White Rodgers 1F95Ez 0671 Emerson Blue Easy Reader Thermostat Installation Instructions 1F95EZ_0671_37 6986C

Emerson Thermostat 1F95EZ-0671 0037-6986

2015-03-28

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Page Count: 8

To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
CAUTION
!ATTENTION: MERCURY NOTICE
This product does not contain mercury. However, this
product may replace a product that contains mercury.
Mercury and products containing mercury must not be
discarded in household trash. Do not touch any spilled
mercury. Wearing non-absorbent gloves, clean up any
spilled mercury and place in a sealed container. For
proper disposal of a product containing mercury or a
sealed container of spilled mercury, place it in a suitable
shipping container. Refer to www.thermostat-recycle.org
for location to send product containing mercury.
Index Page
Installation 2
Wiring Connections 2
Wiring Diagrams 3
Thermostat Quick Reference 4
Installer Configuration Menu 5
Operating Your Thermostat 7
Troubleshooting 8
Model Programming Choices
1F95EZ-0671 Non-Programmable 7 Day
Blue Easy Reader Thermostat
www.white-rodgers.com
www.emersonclimate.com
PART NO. 37-6986C
Replaces 37-6986B
1407
Single Stage, Multi-Stage, Heat Pump
Installation Instructions for Model:
APPLICATIONS
THERMOSTAT APPLICATION GUIDE
1F95EZ-0671 Thermostat
SPECIFICATIONS
Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING THIS
CONTROL COULD CAUSE PERSONAL INJURY AND/OR
PROPERTY DAMAGE.
Electrical Rating:
Battery Power .......................... mV to 30 VAC, NEC Class II, 50/60 Hz or DC
Input-Hardwire ......................... 20 to 30 VAC
Terminal Load ............................. 1.5A per terminal, 2.5A maximum all terminals combined
Setpoint Range ............................ 45 to 99°F (7 to 32°C)
Rated Differentials: Fast Med. Slow
Heat (Single Stage/Multi Stage) ............ 0.4 °F 0.6 °F 1.7 °F
Cool (Single Stage/Multi Stage) ............ 0.9 °F 1.2 °F 1.7 °F
Heat Pump ............................ 0.9 °F 1.2 °F 1.7 °F
Aux. Heat ............................. 0.6 °F – 1.7 °F
Operating Ambient.......................... 32°F to +105°F (0 to +41°C)
Operating Humidity ......................... 90% non-condensing max.
Shipping Temperature Range ................. -40 to +150°F (-40 to +65°C)
Dimensions Thermostat...................... 4-3/16"H x 6-1/2"W x 1-5/8"D
Thermostat
Configuration Options
Thermostat
Applications
Maximum
Stages
Heat/Cool
Single Stage 1
No Heat Pump (SS1)
Gas, Oil, Electric, Heat Only,
Cool Only or Heat/Cool
Systems, 2 or 3 wire Hydronic
Zone (Hot Water or Steam)
Systems, 24 Volt or Millivolt
1/1
Multi Stage 2
No Heat Pump (MS2) 2/2
Heat Pump 1
Single Stage Compressor
Heat Pump (HP1)
Single Stage Compressor
Heat Pump Systems - up to 2
Stages Aux./Emergency Heat
3/1
Heat Pump 2
Two Stage or Two
Compressor Heat Pump
(HP2)
Two Stage or Two Compressor
Heat Pump systems - up to 2
Stages Aux./Emergency Heat
4/2
2
Remove Old Thermostat
Before removing wires from old thermostat, mark wires for
terminal identification so the proper connections will be made
to the new thermostat.
Installing New Thermostat
1. Pull the thermostat body off the thermostat 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.
3. Move base out of the way. Drill mounting holes. If you
are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure the base.
4. Fasten base snugly to wall using mounting holes shown
in Figure 1 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.
5. Connect wires to terminal block on base using appropriate
wiring schematic.
6. Push excess wire into wall and plug hole with a fire
resistant material (such as fiberglass insulation) to prevent
drafts from affecting thermostat operation.
7. Install 2 "AA" alkaline batteries.
8. Carefully line the thermostat up with the base and snap
into place.
Battery Location
2 "AA" alkaline batteries are included with the thermostat.
