White Rodgers 37-7237A User Manual
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.
APPLICATIONS
Blue 4” Universal Thermostat with
Automatic Heat/Cool Changeover Option
Single Stage, Multi-Stage or Heat Pump
Installation and Operating Instructions for Model:
Model Programming Choice
1F83-0471
Non-Programmable
THERMOSTAT APPLICATION GUIDE
Description
Heat Pump (No Aux. or Emergency Heat) Yes
Heat Pump (with Aux. or Emergency Heat) Yes
Systems with up to 2 Stages Heat, 2 Stages Cool Yes
Heat Only Systems (with optional fan switch) Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces Yes
Cool Only Systems Yes
Gas or Oil Heat Yes
Electric Furnace
Hydronic (Hot Water) Zone Heat – 2 Wires Ye s
Hydronic (Hot Water) Zone Heat – 3 Wires Ye s
Compressor with Comfort Alert II Module (1F85CA only) Yes
Yes
1F83-0471 Thermostat
SPECIFICATIONS
Electrical Rating:
Battery Power .................................................... mV to 30 VAC, NEC Class II, 50/60 Hz or DC
Input-Hardwire ................................................... 20 to 30 VAC
Terminal Load ........................................................... 1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range ......................................................... 45° to 90°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° 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 ............................................ 3-7/8”H x 5-1/8”W x 1-1/4”D
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Index Page
Installation 2
Wiring Connections 2
Wiring Diagrams 3
Thermostat Quick Reference 4
Installer Configuration Menu 5
Operating Your Thermostat 7
Troubleshooting 7
www.white-rodgers.com
www.emersonclimate.com
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.white-rodgers.com for location to
send product containing mercury.
PART NO. 37-7237A
1117
1
INSTALLATION
Mounting
Hole
Mounting
Hole
Place Level
across
Mounting Tabs
(for appearance only)
Place Level
across
Mounting Tabs
(for appearance only)
WARNING
!
Thermostat installation and all components of the
control system shall conform to Class II circuits per
the NEC code.
Remove Old Thermostat
A standard heat/cool thermostat consists of three basic parts:
1. The cover, which may be either a snap-on or hinge type.
2. The base, which is removed by loosening all captive
screws.
3. The switching subbase, which is removed by unscrewing
the mounting screws that hold it on the wall or adapter
plate. Before removing wires from old thermostat,
label each wire with the terminal designation from
which it was attached. Disconnect the wires from the
old thermostat one at a time. Do not let wires fall back
into the wall.
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 snug ly, use plastic screw anchors to secure the base.
4. Fasten base snugly to wall using mounting holes shown
in Figure 2 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.
5. Connect wires to terminal block on base.
6. Push excess wire into wall and plug hole with a fire re-
sistant material (such as fiberglass insulation) to prevent
drafts from affecting thermostat operation.
7. Carefully line the thermostat up with the base and snap
into place.
Figure 1 – Battery door shown open
“AA” Alkaline Batteries
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, replace all batteries with new premium brand
alkaline batteries such as Duracell
®
or Energizer®. We recom-
mend 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 batter-
ies are not replaced.
Figure 2 – Thermostat base and rear view of thermostat
Batteries
2 “AA” alkaline batteries are included with the thermostat.
To install the batteries, pull the battery door as 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. To replace the
batteries, set system to OFF.
WIRING CONNECTIONS
Refer to equipment manufacturers’ instructions for specific
system wiring information. After wiring, see CONFIGURATION
section for proper thermostat configuration.
2
TERMINAL DESIGNATION DESCRIPTIONS
Terminal
Designation Description
L .............. Heat pump malfunction indicator for systems
with malfunction connection or Comfort Alert signal
O .............. Changeover valve for heat pump energized
constantly in cooling
B .............. Changeover valve for heat pump energized
constantly in heating
Y .............. Compressor Relay
Y2 ............. 2nd Stage Compressor
Refer to figure 3 through 6 for wiring diagram specifications.
Terminal
Designation Description
W/E ............Heat Relay/Emergency Heat Relay (Stage 1)
W2 .............2nd Stage Heat (3rd Stage Heat in HP 2)
G ..............Fan Relay
RH .............Power for Heating
RC .............Power for Cooling
C ..............Common wire from secondary side of cooling system
transformer or heat only system transformer
6...............3 Wire Zone Valve – Energized when no call for Heat
WIRING DIAGRAMS
Heat Pump Connections
If you do not have a heat pump system, refer to figures 4-6.
Refer to equipment manufacturers’ instructions for specific
system wiring information.
You can configure the thermostat for use with the following
heat pump systems.
System
Heat Pump 1
(HP1)
Heat Pump 2
(HP2)
Comfort Alert II Module
or Similar System
Malfunction Module
Figure 3 – Heat Pump Systems
L
Fault Indicator
or System
Malfunction
Switch
O/B
O
Energized in
Cool Mode
B
Energized in
Heat, Off,
Emergency
Mode
Y
Heat and
Cool Mode
1st Stage
(Compressor)
Y2
No
Output
2nd
Stage
(Com-
pressor)
W/E
Emergency
Mode
1st Stage
Jumper
Heat Mode
2nd Stage.
