Controlling the Fan Operation

Fan Modes

If backlight is not on continuous, press the screen anywhere to turn on the backlight. Press the OPTIONS tab to access the FAN mode control.

Press FAN button; repeated presses scroll through all the modes, AUTO, ON, and CIRC (circulate).

SAUTO

S

ON

fan is NOT following the schedule and runs continuously

 

until it is changed from the OPTIONS screen.

S

CIRC

fan is following schedule and cycles during periods of

 

equipment inactivity. Cycle time is dependent on user settings

 

FAN CIRCULATE (Page 10).

If FAN mode displays AUTO and ON or CIRC was selected during scheduling for the current period, the thermostat will indicate the current fan mode in the information display (FAN ON or FAN CIRC).

In the CIRC mode, the user can cycle the fan for a programmed percentage of active time per hour, during periods of equipment inactivity (i.e., heating or cooling equipment not running). The fan is ON

for 5 minutes at a time. The user may change the percentage of ON time that the fan is on (see FAN CIRCULATE [Page 10]):

Fan Program

The user can program the fan to be ON, AUTO, or CIRC during a program event period. While scheduling the event, if the fan is set to ON, it will remain on during the entire event. If it is set to CIRC, it will circulate during equipment inactivity per user programmable cycles (see FAN CIRCULATE, Page 10). If set to AUTO, the fan will come on with the equipment to serve the heating/cooling demand and go off accordingly.

NOTE − When the OPTIONS screen FAN mode is changed to ON or CIRC, whatever was scheduled is ignored − the fan will either be ON or it will CIRCULATE per the user−programmed intervals (USER SETTINGS − FAN CIRCULATE (Page 10). When FAN − AUTO is selected in the OPTIONS screen, the schedule IS followed.

In the CIRC mode, the user can cycle the fan for a programmed percentage of active time per hour, during periods of equipment inactivity (i.e., heating or cooling equipment not running). The fan is ON for 5 minutes at a time. The user may change the percentage of ON time that the fan is on (see FAN CIRCULATE [Page 10]):

Controlling the Schedule

If backlight is not on continuous, press the screen anywhere to turn on the backlight.

From the HOME screen press SCHED; repeated presses toggle the schedule ON and OFF. If ON, the system follows the program developed by the user (Page 7).

If OFF, the system operates as a non−programmable thermostat user must make changes when desired. The autochangeover feature continues to operate based on the manual user inputs.

The fan mode is displayed on the SCHEDULE screen when program- ming the thermostat and can be changed only during schedule editing (after EDIT is pressed). Fan settings in OPTIONS screen will OVER- RIDE the scheduled fan operation.

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Lennox International Inc l7742u Controlling the Fan Operation, Controlling the Schedule, Fan Modes, Fan Program
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l7742u, comfortsense 7000 series touch screen programmable thermostat specifications

Lennox International Inc. is renowned for its innovative heating, ventilation, and air conditioning (HVAC) solutions, and the ComfortSense 7000 Series Touch Screen Programmable Thermostat, model L7742U, stands as a testament to its commitment to energy efficiency and user-friendly design. This advanced thermostat combines cutting-edge technology with an intuitive interface, making it an ideal choice for homeowners looking to enhance comfort while managing energy costs.

One of the standout features of the ComfortSense 7000 Series is its large, easy-to-read, full-color touch screen display. This enables users to navigate the thermostat’s settings and programming options effortlessly. The interface is designed to provide clear visibility, even in low light conditions, ensuring that managing your home’s climate is straightforward at any time of day.

The thermostat allows for flexible programming, accommodating up to four separate time periods in a single day, which can be customized for heating and cooling settings. This programmable feature means users can optimize their HVAC usage according to their daily schedules, leading to potential energy savings and increased comfort when they need it most.

Another significant characteristic of the L7742U model is its compatibility with a wide range of heating and cooling systems. This versatility enables homeowners to integrate the thermostat with both conventional and advanced HVAC systems, including heat pumps and multi-stage units, which enhances its appeal across various applications.

The ComfortSense 7000 Series also includes smart features that allow for remote access. When connected to Wi-Fi, users can adjust their home’s temperature settings from their smartphones or tablets using the Lennox mobile app. This feature is particularly valuable for homeowners who want to make adjustments while away from home, ensuring that indoor conditions remain pleasant upon their return.

Moreover, the thermostat is designed with energy efficiency in mind. It utilizes advanced technologies, such as energy usage reports and reminders for regular maintenance checks, empowering users to take charge of their energy consumption. This can lead to reduced utility bills and a smaller environmental footprint.

In conclusion, the Lennox ComfortSense 7000 Series Touch Screen Programmable Thermostat, model L7742U, is a sophisticated yet user-friendly device that enhances the overall efficiency and comfort of home environments. Its advanced programming capabilities, smart technologies, and compatibility with various HVAC systems make it a smart choice for today’s energy-conscious homeowners. With Lennox’s commitment to quality, users can expect reliability and performance that meets the demands of modern living.
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