Install the batteries before snapping the thermostat on the
base. Install the batteries in the rear along the top of the
thermostat (see Fig. 1).
To replace batteries, set system to OFF and remove
thermostat from wall. For best results, use a premium brand
"AA" alkaline battery such as Duracell® or Energizer®. 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.
WIRING CONNECTIONS
Refer to equipment manufacturers' instructions for specific
system wiring information. After wiring, see CONFIGURA-
TION section for proper thermostat configuration.
Wiring diagrams shown are for typical systems and describe
the thermostat terminal functions.
WARNING
!
Thermostat installation and all components of the
control system shall conform to Class II circuits per
the NEC code.
INSTALLATION
Figure 1 – Thermostat Base Multi-Stage 1F95EZ-0671
Rear view of thermostat
2 "AA" Batteries
Po
wer Stealing
Switches
*
* A1 For Damper Control Not Applicable To This Model.
Place Level
across Mounting Tabs
(for appearance only)
Mounting
Hole
Mounting
Hole
Place Level
across Mounting Tabs
(for appearance only)
Power Stealing Switch
The Power Stealing Switches (Fig. 1) should be left in the
"On" position for most systems.
Power Stealing Assist is very reliable to increase battery life,
drawing a small amount of power from the HVAC system. But
on a small number of heating or cooling systems with high
impedance electronic modules you may observe one of the
following conditions to indicate that Power Stealing Assist is
incompatible:
1. The furnace draft inducer motor may run with no call for
heat.
2. The furnace fan may turn on with no call for heat or may
not turn off.
3. The furnace may not turn off when the call for heat ends.
4. The air conditioner may not turn off when the call for cool
ends.
If the Power Stealing Assist method is not compatible with
your system, place the Power Stealing Switches to "Off". This
cancels Power Stealing Assist, operates the thermostat on
batteries and corrects the condition.
Terminal
Designation Single Stage Multi Stage Heat Pump 1 Heat Pump 2
O/B Changeover Terminal Energized in Heat (B) or Cool (O) for Heat Pump or Damper Systems
Y2 No Output 2nd Stage Compressor No Output 2nd Stage Compressor
Y Cool Mode
Compressor Relay
Cool Mode 1st Stage -
Compressor
Heat and Cool Mode 1st Stage -
Compressor
Heat and Cool Mode 1st Stage -
Compressor
G Fan Relay
RC Power for Cooling
RH Power for Heating
C "Common wire from secondary side of cooling (Optional). Required for fault indication, continuous backlight
operation or remote temperature sensor operation"
6 Powered closed 3rd wire for
3-wire zone valve
No Output No Output No Output
W/E Heat Mode Heat Mode 1st Stage Heat Mode 2nd Stage,
Emergency Mode 1st Stage
Heat Mode 3rd Stage,
Emergency Mode 1st Stage
W2 No Output Heat Mode 2nd Stage Heat Mode 3rd Stage,
Emergency Mode 2nd Stage
Heat Mode 4th Stage,
Emergency Mode 2nd stage
L System Diagnostic Terminal - Displays Call for Service
3
WIRING DIAGRAMS
Figure 2 – Single Stage, SS1, or Multi-Stage, MS2, System (No Heat Pump)
with Single Transformer (Gas, Oil or Electric)
Single
Stage 1
(SS1)
Multi-
Stage 2
(MS2)
O
Energized Constantly
in
Cool Mode
B
Energized Constantly
in Heat, Off,
Emergency
Mode
No
Output
Cool
Mode
2nd
Stage
Cool Mode
1st Stage
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
No Output
Heat Mode
2nd Stage
Heat
Mode
1st Stage
Optional
24 Volt
(Com-
mon)
24 Volt
(Hot)
Cool
System
YG
W/E C 6
LRC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120V
AC
24 Volt
(Hot)
Heat
RH
Y2 W2
Jumper
Diagnostic
Indicator
Input
or
System
Malfunction
Switch
Input
Comfort Alert II Module
or Similar System
Diagnostic Module
See Module Instructions
for details
O/B
*
* Common connection required for diagnostic or malfunction indication.
