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The SC2811 is a three-stage heat, two-stage cool thermostat. It functions with air conditioning, heat pumps, 

gas, oil or electric heat. 

The thermostat activates the first stage heat when the room temperature is below the heat set 

temperature (by the differential temperature). Second stage heat will be activated if the room temperature 

continues to drop. Third stage heat is activated (on some systems) if the room temperature drops further. 

The heat outputs are staged off (configurable, setting 10, Page 24) as the room temperature increases. For 

heat pump systems, the thermostat will not let the compressor come on for five minutes after it turns off. 

This protects your compressor. 

When the room temperature is greater than the cool set temperature (by the differential temperature), 

the cooling device is activated. Second stage cool will be activated if the room temperature continues to 

rise. The cool outputs are staged off (configurable, setting 10, Page 24) as the room temperature drops. 

The thermostat will not let the compressor come on for five minutes after it turns off. This protects your 

compressor.

The SC2811 has the following operating modes: 

OFF

Heat, Emergency Heat, Cool

 and 

Auto

. In 

OFF

 mode, 

the thermostat will not turn on heating or cooling devices. In the 

Heat

 mode, the thermostat controls the 

heating system. For heat pump systems, 

Emergency Heat

 mode is used to bypass the compressor (only 

backup heat operates). In the 

Cool

 mode, the thermostat controls the cooling system. In the 

Auto

 mode, the 

thermostat operates as an auto changeover thermostat. It will turn on heating or cooling as required. The 

indoor fan can be turned on in all operating modes using the 

Fan

 switch.

The SC2811 has an air filter check option also. When the fan run time exceeds the time set in the 

configuration (step 15, page 25), the   filter reminder will be displayed. To reset the   filter counter to zero 

and clear the   filter reminder from the display, press the   and   buttons in simultaneously for 5 seconds.

Mode of Operation

Содержание SC 2811

Страница 1: ...can made products plus wiring diagrams troubleshooting tips and more visit us at www icmcontrols com Configurable Three Stage Heat 2 Stage Cool Systems Multi Stage Heat Pump Systems Backlit Display Fi...

Страница 2: ...ed 2 To Remove Existing Thermostat 3 To Install Thermostat 3 Remote Sensor Installation Optional 5 Terminal Designator Descriptions 6 SC2811 Output Chart 6 Wiring Diagrams 7 Wiring Diagram Conversions...

Страница 3: ...Parts Diagram R12 W1 O B Y1 W2 Y2 W3 S1 S2...

Страница 4: ...rmostat 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...

Страница 5: ...wire terminals 5 Remove existing thermostat base from wall 6 Refer to the following section for instructions on how to install this thermostat ELECTRICAL SHOCK HAZARD Turn off power at the main servic...

Страница 6: ...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 and Wiring Diagram Convers...

Страница 7: ...rdware provided 4 Install two wires between remote sensor and thermostat use shielded cable Wire 1 should run between the S1 terminal on the thermostat and the S1 terminal on the remote sensor Wire 2...

Страница 8: ...for non hp systems Terminal Designator Descriptions 1ST Cool 2ND Cool 1ST Heat 2ND Heat 3RD Heat Heat Cool Y1 G YI Y2 G W1 G W1 W2 G W1 W2 W3 G Heat Pump One Compressor Y1 G O Y1 G O Y1 G B Y1 W2 G B...

Страница 9: ...First Cooling Control Second Cooling Control Wiring Diagrams Third Heating Control Second Cooling Control Second Heating Control First Cooling Control First Heating Control...

Страница 10: ...Third Heating Control Second Heating Control First Heating Control Third Heating Control Second Heating Control First Heating Control...

Страница 11: ...Single Compressor 3rd Stage Heat 2nd Stage Heat Reversing Valve Compressor Two Compressors Auxilliary Heat Reversing Valve Compressor 1 Compressor 2...

Страница 12: ...24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Emergency heating circuit System monitor LED capped capped Note 1 E terminal on PCB cap...

Страница 13: ...VAC return 24 VAC common Reversing valve heating mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Emergency heating circuit System monitor LED capped capped Note 1 E terminal...

Страница 14: ...at 24 VAC return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Outdoor thermostat Defrost sensor capped capped Note 1 W2 terminal on P...

Страница 15: ...Systems SC 281 1 Electronic Thermostat 24 VAC return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit sequencer 1 Fan contactor circuit 3rd stage heating circu...

Страница 16: ...VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Emergency heating circuit System monitor LED capped capped Note 1 E terminal on PCB capped...

Страница 17: ...VAC return 24 VAC common Reversing valve heating mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Emergency heating circuit System monitor LED capped capped Note 1 E terminal...

Страница 18: ...Thermostat 24 VAC return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit capped capped Note 1 X2 terminal on PCB capped Note 2 T termin...

Страница 19: ...281 1 Electronic Thermostat 24 VAC return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit System monitor LED capped Note 1 X terminal o...

Страница 20: ...C return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit Fan contactor circuit Emergency heating circuit System monitor LED capped capped Note 1 E terminal on...

Страница 21: ...tronic Thermostat 24 VAC return 24 VAC common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit sequencer 1 Fan contactor circuit Emergency heating circuit capped Note 1 E te...

Страница 22: ...common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit 2nd stage cooling circuit Fan contactor circuit Note 1 E terminal on PCB capped Note 2 L terminal on PCB capped R C...

Страница 23: ...C common Reversing valve cooling mode Compressor contactor 2nd stage heating circuit 2nd stage cooling circuit Fan contactor circuit Note 1 E terminal on PCB capped Note 2 L terminal on PCB capped R C...

Страница 24: ...ote The SW5 button will return you to the previous screen 5 To exit configuration mode slide the Mode switch to Heat or Cool Configuration Mode Settings The setup screens for Configuration Mode are as...

Страница 25: ...age Temperature Differential 1 F to 3 F 0 5 C to 1 5 C Set the number of degrees between your setpoint temperature and your turn on temperature Press the or button to set differential value Press the...

Страница 26: ...utton to select Press the SW6 button to advance to the next screen FILTER DIFF ROOM SET REMOTE FILTER DIFF ROOM SET REMOTE 8 3rd Stage Temperature Differential 1 F to 6 F 0 5 C to 3 0 C Set the number...

Страница 27: ...tch actual room temperature Note When not set to 0 ROOM will display Press the or button to select Press the SW6 button to advance to the next screen FILTER DIFF ROOM SET REMOTE 15 Filter Check time 3...

Страница 28: ...arily bypass the five minute delay slide the Mode switch to OFF for 2 seconds and then back to Cool Heat Test 1 Slide Mode switch to Heat mode 2 Adjust the set temperature so it is 5 degrees above the...

Страница 29: ...puts are staged off configurable setting 10 Page 24 as the room temperature drops The thermostat will not let the compressor come on for five minutes after it turns off This protects your compressor T...

Страница 30: ...ff This protects the compressor 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 ENTER...

Страница 31: ...ROOM displays Room temperature offset is not zero see Configuration Mode Setting 13 Page 25 Status indicator Green light Cooling operation Red light Heating operating Status indicator option ON see C...

Страница 32: ...r 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 Se...

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