Emergency
Mode 2nd
Heat Mode
3rd Stage.
Emergency
Mode 2nd
Single Stage and Multi-Stage Connections
Refer to equipment manufacturers’ instructions for specific
system wiring information.
This thermostat is designed to operate a single-transformer
or two-transformer system.
You can configure the thermostat for use with the following
fossil fuel systems:
Figure 4 – Single Stage or Multi-Stage System (No Heat Pump) with Single Transformer
L
System
Single
Stage 1
(SS1)
Multi-
Stage 2
(MS2)
Comfort Alert II Module
or Similar System
Malfunction Module
Fault
Indicator
or
System
Malfunction
Switch
O/B
O
Energized Constantly
in Cool Mode
B
Energized Constantly
in Heat, Off,
Emergency
Mode
Y
Cool Mode
1st Stage
Y2
No
Output
Cool
Mode
2nd
Stage
Heat
Mode
1st Stage
HEAT PUMP TYPE 1 (HP 1). Single stage compressor
system; gas or electric backup.
HEAT PUMP TYPE 2 (HP 2). Multi-stage compressor or two
compressor system with gas or electric backup.
After wiring, see INSTALLER CONFIGURATION section for
proper thermostat configuration.
Jumper
C
W2
G
RC
RH
NOTE: If your system does
not provide an E connection,
jumper W2 to W/E to use
the Auxiliary Heat in the
Emergency Mode.
* Common connection
required for fault or
malfunction indication.
120VAC
Stage
Stage
Blower/
Circulator
Fan Energized
on Call for
Heat or Cool.
Set Elect/Gas
Option for
Emergency
Mode
24 Volt
(Hot)
Heat
24 Volt
(Hot)
Cool
Optional*
24 Volt
(Com-
mon)
NEUTRAL
24VAC
HOT
CLASS II
TRANSFORMER
SINGLE STAGE (SS 1) gas, oil or electric.
MULTI-STAGE (MS 2) gas, oil or electric.
After wiring, see INSTALLER CONFIGURATION section for
proper thermostat configuration.
Jumper
W/E
No Output
Heat Mode
2nd Stage
W2
G
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
RH
24 Volt
(Hot)
Heat
RC
24 Volt
(Hot)
Cool
C
Optional*
24 Volt
(Com-
mon)
NEUTRAL
24VAC
HOT
* Common connection
required for fault or
malfunction indication.
120VAC
CLASS II
TRANSFORMER
120VAC
HEATING
CLASS II
TRANSFORMER
Figure 5 – Single Stage or Multi-Stage System (No Heat Pump) with Two Transformers
Remove Jumper Wire
Jumper
between RH & RC
System
Single
Stage 1
(SS1)
Multi-
Stage 2
(MS2)
NEUTRAL
24VAC
HOT
L
Fault
Indicator
(NOT
USED)
O/B
O
Energized Constantly
in Cool Mode
B
Energized Constantly
in Heat, Off,
Emergency
Mode
Y
Cool Mode
1st Stage
Y2
No
Output
Cool
Mode
2nd
Stage
W/E
Heat
Mode
1st Stage
W2
No Output
Heat Mode
2nd Stage
Fan Energized
G
Blower/
Circulator
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
RH
24 Volt
(Hot)
Heat
RC
24 Volt
(Hot)
Cool
C
Optional
24 Volt
(Com-
mon)
NEUTRAL
24VAC
HOT
CLASS II
TRANSFORMER
120VAC
COOLING
Figure 6 – 3-Wire (SPDT) Heat Only Zone Valve Wiring
Jumper
W
Y
Opens
Valve
(4)
G
Blower/Circulator
Fan Energized
RH
24 Volt
(Hot)
Heat
(5)
RC
24 Volt
(Hot)
Cool
C
Constant
24 Volt
(Common)
NEUTRAL
24VAC
HOT
CLASS II
TRANSFORMER
System
Single Stage
3-wire
Zone Valve
application
6
Closes
Valve
(6)
NOTE: If continuous backlight or
hardwired power input are desired but
do not function in both HEAT and COOL
modes, cut the heating transformer 24V
wires and tape off. Connect the neutral
circuit disconnected from the heating
transformer to the neutral circuit of the
cooling transformer. Disconnect the wire
to the RH terminal and install a jumper
between RH and RC. Depending on
the system requirements, replace the
cooling transformer with a 75VA class II
transformer if needed.
120VAC
3
Room
Setting
THERMOSTAT QUICK REFERENCE
Home Screen Description
Figure 7 – Home Screen Display
Displays the power level of
the 2 “AA” batteries:
indicates good power level
indicates batteries at about
half power. “Change ” indicates
batteries are low and should be
replaced with 2 new premium brand
“AA” Alkaline batteries.
