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• Configurable
• 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
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
SC 481 1
Electronic Thermostat
2 Heat/2 Cool
Auto Changeover
Hardwire
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Table of Contents
Related Manuals for ICM Controls SC 4811
Summary of Contents for ICM Controls SC 4811
- Page 1 SC 481 1 2 Heat/2 Cool Auto Changeover Hardwire Electronic Thermostat • Configurable • 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 Installation, Operation & Application Guide For more information on our complete range of American-made products –...
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Page 2: Table Of Contents
Table of Contents Parts Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Icon Descriptions . -
Page 3: Parts Diagram
Parts Diagram Up button Down button S1 S2 R Y1 W2 Y2 Right (fan) button RESET CONFIG Left (system) button Field programming pins Configuration switch Reset switch... -
Page 4: Icon Descriptions
Icon Descriptions Room temperature offset activated Fan operation icon Lock mode activated Cooling operation icon Heating operation icon 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 configurations: 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... -
Page 5: Important Safety Information
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 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 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 . -
Page 6: To Install 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 five 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, 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 . -
Page 7: Wiring Diagrams
Wiring Diagrams Heat/Cool Systems Optional remote or outdoor sensor Transformer 24 VAC Heat #1 Cool #1 Heat #2 Cool #2 * outdoor sensor only reads outdoor temperature... -
Page 8: Single Compressor Heat Pump With Electric Backup
Single Compressor Dual Compressor heat pump with electric backup heat pump with electric backup Optional Optional remote or remote or outdoor sensor outdoor sensor Transformer Transformer 24 VAC 24 VAC Reversing Valve Reversing Valve Compressor Compressor #1 Auxiliary Heat #1 Auxiliary Heat Compressor #2 * outdoor sensor only reads outdoor temperature... -
Page 9: Remote Sensor Installation (Optional)
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 . Configure the thermostat to operate with the remote indoor sensor (see Configuration Mode setting 13, Page 13) or use it for an outdoor sensor . Remote Sensor: (Shown: Optional ICM ACC-RT103 Remote Indoor Sensor; for outdoor sensor, order ACC-OD103.) Note: Remote or outdoor sensor reading can be displayed by simultaneously pressing the Down and SYS buttons . -
Page 10: Terminal Designator Descriptions
Terminal Designator Descriptions R – 24 VAC hot C – 24 VAC common W 1/O/B – Configurable 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 SC481 1 Output Chart Cool Cool Heat 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... -
Page 11: Configuration Mode
Configuration Mode The configuration 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 configure the SC4811, perform the following steps: 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 . 3 . Press the CONFIG button for 1 second while the SC4811 is in OFF mode . CONFIG S1 S2 R Y1 W2 RESET CONFIG Press the up or down button to change settings within each screen . button Down button Press the right button to advance to the next screen . Note: Pressing the left button will return you to the previous screen . Left Right button button... -
Page 12: Configuration Mode Settings
Configuration Mode Settings The setup screens for Configuration Mode are as follows: 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 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 . 3 . 2 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 . 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 . - Page 13 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 . Reversing Number of Compressors Type of Choose System Valve Active or Compressor Stages Heat Heat Pump Heat Non-Heat Pump Heat Electric Press the up or down button to select . Press the right button to advance to the next screen .
- Page 14 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 .
- Page 15 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 . 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 . 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 . 14 . Cooling Fan Delay Off Time (0, 30, 60, 90 seconds) Select the fan purge time for cooling .
- Page 16 15 . Status Indicator Light (Led 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 . Press the CONFIG button for 2 seconds to exit configuration .
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Page 17: Mode Of Operation
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 (configurable) on the thermostat will light . The SC4811 will stop outputting and the red light will turn off when the call for heat has been satisfied . 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 (configurable) on the thermostat will turn on . The SC4811 will stop outputting and the green light will turn off when the call for cooling is satisfied . 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 clock display alternates with the set temperature display for heat & cool mode . 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 . -
Page 18: Button Functions
Button Functions Up button Down button SYStem (left) FAN (right) Used to increase the time, set temperatures and to adjust configuration settings . DOWN Used to decrease the time, set temperatures and to adjust configuration 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 . -
Page 19: Operating Modes
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 . Heat Mode • In this mode, the thermostat controls the heating system . When the heat outputs, the flame 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 . -
Page 20: Testing The Thermostat
Cool Mode • In this mode, the thermostat controls the cooling system . When the cooling outputs, the snowflake 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 . Testing the Thermostat Once the thermostat is configured, 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 . -
Page 21: Lockout Feature
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 turns off . To bypass the compressor time delay, go to OFF mode for 5 seconds . Fan Test 1 . Press FAN (right) button . Fan displays . Indoor fan turns ON . 2 . Press FAN (right) button . Indoor fan turns OFF . 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 Configuration Mode Settings (Step 8, Page 12) of this guide . -
Page 22: Simpleset Tm Field Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SimpleSet Field Programming Requires SimpleSet Transfer Cable (ACC-WIH21) This feature is used for transferring the configuration from the master to the target thermostat . All thermostats for a job can be mounted and powered up . Configure one thermostat . This will be the master . The master will be used to copy the configuration 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 . -
Page 23: Troubleshooting
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 Configuration (see Setting 6, Page 11) All thermostat buttons are inoperative Verify 24 VAC is present; unit locks out when 24 VAC is not present No response with first button press First button press activates backlight only Thermostat turns on and off too Adjust temperature differential (see Configuration Mode Settings 2 & 3, Page 10) frequently Fan runs continuously Press FAN (right) button to turn fan off Status indicator light not on during call Turn status indicator function on (see Configuration Mode Setting 17, Page 14) Room temperature is not correct Calibrate thermostat (see Configuration Mode Setting 11, Page 13) 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, Page 19 and Configuration Mode Setting 8, Page 12) on display instead of room Check for a bad connection at S1 and S2 terminals, if used (see Configuration temperature Mode Setting 13, Page 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 Time and day are reset, configuration settings are unchanged . - Page 24 ONE-YEAR LIMITED WARRANTY The Seller warrants its products against defects in material or workmanship for a period of one (1) year 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 fit for any particular purpose . Patent No. - Design: 424,953 Patent No. - Thermal Intrusion Barrier: 6,597,275 Patent Pending - SimpleSet Target Programming Technology William Barry Blvd., North Syracuse, NY (Toll Free) 800-365-5525...