Setup: 1source S1-THEC11P5S Programmable Digital Thermostat Owner Manual

Overview

The S1-THEC11P5S Programmable Digital Thermostat is a single-stage heating and single-stage cooling controller for many residential HVAC systems. It supports a 5+2-day schedule, allowing one program for Monday through Friday and another for Saturday and Sunday.

Use the thermostat in manual mode for direct temperature control or in programmed mode for automatic comfort settings throughout the day. The backlit display shows room temperature, target temperature, operating mode, day, time, program period, battery status, and filter-service information.

Specifications

• Model: S1-THEC11P5S
• System capacity: 1 heat and 1 cool
• Programming: 5+2-day schedule
• Daily periods: Morning, Day, Evening, and Night
• Power: Two AA alkaline batteries or 24-volt system power
• Display: Backlit digital display
• Temperature scales: Fahrenheit or Celsius
• Service reminder: Adjustable filter indicator based on blower operating hours

Detailed Description

The thermostat compares the current room temperature with the selected heating or cooling setpoint. When the room requires conditioning, it signals the connected HVAC equipment and displays the applicable HEAT or COOL indicator. The indicator flashes while that function is energized.

The front controls include COOLER and WARMER buttons for changing the target temperature, a MODE switch for selecting Cool, Off, or Heat, and a FAN switch for selecting Auto or On. In Auto, the blower operates when the system is heating or cooling. In On, the blower runs continuously.

A three-position Program switch controls the operating style. RUN activates the programmed schedule, OFF provides manual heating or cooling, and SET opens the clock, schedule, and advanced configuration screens. The NEXT button moves through programming steps and setup options.

Safety

• Disconnect electrical power to the heater and air conditioner before removing an existing thermostat or installing this thermostat.
• Follow the installation instructions carefully. Installation and wiring should be performed by a qualified HVAC professional when required.
• Replace both AA alkaline batteries at least every 12 months. Annual replacement is especially important where freezing temperatures could prevent the heating system from starting.
• Replace the batteries immediately when the low-battery symbol appears. Exhausted batteries can prevent the heating system from operating.
• If the thermostat uses 24-volt system power, keep the batteries installed. They help maintain the clock during a power interruption.
• Temperature-sensor calibration should be performed by a trained HVAC technician.

Setup and Operation

Set the Clock and Day

1. Move the Program switch to SET.
2. When the clock flashes, use COOLER or WARMER to adjust the time.
3. Hold either temperature button to change the time more quickly.
4. Press NEXT to move to the day setting.
5. Use COOLER or WARMER to select the current day, then press NEXT to continue.

Manual Operation

1. Move the Program switch to OFF.
2. Select Heat or Cool with the MODE switch. Select Off when neither function is required.
3. Set the FAN switch to Auto for demand-based blower operation or On for continuous fan operation.
4. Press COOLER or WARMER to select the desired temperature.

Manual operation does not follow the stored time periods. The thermostat responds to the selected mode and target temperature until the controls are changed.

Programmed Operation

1. Move the Program switch to SET.
2. Use COOLER or WARMER to change the flashing value or selection.
3. Press NEXT after each item to advance through the programming screens.
4. Set the current time and day before entering the schedule.
5. For Monday through Friday, set the start time, cooling temperature, and heating temperature for Morning, Day, Evening, and Night.
6. For Saturday and Sunday, repeat the same four-period setup.
7. Move the Program switch to RUN when programming is complete.

Each period has its own start time and heat and cool setpoints. A temporary temperature adjustment is allowed during programmed operation, but the thermostat returns to the programmed values when the next period begins.

Advanced Setup

Advanced settings are normally configured during installation. To enter this area, move the Program switch to SET, wait for the clock to flash, and hold NEXT for five seconds until the advanced setup screen appears.

