ICM Controls SC 4811 General instructions

Parts Diagram
Conguration switch
Reset switch
Left (system)
button
Right (fan)
button
Down button
Up button
Field programming pins
Y2W2Y1W
O/B
CRS2S1 G
RESET CONFIG
FP
2 Heat/2 Cool
Auto Changeover
Hardwire
SC4811
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
• Congurable
• 2-StageHeat/2-StageCoolSystems
• 2-StageHeatPumpSystems
• LargeDisplayWithBacklight
• SelectableFahrenheitorCelsius
• CompatiblewithGas,Oil,orElectric
• SimpleSet™FieldProgramming
• StatusIndicatorLight
• RelayOutputs
(minimumvoltagedropinthermostat)
• RemoteSensorCompatible
• IdeallySuitedfor:
– Residential (New Construction/Replacement)
– Light Commercial
Icon Descriptions
Fan operation icon
Cooling operation icon
Heating operation icon
Lock mode activated
Room temperature
offset activated
Specifications
Electricalrating: • 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperaturecontrolrange:45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C)
Systemcongurations: 2-stage heat, 2-stage cool, heat pump, gas, oil, electric
Timing: Anti-short Cycle: 4 minutes (bypass anti-short cycle delay by returning to OFF mode for 5 seconds)
Backlight Operation: 10 seconds
Terminations: S1, S2, R, C, W/O/B, Y1, W2, Y2, G
Package Contents/Tools Required
Packageincludes: SC4811 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
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
To Remove Existing Thermostat
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 Install Thermostat
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 ve feet above the oor. 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, pull gently at the seam at the top.
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 slit in thermal intrusion barrier and
into wire opening.
9. Use supplied screws to mount thermostat base to wall.
10. Insert stripped, labeled wires in matching wire terminals.
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. Turn on power to the system at the main service panel.
13. Congure thermostat to match the type of system you have.
14. Replace cover on thermostat by snapping it in place.
15. Test thermostat operation as described in “Testing the Thermostat”.
Wiring Diagrams
Heat/CoolSystems
120
VAC 24 VAC
Heat #1
Cool #1
Heat #2
Cool #2
Fan
Transformer
Optional
remote or
outdoor sensor
* outdoor sensor only reads outdoor temperature
SingleCompressor
heatpumpwithelectricbackup
DualCompressor
heatpumpwithelectricbackup
120
VAC 24 VAC
Reversing Valve
Compressor
Auxiliary Heat #1
Fan
Transformer
Optional
remote or
outdoor sensor
* outdoor sensor only reads outdoor temperature
120
VAC 24 VAC
Reversing Valve
Compressor #1
Auxiliary Heat
Compressor #2
Fan
Transformer
Optional
remote or
outdoor sensor
Remote Sensor Installation (Optional)
1. Remove cover from remote sensor housing.
2. Select an appropriate location for mounting the remote sensor.
3. Mount remote sensor unit using hardware provided.
4. Install two strand shielded wire between remote sensor and thermostat. Shielded wire must be used. Donot run
remote sensor wire in conduit with other wires.
• Wire1 should run between the S1 terminal on the thermostat and the S1 terminal on the remote sensor
• Wire2 should run between the S2 terminal on the thermostat and the S2 terminal on the remote sensor
• Connect the shielding of the wire to the S2 terminal on the thermostat
5. Congure the thermostat to operate with the remote indoor sensor (see Conguration Mode setting) or use it for
an outdoor sensor.
Note: Remote or outdoor sensor reading can be displayed by
simultaneously pressing the Down and SYS buttons.
Remote Sensor: (Shown: Optional ICM ACC-RT103 Remote Indoor Sensor;
for outdoor sensor, order ACC-OD103.)
Terminal Designator Descriptions
SC4811 Output Chart
R – 24 VAC hot
C – 24 VAC common
W1/O/B – Congurable
W1 – 1st stage heat for non-heat pump systems
O – cool active reversing valve
B – heat active reversing valve
Y1 – 1st stage cool, 1st stage heat for heat pumps
W2 – 2nd stage heat for non-heat pump systems
Y2 – 2nd stage cool for 2 compressor systems, 2nd stage heat for 2 compressor heat pump systems
G – Fan
The SC4811 thermostat is congurable for all systems. The conguration directly affects the outputs.
