Easy, Menu-Driven Set-UpEasy, Menu-Driven Set-Up
and Programmingand Programming
and Programming
and Programmingand Programming
1
5
2
4
3
6
78
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
InstallationProgramming
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
1818
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
MONWED 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
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 LightNot Used
SYSTEMECRW3/A1W2E2/PW1Y2Y1BOG
Multi-Stage No function24 Volt24 VoltNot Used Heat mode No function Heat mode Cool mode Cool mode Energized in Energized in Blower/Fan
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.
System requiring separate signals for heat (W1, W2) and cool (Y1); gas or electric backup
Heat Pump 3** Emergency24 Volt24 VoltNot 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 stage1st stageHeat, Off Cool mode Energized on
1st stageEmergency constantEmergencycall for Heat
modeoutput.modeand 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 Installermenu, 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 holdSET
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
(Installer table step 1.) Use this item
to select the system type (multistage or heat pump). IF YOUHAVE 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.
(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-
HEATINGCOOLING
Anticipation Value Cycle Length Differential Temperature Cycle Length Differential Temperature
Shorter0.4–0.6 F (0.2–0.3 C)N/A1–8N/A
Longer Shorter9–200.6–1.0 F (0.3–0.6 C)0.6–1.0 F (0.3–0.6 C)
Hydronic Longer21–401.0–1.6 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
StepPress Button(s)Displayed (Factory Default)Press or to select:COMMENTS
SET
and SET
TIME
DAY
1MLTI STGHEAT PUMP
(hold for approx.
Selects type of system. Selecting HEAT PUMP
makes additional menu items for heat pump
system available.
3 seconds)
2HEAT PUMP
(Heat Pump ONLY)
3ELECT HEAT FAN
4SET 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 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.
(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.
(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.
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.
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
StepPress Button(s)DisplayedPress or to select: COMMENTSRef
TIME
FWD
BACK
1
and TIME
at same time
for 2 seconds
2EMR
3(˚F)˚C
4SET FAN
5 BEEP
6 HEAT FAST
7 COOL FAST
8FONE (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)
9COMP RUN TIME
10AUX 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)
StepPress Button(s)DisplayedPress or to select: COMMENTSRef
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 orCOOLING 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-DAY2-DAY
Start TimeTemper atureStart TimeT 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-DAY2-DAY
Start TimeTemper atureStart TimeT 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).
(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 “TemporaryProgram 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
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 TIMETIME
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
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 SAVINGSTIME key to advance the time
forward one hour in the Spring. In
the Fall press the DAYLIGHTSAVINGS 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
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
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