Single Stage
3-wire
Zone Valve
application
Blower/Circulator
Fan Energized
Opens
Valve
(4)
Constant
24 Volt
(Com-
mon)
24 Volt
(Hot)
Cool
System
6YWC
RC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
24 Volt
(Hot)
Heat
(5)
RH
G
Jumper
Closes
Valve
(6)
Figure 5 – 3-Wire (SPDT) Heat Only Zone Valve Wiring
Figure 3 – Single Stage, SS1, or Multi-Stage, MS2, System (No Heat Pump)
with Two Transformer (Gas, Oil or Electric)
Single
Stage 1
(SS1)
Multi-
Stage 2
(MS2)
No
Output
Cool
Mode
2nd
Stage
Cool Mode
1st Stage
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
No Output
Heat Mode
2nd Stage
Heat
Mode
1st Stage
Optional
24 Volt
(Com-
mon)
Diagnostic
Indicator
(Optional)
24 Volt
(Hot)
Cool
System
YG
W/E C
LRC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120V
AC
24 Volt
(Hot)
Heat
RH
120V
AC
Remove Jumper Wire
between RH & RC
HOT
24VAC
NEUTRAL
CLASS II
TRANSFORMER
HEATING
COOLING
Y2 W2
Jumper
O/B
O
Energized Constantly
in
Cool Mode
B
Energized Constantly
in Heat, Off,
Emergency
Mode
*
* Common connection required for diagnostic or malfunction indication.
Figure 4 – Heat Pump Systems, HP1 (Single Stage Compressor System with Gas or Electric backup),
HP2 (Multi-Stage Compressor or Two Compressor System with Gas or Electric backup)
Heat Pump 1
(HP1)
Heat Pump 2
(HP2)
O
Energized in
Cool Mode
B
Energized in
Heat, Off,
Emergency
Mode
No
Output
2nd
Stage
(Com-
pressor)
Heat and
Cool Mode
1st Stage
(Compressor)
Blower/
Circulator Fan
Energized on
Call for Heat
or Cool.
Set Elect/Gas
Option for
Emergency
mode
Heat Mode - 3rd
Stage, Emergency
Mode - 2nd Stage
Heat Mode-4th
Stage. Emergency
Mode - 2nd Stage
Heat Mode - 2nd
Stage, Emergency
Mode - 1st Stage
Heat Mode - 3rd
Stage, Emergency
Mode - 1st Stage
Optional
24 Volt
(Com-
mon)
Diagnostic
Indicator
or System
Malfunction
Switch
24 Volt
(Hot)
Cool
System
Y+W/E C
L6
RC
CLASS II
HOT
24VAC
NEUTRAL
120V
24 Volt
(Hot)
Heat
RH
Y2 +W2 G
Comfort Alert II Module
or Similar System
Diagnostic Module
for details
O/B
+Note: Dual Fuel option
de-energizes Heat mode
stage 1 (compressor)
when auxiliary heat
is energized
+Note: Dual Fuel option
de-energizes Heat mode
stage 1 (compressor)
when auxiliary heat
is energized
+Note: Dual Fuel option
de-energizes Heat mode
stage 1 (compressor)
when auxiliary heat
is energized
+Note: Dual Fuel option
de-energizes Heat mode
stage 1 (compressor)
when auxiliary heat
is energized
*
* Common connection required for diagnostic or malfunction indication.
+ Dual Fuel option, if selected turns off compressor(s) when Auxiliary stages energize.
4
Programming and Configuration Items
1 “Heat" “A/C” “Off” identies button. When lled indi-
cates system mode selected.
2 " " indicates thermostat congured for Heat Pump.
"Aux" indicates Auxiliary (Emergency) stage is selected.
3 "Adv Day" identies button when in schedule mode.
4 "Time" identies button when in schedule mode.
5 "Fan" identies button. When lled indicates Fan is on.
6 "Run" identies button to begin normal operation.
7 "Sched" identies button to be used during program-
ming or "Run Sched" identies button to return to
normal operation.
8 "Hold" "Copy" "Menu" identies button.
9 "Limit" indicates temperature is adjusted to the limit set
in the conguration menu.
THERMOSTAT QUICK REFERENCE
Home Screen Description
Figure 6 – Home Screen Display
Figure 7 – Programming & Configuration Items
10 "Setting" indicates the setpoint temperature.
11 "Hold Temp" indicates temporary hold or "Hold" indi-
cates hold mode.
