Shipping Temperature Range ................................ -40° to +150°F (-40° to +65°C)
Dimensions Thermostat ......................................... 3-3/4”H x 4-3/4”W x 1-1/2”D
PRECAUTIONS
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Thermostat installation and all components of the
system shall conform to Class II (current limited)
circuits per the NEC code. Failure to do so could cause
a fire hazard.
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. If the
old thermostat has a wall mounting plate, remove the
thermostat and the wall mounting plate as an assembly.
3. Identify each wire attached to the old thermostat using
the labels enclosed with the new thermostat.
4. Disconnect the wires from old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Install new thermostat using the following procedures.
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 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. Refer to www.white-rodgers.com for location
to send the product containing mercury.
Figure 1. Thermostat Base
FAN (ELE/GAS) SWITCH
For Electric Heat, heat pump or any system that requires the
thermostat to turn on the blower on a call for heat– place the
FAN (Ele/Gas) switch (Fig. 1) in the ON position. For Auxiliary
and Emergency Heat systems that have a fan control to turn
on the blower (independent of the thermostat) place switch in
the OFF position.
BATTERY LOCATION
ATTACH THERMOSTAT BASE TO WALL
1. Remove the packing material from the thermostat. Gently
pull the cover straight off the base. Forcing or prying on the
thermostat will cause damage to the unit.
2. Place base over hole in wall and mark mounting hole
locations on wall using base as a template (see Fig.1).
3. Move base out of the way. Drill mounting holes.
4. Push wires through opening in thermostat base.
5. Fasten base loosely to wall using two mounting screws.
Place a level against bottom of base, adjust until level,
and then tighten screws. (Leveling is for appearance only
and will not affect thermostat operation.) If you are using
existing mounting holes, or if holes drilled are too large and
do not allow you to tighten base snugly, use plastic screw
anchors to secure subbase.
6. Connect wires to terminals on base using appropriate
wiring schematic (see figs. 2 through 4).
7. Push excess wire into wall and plug hole with a fire-resistant
material (such as fiberglass insulation) to prevent drafts
from affecting thermostat operation.
O/B TERMINAL SWITCH SELECTION
The O/B switch on this thermostat is factory set to the “O”
position. This will accommodate the majority of heat pump
applications, which require the changeover relay to be
energized in COOL. If the thermostat you are replacing or the
heat pump being installed with this thermostat requires a “B”
terminal, to energize the changeover relay in HEAT, the O/B
switch must be moved to the “B” position.
Two “AA” alkaline batteries are installed in your thermostat
with a battery tag to prevent power drainage. Prior to use,
open the battery door and remove the battery tag. To open,
pull the battery door as shown by the arrow and lift open. The
two “AA” batteries will operate all functions or maintain time
and continuously display the temperature during a loss of AC
power. Installed batteries will also allow programming prior to
installation. To replace batteries, pull the battery door shown
by the arrow and lift open. Using the polarity indicated inside
the battery door, insert the batteries. To close the battery door,
swing the door down while pulling in the direction of arrow.
Once fully down, snap the door back into position.
Thermostat can be powered by system AC power or Battery. If
is displayed, the thermostat is battery powered. If is not
displayed, thermostat is system powered with optional battery
back-up. When battery power remaining is approximately half,
the
will be displayed. When “Change” is displayed,
install fresh “AA” alkaline batteries immediately. For best
results, use new premium brand alkaline batteries such as
Duracell® or Energizer®. We recommend replacing batteries
every 2 years. If the home is going to be unoccupied for an
extended period (over 3 months) and
is displayed, the
batteries should be replaced before leaving. When less than
two months of battery life remain, the setpoint temperature will
offset by 10 degrees (10 degrees cooler in Heat mode / 10
degrees warmer in Cool mode). If offset occurs, the normal
setpoint can be manually reset with
or . Another offset
will occur within two days if batteries are not replaced. To
replace the batteries, set system to OFF.
2
WIRING DIAGRAM
L
R
C
24 VAC
120 VAC
Hot
SYSTEM
MONITOR
SWITCH
Neutral
THERMOSTAT
SYSTEM
GW2
Figure 2. Typical wiring diagram for single transformer systems
TRANSFORMER
(Class II Current Limited)
Changeover
Relay*
YO/B
Compressor
Contactor
Changeover Relay is energized in COOL when O/B switch is in the “O” position
Changeover Relay is energized in HEAT when O/B switch is in the “B” position
The 24 volt neutral connection to terminal C on the thermostat is not required if you
replace the batteries once a year with fresh “AA” alkaline batteries.
