Emerson 1F92 User Manual

UniversalUniversal

Universal

UniversalUniversal
Multi-StageMulti-Stage

Multi-Stage

Multi-StageMulti-Stage
Heat PumpHeat Pump

Heat Pump

Heat PumpHeat Pump

Digital 5/2 Day
Programmable

90 Series90 Series

90 Series

90 Series90 Series

PREMIUM

OperOper

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Oper

OperOper
1F921F92

1F92

1F921F92

Retain for Future Use

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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 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.

Introduction

Orientation

Adaptable to most 24 volt
residential forced air, multi­stage or heat pump systems
with electric or fossil fuel
auxiliary (1F92-371).

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

Installation instructions begin

Instructions for optional
thermostat configuration
begin on page 23. Program­ming information begins on
page 26. Descriptions of the
thermostat’s features begin on
page 30.

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

on page 4.

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 multi-color indicator glows:
green for 1st stage, yellow for 2
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.

6

Used with TIME

BACK

to set the clock.

FWD

nd

/TIME

stage,

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 or advance to the
next day in programming mode.

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 reset the filter change timer.

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.

THE DISPLAYTHE DISPLAY

THE DISPLAY

THE DISPLAYTHE DISPLAY

18

Displays system mode (

EMER,EMER,

OFF OFF

OFF,

OFF OFF

COOLCOOL

COOL,

COOLCOOL

EMER,

EMER,EMER,

VACAVACA

or

VACA). During programming

VACAVACA

displays the time period (

EVE, NHTEVE, NHT

EVE, NHT) being programmed.. In the

EVE, NHTEVE, NHT

HEAHEA

HEA

HEAHEA

AA

UTUT

OO

HOLDHOLD

A

UT

O,

HOLD,

AA

UTUT

OO

HOLDHOLD

MOR, DAY,MOR, DAY,

MOR, DAY,

MOR, DAY,MOR, DAY,

TT

T,

TT

configuration menu, the menu item
name is shown, one word at a time

PRGMPRGM

MODEMODE

EMREMR

COOLCOOL

(

PRGM

MODE,

PRGMPRGM

DELADELA

OFFOFF

DELA

OFF, etc.).

DELADELA

OFFOFF

18 18

EMR,

MODEMODE

EMREMR

19

CHECK BATTERY STAT SYSTEM

MON

COOL

COOLCOOL

20

°F

AM

FANFAN

FAN

FANFAN

FAN AUTOHRS

21

19

CHECK STATCHECK STAT

CHECK STAT appears when the

CHECK STATCHECK STAT

thermostat detects certain problems
within itself.

CHECK SYSTEMCHECK SYSTEM

CHECK SYSTEM

CHECK SYSTEMCHECK SYSTEM

appears when the thermostat detects
certain problems in heating or cooling
the system.

20

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

21

CHECK BATTERY

MON WED THU FRI SAT SUNTUEWED THU FRI SAT SUNTUE

PRG

HRS

FAN ON

HEATHEAT

°F

AM

25

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. Displays

PRPR

G FG F

AN ON AN ON

PR

G F

AN ON when fan is pro-

PRPR

G FG F

AN ON AN ON

grammed to be on during a period.

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.

2324

Orientation

22

Figure 1. The Display

3

INSTALLATION

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

1F92-371:

5/2 Day programming;
residential applications

ELECTRICAL DATAELECTRICAL DATA

ELECTRICAL DATA

ELECTRICAL DATAELECTRICAL DATA

Electrical Rating:

20 to 30 VAC, 50/60 Hz with
common

0.05 to 1.5 Amps per terminal

2.5 Amps maximum total load (all
terminals combined)

Standard Systems:

Multi-stage gas, oil, electric.
Single-stage or two-stage compres-

sor heat pump.

THERMAL DATATHERMAL DATA

THERMAL DATA

THERMAL DATATHERMAL DATA

Setpoint Temperature Range:

45° to 99°F (7° to 37°C)

4

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 149°F (-20° to 65°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.

with a low voltage system. Do not
use on a line voltage system.

5

Installation

Do not exceed ratings shown in the
Specifications section, above. 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.This thermostat is intended for use

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 new thermo­stat is 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.

Mounting screws

1

Pull wires through this opening

2

Insert wires into terminal holes, then tighten screws

3

Screw anchors

4

Installation

2

1

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

Figure 1. Thermostat base and terminals

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

PH D SASBSCOTL

W3A1E2

RCEW2W1Y2Y1BOG

P

7

4

3

1

MULTI-STAGE TERMINAL OUTPUTSMULTI-STAGE TERMINAL OUTPUTS

MULTI-STAGE TERMINAL OUTPUTS

MULTI-STAGE TERMINAL OUTPUTSMULTI-STAGE TERMINAL OUTPUTS

Refer to equipment manufacturers’
instructions for specific system
wiring information.

You can configure the thermostat for
use with either multi-stage electric
heat systems or multi-stage gas
systems. When configured for
electric heat, the G terminal
(blower/fan) will be energized on a
call for heat.

This thermostat is designed to
operate a single-transformer system.
If you have a two-transformer
system, cut and tape off one
transformer. If transformer safety
circuits are in only one of the
systems, remove the transformer of
the system with NO safety circuits. If
required, replace remaining trans­former with a 75VA Class II
transformer. After disconnecting one

Use the terminal output information
below to help you wire the thermo­stat properly for your multi-stage
system. After wiring, see CON-
FIGURATION section for proper
thermostat configuration.

transformer, the two commons must
be jumpered together.