12 "Morn" "Day" "Eve" "Night" indicates period being
programmed or current program in Run mode.
13 "A" "P" indicates time as Morning (A) or Evening (P).
14 "Mon - Sun" indicates day of week.
15 "Month" "Year" "Date" indicates the Month Year or
Date when setting time.
16 "Call For Service" indicates a diagnostic fault in the
heating/cooling system. It does not indicate a fault in the
thermostat.
17 "Change" indicates when batteries are low and should
be replaced.
7
6
4
1
3
17
16
15
13 12 10
8
9
2 5
14
11
Room
Temperature
Setting
Temperature
System
Indicators
Fan
Indicator
Sched or
RunSched
Button
Menu, Copy,
or Hold Button
Heat
Button
A/C or
Advance
Day Button
OFF or
Time
Button
Fan or
Run Button
Battery Level Indicato
r
Indicating the current power leve
l
of the 2 “AA” batteries
.
Full power remaining.
Half power remaining.
Change
The batteries should
be replaced at this time with 2 new
premium brand “AA”
Alkaline batteries.
(See page 2 for more details).
5
INSTALLER/CONFIGURATION MENU
With Heat or A/C selected, press and hold the Menu button for at least 5 seconds. The display will show item #1 in the
table below. Press Menu to advance to the next menu item. Press or to change a menu item options.
INSTALLER/CONFIGURATION MENU
Menu
Ref.
HP SS Press
Button
Displayed
(Factory Default) Press or
to select from listed
options
Comments
1 1 1 MENU (MS 2) HP 1, HP 2, SS 1 Selects Multi-Stage (MS 2 No Heat Pump),
Heat Pump 1 (HP 1, 1 compressor),
Heat Pump 2 (HP 2, 2 compressor or 2 speed
compressor), or Single Stage (SS 1)
2 2 2 MENU (GAS) for SS or MS
(ELE) for HP1, HP2
ELE or GAS GAS setting: furnace controls the blower
ELE setting: thermostat controls the blower
3 3 3 MENU (On) E OFF Selects Energy Management Recovery (EMR)
On or OFF.
(Not available in non-programmable mode)
4 – 4 MENU (ME) Cr Heat SL, FA Selects Adjustable Anticipation, cycle rate, Heat
(This item only appears when MS 2 or SS 1 is
selected above)
5 4 – MENU (ME) Cr A/C SL, FA Selects Adjustable Compressor Anticipation
(Heat Pump) this item only appears when
HP 1, HP 2 is selected above
6 5 5 MENU (ME) Cr A/C
or
(FA) Cr Aux Heat
SL, FA
SL
Selects Adjustable Anticipation, cycle rate, cool
(when MS 2 or SS 1 is selected above) or
Selects the cycle rate for Auxiliary stage (when
HP 1 or HP 2 is selected above)
7 6 6 MENU (OFF) CL On Selects Compressor Lockout Off or On
8 7 7 MENU Heat A/C Off
or
Aux Heat A/C Off
Heat A/C Off,
Heat Off with Fan icon,
Heat Off without Fan icon
A/C Off
System Mode Configuration
9 8 8 MENU (OFF) CO On Selects Compressor Optimization
10 9 9 MENU (On) dL OFF Selects Display Light On or OFF
11 10 10 MENU 0 HI
(current temperature)
1 HI, 2 HI, 3HI, 4 HI,
1 LO, 2 LO, 3 LO, 4 LO
Adjustable Ambient Temperature Display
12 11 11 MENU °F
(current temperature)
°C Selects Fahrenheit/Celsius Temperature Display
13 12 12 MENU (0) P 7 Defaults to P (0) non-programmable
P (7) is 7-day programming
14 13 13 MENU PS (2)
Day, Night
4
Morn, Day, Eve, Night
Selects Program periods per day:
4 = Morn, Day, Eve, Night
2 = Day, Night
(Skipped if non-programmable)
15 14 – MENU (On) FA Heat OFF Fast Heat option may be disabled by
selecting OFF. NA to SS or HP1 config.
16 15 14 MENU (On) FA A/C OFF Fast Cool option may be disabled by
selecting OFF. NA to SS or HP1 config.
