Thermostat Reset

Under some abnormal conditions, it may be desirable to the thermostat to its default condition. This can be useful on rare occasions when the the thermostat is behav- ing abnormally (e.g. after an electrical storm or power out- age). The RESET button can be used to recover from this situation.

The RESET button is an unlabeled, recessed button lo- cated behind the door on the right−hand side of the thermo- stat, just below the SETTINGS button. The RESET button is visible in figure 3. Use a paper clip or small pencil to press the RESET button. After the RESET button is pressed, the thermostat settings will return to the defaults listed in the Default Settings section.

Default Thermostat Settings

Default thermostat settings are in table 1.

Table 1. Default Thermostat Settings

Mode	Heat

Setpoint	70°F (or 21°C)

Fan	Auto

Filter Reminder	OFF (reminder setting = 0)

Equipment Protection	Reset back to zero
Timers

Technical Specifications

Thermostat Type

Electronic nonprogrammable thermostat for 1H/1C, gas or electric heat, non−heat pump, non−power robbing applica- tions.

Power Supply Range

18VAC − 30VAC (24VAC nominal), 60Hz

Temperature Display

Display Scale: Fahrenheit or Celsius user selectable (via DIP switches)

Display range: 35°F (2°C) to 99°F (37°C)

Display resolution: 1°F (1°C)

Display Accuracy: +/−1°F

Temperature Measurement Range

Measurement Scale: Fahrenheit

Measurement Range: 35°F to 99°F

Measurement Resolution: 0.5°F

Measurement Accuracy: +/−1°F

Field Offset: via DIP switches to +/−3°F

Sampling Method: temperature measurements sampled every 15 seconds. Displayed temperature is the average of the last four measurements.

Temperature Setpoint Range

Setting range: 50°F (10°C) to 90°F (32°C)

Setting resolution: 1°F (1°C)

Fan Control

AUTO or ON modes, gas or electric heat compatible via DIP switches (also see Thermostat Output section).

I/O Relays

All thermostat relays are latching type to minimize power consumption.

1..HEAT/COOL relay output

2..FAN relay output

3..SERVICE relay input

Equipment Protection Timers

Minimum Compressor OFF time: 5 minutes

Minimum Compressor ON time: 4 minutes

Minimum Furnace ON time: 3 minutes

Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 min- utes.

Minimum elapsed time between any compressor activa- tion and the next compressor activation: 6 minutes.

NOTE − All protection timers (except the compressor OFF timer) can be over−ridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or COOL buttons.

Equipment Protection Override

Both the minimum compressor OFF timer and the mini- mum equipment cycle timer can be over−ridden by press- ing and holding either the HEAT or COOL button down for 4 seconds.

Over−Temperature Protection

Thermal mechanical switch opens W1 at 93°F+/−6°F.

Filter Reminder

Settings of 0 (Off), 1, 3, 6 or 12 months are available. When programmed time has elapsed, a FILTER indicator is dis- played.

Service Reminder

The SERVICE indicator is displayed only under the follow- ing conditions:

Sif the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the R terminal;

Sif the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the C terminal.

Page 5

L3011C THERMOSTAT

ComfortSenset 3000 Series Non-Programmable Thermostat, L3011C specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, and the ComfortSense 3000 Series Non-Programmable Thermostat, model L3011C, is a testament to the company's commitment to quality and innovation. Designed for homeowners who prioritize simplicity without sacrificing efficiency, this thermostat brings together user-friendly features and advanced technology for optimal climate control.

One of the standout features of the L3011C is its intuitive interface. The large, backlit display provides clear visibility of temperature settings and system status, ensuring that users can easily read and adjust their thermostat even in low-light conditions. The simple, straightforward controls make it easy to set the desired temperature without the confusion that often accompanies more complex programmable models.

In terms of functionality, the ComfortSense 3000 series supports a range of heating and cooling systems, making it a versatile choice for many households. Whether your home uses gas, electric, or heat pump systems, the L3011C is compatible, allowing for seamless integration and efficient operation. This adaptability ensures that homeowners can maintain their ideal comfort levels year-round without needing to invest in multiple thermostats.

Another key characteristic of the L3011C is its energy efficiency. By maintaining consistent temperature settings, the thermostat helps reduce energy consumption, ultimately leading to cost savings on utility bills. The user can also easily switch between heating and cooling modes, making it a practical solution for fluctuating seasonal needs.

Durability is yet another highlight, as the ComfortSense 3000 is built with high-quality materials to ensure long-lasting performance. The thermostat is designed to withstand everyday use while maintaining accuracy in temperature regulation—a crucial feature for comfort control.

Safety features such as battery backup ensure that the thermostat continues to function seamlessly even during power outages, providing reliability when it matters most.

In summary, the Lennox ComfortSense 3000 Series Non-Programmable Thermostat, L3011C, combines effectiveness, simplicity, and reliability into one user-friendly device. With its intuitive interface, broad compatibility, energy efficiency, and durable design, it is an excellent choice for homeowners seeking straightforward climate control solutions. Lennox's dedication to quality is evident in the L3011C, making it a valuable addition to any home.