Use the output chart to correctly congure and wire the thermostat to your system.
1ST Cool 2ND Cool 1ST Heat 2ND Heat
Heat/Cool Y1, G YI, Y2, G W1, G* W1, W2, G*
Heat Pump (One Compressor) Y1, G, O Y1, G, O Y1, G, B Y1, W2, G, B
Heat Pump (Two Compressors) Y1, G, O Y1, Y2, G, O Y1, G, B Y1, Y2, G, B
Emergency Heat (Heat Pump Only) N/A N/A W2, G W2, G
* G not energized when congured as a gas/oil system
OFF
1. Verify the SC4811 is in the OFF mode.
Press the SYS (left) button until off mode displays.
2. Remove the cover of the thermostat by gently pulling near one of the corners at
the top of the thermostat.
Press the up or down button to change settings within each screen.
Configuration Mode
3. Press the CONFIG button for 1 second while the SC4811 is in OFFmode.
To exit conguration mode, press the CONFIG switch for 1 second.
Press the right button to advance to the next screen.
Note: Pressing the left button will return you to the previous screen.
Down
button
Up
button
Left
button
Right
button
The conguration mode is used to set the SC4811 to match your heating/cooling system. The SC4811 functions with
heat pump, air conditioning, gas, oil or electric heat systems.
To congure the SC4811, perform the following steps:
CONFIG
Configuration Mode Settings
4. StagedOffOutputs
Select whether the outputs for heating and cooling are staged off independently or are
satised 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.
3. 2nd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.
2. 1st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.
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.
The setup screens for Conguration Mode are as follows:
5. MinimumDeadband (1°F to 9°F) (1°C to 5°C)
Set the minimum separation between heat setpoint and cool setpoint in Auto
Changeover Mode.
Press the up or down button to set deadband value.
Press the rightbutton to advance to the next screen.
6. System – Set for heat pump, non-heat pump, reversing valve operation and number of compressors in your
system.
Press the up or down button to select.
Press the right button to advance to the next screen.
Choose System
ReversingValve
Active
NumberofCompressors
orCompressorStages
Typeof
Heat
HeatPump
HP O 1
HP b 1
HP O 2
HP b 2
Non-Heat
Pump
Heat Gas
Heat Electric
7. 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.

8. Lockout(0-8°, COOL-HEAT)
Select the number of degrees set temperature can be changed during keypad lockout.
COOL-HEAT lockout allows adjustment of the set temperatures to the maximum heat set
temperature selected in Step 9 and minimum cool set temperature selected in Step 10.
Note: The mode cannot be changed when the thermostat is locked.
Press the up or down button to select.
Press the right button to advance to the next screen.
9. 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.
10. MinimumCoolSetpoint (45°F to 90°F) (7°C to 32°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.
15. StatusIndicatorLight (Led 0, 1, 2)
0 = Status indicator never on
1 = Status indicator on with rst stage
2 = Status indicator on with second stage
Press the up or down button to select.
Press the CONFIG button for 2 seconds to exit conguration.
Mode of Operation
The SC4811 is an auto changeover, 2-stage heat, 2-stage cool thermostat. It functions with air conditioning, heat
pumps, gas, oil or electric heat systems. An outdoor sensor can be used to monitor the outdoor temperature.
The thermostat activates the heating appliance when the room temperature is below the set heat temperature
(by the differential temperature) and the red indicator light (congurable) on the thermostat will light. The SC4811
will stop outputting and the red light will turn off when the call for heat has been satised. With heat pumps, the
thermostat will not let the compressor come on for 4 minutes after it turns off. This protects your compressor.
When the room temperature is greater than the set cool temperature (by the differential temperature), the cooling
device is activated and the green indicator light (congurable) on the thermostat will turn on. The SC4811 will
stop outputting and the green light will turn off when the call for cooling is satised. The thermostat will not let the
compressor come on for 4 minutes after it turns off. This protects your compressor.
The SC4811 has four possible operating modes: OFF, Heat, Cool, and Heat&Cool mode. In off mode, the
thermostat will not turn on heating or cooling devices. The manual fan can be turned on in all operating modes using
the fan button. In heat mode, the thermostat controls the heating system. In the cool mode, the thermostat controls
the cooling system. In heat & cool mode, the thermostat controls both the heating and cooling systems.
