Icm controls Sc 5812 User manual

3 Heat/2 Cool

Auto Changeover

Hardwire

SC 5812

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

• 7-Day, 5-2-Day or 5-1-1-Day Programmable

• Conﬁgurable

• 3-Stage Heat/2-Stage Cool Systems

• 3-Stage Heat Pump Systems

• Large Display With Backlight

• Selectable Fahrenheit or Celsius

• Compatible with Gas, Oil, or Electric

• Dual Fuel Compatible

• 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

Table of Contents

PartsDiagram ............................................................................1

IconDescriptions..........................................................................2

Speciﬁcations.............................................................................2

ImportantSafetyInformation ................................................................3

PackageContents/ToolsRequired.............................................................3

ToRemoveExistingThermostat..............................................................3

ToInstallThermostat.......................................................................4

WiringDiagrams...........................................................................5

Heat/CoolSystems.......................................................................5

SingleCompressorheatpumpwithelectricbackup..............................................6

DualCompressorheatpumpwithelectricbackup...............................................6

SingleCompressorheatpumpwithgas/oilbackup ..............................................7

DualCompressorheatpumpwithgas/oilbackup ...............................................7

RemoteSensorInstallation(Optional)..........................................................8

Terminal Designator Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

SC5812 Output Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

ConﬁgurationMode.......................................................................10

ConﬁgurationModeSettings................................................................11

RemoteSensorWhenUsedasOutdoorSensor .................................................15

HeatPumpwithElectricBackup ...........................................................15

HeatPumpwithGas/OilBackup............................................................15

ModeofOperation........................................................................19

ButtonFunctions.........................................................................20

OperatingModes.........................................................................21

TestingtheThermostat....................................................................24

SettingtheTimeandDayoftheWeek ........................................................25

Programming............................................................................26

LockoutFeature..........................................................................28

FactoryPreprogramming...................................................................29

PersonalProgramSchedule.................................................................29

SimpleSetTM FieldProgramming..............................................................31

Troubleshooting..........................................................................32

Parts Diagram

S1 S2 R C W

O/B GY1 W2 W3Y2

RESET CONFIG

Conﬁguration switch

Reset switch

Left (system)

button

Right (fan)

button

Down button

Up button

Field programming pins

Specications

Icon Descriptions

Fan operation icon

Cooling operation icon

Heating operation icon

Lock mode

activated

Room

temperature

offset activated

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: 3-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, W3

Package Contents/Tools Required

Package includes: SC5812 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 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.

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. Conﬁgure thermostat (see Page 13) 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” (Page 24).

Wiring Diagrams

120

VAC 24 VAC

Heat #1

Cool #1

Heat #2

Cool #2

Fan

Heat #3

Transformer

Heat/Cool Systems

Optional

remote or

outdoor sensor

120

VAC 24 VAC

Reversing Valve

Compressor

Auxiliary Heat #1

Fan

Auxiliary Heat #2

Single Compressor

heat pump with electric backup

Dual Compressor

heat pump with electric backup

120

VAC 24 VAC

Reversing Valve

Compressor #1

Auxiliary Heat

Compressor #2

Fan

Transformer

Optional

remote or

outdoor sensor

Transformer

Optional

remote or

outdoor sensor

Single Compressor

heat pump with gas/oil backup

Dual Compressor

heat pump with gas/oil backup

120

VAC 24 VAC

Reversing Valve

Compressor

Oil/Gas Heat

Fan

120

VAC 24 VAC

Reversing Valve

Compressor #1

Oil/Gas Heat

Fan

Compressor #2

Transformer

Optional

remote or

outdoor sensor

Transformer

Optional

remote or

outdoor sensor

Remote Sensor Installation (Optional)

Terminals S1 and S2 can be used for an outdoor sensor or for an indoor remote sensor.

The outdoor sensor is used to change system operation based on the outdoor temperature. It can be used for heat

pumps with gas/oil backup or heat pumps with electric backup.

The indoor remote sensor is used to read the indoor temperature in a different location. This is beneﬁcial when the

thermostat is not mounted in the ideal location.

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 is recommended.

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 17,

Page 17) or use it for an outdoor sensor for heat pump systems (see Page 9).

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.)