Aux/Emergency
Heat Relay
(Stage 2)
Fan
Relay
**
*
**
11
12
13
2
1
3
4
5
6
7
8
9
10
11
13
12
1
2
3
4
5
6
7
8
9
10
THERMOSTAT QUICK REFERENCE
Before you begin programming your thermostat, you should be
familiar with its features and with the display and the location
and operation of the thermostat buttons and switches (see fig.
3). Your thermostat consists of two parts: the thermostat cover
and the base. To remove the cover, pull it straight out from the
base. To replace the cover, line up the cover with the base and
press until the cover snaps onto the base.
The Thermostat Buttons and Switches
Raises temperature setting.
Lowers temperature setting.
SYSTEM switch (COOL, OFF, HEAT, EMER).
FAN switch (ON, AUTO).
The Display
Indicates setpoint temperature. This is blank when system
switch is in the OFF position. Setpoint temperature is
displayed (flashing) if the thermostat is in lockout mode to
prevent the compressor from cycling too quickly.
“AUX” indicates auxiliary stage is operating.
“Save” indicates the Cool Savings feature is enabled in
the configuration menu. “Save” (flashing) indicates Cool
Savings feature is active.
Flame icon ( ) is displayed when the SYSTEM switch is
in the HEAT position. Flame icon ( ) is displayed flashing
when thermostat is calling for heat. Snowflake icon (
) is displayed (non-flashing) when the SYSTEM switch is
in the COOL position. Snowflake icon ( ) is displayed
(flashing) if the thermostat is calling for cool.
Displays current temperature.
“Service” indicates a diagnostic fault in the heating/
cooling system. It does not indicate a fault in the
thermostat.
“EMER” is displayed flashing when the system switch is
in EMER position.
“Change Filter” is displayed when the system has run
for the programmed filter time period as a reminder to
change or clean your air filter.
“” indicates when batteries are low and should be
replaced.
Figure 3. Thermostat display, buttons and switches
3
INSTALLER/CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal
requirements. To enter the menu: Set your thermostat switch to
OFF. Press and hold the and buttons simultaneously
for approximately 5 seconds. The display will change to
show the first item in the configuration menu. Press the
or button to change the setting. Press the and
buttons simultaneously again to change to the next menu item.
Continue through all steps to accept your new settings. To exit
the menu set the system switch to COOL, HEAT or EMER. If
no keys are pressed within fifteen minutes, the thermostat will
revert to normal operation.
1) Select CS (Cool Savings™) - With Cool Savings™
enabled, the thermostat will make small adjustments to
the Setpoint temperature during periods of high demand
to reduce cooling system running time and save energy.
When the cooling system has been running for more than
20 minutes, humidity in the home will be lower and a higher
setpoint temperature will feel comfortable. After 20 minutes
of run time, the thermostat will start increasing the setpoint
temperature in steps of less than one degree as the system
continues to run. These adjustments will eventually cause
the system to satisfy the thermostat and turn the system off
to reduce the energy consumption. When the Cool Savings
feature is active and making adjustments, the display will
show “Save”. The amount of the adjustments to the setpoint
temperature is dependent on the Cool Savings value that
is set, 1 being the least adjustment and 6 being the most
adjustment. With this feature set to OFF, no change will
occur when the cooling system is continuously running
during the periods of high demand. Periods of high demand
will normally occur during the late afternoon and early
evening on the hottest days of the summer.
setting is (FA, CR) for all modes (Heat Pump, Heat Pump
Aux, Heat and Cool). To change to slow cycling (SL, CR),
press the or keys to toggle between FA & SL.
The cycle rate differentials for different settings are:
MODE Fast Slow
FA SL
Heat Pump 1.2°F 1.7°F
HP Aux 0.8°F 1.2°F
4) Select Compressor Lockout CL OFF or ON - Selecting
CL On will cause the thermostat to wait 5 minutes between
cooling cycles. This is intended to help protect the
compressor from short cycling. Some newer compressors
already have a time delay built in and do not require this
feature. Your compressor manufacturer can tell you if the
lockout feature is already present in their system. When the
thermostat compressor time delay occurs, it will flash the
setpoint for up to five minutes.