THERMOSTTHERMOST

THERMOST

THERMOSTTHERMOST

Malfunction Light Not Used

SYSTEM E C R W3/A1 W2 E2/P W1 Y2 Y1 B O G

Multi-Stage No function 24 Volt 24 Volt Not Used Heat mode No function Heat mode Cool mode Cool mode Energized in Energized in Blower/Fan

AA

T T

TERMINTERMIN

A

T

TERMIN

AA

T T

TERMINTERMIN

LPH

ALS (Upper)ALS (Upper)

ALS (Upper)

ALS (Upper)ALS (Upper)

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

(Common) (Hot) 2nd stage 1st stage 2nd stage 1st stage Heat & Of f Cool mode Energized on

mode call for Cool*

8

* (and Heat if configured to Electric Heat)

HEAT PUMP TERMINAL OUTPUTSHEAT PUMP TERMINAL OUTPUTS

HEAT PUMP TERMINAL OUTPUTS

HEAT PUMP TERMINAL OUTPUTSHEAT PUMP TERMINAL OUTPUTS

Refer to equipment manufacturers’
instructions for specific system
wiring information.

You can configure the thermostat for
use with the following heat pump
system types:

HEAT PUMP TYPE 1. Single­stage compressor system; gas or
electric backup.

HEAT PUMP TYPE 2. Multi-stage
or two-compressor system; gas or
electric backup.

HEAT PUMP TYPE 3. System
requiring separate signals for heat
(W1, W2) and cool (Y1); gas or
electric backup.

This thermostat is designed to
operate a single-transformer system.
If you have a two-transformer
system, cut and tape off one
transformer. If transformer safety
circuits are in only one of the
systems, remove the transformer of
the system with NO safety circuits. If
required, replace remaining trans­former with a 75VA Class II
transformer. After disconnecting one
transformer, the two commons must
be jumpered together.

Installation

Use the terminal output information
on the next page to help you wire
the thermostat properly for your
heat pump system type. After
wiring, see CONFIGURATION
section for proper thermostat
configuration.

9

HEAT PUMP TERMINAL OUTPUTSHEAT PUMP TERMINAL OUTPUTS

HEAT PUMP TERMINAL OUTPUTS

HEAT PUMP TERMINAL OUTPUTSHEAT PUMP TERMINAL OUTPUTS

THERMOSTTHERMOST

THERMOST

THERMOSTTHERMOST

AA

T T

A

T

AA

T T

TERMINTERMIN

TERMIN

TERMINTERMIN

ALS (Upper)ALS (Upper)

ALS (Upper)

ALS (Upper)ALS (Upper)

LPH

Malfunction Light Not Used

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

SYSTEM E C R W3/A1 W2 E2/P W1 Y2 Y1 B O G

Single-stage compressor system; gas or electric backup

Heat Pump 1* Emergency 24 Volt 24 Volt Not Used Heat mode E2=Emer- Heat mode No output Hea t and Energized in Energized in Blower/Fan

mode (Common) (Hot) 3rd stage. gency mode 2nd stage Cool mode He at, Off Cool mode Energized on

1st stage Emergency constant 1st stage Emergency call for Heat

mode output. (compressor) mode and Cool

2nd stage P=All other

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

modes

constant

output

SYSTEM E C R W3/A1 W2 E2/P W1 Y2 Y1 B O G

Multi-stage or two compressor system; gas or electric backup

Heat Pump 2* Emergency 24 Volt 24 Volt Not Used Emergency E2=Emer- Heat mode Heat and Heat and Energized in Energized in Blower/Fan

* If system does not provide connection to E, jumper W1 to E to provide Aux heating in emergency mode.

mode (Common) (Hot) mode gency mode 3rd stage Cool mode Cool mode Heat, Off Cool mode Ener gized on

1st stage 2nd stage constant 2nd stage 1st stage Emergency call for Heat

output. (compressor (compressor mode and Cool

P=All other 2) 1)

modes

constant

output

10

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)

THERMOSTAT TERMINALS (Lower)THERMOSTAT TERMINALS (Lower)

SYSTEM E C R W3/A1 W2 E2/P W1 Y2 Y1 B O G

System requiring separate signals for heat (W1, W2) and cool (Y1); gas or electric backup

Heat Pump 3** Emergency 24 Volt 24 Volt Not Used Heat mode E2=Emer- Heat mode No Output Cool mode Energized in Energized in Blower/Fan

** If system does not provide connection to E, jumper W2 to E to provide Aux heating in emergency mode.

mode (Common) (Hot) 2nd stage. gency mode 1st stage 1st stage Heat, Off Cool mode Energized on

1st stage Emergency constant Emergency call for Heat

mode output. mode and Cool

2nd stage P=All other

modes

constant

output

11

Installation

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION
SWITCHESSWITCHES

SWITCHES

SWITCHESSWITCHES
RESET SWITCHRESET SWITCH

RESET SWITCH

RESET SWITCHRESET SWITCH

See the Troubleshooting section at the end of
this document for more information about the
function of this switch.

E2/P SWITCHE2/P SWITCH

E2/P SWITCH

E2/P SWITCHE2/P SWITCH

The E2/P switch is located on the back of the
thermostat body (see fig. 2). This switch
controls how the E2/P terminal of the
thermostat will be energized. When the switch
is in the E2 position (down), the E2/P
terminal will be energized only when in
emergency heat. When the switch is in the P
position (up), the E2/P terminal will always
be energized except when in emergency heat.
Consult the equipment manufacturer or a
qualified heating/cooling service person
before setting this switch. If your system has
no connection to E2/P, no change in the
switch setting is required.

S18

S19

P

E2

Reset switchReset switch

Reset switch

Reset switchReset switch

1

Figure 2. Switch locations on back of thermostat bodyFigure 2. Switch locations on back of thermostat body

Figure 2. Switch locations on back of thermostat body

Figure 2. Switch locations on back of thermostat bodyFigure 2. Switch locations on back of thermostat body

12

E2/P switchE2/P switch

E2/P switch

E2/P switchE2/P switch

2

1

2

INSTALLER CONFIGURATIONINSTALLER CONFIGURATION

INSTALLER CONFIGURATION

INSTALLER CONFIGURATIONINSTALLER CONFIGURATION

BEFORE TURNING POWER
ON, please read the following
instructions. Before operating the
system, you must configure the
thermostat to operate properly
with your equipment.

The thermostat, as it comes from the
factory, is configured to operate a

standard multi-stage electric
forced hot air system with a single
stage air conditioning compressor

and fan. In this configuration, the
thermostat will turn on the fan
immediately on a call for heat. If
you are unsure whether your system
requires the thermostat to control
the fan, contact your furnace/air
conditioning system manufacturer or
a qualified heating/air conditioning
service person.