The SC4811 also has a button lockout feature. This enables the thermostat to be set to the proper mode and
temperature and locked so it cannot be tampered with.
13. TemperatureSensor (1-3)
1. Only on-board sensor determines room temperature.
2. Only remote sensor determines room temperature.
3. Average temperature of on-board and remote sensor.
Note: If there is no remote sensor, option 1 must be selected.
Press the up or down button to select.
Press the right button to advance to the next screen.
12. MaximumCyclesAllowedPerHour (- -, 2-6)
- - = as many as needed, 2-6 = maximum cycles/hour
Press the up or down button to select.
Press the right button to advance to the next screen.
11. 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, will display.
Press the up or down button to select.
Press the right button to advance to the next screen.
14. 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.
FIVE-YEAR LIMITED WARRANTY
The Seller warrants its products against defects in material or workmanship for a period of ve (5) years from the
date of manufacture. The liability of the Seller is limited, at its option, to repair, replace or issue a non-case credit for
the purchase prices of the goods which are provided to be defective. The warranty and remedies set forth herein
do not apply to any goods or parts thereof which have been subjected to misuse including any use or application
in violation of the Seller’s instructions, neglect, tampering, improper storage, incorrect installation or servicing not
performed by the Seller. In order to permit the Seller to properly administer the warranty, the Buyer shall: 1) Notify
the Seller promptly of any claim, submitting date code information or any other pertinent data as requested by the
Seller. 2) Permit the Seller to inspect and test the product claimed to be defective. Items claimed to be defective
and are determined by Seller to be non-defective are subject to a $30.00 per hour inspection fee. This warranty
constitutes the Seller’s sole liability hereunder and is in lieu of any other warranty expressed, implied or statutory.
Unless otherwise stated in writing, Seller makes no warranty that the goods depicted or described herein are t for
any particular purpose.
LIAF034
Patent No. - Design: 424,953
Patent No. - Thermal Intrusion Barrier: 6,597,275
Patent Pending - SimpleSet
TM
Target Programming Technology
7313 William Barry Blvd., North Syracuse, NY 13212
(Toll Free) 800-365-5525 (Phone) 315-233-5266 (Fax) 315-233-5276
www.icmcontrols.com
Button Functions
UP – Used to increase the set temperatures and to adjust conguration settings.
DOWN – Used to decrease the set temperatures and to adjust conguration settings.
SYS(left) – Used to change from OFF, HEAT, COOL and AUTO changeover modes
FAN(right) – Used to turn on and off the indoor fan.
UP,SYSandFAN – Held in simultaneously for 10 seconds to lock and unlock the thermostat.
DOWNandSYS – Pressed simultaneously to display outdoor temperature if outdoor remote sensor
is connected.
SYStem (left) FAN (right)
Down button
Up button
Operating Modes
There are four possible operating modes for the SC4811. Off, Cool, Heat, and Cool & Heat modes are accessed by
pressing the SYS (left) button.
OFF Mode
• In this mode, the thermostat will not turn on the heating or cooling devices
Note: The indoor fan can be turned on manually in every operating mode by
pressing the FAN (right) button. The word FAN shows on the display and
the fan icon appears when the fan operates.
OFF
Heat Mode
• In this mode, the thermostat controls the heating system. When the heat outputs,
the ame icon apprears on the display.
Note: For heat pumps, there is a four minute delay for your compressor to
restart after it has turned off. To bypass the compressor time delay, go to
OFF mode for 5 seconds.
Emergency Heat Mode (Heat pump systems only)
• In emergency heat mode, the heat pump system will be disabled and auxiliary
heat will become the primary source of heat.
Testing the Thermostat
Once the thermostat is congured, it should be thoroughly tested.
CAUTION! : Do not energize the air conditioning system when the outdoor temperature is below 50
degrees. It can result in equipment damage or personal injury.
Heat Test
1. Press SYS (left) button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on within a few seconds. Red LED may turn on.
4. Adjust the set temperature 2 degrees below the room temperature and the heat
should turn off. There may be a fan delay on your system.
