Specifications
Electrical rating:
• 24 VAC (18-30 VAC)
• 4 amp maximum total load
• 1 amp maximum per terminal
Temperature control range:
45°F to 90°F (7°C to 32°C)
Accuracy:
± 1°F (± 0.5°C)
System configurations:
2-stage heat, 1-stage cool, heat pump, gas, oil, electric
Timing:
Anti-short Cycle: 4 minutes
Backlight Operation: 5 seconds after mode change or button press
Terminations:
R, C, W1/O/B, Y, W2, E, G
Important Safety Information
WARNING!
:
Always turn off power at the main power supply before installing, cleaning,
or removing thermostat.
• This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC
• Do not short across terminals of gas valve or system control to test operation; this will damage your
thermostat and void your warranty
• All wiring must conform to local and national electrical and building codes
• Do not use air conditioning when the outdoor temperature is below 50 degrees; this can damage
your A/C system and cause personal injuries
• Use this thermostat only as described in this manual
ELECTRICAL SHOCK HAZARD
– Turn off power at the main service panel by removing
the fuse or switching the appropriate circuit breaker to the OFF position before
removing the existing thermostat.
1. Turn off power to the heating and cooling system by removing the fuse or switching the
appropriate circuit breaker off.
2. Remove cover of old thermostat. This should expose the wires.
3. Label the existing wires with the enclosed wire labels before removing wires.
4. After labeling wires, remove wires from wire terminals.
5. Remove existing thermostat base from wall.
6. Refer to the following section for instructions on how to install this thermostat.
To Remove Existing Thermostat
Package Contents/Tools Required
Package includes:
SC2311L
thermostat on base, thermostat cover, wiring labels, screws and wall
anchors, Installation, Operation and Application Guide
Tools required for installation:
Drill with 3/16” bit, hammer, screwdriver
2 Heat/1 Cool
Manual Changeover
Hardwired
SC2311L
Non-Programmable Electronic Thermostat
Installation, Operation & Application Guide
For more information on our complete range of American-made
products – plus wiring diagrams, troubleshooting tips and more,
visit us at
www.icmcontrols.com
• Configurable
• 2-Stage Heat/1-Stage Cool Systems
• Heat Pump Systems
• Backlit Display
• Field Temperature Calibration
• Status Indicator Light
• Relay Outputs
(minimum voltage drop in thermostat)
• Ideally Suited for:
–
Residential (New Construction/Replacement)
–
Light Commercial
Parts Diagram
Down
button
Up
button
Left switch
Reset switch
RESET
LEFT
RIGHT
FP
R
C
W
O/
B
Y
W2
E
G
Field
programming
pins
Right switch
Mode switch
Fan switch
Status Led
ELECTRICAL SHOCK HAZARD
– Turn off power at the main service panel by removing
the fuse or switching the appropriate circuit breaker to the OFF position before
removing the existing thermostat.
IMPORTANT:
Thermostat installation must conform to local and national building and
electrical codes and ordinances.
Note:
Mount the thermostat about four feet above the floor. Do not mount the thermostat
on an outside wall, in direct sunlight, behind a door, or in an area affected by a vent
or duct.
1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate
circuit breaker off.
2. To remove cover, insert and twist a coin or screwdriver in the slots on top of the thermostat.
3. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through
the wire opening in the base of the thermostat).
4. Mark the placement of the mounting holes.
5. Set thermostat base and cover away from working area.
6. Using a 3/16” drill bit, drill holes in the places you have marked for mounting.
7. Use a hammer to tap supplied anchors in mounting holes.
8. Align thermostat base with mounting holes and feed the control wires through wire opening.
9. Use supplied screws to mount thermostat base to wall.
10. Insert stripped, labeled wires in matching wire terminals. See “Wiring Diagrams” section of this
manual.
CAUTION!
:
Be sure exposed portion of wires does not touch other wires.
11. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the
proper terminal.
12. Replace cover on thermostat by snapping it in place.
13. Turn on power to the system at the main service panel.
14. Test thermostat operation as described in “Testing the Thermostat”.
To Install Thermostat
Terminal Designator Descriptions
R – 24 VAC hot
C – 24 VAC common
W1/O/B – Configurable
W1 – 1st stage heat for non-hp systems
O – cool active reversing valve
B – heat active reversing valve
Y – 1st stage cool, 1st stage heat for heat pumps
W2 – 2nd stage heat for heat pump, non-heat pump, and emergency heat
E – 1st stage heat for Emergency Heat operation
G – Fan
SC2311L Output Chart
1
ST
Cool
1
ST
Heat
2
ND
Heat
Heat/Cool
Y, G
W1, G*
W1, W2, G*
Heat Pump (One Compressor)
Y, G, O
Y, G, B
Y, W2, G, B
Emergency Heat HP
N/A
E, G
E, W2, G
* G not energized when configured as a gas/oil system
The
SC2311L
thermostat is configurable for different systems. The configuration directly effects the
outputs.