Installation

Your new thermostat has an Installer
menu, which allows you to custom­ize the thermostat to meet your
requirements.

(The thermostat also has a User

menu and a Keypad Lockout
menu; these menus are explained

further in the CONFIGURATION
section.)

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

ENTERING THEENTERING THE

ENTERING THE

ENTERING THEENTERING THE
CONFIGURATION MENUSCONFIGURATION MENUS

CONFIGURATION MENUS

CONFIGURATION MENUSCONFIGURATION MENUS

After properly wiring the thermo­stat, turn on power to the system.
Momentarily press PROGRAM

RUN

to make certain the thermo-

stat is in the run program mode,

13

then press TIME

BACK

at the same time to enter the

FWD

and TIME

User Configuration menu. When the
display changes to the first item in
the configuration menu, release the
buttons. Then press and hold SET

TIME

and SET

DAY

for approxi-

mately 3 seconds to enter the
Installer menu. The display will
change to show the first item on the
Installer menu (multi-stage/heat
pump selection). Use the following
text, along with the Installer table
on page 16, to guide you through
the menu.

Once in the menu, you set each item
to the proper selection using
or , then press TIME

FWD

change the display to the next item
or TIME

BACK

to return to the

previous item.

to

INSTALLER CONFIGURATION (cont.)INSTALLER CONFIGURATION (cont.)

INSTALLER CONFIGURATION (cont.)

INSTALLER CONFIGURATION (cont.)INSTALLER CONFIGURATION (cont.)

To exit the menu at any time, press

PROGRAM

MULTI-STAGE/HEAT PUMPMULTI-STAGE/HEAT PUMP

MULTI-STAGE/HEAT PUMP

MULTI-STAGE/HEAT PUMPMULTI-STAGE/HEAT PUMP
MODE.MODE.

MODE.

MODE.MODE.

(Installer table step 1.) Use this item
to select the system type (multi­stage or heat pump). IF YOU
HAVE A HEAT PUMP SYSTEM,
you must select HEAT PUMP here.
This sets up proper default values
for most heat pump systems. This
selection also makes available some
additional menu items that apply
only to heat pump systems.

HEAT PUMP COMPRES-HEAT PUMP COMPRES-

HEAT PUMP COMPRES-

HEAT PUMP COMPRES-HEAT PUMP COMPRES­SOR CONFIGURATION.SOR CONFIGURATION.

SOR CONFIGURATION.

SOR CONFIGURATION.SOR CONFIGURATION.

(Installer table step 2; this menu
item is displayed only when heat
pump was selected in step 1.) Use

RUN

.

this item to select the number of
heat pump compressors and how
they are connected.

ELECTRIC HEAT FANELECTRIC HEAT FAN

ELECTRIC HEAT FAN

ELECTRIC HEAT FANELECTRIC HEAT FAN
CONFIGURATION.CONFIGURATION.

CONFIGURATION.

CONFIGURATION.CONFIGURATION.

(Installer table step 3.) This menu
item determines whether fan control
will be through the thermostat or
through the heating system. If you
have an electric heat or other system
that REQUIRES the thermostat to
control the fan, set this item ON.
This allows the thermostat to
energize the fan immediately on a
call for heat. If you are unsure if the
system requires the thermostat to
control the fan, contact the equip­ment manufacturer or a qualified
heating and air conditioning service
person. If your system controls fan

14

operation (as with most fossil fuel
systems), set this item to OFF. Note
that with heat pump systems, the fan
always cycles with the compressor.

SET CYCLE HEAT, COOL,SET CYCLE HEAT, COOL,

SET CYCLE HEAT, COOL,

SET CYCLE HEAT, COOL,SET CYCLE HEAT, COOL,
AUX (ANTICIPATION).AUX (ANTICIPATION).

AUX (ANTICIPATION).

AUX (ANTICIPATION).AUX (ANTICIPATION).

(Installer table steps 4 through 6;
step 6 is for heat pump only). These
items allow the cycle times in
heating, cooling and auxiliary (heat
pump systems only) to be increased
or decreased. The factory set values
can be adjusted higher for longer
cycles or lower for shorter cycles.

NOTE: Some manufacturers still
instruct you to set the anticipator to
the current draw of the equipment.
That instruction applies only to
mercury bulb or mechanical
thermostats; it does not apply to

this digital thermostat. As config-

HEATING COOLING

Anticipation Value Cycle Length Differential Temperature Cycle Length Differential Temperature

Shorter 0.4–0.6 F (0.2–0.3 C) N/A1–8 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)

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

ured at the factory, this thermostat

The chart below shows how this adjustment range affects thermostat

performance.
will maintain an accurate tempera­ture. No further adjustment is
necessary, although you can use
these menu items to customize the
performance of the thermostat to
your requirements.

The adjustment range for HEATING
is from 1 to 40 (9 to 40 for heat
pump). The factory preset is 5 (13
for heat pump). The adjustment

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.
range for COOLING is from 9 to

40. The factory preset is 12 (13 for
heat pump). The cooling will not go
below 9 because compressors
require a longer cycle. The adjust­ment range for AUXILIARY (heat
pump only) is from 1 to 40. The
factory preset is 6.

15

Installation

INSTALLER TABLEINSTALLER TABLE

INSTALLER TABLE

INSTALLER TABLEINSTALLER TABLE

NOTE: You must be in the User Configuration Menu to enter the Installer Menu. Press TIME NOTE: You must be in the User Configuration Menu to enter the Installer Menu. Press TIME

NOTE: You must be in the User Configuration Menu to enter the Installer Menu. Press TIME

NOTE: You must be in the User Configuration Menu to enter the Installer Menu. Press TIME NOTE: You must be in the User Configuration Menu to enter the Installer Menu. Press TIME
time.time.

time.

time.time.

FWD

and TIME and TIME

and TIME

and TIME and TIME

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

SET

and SET

TIME

DAY

1 MLTI STGHEAT PUMP

(hold for approx.

