1A11-2
Fan Coil Heating-Cooling Thermostat
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
DESCRIPTION
PRECAUTIONS
INSTALLATION
SPECIFICATIONS
The 1A11-2 thermostat controls line voltage valves and/or blower
motors on fan coil units in manual changeover, heating/cooling
systems. It features a system switch for manual selection of heat-
off-cool, a three speed manual fan control switch, an adjustable
temperature dial with a 36 to 90°F range, and an indicating
thermometer, all combined in one deluxe-styled control.
Color-coded leads are provided for connection to field wiring. The
thermostat can be wired to perform the following functions:
- Thermostat cycles both fan and valve
- Thermostat cycles fan only
- Thermostat cycles valve only
- System switch “OFF” breaks all circuits
If in doubt about whether your wiring is millivolt, line, or low voltage,
have it inspected by a qualified heating and air conditioning contractor,
electrician, or someone familiar with basic electricity and wiring.
Do not exceed the specification ratings.
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.
WHITE-RODGERS
60
70
50
40
80
90
50
60
70
80
90
HIGH
MED
LOW
FAN
HEAT
OFF
COOL
SYSTEM
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.
CAUTION
!
Do not use on circuits exceeding specified volt-age. Higher
voltage will damage control – could cause shock or fire hazard.
emerson.com/white-rodgers
PART NO. 37-4113001
2107
Switch Action: SPDT
(Heating - open on rise)
(Cooling - close on rise)
Temperature Range: 36°F to 90°F (2°C to 32°C)
System Switch: Heat - Off - Cool
Fan Switch : Low - Medium - High
CAUTION
!
When the thermostat is set below 40°F (5°C), damage to the
building and/or contents may result due to freezing. This is
possible due to factory calibration tolerances, thermostat
location and operating characteristics of the heating equipment.
VOLTAGE (AC) 120V 240V 277V
Full Load Amps. 5.5 2.75 2.3
Locked Rotor Amps. 33.0 16.5 13.8
Pilot Duty 125VA
Mounting: Standard 2 x 4 inch outlet box or 2-ganged outlet
boxes. Mounting screws are provided with the thermostat. With
a standard adapter plate (not provided), this thermostat may be
mounted on a 4 inch square junction box.
SELECT THERMOSTAT LOCATION
Proper location insures that the thermostat will provide a
comfortable home temperature. Observe the following general
rules when selecting a location:
1. Locate thermostat about 5 ft. above the floor.
2. Install thermostat on a partitioning wall, not on an outside wall.
3. Never expose thermostat to direct light from lamps, sun, fireplaces
or any temperature radiating equipment.
4. Avoid locations close to windows, adjoining outside walls, or
doors that lead outside.
Operator: Save these instructions for future use!
Contact Structure: Snap action
Electrical Rating:
INSTALLATION
FAN
SYSTEM
LOW
HEAT
50
60
WHITE-RODGERS
70
80
90
40
40
50
60
70
80
90
4 x 4
JUNCTION
BOX
ADAPTER PLATE
(NOT PROVIDED)
USE 2 x 4 OR 4 x
4
JUNCTION BOX
1A11-2
MOUNTING
SCREWS (2)
WIRING
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.
Varying the wiring can alter the thermostat/system operation as
shown below:
- For the thermostat to cycle both fan and valve, connect all
wires as shown.
- For the thermostat to cycle fan only (if valve is not used),
do not connect the thermostat orange wire to the system. Wrap
orange lead with approved electrical tape or wire nut to prevent
shorting.
- For the thermostat to cycle the valve only (with fan on
continuously), Connect orange wire to L1 and black wire to
VALVE. Connect all other wires as shown.
NOTE: With the system switch in the OFF position, the thermostat
will prevent both the fan and valve circuits from turning on.
NOTE
This typical wiring diagram shows only the terminal identification
and wiring hookup. Always refer to wiring instructions, provided by
equipment manufacturer, for system hookup operation.
All wiring should be done according to local and national electrical
codes and ordinances.
5. Avoid locations close to air registers or in the direct path of air
from them.
6. Make sure there are no pipes or duct work in that part of the wall
chosen for the thermostat location.
7. Never locate thermostat in a room that is warmer or cooler than
the rest of the home, such as the kitchen.
8. Avoid locations with poor air circulation, such as behind doors or
in alcoves.
9. The living or dining room is normally a good location, provided there
is no cooking range or refrigerator on opposite side of wall.
INSTALL THERMOSTAT
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.
The thermostat may be mounted on a standard 2 x 4 inch vertical
outlet box or 2-ganged outlet boxes. When mounting to a 4 x 4
inch junction box is required, use of a standard adapter plate (not
provided) is necessary. USE COPPER CONDUCTORS ONLY.
Install the thermostat as follows:
1. Before mounting, connect system wiring to proper color-coded
leads at rear of thermostat. Follow equipment manufacturer’s
instructions or refer to wiring diagram for typical system hookups.
2. Remove thermostat cover by grasping top and bottom of cover
and pull straight out. Dress wiring into junction box and secure
thermostat to outlet box with mounting screws.
NOTE
DO NOT PUSH OR DAMAGE THE TEMPERATURE KNOB
DURING INSTALLATION.
3. Install thermostat cover, turn knob to desired set-ting, and set
selector switches for the appropriate system function and fan
speed.
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Emerson and White-Rodgers are
trademarks of Emerson Electric Co.
©2021 Emerson Electric Co.
All rights reserved.
TECHNICAL SUPPORT: 1-888-725-9797
TAN
BLUE
COOL
COOL
HEAT
HEAT
VALVE
(SOL)
L1*
(HOT)
GNDHIGH
HIGH
FAN
SWITCH
SYSTEM
SWITCH
MED
FAN
MED
OFF
LOW
LOW
RED
BLUE
RED
ORANGE
BLACK
GREEN
1A11-2
5-wire with ground, for single valve,
manual heat/cool changeover
CUSTOMER
CONNECTIONS
Note: Above FAN and SYSTEM switches shown in
MED and HEAT positions respectively.
THERMOSTAT
SCHEMATIC
*L1 is Power In
