ICM Controls SC 3801 Owner's Manual

2 Heat/2 Cool

7-Day Programmable

Hardwired

SC 3801

Programmable Electronic Thermostat

• Programmable and Configurable

• Single/Dual Stage Heat Pump Systems

• Single/Dual Stage Heat/Cool Systems

• Backlit Display

• Auto Changeover

• Simpleset® 7 Day Programming

• Compatible with Gas, Oil, or Electric

• Title 24 Compliant/No Batteries Required

• Relay Outputs
(minimum voltage drop in thermostat)

• Ideally Suited for:
–

Residential (New Construction/Replacement), Light Commercial

Owners Manual

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visit us at www.icmcontrols.com

2

The SC3801 is a programmable, auto changeover, two stage heat, two stage cool thermostat. It functions
with air conditioning, heat pumps, gas, oil, or electric heat.

The thermostat activates a heating appliance when the room temperature is below the set heat
temperature (by the differential temperature). The red status indicator may come on with first or second
stage, depending on configuration. When the room temperature drops further, the second stage (auxiliary)
heat is activated. The heating is staged off when the room temperature increases. With heat pumps,
the thermostat will not let the compressor come on for four minutes after it turns off. This protects your
compressor. Emergency heat mode can be used to bypass heat pump operation, making auxiliary heat first
stage.

When the room temperature is greater than the set cool temperature (by the differential temperature), the
first stage cooling device is activated. The green status indicator may come on with first or second stage,
depending on configuration. If the room temperature increases, the second stage cooling device will be
activated. The cooling is staged off when the room temperature decreases. The thermostat will not let the
compressor come on for four minutes after it turns off. This protects your compressor.

The SC3801 has the following operating modes: OFF, Heat, Emergency Heat, Cool, Cool and Heat, and
Program mode. In OFF mode, the thermostat will not turn on heating or cooling devices. The indoor fan can
be turned on in all operating modes using the fan switch. In the Heat mode, the thermostat controls the
heating system. Emergency Heat mode can be utilized if a heat pump malfunction occurs. In the Cool mode,
the thermostat controls the cooling system. In the Cool and Heat mode, the thermostat controls both the
cooling and heating systems. In Program mode, the thermostat will automatically be controlled by the set
program. Program mode can function with Heat mode, Cool mode, Cool and Heat mode or OFF mode (for
Programmable fan option only). The clock display alternates with the set temperature display for Cool and
Heat mode.

The program schedule can be overridden by changing the set temperature ( or ). This puts the SC3801
thermostat into a 2-hour temporary hold. After 2 hours, it will automatically return to the program schedule.

The SC3801 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.

Mode of Operation

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Program Overview These are the possible operating modes for the SC3801

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 sliding the

Auto/On switch to ON.

Note: To enter Programming Fan Only Mode, press the button once. Only the indoor fan

will operate during that period if it is activated in the program setup.

Cool Mode

In this mode, the thermostat controls the cooling system.
Note: There is a four-minute delay for your compressor to restart after it has turned off.

Heat Mode

In this mode, the thermostat controls the heating system.
Note: For heat pumps, there is a four-minute delay for your compressor to restart after it

has turned off.

Emergency Heat Mode (Heat pump systems only)

In this mode, heat pump system will be bypassed and auxiliary heat becomes first stage heat.
Note: Enter Emergency Heat from non-program heat mode by pressing the button for

10 seconds.

Note: Exit Emergency Heat by pressing the button for 10 seconds.

Cool and Heat Mode

The thermostat controls the heating and cooling systems, automatically changing over from one to
the other as required.

Operating modes continued on Page 4

Operating Modes

4

Operating Mode (continued)

Program Mode

In this mode, the program function is on, and the thermostat will automatically be
controlled by the set program. Program mode can function with Heat mode, Cool
mode, Cool and Heat mode or OFF mode (for Programmable fan option only).

Press the button to enter and exit program mode. PROG displays when in program
mode.

Program Mode Hold

The program schedule can be overridden by changing the set temperature ( or ). After 2 hours, the
program schedule will automatically be resumed. To return to the program schedule manually, press the
button twice.

The time and day of the week must be set for your program schedule to operate correctly.

1. Verify thermostat is in non-programmable mode (use the button to exit prog mode).

2. Press and release button until OFF mode displays.

3. Press the button in for 6 seconds.

4. Press the or button to adjust the time.

5. Press the button while the time is displayed. The display shows the day

currently set on the thermostat (1=Monday, 2=Tuesday, etc).

6. Press the or button to set the correct day of the week that today is.

Note: Press the button in for 5 seconds to lock values into memory or

press the button once to enter programming.

Setting the Time and Day of the Week