Selects type of system. Selecting HEAT PUMP
makes additional menu items for heat pump
system available.

3 seconds)

2 HEAT PUMP

(Heat Pump ONLY)

3 ELECT HEAT FAN

4 SET CYCLE HEAT

5 SET CYCLE COOL

6 SET CYCLE AUX

(Heat Pump ONLY)

7 COOL FAN DELAY OFF

TIME

TIME

TIME

TIME

TIME

TIME

FWD

FWD

FWD

FWD

FWD

FWD

(1)

(ON)

(5 for multi-stage

13 for heat pump)

(13)

(06)

(00)

2 or 3

OFF

1 to 40 for multi-stage
9 to 40 for heat pump

9 to 40

1 to 40

0 to 127 seconds

Selects:

1. one compressor on Y1.

2. two compressors on Y1, Y2.

3. one compressor on W1.
Fan cycles with call for heat if ON. Fan always

cycles with pump stages.
Selects HEAT anticipation adjustment.

Selects COOL anticipation adjustment.

Selects AUXILIARY stage anticipation adjustment.
(Heat Pump ONLY)

Selects time delay for COOL fan OFF.

16

BACK

at same at same

at same

at same at same

See

Page

14

14

14

14

14

14

18

8 FAN DELAY ON

9 HEAT FAN DELAY OFF

10 PUMP

(Heat Pump ONLY)

11 COMP LOCK

12

13 HEAT-OFF-COOL-AUTO

PROGRAM

TIME

TIME

TIME

TIME

TIME

TIME

FWD

FWD

FWD

FWD

FWD

FWD

(OFF)

ECON

(OFF)

HEAT-EMER-OFF-COOL-

AUTO (for heat pumps)

RUN

(01)

(00)

(ON)

or

1 to 30 seconds

0 to 127 seconds

OFF

ON

ON

HEAT-OFF-COOL

HEAT-EMER-OFF-COOL

or

(for heat pumps)

Selects time delay for fan ON. Applies only to
compressor stages for heat pump or COOL.

Selects time delay for HEAT fan OFF only when
ELECT HEAT FAN (Step 3) is ON.

Fossil Fuel Kit Alternative option. Turns compressor
OFF if Auxiliary is ON for longer than one minute.
(Heat Pump 1 & 2)

Selects compressor short-cycle protection enabled
or OFF.*

Economizer option. Long Y1 cycles for cooling
with outdoor air.

Allows selection of HEAT and COOL or HEAT,
COOL and AUTO with SYSTEM button.
(EMER appears in sequence after HEAT if HEAT
PUMP is selected.)

Returns to normal operation.

18

18

18

19

19

19

* NOTE: COMP LOCK OFF permanently defeats compressor lockout. You must turn this selection ON if you do not have a
system that already provides compressor short-cycle protection. Please see “Lockout Bypass Option” to temporarily override

compressor lockout.

17

Installation

PROGRAMMABLEPROGRAMMABLE

PROGRAMMABLE

PROGRAMMABLEPROGRAMMABLE
COOL FAN-OFF ANDCOOL FAN-OFF AND

COOL FAN-OFF AND

COOL FAN-OFF ANDCOOL FAN-OFF AND
FAN-ON DELAY.FAN-ON DELAY.

FAN-ON DELAY.

FAN-ON DELAY.FAN-ON DELAY.

(Installer table steps 7 and 8.) These
items allow a selection of 0 to 127
seconds of fan-off delay after the
thermostat has satisfied the call for
cool, or a fan-on delay of 1 to 30
seconds on a call for cool (or heat
pump compressor activation).

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

A short delay to allow the A-coil

to cool off (or warm up in heat

pump) before the fan turns on may

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. Recom-

mended setting for fan-on delay is

10 seconds or less. A system that

does not have a high head pressure

cutout should have a delay of 10

seconds or less.

PROGRAMMABLEPROGRAMMABLE

PROGRAMMABLE

PROGRAMMABLEPROGRAMMABLE

HEAT FAN-OFF DELAY.HEAT FAN-OFF DELAY.

HEAT FAN-OFF DELAY.

HEAT FAN-OFF DELAY.HEAT FAN-OFF DELAY.

(Installer table step 9.) This item

allows a selection of 0 to 127

seconds of fan-off delay after the

thermostat has satisfied the call for

heat if ELECT HEAT FAN (Step 3)

is selected ON.

18

The fan-off delay allows the fan to
continue running after the burner,
heating element, etc. has shut off.
This distributes the heat that would
otherwise stay trapped in the ducts.
Ideally the timing would be set so
the fan shuts off just as the warm air
is exhausted. If this timing is set too
long the fan may begin blowing cool
air before it shuts off. Shortening
the fan-off delay will prevent this.

PUMP (FOSSIL FUEL KITPUMP (FOSSIL FUEL KIT

PUMP (FOSSIL FUEL KIT

PUMP (FOSSIL FUEL KITPUMP (FOSSIL FUEL KIT
ALTERNATIVE).ALTERNATIVE).

ALTERNATIVE).

ALTERNATIVE).ALTERNATIVE).

(Installer table step 10; heat pump
only) This item controls heat pump
compressor operation with a fossil
fuel auxiliary. This menu item may
eliminate the need for a separate
fossil fuel kit, although we recom­mend that you consult the heat
pump system manufacturer before

using this feature instead of a kit.
This item will allow the thermostat
to turn the heat pump compressor
off if the auxiliary is on for more
than one minute, to prevent
compressor head pressure from
getting too high. To use this feature
instead of a kit, select PUMP OFF.

COMPRESSOR LOCKOUT.COMPRESSOR LOCKOUT.

COMPRESSOR LOCKOUT.

COMPRESSOR LOCKOUT.COMPRESSOR LOCKOUT.

(Installer table step 11). This
thermostat is capable of protecting
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. With heat pump systems,
the word HEAT will flash if the
lockout occurs during a heat cycle.
During this period, the compressor
will not be energized.

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.

