ICM Controls SC 4811 Istruzioni generali

2 Heat/2 Cool

Auto Changeover

Hardwire

SC 4811

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/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

Table of Contents

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

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

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

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

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

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

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

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

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

Single Compressor heat pump with electric backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

RemoteSensorInstallation(Optional)................................................... 7

Terminal Designator Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SC4811 Output Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ConﬁgurationMode ................................................................. 9

ConﬁgurationModeSettings......................................................... 10

ModeofOperation................................................................. 15

ButtonFunctions.................................................................. 16

OperatingModes.................................................................. 17

TestingtheThermostat............................................................. 18

LockoutFeature................................................................... 19

SimpleSetTM FieldProgramming....................................................... 20

Troubleshooting................................................................... 21

Parts Diagram

Conﬁguration switch

Reset switch

Left (system)

button

Right (fan)

button

Down button

Up button

Field programming pins

S1 S2 R C W

O/B GY1 W2 Y2

RESET CONFIG

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: 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 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 11) 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 18).

Wiring Diagrams

120

VAC 24 VAC

Heat #1

Cool #1

Heat #2

Cool #2

Fan

Transformer

Heat/Cool Systems

Optional

remote or

outdoor sensor

* outdoor sensor only reads outdoor temperature

120

VAC 24 VAC

Reversing Valve

Compressor

Auxiliary Heat #1

Fan

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

* outdoor sensor only reads outdoor temperature

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.

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 non-heat pump systems

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

G – Fan

Terminal Designator Descriptions

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 conﬁgured as a gas/oil system

The SC4811 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.

SC4811 Output Chart

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