ICM Controls SC 4211 Instrucciones generales

2-Stage Heat Pump

Auto Changeover

Hardwire

SC 4211

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 Pump Systems

• Large Display With Backlight

• Selectable Fahrenheit or Celsius

• SimpleSet™ Field Programming

• Status Indicator Lights

• Relay Outputs

(minimum voltage drop in thermostat)

• Remote Sensor Compatible

• Ideally Suited for:

– Residential (New Construction/Replacement)

– Light Commercial

Non-Programmable Electronic Thermostat

Table of Contents

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

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

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

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

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

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

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

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

SingleCompressorheatpumpwithelectricbackup ..............................................5

DualCompressorheatpumpwithelectricbackup................................................5

RemoteSensorInstallation(Optional)..........................................................6

Terminal Designator Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

SC4211 Output Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

ConﬁgurationMode........................................................................8

ConﬁgurationModeSettings.................................................................9

ModeofOperation........................................................................14

ButtonFunctions.........................................................................15

OperatingModes.........................................................................16

LEDIndicators...........................................................................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

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 conﬁguration: 2-stage heat pump

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, L, R, C, O/B, Y1, W2, Y2, G, E

Emergency heat

indicator

Package Contents/Tools Required

Package includes: SC4211 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

• 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 8) 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).

Single Compressor

heat pump with electric backup

Dual Compressor

heat pump with electric backup

* outdoor sensor only reads outdoor temperature

Transformer

120

VAC 24 VAC

Reversing Valve

Compressor

Auxiliary Heat

Optional

remote or

outdoor sensor

Service Led Wire

Emergency Heat

Fan

Compressor #2

Transformer

120

VAC 24 VAC

Reversing Valve

Compressor #1

Auxiliary Heat

Optional

remote or

outdoor sensor

Service Led Wire

Emergency Heat

Fan

Wiring Diagrams

Note: For systems without emergency strip heat, a jumper wire should be placed between W2 & E.

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 12) 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.)

(Shown: Optional ICM ACC-RT103 Remote Indoor Sensor; for outdoor sensor, order ACC-OD103.)

Terminal Designator Descriptions

1ST Cool 2ND Cool 1ST Heat 2ND Heat

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 N/A N/A E, G E, W2, G

SC4211 Output Chart

L – Service Led indicator

R – 24 VAC hot

C – 24 VAC common

O/B – Conﬁgurable

O – cool active reversing valve

B – heat active reversing valve

Y1 – 1st stage cool, 1st stage heat

W2 – 2nd stage heat for single compressor systems, 2nd stage for Emergency heat

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

G – Fan

E – 1st stage heat for Emergency heat mode

The SC4211 thermostat is conﬁgurable for most heat pump systems. The conﬁguration directly affects

the outputs.

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

Conguration Mode

OFF

1. Verify the SC4211 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 SC4211 is in OFF mode.

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 SC4211 to match your heat pump system.

To conﬁgure the SC4211, perform the following steps:

CONFIG

S1 S2 R C W

O/B GY1 W2 W3Y2

RESET CONFIG

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