17 16 15 MENU (On) dS Off Selects Automatic Daylight Saving Time option
18 17 16 MENU (99) HL Heat 62 to 98 Select's Limited HEAT Range
19 18 17 MENU (45) LL A/C 46 to 82 Select's Limited A/C Range
20 19 – MENU (0) dF 1 to 9 Selects dF (Dual Fuel) setting. 0 is Off
(If Dual Fuel option is required, a selection of 5
is recommended)
MENU (60) Cd 0 to 99 Selects compressor delay in seconds when dF
is greater than 0
21 20 18 MENU (o) A/C On Heat (b) Selects operation of the reversing valve terminal
(O/B) output as an O or B terminal
22 21 19 MENU Returns to Normal Operation
6
INSTALLER/CONFIGURATION MENU
1) This control can be configured for:
MS 2 – Multi-Stage System (no heat pump)
HP 1 – Heat Pump with one stage of compressor, Gas
or Electric backup
HP 2 – Heat Pump with two stage compressor or two
compressor system, Gas or Electric backup
SS 1 – Single Stage System
2) GAS or Electric (ELE) fan operation. If the heating system
requires the thermostat to energize the fan, select ELE.
Select GAS if the heating system energizes the fan on a
call for heat.
3) Energy Management Recovery: (this step is skipped if
configured to be non-programmable).
Energy Management Recovery (E) On enables the
thermostat to start heating or cooling early to make the
building temperature reach the program setpoint at the
time you specify. Heating will start 5 minutes early for
every 1° of temperature required to reach setpoint.
Example: E On is selected and your heating is
programmed to 65° at night and 70° at 7 AM. If the
building temperature is 65°, the difference between
65° and 70° is 5°. Allowing 5 minutes per degree, the
thermostat setpoint will change to 70° at 6:35 AM. Cooling
and Heat Pump systems allow more time per degree,
because it takes longer to reach set temperature.
4, 5 & 6) Cycle Rate Selection – The factory default setting for
Heat and Cool modes, SS1, MS2, is medium cycle (ME). For
Heat Pump, HP1, HP2, the default setting is medium (ME).
For Aux, the default setting is fast cycle (FA). To change cycle
rate, press the or button.
Cycle rate differentials for different settings are:
7) Select Compressor Lockout CL OFF or ON – Selecting
CL ON will cause the thermostat to wait 5 minutes be-
tween 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.
8) System Mode Configuration – This thermostat is
configured for Heat and Cool (SYSTEM switch with Heat
A/C Off) default. It can also be configured for Heat only with
fan (Heat Off fan), Heat only without fan (Heat Off) or Cool
only (Cool Off).
9) Compressor Optimization – CO provides a delay in
circulator fan operation after the compressor turns on or
off. With CO selected ON, when the compressor turns
on (for a call for heat in heat pump or a call for cool) the
fan will be delayed for five seconds before turning on to
allow the air to be heated or cooled. After the compressor
turns off for call for cool, the fan will continue to run for 20
seconds to circulate all of the cooled air. If CO is set to
OFF, there will be no delay in fan operation.
10) Select Backlight Display – The display backlight improves
display contrast in low lighting conditions. When the "C"
terminal is powered, selecting backlight dL ON will keep the
light on continuously. Select backlight OFF will turn the light
on momentarily after any button is pressed. When the "C"
terminal is not powered, the light will be on momentarily
after any button is pressed no matter whether the backlight
is selected ON or OFF.
11) 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 dis-
play temperature to match your previous thermostat. The
current or adjusted room temperature will be displayed.
12) Select F° or C° Readout – Changes the display readout
to Celsius or Fahrenheit as required.
13) Program Options: Selects configuration for 7 day (7) or
non-programming (0) mode. The default setting is 0, indi-
cating non-programming. The programs per week can be
changed by pressing the or buttons. A selection
of 0 days for non-programmable will eliminate the need for
EMR, and that step in the menu will be skipped.
14) Program Steps per day – This control can be configured
for 4 or 2 program steps per day. Default is "2 PS" and
can be toggled between 4 PS and 2 PS.
