

to

resume operation with your
previously set program.

Features

Daylight Savings Time Button.Daylight Savings Time Button.

Daylight Savings Time Button.

Daylight Savings Time Button.Daylight Savings Time Button.

One button adjustment allows you to
change your thermostat clock
between Standard Time and
Daylight Savings time. Simply push
the DAYLIGHT SAVINGS TIME
button to advance the time forward
one hour in the Spring. In the Fall,
press the DAYLIGHT SAVINGS
TIME button twice to fall back an
hour. If you push it three times in a
row (in less than 30 seconds) it will
return to the original time setting.
After clock adjustment, press
PROGRAM

RUN

to resume your

normal program.

Programmable Vacation Time/Programmable Vacation Time/

Programmable Vacation Time/

Programmable Vacation Time/Programmable Vacation Time/
Temperature Operation.Temperature Operation.

Temperature Operation.

Temperature Operation.Temperature Operation.

The VACATION button allows you
to program the thermostat to hold a
constant temperature for 1 to 29

days. At the end of the day and time
you select, the thermostat will return
to normal program operation.

To program the number of days,
press VACATION. V A CA HOLD
TILL will be displayed. The display
will also show DA YS (flashing) and
the number 5. To change the number
of vacation days, press TIME
or TIME

BACK

. Press or

FWD

to set the temperature you
wish to maintain while away. While
still in the vacation mode, set the
time you want the program to
resume by pressing SET

TIME

once. The current time will display.

FWD

Press TIME

to adjust the
time in 15 minute increments. You
may wish to select a few hours in
advance of your expected return to
allow time to reach the desired

36

temperature. Your thermostat is now
programmed to hold the temperature
you selected through your vacation
for HEAT, COOL, or AUTO.

After 20 seconds the display will
return to time/temperature alterna­tion, and will display VACA.
Pressing VACATION again will
activate the vacation mode settings.
Pressing PROGRAM

RUN

cancels
this feature and begins running your
normal program.

Keypad Lockout.Keypad Lockout.

Keypad Lockout.

Keypad Lockout.Keypad Lockout.

This security feature allows you to
lock out the keypad 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 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 two hours or the
number of hours you specify if you
set up your Hold Till timing (see
Temporary Program Override (page

34). To select or deselect this
feature, refer to the CONFIGURA­TION section (page 25, steps 12 and

13).

Battery Back-Up.Battery Back-Up.

Battery Back-Up.

Battery Back-Up.Battery Back-Up.

Three “AA” alkaline batteries allow
the thermostat to maintain its

program in the event of a power
loss. They also operate the back
light for viewing the display in low
light conditions, and allow for
armchair programming.

CHECK BATTERY will be
displayed when the batteries are
low. To assure optimum perfor­mance, change batteries once a year
or when CHECK BATTERY is
displayed. When changing batteries,
always replace all three batteries
with new “AA” alkaline batteries
(for optimum performance, we
recommend Energizer

®

batteries). If
the batteries must be changed
frequently, it may indicate a
problem with the system. Contact
the heating/cooling system manufac­turer or a service person. Remember
that excessive use of the display

37

light will reduce battery life.

System andSystem and

System and

System andSystem and
Thermostat Diagnostics.Thermostat Diagnostics.

Thermostat Diagnostics.

Thermostat Diagnostics.Thermostat Diagnostics.

The display will indicate CHECK
SYSTEM if the room temperature

does not rise within two hours of the
call for heat. After two hours the
thermostat will quit calling for heat
for one minute (this allows some
furnaces to reset) and call for heat
again. It will repeat this sequence
three times. If the temperature still
does not rise, it will continue to call
for heat. This normally indicates the
heating system is not working
correctly. You may wish to consult
your furnace manufacturer or
service person.

The display will indicate CHECK
ST AT if one of the following occurs.

Features

• One of the buttons is stuck down
or in. Check buttons, make sure
nothing is pushing them in.

• The thermostat sensor is not
functioning. If using a remote
sensor, check connections, wiring
and power.

After checking the above, press
PROGRAM

RUN

to reset the
display. If this does not clear the
display, disconnect power and
remove the batteries for five
minutes.

If these checks fail to solve the
problem, the thermostat should be
replaced.

CompressorCompressor

Compressor

CompressorCompressor
Short-Cycle Protection.Short-Cycle Protection.

Short-Cycle Protection.

Short-Cycle Protection.Short-Cycle Protection.

Your thermostat is designed to
protect your system against

premature compressor failure by
“locking out” the compressor. This
ensures that the compressor will stay
off for at least five minutes on each
cycle. When the thermostat is in
compressor lock-out, the word
COOL will flash. During this
period, the compressor will not be
energized.

INDEX

Adjustable T emperature Display 33
Air Filter Change-out Indicator 34
Arm Chair Programming -------- 33
Automatic Changeover --------- 33
Battery Back-Up ------------------ 37
COMPONENTS ------------------- 2

Thermostat Buttons ------------ 2

Display --------------------------- 3
Compressor Short-Cycle
Protection -------------------------- 38
CONFIGURATION -------------- 23
Configuration Menu Chart ------ 24
Copy-------------------------------- 27
Daylight Savings Time Button-- 36
Energy Management Recovery - 32

Fan Control, Programmable----- 33
Factory Preprogrammed --------- 33
FEATURES ----------------------- 32
INTRODUCTION----------------- 1
Keypad Lockout ------------------ 36
Liquid Crystal Display----------- 32
Operation

Manual -------------------------- 26
Programmed-------------------- 26

Program

Entering Y our ------------------ 26
Indefinite Hold----------------- 35
Planning Y our ------------------ 26

Temporary Override ----------- 34
INSTALLATION ------------------ 4
ORIENTATION-------------------- 2

PROGRAMMING --------------- 26
Schedule

Sample Programs -------------- 28
Personal Programs------------- 30

Set

Clock ----------------------------26
Day ------------------------------ 26

Program ------------------------- 26
Setpoint Range-------------------- 32
System and Thermostat

Diagnosis ----------------------- 37
Thermostat Startup After Total

Power Loss --------------------- 35
Vacation ----------------------------36

37-6438A

0225

Index

NOTES

The Emerson logo is a
trademark and service mark
of Emerson Electric Co.

White-Rodgers is a division

of Emerson Electric Co.

Printed in U.S.A.

PART NO. 37-6438A

0223