COMPRESSOR SHORT TERM
CYCLE PROTECTION

If this thermostat has been
configured to provide short-cycle
protection, during the 5-minute
lockout 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

DAY

buttons at the same time.

TIME

19

Installation

and SET

If the system has short-cycle
protection, this item should not need
to be enabled. However, if your

system does not have short-cycle
protection, turn COMP LOCK
ON. This will protect the compres-

sor from short-cycling and potential
premature compressor failure.

Note that COMP LOCK OFF
permanently disables compressor
lockout. If you need to temporarily
disable compressor lockout, please
see Lockout Bypass Option.

ECONOMIZER FEATURE.ECONOMIZER FEATURE.

ECONOMIZER FEATURE.

ECONOMIZER FEATURE.ECONOMIZER FEATURE.

(Installer table step 12). This item
allows longer Y1 cycles for cooling
with outdoor air.

DISABLING AUTOMATICDISABLING AUTOMATIC

DISABLING AUTOMATIC

DISABLING AUTOMATICDISABLING AUTOMATIC
CHANGEOVER MODE.CHANGEOVER MODE.

CHANGEOVER MODE.

CHANGEOVER MODE.CHANGEOVER MODE.

(Installer table step 13). This
thermostat, as configured at the
factory, provides automatic
changeover, which allows the
thermostat to switch between
heating and cooling to maintain
temperature. In this configuration,
when you press the SYSTEM
button, the thermostat will go
through HEAT-OFF-COOL-AUTO
modes (HEAT-EMER-OFF-COOL­AUTO for heat pumps). Select
HEAT(-EMER)-OFF-COOL to
disable the automatic changeover
feature.

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATION

CHECK THERMOSTAT OPERATIONCHECK THERMOSTAT 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.

until

RUN

.

FAN ONFAN ON

FAN ON is

FAN ONFAN ON

2. Press PROGRAM

3. Press

FAN

displayed. The fan should begin
to operate.

4. Press

FAN

until

FAN AUTOFAN AUTO

FAN AUTO

FAN AUTOFAN AUTO

is displayed. The fan should stop
operating.

20

HEATING SYSTEMHEATING SYSTEM

HEATING SYSTEM

HEATING SYSTEMHEATING SYSTEM

1. Press PROGRAM

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

3. Press
setting above room temperature. The
heating system should begin to
operate.

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

SYSTEM

until

HEATHEAT

HEAT is

HEATHEAT

to adjust thermostat

RUN

.

COOLING SYSTEMCOOLING SYSTEM

COOLING SYSTEM

COOLING SYSTEMCOOLING SYSTEM

CAUTION

!

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

until

RUN

.

COOLCOOL

COOL is

COOLCOOL

1. Press PROGRAM

2. Press
displayed.

3. 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.

4. Press
ture setting above room temperature.
The cooling system should stop
operating, and the fan should stop

SYSTEM

to adjust tempera-

running (after the fan-off delay time,

if any).

MULTI-STAGE/HEAT PUMPMULTI-STAGE/HEAT PUMP

MULTI-STAGE/HEAT PUMP

MULTI-STAGE/HEAT PUMPMULTI-STAGE/HEAT PUMP

AUXILIARY OPERATIONAUXILIARY OPERATION

AUXILIARY OPERATION

AUXILIARY OPERATIONAUXILIARY OPERATION

TESTTEST

TEST

TESTTEST

Follow these steps to energize all

stages of heat or cool to permit

system checks during installation.

HEA T: Press

temperature setting to 99°F, then

hold for five seconds. The second

and third stage heat relays will

energize immediately for test

purposes. The LED indicator will

glow green for first stage and yellow

for second stage.

to raise

21

COOL: Press
temperature setting to 45°F, then
hold for five seconds. The second
stage cool relay will energize
immediately for test purposes. The
LED indicator will glow green for
first stage and yellow for second
stage.

EMERGENCY (heat pump only):

Press

SYSTEM

mode. The LED indicator will glow
red for emergency mode. A flashing
light indicates a malfunction in the
system.

to lower

to select EMER

TROUBLESHOOTINGTROUBLESHOOTING

TROUBLESHOOTING

TROUBLESHOOTINGTROUBLESHOOTING
RESET BUTTONRESET BUTTON

RESET BUTTON

RESET BUTTONRESET BUTTON

If the thermostat does not respond
when keys are pressed, or the
thermostat is not operating properly,
you may use the reset button located
on the back of the thermostat body
(see fig. 2). Thermostat program­ming and configuration will not be
affected by pressing the reset button.
However, the clock will need to be
reset.

RESETTING THERMOSTATRESETTING THERMOSTAT

RESETTING THERMOSTAT

RESETTING THERMOSTATRESETTING THERMOSTAT

CONFIGURATION ANDCONFIGURATION AND

CONFIGURATION AND

CONFIGURATION ANDCONFIGURATION AND

PROGRAMMINGPROGRAMMING

PROGRAMMING

PROGRAMMINGPROGRAMMING

The thermostat can be reset back to

default programs and configuration.

Removing power from the thermo-

stat will not reset it, because the

default settings are maintained in

permanent memory. Before

resetting the thermostat, you may

want to make note of the previously

selected configuration and program-

ming. You must reconfigure and

reprogram the thermostat after

resetting it using this method.

22

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

HOLDHOLD

HOLD mode and will maintain

HOLDHOLD

factory preset temperatures.

FAN

buttons at the same time. This

RUN

, TIME

, then

BACK

and

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

display will show the first item in the
configuration menu.

The following charts (pages 24 & 25)
describe each item on the menus. Press

FWD

TIME

next item in the menu or TIME
to move backward to the previous item.
Set these according to your personal
preference using or . To
enter the Keypad Lock menu, while in

RUN

to make sure

FWD

and

at the same time. The

to move forward to the

BACK

the User Menu, press and hold TIME

FWD

and TIME

BACK

for at least

two seconds.

To exit either menu and return to normal

operation, press PROGRAM

RUN

. To

re-enter to the User menu at any time

press PROGRAM

FWD

TIME

RUN

and TIME

, then press

BACK

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.