R – 24 VAC hot

C – 24 VAC common

W1/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 1 compressor heat pump and non-hp, 3rd stage heat for 2 compressor heat

pump systems

Y2 – 2nd stage cool for 2 compressor systems, 2nd stage heat for 2 compressor heat pump systems

G – Fan

W3 – 3rd stage heat for non-hp systems and 1 compressor heat pump 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 Y1,W2,W3,G,B

Heat Pump (Two Compressors) Y1,G,O Y1,Y2,G,O Y1,G,B Y1,Y2,G,B Y1,Y2,W2,G,B

Dual Fuel (One Compressor) Y1,G,O Y1,G,O Y1,G,B W2 W2,W3

Dual Fuel (Two Compressors) Y1,G,O Y1,Y2,G,O Y1,G,B Y1,Y2,G,B W2

Emergency Heat (Heat Pump Only) N/A N/A W2,G W2,W3,G N/A

* G not energized when conﬁgured as a gas/oil system

The SC5812 thermostat is conﬁgurable for all systems. The conﬁguration directly affects the outputs.

Use the output chart to correctly conﬁgure and wire the thermostat to your system.

SC5812 Output Chart

Conguration Mode

OFF

1. Verify the SC5812 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.

Note: Do not force open. Use a small coin or slotted screwdriver to release tabs if necessary.

To exit conﬁguration mode, press the CONFIG switch for 1 second.

Press the up or down button to change settings within each screen.

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

button

Right

button

The conﬁguration mode is used to set the SC5812 to match your heating/cooling system. The SC5812

functions with heat pump, air conditioning, gas, oil or electric heat systems.

To conﬁgure the SC5812, perform the following steps:

3. Press the CONFIG button for 1 second while the SC5812 is in OFF mode.

CONFIG

S1 S2 R C W

O/B GY1 W2 W3Y2

RESET CONFIG

Conguration Mode Settings

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.

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.

4. 3rd Stage Temperature Differential (1°F to 5°F) (0.5°C to 2.5°C)

Set the number of degrees between when stage 2 turns on and when

stage 3 turns on.

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 Conﬁguration Mode are as follows:

5. 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 (best for dual fuel)

Note: For 2 compressor heat pumps and multi-stage gas/oil systems,

stage 3 is staged off independently when SO is set to O.

Press the up or down button to set.

Press the right button to advance to the next screen.

6. 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.

7. 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.

8. Dual Fuel System

Appears only if heat pump is selected.

1 = Heat pump with gas/oil furnace backup

0 = Heat pump with electric backup

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

9. Outdoor Upper Setpoint (50°F to 25°F, – –) (10°C to -4.0°C, – –)

Appears only if heat pump is selected.

Note:

See chart on Page 15 for more information

For Heat Pumps With Gas/Oil Backup

When the ambient temperature is below the selected temperature, the heat

pump will be locked out and only the furnace will operate.

For Heat Pumps With Electric Backup

When the ambient temperature is above the selected temperature, the heat

pump will operate and electric backup will be locked out.

Press the up or down button to select temperature.

Press the right button to advance to the next screen.

10. Outdoor Lower Setpoint (select – – to disable)

Appears only for heat pump with electric backup with outdoor upper

setpoint enabled.

Note:

See chart on Page 15 for more information

When the ambient temperature is below the selected temperature, heat

pump is locked out and only electric heat will operate

Press the up or down button to select temperature.

Press the right button to advance to the next screen.

See “Remote Sensor When Used as Outdoor Sensor” diagram on next page.

Remote Sensor When Used as Outdoor Sensor

Heat Pump with

Electric Backup

Heat pump operation only

Both heat pump and

electric backup

Electric backup only

Upper setpoint

Lower setpoint

°F/C

Outdoor

Temperature

Outdoor

Temperature

Upper setpoint

Heat pump operation only

Gas/oil operation only

°F/C

Heat Pump with

Gas/Oil Backup

12. Lockout (0-8°, NITE, COOL-HEAT)

Select the number of degrees set temperature can be changed during

keypad lockout or select to lockout during NITE period only. COOL-HEAT

lockout allows adjustment of the set temperatures to the maximum heat

set temperature selected in Step 13 and minimum cool set temperature

selected in Step 14.

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.

13. 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.

14. 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.

11. 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.

17. Temperature Sensor (1-4)

Appears for non-heat pump systems and heat pumps without

an outdoor sensor.

1. Only on-board sensor determines room temperature.

2. Only remote sensor determines room temperature.

3. Average temperature of on-board and remote sensor.

4. Only on-board sensor will be used until NITE period, and then only

remote sensor is used.

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.

16. 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.

15. 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.

19. Status Indicator Light (Led 0, 1, 2, 3)

0 = Status indicator never on

1 = Status indicator on with ﬁrst stage

2 = Status indicator on with second stage

3 = Status indicator on with third stage

Press the up or down button to select.

Press the CONFIG button for 2 seconds to exit conﬁguration.

OFF

18. 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.

Table of contents

ICM Controls SC 5812 User manual