• Cycles per hour: Select 2 through 6 cycles per hour, or the available no-limit options for appropriate zoning applications. A six-cycle setting limits equipment activation to approximately once every ten minutes.
• Deadband: Adjust the separation between heating and cooling changeover settings from 1 to 6 degrees.
• Temperature scale: Select Fahrenheit or Celsius.
• Backlight: Choose Off, a timed 2-, 4-, 6-, or 8-second period, or continuous operation when system power is available.
• Filter reminder: Set the blower-hour threshold from 0 to 1950 hours. A setting of 0 disables the reminder.

Press NEXT to move between advanced settings. Move the Program switch to RUN or OFF to exit the advanced setup screens.

Filter Reminder

The filter symbol appears after the blower has accumulated the selected number of operating hours. The counter includes fan operation during heating, cooling, and independent fan use.

After servicing or replacing the HVAC filter, press and hold RESET FILTER until the symbol disappears and the counter returns to zero.

Restore Factory Defaults

Factory reset removes stored time-period programming and advanced settings. Enter advanced setup by moving the Program switch to SET and holding NEXT for five seconds after the clock begins flashing. When the cycles-per-hour setting is flashing, hold NEXT until the reset screen appears, then hold NEXT again as directed by the display. Move the Program switch to RUN or OFF to return to normal operation.

Use this procedure only when a complete reset is intended because previously entered settings may be permanently lost.

Temperature Calibration

Calibration is normally unnecessary. If the displayed room temperature requires correction, enter advanced setup, advance to the calibration screen, and adjust the reading with COOLER or WARMER. Press NEXT to store the value. Have a qualified HVAC technician perform this adjustment.

Replace the Batteries

1. Press down on the battery cover located on the front of the thermostat.
2. Pull the cover outward to open the battery compartment.
3. Remove both old batteries.
4. Install two new AA alkaline batteries in the indicated orientation.
5. Insert the bottom hook of the cover into its slot.
6. Snap the cover closed.

Install fresh batteries as soon as the low-battery indicator appears. Keep batteries installed even when the thermostat is connected to 24-volt power so the clock can continue during a power interruption.

Troubleshooting

• The display shows a low-battery symbol: Replace both AA alkaline batteries immediately.
• The heater does not start: Check whether the batteries are exhausted, especially during freezing conditions. Confirm that the MODE switch is set to Heat and that the target temperature requires heating.
• The fan runs continuously: Move the FAN switch from On to Auto if continuous blower operation is not desired.
• The programmed schedule is not active: Move the Program switch to RUN. The OFF position disables time-period programming and provides manual control.
• The filter symbol remains visible: Press and hold RESET FILTER after cleaning or replacing the filter.
• The time or schedule is incorrect: Move the Program switch to SET and review the current day, clock, and four programmed periods for weekdays and weekends.
• The temperature reading appears inaccurate: Do not change calibration casually. Have a trained HVAC technician verify the reading and perform calibration if necessary.

Warranty

The thermostat includes a one-year limited warranty against defects in materials and workmanship beginning on the date of original installation. The stated coverage applies to the original installation location and covers the defective part, subject to the warranty terms.

Labor, diagnosis, removal, installation, shipping, servicing, and handling costs are excluded from this coverage unless addressed by a separate installer warranty. The warranty does not cover normal maintenance, improper installation or operation, unauthorized modification, electrical-service problems, environmental damage, unsuitable replacement parts, fuel or electricity costs, or special indirect and consequential damages where exclusions are permitted.

Pros & Cons

• Pros: 5+2-day scheduling, four daily periods, manual override, backlit display, Fahrenheit/Celsius selection, battery or system power, adjustable cycles per hour, and a blower-hour filter reminder.
• Cons: The control is limited to one heating stage and one cooling stage, and advanced configuration and calibration require careful navigation through the display or professional assistance.

The S1-THEC11P5S Programmable Digital Thermostat combines straightforward manual control with flexible weekday and weekend scheduling. Correct battery maintenance, proper Program-switch selection, and accurate clock setup are the key steps for dependable operation.