23

Configuration

User Menu

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

TIME

FWD

BACK

1

and TIME

at same time

for 2 seconds

2 EMR

3 (˚F) ˚C

4 SET FAN

5 BEEP

6 HEAT FAST

7 COOL FAST

8 FONE (Icon)

TIME

TIME

TIME

TIME

TIME

TIME

TIME

FWD

FWD

FWD

FWD

FWD

FWD

FWD

(Factory Default) Page

0˚F

(room temperature)

(ON)

5 LO to

5 HI

OFF

or ON L

Adjusts temperature display higher or lower.

Selects EMR option ON or OFF or L ON.

Adjusts temperature display to F or C.

(0)

0 - 6 HRS

OFF

Set Fan (one shot) option. Set the duration of a
temporary fan option.

Not available on 1F92-371.

(ON)

(OFF)

ON

ON

(OFF)

ON

(OFF)

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

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

Telephone RUN program feature. Requires optional
X10 system.

24

30

30

31

31

n/a

31

31

32

User Menu (Continued)

9 COMP RUN TIME

10 AUX RUN TIME

PROGRAM

11

TIME

TIME

FWD

FWD

(00)

(00)

RUN

(Compressor run time

in hours)

(AUXILIARY run time

in hours)

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

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

Returns to normal operation.

Keypad Lockout Menu (access from User Menu)

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

TIME

and TIME

FWD

BACK

1

(hold for two

seconds)

2

3

PROGRAM

TIME

FWD

RUN

(Factory Default) Page

PART LOCK

(OFF)

LOCK
(OFF)

ON

ON

Partial Keypad lockout OFF or ON.

Total Keypad lockout OFF or ON.

Returns to normal operation.

25

Configuration

32

32

32

32

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 (page 28)
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

HeatHeat

Heat,

HeatHeat

CoolCool

Cool, or

CoolCool

set to

. Use

AutoAuto

Auto.

AutoAuto

SYSTEM

SYSTEM

Fill out the blank schedule (page 29)

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.

3. Press SET

TIME

again. The

display will show minutes. Use

26

TIME

FWD

or TIME

BACK

to set

to the current minutes.

4. Press PROGRAM

To Set the DayTo Set the Day

To Set the Day:

To Set the DayTo Set the Day

5. Press SET

DAY

RUN

.

. The display

will indicate a day of the week. Use

TIME

FWD

or TIME

BACK

to set

to the current day of the week.

to select

RUN

.

HEATHEAT

HEAT

HEATHEAT

COOLCOOL

COOL (for

COOLCOOL

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
cooling program).

8. Press PROGRAM
time. The display will show

VIEW

one

MORMOR

MOR,

MORMOR

the settings for time and temperature

MONMON

and

TUE, WED, THU, FRI.TUE, WED, THU, FRI.

MON,

TUE, WED, THU, FRI.

MONMON

TUE, WED, THU, FRI.TUE, WED, THU, FRI.

FWD

9. Press TIME

BACK

to set the time on the display

or TIME

as selected in your HEATING or
COOLING SCHEDULE. Be sure
to check the AM or PM on the
display.

10.Press the red

or blue

key to adjust the temperature
to match your schedule. If you want
the fan ON continuously during this
period, press

11.Press PROGRAM

MORMOR

time.

MOR on the display will

MORMOR

change to

FAN

.

VIEW

DD

AA

YY

D

A

Y. Repeat steps 9 and

DD

AA

YY

one

10 to enter time and temperature for
this period.

12.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

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

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

27

Programming

MORNING (MOR)

H

DAY (DAY)

E
A

EVENING (EVE)

T

NIGHT (NHT)

5/2 Day Sample Program Schedule
(Shows factory programming)

5-DAY 2-DAY

Start Time Temper ature Start Time T emper ature

6:00 AM
8:00 AM
5:00 PM

10:00 PM

70 F (21 C)
62 F (17 C)
70 F (21 C)
62 F (17 C)

6:00 AM
8:00 AM
5:00 PM

10:00 PM

70 F (21 C)
62 F (17 C)
70 F (21 C)
62 F (17 C)

MORNING (MOR)

C

DAY (DAY)

O
O

EVENING (EVE)

L

NIGHT (NHT)

6:00 AM
8:00 AM
5:00 PM

10:00 PM

78 F (25 C)
85 F (29 C)
78 F (25 C)
82 F (27 C)

28

6:00 AM
8:00 AM
5:00 PM

10:00 PM

78 F (25 C)
85 F (29 C)
78 F (25 C)
82 F (27 C)

MORNING (MOR)

H

DAY (DAY)

E
A

EVENING (EVE)

T

NIGHT (NHT)

MORNING (MOR)

C

DAY (DAY)

O
O

EVENING (EVE)

L

NIGHT (NHT)

5/2 Day Personal
Program Schedule

5-DAY 2-DAY

Start Time Temper ature Start Time T emper ature

29

FEATURES

CONFIGURATIONCONFIGURATION

CONFIGURATION

CONFIGURATIONCONFIGURATION
MENU FEATURESMENU FEATURES

MENU FEATURES

MENU FEATURESMENU FEATURES
Adjustable TemperatureAdjustable Temperature

Adjustable Temperature

Adjustable TemperatureAdjustable Temperature
Display.Display.

Display.

Display.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
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
adjust, refer to the CONFIGURA­TION section (page 24, item 1).

73°73°

73°, you can adjust it. To

73°73°

Selectable EnergySelectable Energy

Selectable Energy

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

Management Recovery (EMR).

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

(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. In multistage heating, the
thermostat will start 8 minutes early
for every 1°F difference between the
room temperature and the next
programmed temperature. In cooling
and heat pump applications, the
thermostat uses 15 minutes per °F.
For heating applications 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 24, item 2) the thermo-

30

stat 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°. 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
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 24, item 2).

Fahrenheit or Celsius Tem-Fahrenheit or Celsius Tem-

Fahrenheit or Celsius Tem-

Fahrenheit or Celsius Tem-Fahrenheit or Celsius Tem­perature Display.perature Display.

perature Display.

perature Display.perature Display.