Menu
Reference
Number
1
2
3
4
5
6
7
8
9
10
Press
Key
and
and
and
and
and
and
and
and
and
and
and
and
Displayed
(Factory
Default)
CS
(OFF)
CS
(3)
CR HE-PU
(FA)
CR Aux
(FA)
CL
(OFF)
L
(On)
Temp
(0 HI)
o
F
FH
(On)
Change Filter
(OFF)
Change Filter
(200 h)
Configuration Menu
Press
to select
from listed
options
OnSelect Cool Savings Feature On or OFF
1, 2, 3, 4, 5, 6If CS selected On, selects Cool Savings value
25 to 1975If Change Filter selected On, selects time inter-
Comments
or
Pump, Heat and Cool
Heat Pump Aux Stage
Select temperature display adjustment higher
or lower
Fahrenheit or Celsius)
val for Change Filter Indicator.
(in 25 hour increments)
Returns to normal operation
4
INSTALLER/CONFIGURATION MENU
CAUTION
!
CAUTION
!
5) Select Backlight Display - The display backlight improves
display contrast in low lighting conditions. When the “C”
terminal is connected, selecting backlight CdL On will keep
the light on continuously. Select backlight OFF will turn the
light on momentarily when any key is pressed. When the
“C” terminal is not connected, regardless of the backlight
selection, the light will be on momentarily when any key is
pressed.
6) Select Temperature Display Adjustment 4 LO to 4 HI -
Allows you to adjust the room temperature display up to 4°
higher or lower. Your thermostat was accurately calibrated
at the factory but you have the option to change the display
temperature to match your previous thermostat. The
current or adjusted room temperature will be displayed on
the display.
7) Select F° or C° Readout - Changes the display readout to
Celsius or Fahrenheit as required.
OPERATION
CHECK THERMOSTAT OPERATION
If at any time during testing your system does not operate
properly, contact a qualified service person.
Turn on power to the system.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. Move fan switch to ON position. The blower should begin to
operate.
2. Move fan switch to AUTO position. The blower should stop
immediately.
Heating System
1. Move SYSTEM switch to HEAT position. If the auxiliary
heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting to 1° above room
temperature. The Flame icon ( ) will begin to flash and the
Heat Pump system should begin to operate. However, if the
setpoint temperature is flashing, the compressor lockout
feature is operating (see Configuration menu, item 6).
3. Adjust temperature setting to 4o above room temperature.
The auxiliary heat system should begin to operate and the
Aux icon will be flashing.
4. Press to adjust temperature setting below room
temperature. The heating system should stop operating.
Emergency System
EMER bypasses the Heat Pump to use the heat source wired
to terminal W2 on the thermostat. EMER is typically used when
compressor operation is not desired, or you prefer back-up
heat only.
8) Select Fast Second Stage ON or OFF - (Heat Pump Only)
In the HEAT mode, with the Fast Heat feature enabled (FH
Heat On), if the temperature is manually raised by 3°F (2°C)
or more above the actual temperature using the
second stage will energize immediately. With FH OFF, the
thermostat will determine the optimum time (approximately
0 to 30 minutes) to use Auxiliary/Second stage heat in
addition to the Heat Pump.
9) Select Filter Replacement Reminder and Set Run Time
Select the “Change Filter” reminder On or OFF. If selected
On, press
1975 hours in 25 hour increments. In a typical application,
200 hours (default) of run time is approximately 30 days.
After the selected time of blower operation, the thermostat
will display “Change Filter” as a reminder to change or
clean your air filter. When “Change Filter” is displayed,
press the
restart the time to the next filter change. A selection of OFF
will cancel this feature.
1. Move SYSTEM switch to EMER position, EMER will flash
on the display.
2. Press to adjust the thermostat above room temperature.
The Aux heating system will begin to operate. The Flame icon ( ) will display flashing to indicate that the Aux system
is operating.
3. Press to adjust the thermostat below room temperature.
The Aux heating system should stop operating.
and to select the time period from 25 to
and button to clear the display and
, the
Cooling System
To prevent compressor and/or property damage, if the
outdoor temperature is below 50
the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press to adjust thermostat setting below room
temperature. The blower should come on immediately on
high speed, followed by cold air circulation.
3. Press to adjust temperature setting above room
temperature. The cooling system should stop operating.
Do not allow the compressor to run unless the
compressor oil heaters have been operational for 6
hours and the system has not been operational for at
least 5 minutes.
o
F, DO NOT operate
5
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