(See page 2 for more details)
Heat
SYSTEM
System
Indicator
Temperature
Set
FAN
Auto
Fan
Indicator
Temperature
Menu
Programming and Configuration Items
“System On” indicates when heating or cooling stage
1
is energized. “+2” flashing indicates when a second
stage is energized, +2 not flashing when “Aux” is energized.
2
The word “Set” indicates the setpoint temperature.
Displays “Change Filter” when the system has run
3
for the programmed filter time period as a reminder to
change or clean your filter.
Displays System Mode (Heat, Emer, Auto, Cool, Off)
4
in Menu Mode.
5
Displays Fan Mode (On, Auto) or “Run Sched” in
Menu Mode.
6
Displays “Menu”.
7
Displays “Save” when Cool Savings
Displays “Heat Pump” to indicate thermostat is config-
8
TM
is working.
ured for Heat Pump.
9
Displays
“Cool Savings” when in the Cool Mode if Cool Savings
10
(light bulb) in non-programmable mode.
has been enabled in the menu.
“Call For Service” indicates a fault in the heating/
11
cooling system, it does not indicate a fault in the
thermostat.
12
Flashes “LOC” when keypad lockout is enabled.
In Configuration Menu, shows screen number. If blank,
13
thermostat is earlier model and requires instruction sheet
37-7149B.
Figure 8 – Programming & Configuration Items
12 13
2
Mo Tu We Th Fr Sa Su
11
3
1
8
Month Call For Service
Change
Filter
System On 2
Heat Pump
SYSTEM
Heat Emer Auto
Cool O Time
P Date
Temp
On Auto
Run Sched
4
FAN
5
Save
Set
Cool Savings
Schedule
Year
Hold
Auto Sched
Run
Menu
6
7
9
10
4
INSTALLER/CONFIGURATION MENU
To enter the Configuration Menu, SYSTEM must be set to HEAT, COOL or EMER. Press the Menu button for at least 5
seconds. The display will show item #1 in the table below. Press Menu button to advance to the next menu item. Press
to change a menu item.
INSTALLER/CONFIGURATION MENU
MENU
SCREEN
NUMBER
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18 HP2
19
20
21
22
MS/SSPRESS
HP
BUTTON
MENU (Off)
MENU (000) Lk 001 to 999 Selects Keypad lockout combination number
MENU (MS 2) HP 1, HP 2, SS 1 Selects Multi-Stage (MS 2 No Heat Pump),
MENU (GAS) for SS or MS
MENU (0) CS 1, 2, 3, 4, 5, 6 Selects Cool Savings
MENU (ME)
MENU (ME)
MENU (ME)
MENU (FA)
MENU (OFF) CL CL On Compressor Lockout Time Delay
MENU Heat Auto
MENU (On) dL dL OFF Selects Display Light On or OFF
MENU 0
MENU
MENU (90) L Heat L 62 to L 89 Selects Limited HEAT Range
MENU (45) L Cool L 46 to L 82 Selects Limited COOL Range
MS MENU (On) Heat FA OFF Fast Heat option may be disabled by
MENU (On) Cool FA OFF Fast Cool option may be disabled by
MENU (OFF) CA On Selects active Comfort Alert On or OFF.
MENU (OFF) Change Filter On Selects Filter Change-out Indicator On or OFF.
MENU (200 h) Change Filter 25-1975 h Change Filter time in 25 hour increments. This
MENU (o) Cool On (b) Heat On Selects operation of the reversing valve termi-
DISPLAYED
(FACTORY DEFAULT)
Lk
(ELE) for HP
CR Heat
CR Cool
CR Heat Pump
CR Emer
Cool Off
(current temperature)
°F °C
Press
to select from listed
or
options
L Total Keypad lockout
ELE or
GAS
SL, FA Adjustable Anticipation:
SL, FA
SL, FA Adjustable Anticipation (Heat Pump) (only
SL, FA
SL
Heat Cool Off,
Heat Off with Fan icon,
Heat Off without Fan icon,
Cool Off, Auto Off
1 HI, 2 HI, 3 HI, 4 HI,
1 LO, 2 LO, 3 LO, 4 LO
COMMENTS
(Not available on earlier models)
Heat Pump 1 (HP 1, 1 compressor), or
Single Stage (SS 1), Heat Pump 2 (HP 2,
2 compressor or 2 speed compressor)
GAS setting: furnace controls the blower
ELE setting: thermostat controls the blower
Value 1 (low) to 6 (high),
Value 0 Disables Feature
Selects heating cycle rate for MS or SS
Adjustable Anticipation:
Selects cool cycle rate
when heat pump selected in #1)
Selects the cycle rate for Emergency
mode and Auxiliary stage if Heat Pump
is selected in item 1.
Select System Switch Conguration
with Automatic Changeover capability.
Adjustable Ambient Temperature Display
Selects Fahrenheit/Celsius
Temperature Display
selecting OFF. NA to SS cong.
NA to Cool only system.
selecting OFF. NA to SS cong.
NA to Heat only system.
Requires CA II Module.
(Not available on earlier models)
menu only appears if On is selected in above.
nal (O/B) output as an O or B terminal.
or
5
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