(User menu, Item 3) 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 24, item 3).

Single Period Fan Control.Single Period Fan Control.

Single Period Fan Control.

Single Period Fan Control.Single Period 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

1.5 seconds. If a time is set in the
User menu (page 24, item 4) the

FF

display will show

PRG FAN ONPRG FAN ON

PRG FAN ON for six seconds.

PRG FAN ONPRG FAN ON

After six seconds the display will
continue to indicate
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 key.

Heat Fast.Heat Fast.

Heat Fast.

Heat Fast.Heat Fast.

(User menu, Item 6) This feature,
when set to ON, will bring the
second stage of heating on any time

ANAN

F

AN, # hrs and

FF

ANAN

PRG FAN ONPRG FAN ON

PRG FAN ON

PRG FAN ONPRG FAN ON

31

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.

Cool Fast.Cool Fast.

Cool Fast.

Cool Fast.Cool Fast.

(User menu, Item 7) 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
temperature. 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.

Features

Activate RUN PRGActivate RUN PRG

Activate RUN PRG

Activate RUN PRGActivate RUN PRG
by Telephone.by Telephone.

by Telephone.

by Telephone.by Telephone.

(User menu, Item 8) With the
optional X-10 Touch Tone Control­ler and a 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
www.x10.com, or 800-675-3044.

Compressor Run Time.Compressor Run Time.

Compressor Run Time.

Compressor Run Time.Compressor Run Time.

(User menu, Item 9 and 10) You
can see how long the compressor
has run (in hours) by viewing the
User table, Item 9. You can see how
long the system Auxiliary has run
(in hours) by viewing the User table,
Item 10. These can be reset to 00
when displayed by pressing
and at the same time.

Keypad Lockout.Keypad Lockout.

Keypad Lockout.

Keypad Lockout.Keypad Lockout.

(Keypad Lockout table) 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 the number of hours

32

you specify if you set up your Hold
Till timing (see “Temporary
Program Override” (page 37). To
select or deselect this feature, refer
to the CONFIGURATION section
(page 25, Keypad Lock menu).

TRADITIONAL FEATURESTRADITIONAL FEATURES

TRADITIONAL FEATURES

TRADITIONAL FEATURESTRADITIONAL FEATURES
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
between heating and cooling as
needed. To set your thermostat to

this operating mode, press

SYSTEM

button until AUTO is displayed on
the screen.

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

Compressor Short-CycleCompressor Short-Cycle

Compressor Short-Cycle

Compressor Short-CycleCompressor Short-Cycle
Protection.Protection.

Protection.

Protection.Protection.

RUN

.

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 approximately five minutes
between cycles. When the thermo­stat is in compressor lock-out, the
word COOL will flash. During this
period, the compressor will not be
energized.

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 during
a specific time period. If you do not
use this feature, the fan will cycle
normally with the heating and
cooling system.

To program the fan, follow the steps
in the PROGRAMMING section. In
each time period, you can press the
FAN key to select a continuous fan
or a normally cycling fan. The

PRPR

G FG F

display will show

PR

PRPR

G F

G FG F

AN ONAN ON

AN ON

AN ONAN ON

when continuous fan is selected.
This means at the time you set the
period to start, the fan will come on
and run continuously until the next

33

program time period.
Example: Your thermostat is

programmed with the original
factory settings for the Monday
MOR period in the heating mode.

Pressing PROGRAM

MORMOR

MOR,

MORMOR

6AM 6AM

6AM and

6AM 6AM

display

VIEW

70 70

70.

70 70

will

Pressing the FAN key will toggle
the programmable fan ON and a
second press would turn it back

PRPR

G FG F

OFF . When

PR

PRPR

G F

G FG F

AN ONAN ON

AN ON is in the

AN ONAN ON

upper right of the display, your
thermostat is programmed to adjust
the temperature to 70° at 6AM and
also bring the fan on to run
constantly until the next program
time period.

At the next time period you may
choose to continue the program fan

Features

feature. Change to the next program
period and press the FAN key until

PRPR

G FG F

AN ONAN ON

PR

G F

AN ON is on the display.

PRPR

G FG F

AN ONAN ON

The fan will continue to run through
this period as well as the previous
one.

If the thermostat is in a period with
continuous fan and you want the fan

PRPR

to cycle, press the FAN key.

FAN ONFAN ON

FAN ON on the display will turn

FAN ONFAN ON

PR

PRPR

GG

G

GG

off.

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

CHNG FLTRCHNG FLTR

display

CHNG FLTR (change

CHNG FLTRCHNG FLTR

filter) after a set time of fan
operation. This is a reminder to
change or clean your air filter. The
factory set interval for

FLTRFLTR

FLTR to be displayed is 200 hours

FLTRFLTR

CHNGCHNG

CHNG

CHNGCHNG

of fan operation. This can be set
anywhere from 0 to 1950 hours in
25 hour increments. A selection of

0000

00 will cancel this feature.

0000

CHNG FLTRCHNG FLTR

When

CHNG FLTR is displayed,

CHNG FLTRCHNG FLTR

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 FLCHNG FL

CHNG FL

CHNG FLCHNG FL

TRTR

TR is on the display,

TRTR

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

FLTRFLTR

FLTR proceed to step 2.

FLTRFLTR

CHNGCHNG

CHNG

CHNGCHNG

2. Press the FILTER key, The
display will show

TIMETIME

TIME and the number of hours

TIMETIME

remaining before

SET FILSET FIL

SET FIL

SET FILSET FIL

CHNG FLTRCHNG FLTR

CHNG FLTR

CHNG FLTRCHNG FLTR

34

TERTER

TER

TERTER

indicator will display.

3. Press the FILTER key a second
time. The display will show

FILFIL

TER TER

FIL

FILFIL

TIMETIME

TER

TIME and will show the

TER TER

TIMETIME

SETSET

SET

SETSET

number of hours to filter change.

4. Press TIME

BACK

to change the time to your

FWD

or TIME

requirements.

5. 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.