Use the output chart to correctly configure and wire the thermostat to your system.
Second
Heating Control
First
Heating Control
Fan
Control
Electric Heat
Single Transformer
Second
Heating Control
First
Heating Control
Gas/Oil Heat
Single Transformer
Wiring Diagrams
Cooling Control
Fan
Control
Second
Heating Control
First
Heating Control
Fan
Control
Cooling Control
Single Transformer
Single Transformer
Single Compressor
2
nd
Stage
Heat
Reversing
Valve
Compressor
Emergency
Heat
Fan
Control
1.
Temperature Scale (F or C)
– Choose Fahrenheit or Celsius.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
2.
1
st
Stage Temperature Differential
(1°F to 5°F) (0.5°C to 2.5°C)
Set the number of degrees between your “setpoint” temperature and your “turn
on” temperature.
Press the
up
or
down
button to set differential value.
Press the
RIGHT
button to advance to the next screen.
Configuration Mode Settings
The configuration mode is used to set the
SC2311L
to match your heating/cooling system. The
SC2311L
functions with heat pump, air conditioning, gas, oil or electric heat systems.
To configure the
SC2311L
, perform the following steps:
1. Remove the cover of the thermostat by gently pulling on one of the top corners.
2. Simultaneously hold the
LEFT
and
RIGHT
buttons in for 5 seconds while the
SC2311L
is in OFF
mode.
3. Press the
up
or
down
button to change settings within each screen.
4. Press the
RIGHT
button to advance to the next screen.
Note:
The
LEFT
button will return you to the previous screen.
5. To exit configuration mode, slide the Mode switch to Heat or Cool.
3.
2
nd
Stage Temperature Differential
(1°F to 5°F) (0.5°C to 2.5°C)
Set the number of degrees between when stage 1 turns on and when stage 2
turns on.
Press the
up
or
down
button to set differential value.
Press the
RIGHT
button to advance to the next screen.
5.
Heat Source
(o, b, g, E)
Change between “o” Heat pump cool active, “b” Heat pump heat active, “g”
(Gas) and “E” (Electric).
Press the
up
or
down
button to set heat source.
Press the
RIGHT
button to advance to the next screen.
4.
Staged Off Outputs
Select whether the outputs for heating and cooling are staged off
independently or are satisfied simultaneously.
1 = outputs staged off independently
0 = outputs off simultaneously
Press the
up
or
down
button to set.
Press the
RIGHT
button to advance to the next screen.
6.
Auxiliary Delay ON
– (0-30 minutes) – Set the delay time in minutes for auxiliary
heat to be locked out after a call for second stage. This extra savings feature is
used to temporarily lock out auxiliary heat devices, allowing just heat pump to try
to satisfy heat call.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen
7.
Lockout
(0°F-8°F) (0°C-4°C)
–
Select the number of degrees set temperature
can be changed during keypad lockout
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
8.
Maximum Heat Setpoint
(45°F to 90°F) (7°C to 32°C)
Adjust to control the maximum Heat set temperature allowed.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
9.
Minimum Cool Setpoint
(45°F to 90°F) (7°C to 32.0°C)
Adjust to control the minimum Cool set temperature allowed.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
10.
Room temperature offset
(+9°F to -9°F) (+4.5°C to -4.5°C)
Adjust to calibrate displayed room temperature to match actual room
temperature.
Note:
When not set to 0, ROOM
will display.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
11.
Maximum compressor cycles allowed per hour
(-, 2-6)
- = as many as needed, and 2-6 = maximum cycles/hour
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
12.
Cooling Fan Delay Off Time
(0, 30, 60, 90 seconds)
Select the fan purge time for cooling.
Press the
up
or
down
button to select.
Press the
RIGHT
button to advance to the next screen.
13.
Status Indicator Light
(Lt 0, 1, 2)
0 = Status indicator never on
1 = Status indicator on with first stage
2 = Status indicator on with second stage
Press the
up
or
down
button to select.
Note:
Red light indicates heating cycle and green light indicates cooling cycle.
Slide the Mode switch to Heat or Cool to exit configuration.