15 & 16) Select Fast Second Stage ON or OFF – Heat
pump or Multi-stage only, in the run mode, with the fast
Heat feature enabled (On FA Heat), if the Heat setpoint
temperature is manually raised by 3°F (2°C) or more
above the actual temperature using the second stage
will energize immediately. With FA OFF, second stage will
not energize until the setpoint temperature is 1°F or more
above actual temperature for more than ten minutes. The
Fast Cool feature (FA Cool) provides the same controls
when the setpoint temperature is lowered.
17) Select Daylight Saving Time Calculation – This feature
will allow the thermostat to calculate the DST automati-
cally and apply it to the Real Time Clock display. Default
On. Use or touch keys to select the feature OFF.
18) Limited Heat Range – This feature provides a maximum
setpoint temperature for heat. The default setting is 99°F. It
can be changed between 62°F and 98°F by pressing the
or button.
19) Limited Cool Range – This feature provide a minimum
setpoint temperature for cool. The default setting is 45°F. It
can be changed between 46°F and 82°F by pressing the
or button.
20) Select Dual Fuel Setting (dF) – HP1 or HP2 systems. 0
is default OFF for Elect. Aux. If your system has a fossil
fuel (gas or oil) Auxiliary heat, select 1 to 9. See Dual Fuel
setting and compressor delay on the following page.
Select Compressor Delay (Cd) – Available only if dF 1 to
9 is selected above. After the auxiliary heat is turned on,
the compressor(s) shut down is delayed for the time se-
lected (in seconds). This delay is factory set to 60, but can
be set in the range of 0 to 99 using or buttons.
21) Select Reversing Valve Output – The O/B option is
factory set at "O" position. This will accommodate the
majority of heat pump applications, which require the
changeover relay to be energized in COOL. If the thermo-
stat 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 option should be
set at "B" position.
MODE Fast Medium Slow
FA ME SL
Heat (SS1, MS2) 0.4°F 0.6°F 1.7°F
Cool (SS1, MS2) 0.9°F 1.2°F 1.7°F
Heat Pump (HP1, HP2) 0.9°F 1.2°F 1.7°F
AUX (HP1, HP2) 0.6°F - 1.7°F
7
OPERATING YOUR THERMOSTAT
If at any time during testing your system does not operate
properly, contact a qualified service person.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. Turn on power to system.
2. Press FAN button. The display will change from " " to
"Fan" and the blower should begin to operate.
3. Press FAN button again. The display will change from "Fan"
to " " outlined and the blower should stop immediately.
To prevent static discharge problems, touch side of
thermostat to release static build-up before touching
any keys.
NOTE
Check Thermostat Operation
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.
CAUTION
!
Heating System
1. Press the HEAT button to select HEAT. 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. A click will be heard from the thermostat and
the heat system should begin to operate. If the system
configuration is set to HP1 or HP2 and setpoint tempera-
ture display is flashing, the 5 minute compressor lockout
feature is operating (see Configuration menu, item 7).
3. If your system configuration is set at MS2, HP2 or HP1,
adjust temperature setting to 3° above room temperature.
The thermostat will click and the second stage will begin
to operate.
4. Press to adjust the thermostat below room tempera-
ture. The thermostat will click several times as stages
de-energize. The heating system should stop operating.
Second Stage Time Delay
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 ther-
mostat 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 70o
and the room temperature is 70o with the equipment using
only the first stage of heat. Since the equipment is keep-
ing the temperature within 1o 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
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
CAUTION
!
Cooling System
1. Press A/C button to select A/C.
2. Press to adjust thermostat setting below room
temperature. The blower should come on immediately at
high speed, followed by cold air circulation. If the setpoint
temperature display is flashing, the compressor lockout
feature is operating (see Configuration menu, item 7).
3. Adjust temperature setting to 3° below room temperature.
A click from the thermostat will be heard and the second
stage cooling should begin to operate.
4. Press to adjust the temperature setting above room
temperature. The thermostat will click several times and
the cooling system should stop operating.
Dual Fuel Setting
(Configuration Menu item 20)
Heat Pumps with gas or oil furnace Auxiliary heat are called
Dual Fuel systems. Step 20 in the configuration menu is a
Dual Fuel (dF) option that uses software logic to determine
when to switch to gas heat and shut down the compressor.
This eliminates the need for a separate fossil fuel kit.