System and ThermostatSystem and Thermostat

System and Thermostat

System and ThermostatSystem and Thermostat
Diagnostics.Diagnostics.

Diagnostics.

Diagnostics.Diagnostics.

The display will indicate

SYSSYS

SYS if the room temperature does

SYSSYS

CHECKCHECK

CHECK

CHECKCHECK

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

STST

AA

TT

ST

A

T if one of the following

STST

AA

TT

CHECKCHECK

CHECK

CHECKCHECK

occurs.

• One of the keys is stuck down or
in.

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

• The thermostat sensor is not
functioning. If using a remote

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

After checking the above, press
PROGRAM

RUN

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

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

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 tempera­ture you want is displayed. The
display will indicate

HOLDHOLD

HOLD, and the

HOLDHOLD

number of hours remaining in the
hold period will be indicated with

35

the word

HRSHRS

HRS. To adjust the length

HRSHRS

of time for the override, press
TIME

HOLD TILLHOLD TILL

HOLD TILL will be displayed as

HOLD TILLHOLD TILL

FWD

or TIME

BACK

.

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

BACK

keys until you reach

FWD

or

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

BACK

keys adjust the time in

FWD

or

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

Features

without a program running, press

HOLD

PROGRAM

. The or

keys 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

.

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 key 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,

VV

AA

press VACATION.

TILLTILL

TILL will be displayed. The display

TILLTILL

will also show
the number

5 5

5 to indicate the factory

5 5

CA HOLDCA HOLD

V

A

CA HOLD

VV

AA

CA HOLDCA HOLD

DD

AA

YY

SS

D

A

Y

S (flashing) and

DD

AA

YY

SS

default of a 5 day period. To change
the number of vacation days, press
TIME

FWD

or TIME

BACK

. Press

or 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. Press only TIME

FWD

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 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

36

alternation, and will display

VACAVACA

VACA.

VACAVACA

Pressing VACATION again will
activate the vacation mode settings.
Pressing PROGRAM

RUN

cancels
this feature and begins running your
normal program.

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

Large Lighted Liquid CrystalLarge Lighted Liquid Crystal

Large Lighted Liquid Crystal

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

Display (LCD).

Display (LCD).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 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.

Arm Chair Programming.Arm Chair Programming.

Arm Chair Programming.

Arm Chair Programming.Arm Chair Programming.

The thermostat uses 24 VAC power
supplied 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 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 to configure and program
the thermostat.

Thermostat Startup After TotalThermostat Startup After Total

Thermostat Startup After Total

Thermostat Startup After TotalThermostat Startup After Total
Power Loss.Power Loss.

Power Loss.

Power Loss.Power Loss.

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

37

temperature of 62°F (16°C) and a
cooling temperature of 85°F (29°C).

If the 24 volts from the Heating/
Cooling transformer is lost, your
thermostat will lose its display in 2
minutes and may lose time in about
5 hours. This hold up time will be
much shorter if the control had not
been powered for at least 4 hours
prior to the power outage. When
power is restored, the thermostat
will return to the temperatures listed
above.

If this happens, set the clock and
day of the week (use PROGRAM­MING steps 1 through 6 from
“Entering Y our Program” page

26), then select

COOLCOOL

COOL or

COOLCOOL

key, and press PROGRAM

HEAT, EMER,HEAT, EMER,

HEAT, EMER,

HEAT, EMER,HEAT, EMER,

AUTOAUTO

AUTO using the

AUTOAUTO

SYSTEM

RUN

to resume operation with your

Features

previously set program.
After a power loss, the remote

sensors will be operating properly,
however, temperature at the remote
sensors can not be displayed until
PROGRAM

Second Stage Time Delay.Second Stage Time Delay.

Second Stage Time Delay.

Second Stage Time Delay.Second Stage Time Delay.

RUN

is pressed.

Your thermostat is designed to
determine the optimum time to
activate the second stage. Simply
raising the temperature in heating or
lowering it in cooling will not
always force the thermostat to bring
the second stage on quickly. There is
a time delay from 0-30 minutes
depending on the performance of the
first stage of the system.

Example: For the last 2 hours the
thermostat is set on 70° and the
room 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
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

38

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 31.

INDEX

Activate RUN PRG

by T elephone ------------------- 32
Adjustable Temperature Display 30
Air Filter Change-out Indicator - 34
Arm Chair Programming -------- 37
Automatic Changeover ---------- 32
Auxiliary Run Time -------------- 32
COMPONENTS ------------------ 2

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

Display --------------------------- 3
Compressor Run Time ----------- 32
Compressor Short-Cycle
Protection -------------------------- 33
CONFIGURATION ------------- 23

User Menu T able--------------- 24

Keypad Lockout Menu Table- 25
Cool Fast--------------------------- 31
Daylight Savings Time Button -- 36
Energy Management Recovery-- 30

Fan Control, Single Period ------ 31
Fan Control, Programmable ----- 33
Factory Preprogrammed --------- 32
Fahrenheit or Celsius T emperature
Display ----------------------------- 32
FEATURES

Configuration Menu ----------- 30

Traditional ---------------------- 32
Heat Fast --------------------------- 31
Indefinite Program Hold --------- 35
INSTALLATION------------------ 4
INTRODUCTION ---------------- 1
Keypad Lockout ------------------ 32
Liquid Crystal Display ----------- 37
Operation

Manual -------------------------- 26

Programmed -------------------- 26
ORIENTATION ------------------- 2

39

Program

Entering Y our ------------------- 26
Planning Y our ------------------ 26

T emporary Override ----------- 35
PROGRAMMING--------------- 26
Schedule

Sample Program --------------- 28

Personal Program --------------29
Set

Clock ---------------------------- 26

Day ------------------------------ 26

Program ------------------------- 26
System and Thermostat

Diagnosis ----------------------- 34
T emporary Program Override --- 35
Thermostat Startup After Total
Power Loss ------------------------37
Vacation ---------------------------- 36

37-6422C

0513

Index

NOTES

NOTES

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

White-Rodgers is a division

of Emerson Electric Co.

PART NO. 37-6422C

Replaces 37-6422B

0513