Note: For heat pumps, there is a four-minute delay to protect your compressor after it turns off. To bypass the
compressor time delay, go to OFF mode for 5 seconds.
Cool Mode
• In this mode, the thermostat controls the cooling system. When the cooling
outputs, the snowake icon apprears on the display.
Note: There is a four minute delay for your compressor to restart after it has
turned off. To bypass the compressor time delay, go to OFF mode for 5
seconds.
Cool and Heat Mode (Auto Changeover)
• In this mode, the thermostat controls the cooling and heating systems, automatically
changing over from one to the other as needed.
• The timing display alternates with the set temperature every 10 seconds in the cool
and heat mode.
SimpleSetTM Field Programming
Requires SimpleSetTM Transfer Cable (ACC-WIH21)
This feature is used for transferring the conguration from the master to the target thermostat. All thermostats for a
job can be mounted and powered up. Congure one thermostat. This will be the master. The master will be used to
copy the conguration to the rest of the thermostats.
PreparingthemastertoSend:
1. The master must be powered with 24 VAC.
2. Verify the master thermostat is in OFF mode.
3. Press SYS (left) button until OFF mode displays.
4. Remove cover of the master thermostat by gently pulling near one of the corners at the top
of the thermostat.
5. Press the up and down buttons and CONFIG switch simultaneously for 5 seconds.
6. The OUT screen displays indicating the master thermostat is ready to
transfer data.
Note: Press the up and down buttons and CONFIG switch simultaneously for 5 seconds
to exit from data transfer mode and to return the master to the OFF mode.
7. Turn off power to the master and remove it from the wall.
8. Connect the master to the target using the 3 wire connector. Attach one end to
the Master’s FP pins and the other end to the Target’s FP pins.
Note: Target thermostat must be powered with 24 VAC for eld
programming to occur.
When the connection has been made correctly, the master thermostat will power up and
the target will count from 5 down to 1. It will then display the LOCK conrming the data has been saved in memory.
When all target thermostats have been completed, reinstall the master thermostat.
Press the up and down buttons and the CONFIG switch simultaneously for 5 seconds to exit from the data transfer
mode and to return the master thermostat to the OFF mode.
OFF
FP pins
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24 VAC is not
present
System fan does not come on properly Verify wiring is correct, check Gas/Electric Conguration
(see Conguration Mode Setting 6)
All thermostat buttons are inoperative Verify 24 VAC is present; unit locks out when 24 VAC is not present
No response with rst button press First button press activates backlight only
Thermostat turns on and off too
frequently
Adjust temperature differential
(see Conguration Mode Settings 2 & 3)
Fan runs continuously Press FAN (right) button to turn fan off
Status indicator light not on during call Turn status indicator function on
(see Conguration Mode Setting 17)
Room temperature is not correct Calibrate thermostat (see Conguration Mode Setting 11)
If remote sensor is used, check S1 and S2 terminal connections
displays when any button is
pressed
Thermostat has the button lockout function activated (see Lockout
Feature and Conguration Mode Setting 8)
on display instead of room
temperature
Check for a bad connection at S1 and S2 terminals, if used
(see Conguration Mode Setting 13)
Heat or Cool not coming on Verify wiring is correct, gently pull on each wire to verify there is a good
connection at terminal block
Problem not listed above Press Reset button once*
*ResetButtonFunction: Display is refreshed, conguration settings are unchanged.
Fan Test
1. Press FAN (right) button. Fan displays. Indoor fan turns ON.
2. Press FAN (right) button. Indoor fan turns OFF.
OFF
Cool Test
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. A/C should come on within a few seconds. Green LED may turn ON.
4. Adjust the set temperature 2 degrees above the room temperature and the A/C
should turn off. There may be a fan delay on your system.
Note:
There is a four-minute time delay to protect the compressor after it . To bypass the compressor time
delay, go to OFF mode for 5 seconds.
Lockout Feature
The SC4811 has a button lockout feature so the mode cannot be changed and the
temperature adjustment is limited. Select the appropriate lockout from Conguration
Mode Settings (Step 8) of this guide.
To activate the LOCK feature:
1. Simultaneously press the SYS, FAN and UP buttons for 10 seconds.
2. will display and the lockout function will be enabled.
To deactivate the LOCK feature, repeat steps 1 and 2 above.