Easy, Menu-Driven Set-UpEasy, Menu-Driven Set-Up
and Programmingand Programming
and Programming
and Programmingand Programming
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Premium options
to customize the thermostat
to fit your application.
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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
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