To configure the thermostat for Dual Fuel, select a setting
from 1-9. An initial selection of 5 is recommended. A higher
number will provide a smaller stage separation so the Aux-
iliary heat will start sooner providing more comfort. A lower
number will provide a larger stage separation delaying the
start of the Auxiliary heat providing more economy. A selec-
tion of -0- cancels the dual fuel option and is used for heat
pump systems with electric heat auxiliary (non-dual fuel
systems).
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 calcu-
lates that first stage cannot make temperature in a reason-
able time, the second stage will come on sooner. This built in
function automatically optimizes the use of additional stages
of heat or cool.
Auxiliary (Emergency) System
AUX bypasses the Heat Pump to use the heat source wired
to terminal W/E on the thermostat. AUX is typically used
when compressor operation is not desired, or you prefer
back-up heat only.
1. Press and hold HEAT button for at least 5 seconds. "Aux"
will change to "Aux".
2. Press to adjust thermostat setting above room tem-
perature. The Auxiliary heating system will begin to operate.
3. Press to adjust the thermostat below room tempera-
ture. The Auxiliary heating system should stop operating.
4. To return to Heat Pump mode press “HEAT” button. "Aux"
will change to " "
Symptom Possible Cause Corrective Action
No Heat/No Cool/No Fan
(common problems)
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
4. Loose connection to thermostat or system.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage safety
interlock or door switch.
Tighten connections.
No Heat 1. Pilot light not lit.
2. Furnace Lock-Out Condition. Heat
may also be intermittent.
3. Heating system requires service or
thermostat requires replacement.
Re-light pilot.
Many furnaces have safety devices that shut down when
a lock-out condition occurs. If the heat works intermittently
contact the furnace manufacturer or local HVAC service
person for assistance.
Diagnostic: Set System to HEAT and raise the setpoint
above room temperature. Within a few seconds the
thermostat should make a soft click sound. This sound
usually indicates the thermostat is operating properly. If
the thermostat does not click, try the reset operation listed
above. If the thermostat does not click after being reset
contact your heating and cooling service person or place
of purchase for a replacement. If the thermostat clicks,
contact the furnace manufacturer or a HVAC service
person to verify the heating is operating correctly.
No Cool
1. Cooling system requires service or
thermostat requires replacement.
Same as diagnostic for No Heat condition except set the
thermostat to COOL and lower the setpoint below the
room temperature. There may be up to a five minute delay
before the thermostat clicks in Cooling.
Heat, Cool or Fan
Runs Constantly
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. FAN Switch set to Fan ON.
Check each wire connection to verify they are not shorted
or touching together. No bare wire should stick out from
under terminal block. Try resetting the thermostat as de-
scribed above. If the condition persists the manufacturer
of your system or service person can instruct you on how
to test the Heat/Cool system for correct operation. If the
system operates correctly, replace the thermostat.
Thermostat Setting &
Thermostat Thermometer
Disagree
1. Thermostat thermometer setting
requires adjustment.
The thermometer can be adjusted +/- 4 degrees. See
Temperature Display Adjustment in the Configuration
Menu section.
Furnace (Air Conditioner)
Cycles Too Fast or Too Slow
(narrow or wide
temperature swing)
1. The location of the thermostat and/or
the size of the Heating System may
be influencing the cycle rate.
Digital thermostats provide precise control and cycle
faster than older mechanical models. The system turns
on and off more frequently but runs for a shorter time
so there is no increase in energy use. If you would like
an increased cycle time, choose SL for slow cycle in the
Configuration menu reference, steps 4 through 6. If an ac-
ceptable cycle rate is not achieved, contact a local HVAC
service person for additional suggestions.
Reset Operation
Note: When thermostat is reset, installer configuration menu settings and programming will reset to factory settings.
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat
by removing the wires from terminals RH and RC (do not short them together) and removing batteries for 2 minutes. After
resetting the thermostat, replace the wires and batteries. If the thermostat has been reset and still does not function correctly
contact your heating/cooling service person or place of purchase.
Note: Be sure to review the installer configuration menu settings.
To reset the programming, clock and configuration settings, press the , and FAN button simultaneously. The
thermostat should go blank and then all segments will be displayed momentarily.
TROUBLESHOOTING
HOMEOWNER HELP LINE: 1-800-284-2925
White-Rodgers is a business
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
www.white-rodgers.com
www.emersonclimate.com

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