Aprilaire 8355 To Test Thermostat, LED Indicators, Press the button until the temperature

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To Test Thermostat

WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.

CAUTION: Do not switch system to cool if the temperature is below 50°F (10°C). This can damage the air conditioning system and cause personal injury.

1.Place the COOL-OFF-HEAT-EM switch into the COOL position

COOL-OFF-HEAT-EM

2. Press the >button until the temperature

setting is at least 3 degrees below the room temperature. The air conditioning system should turn on within a few seconds.

NOTE: While in the Cool or Heat mode once the thermostat turns the system off, a built-in delay keeps the compressor from turning on for about 5 minutes. This protects the compressor. No additional time delay relay (delay on break) is necessary.

3.Put the COOL-OFF-HEAT-EM switch into the OFF position. The air conditioning system should turn off. The fan may continue to run for a short period of time.

4.Put the COOL-OFF-HEAT-EM switch into the HEAT position.

COOL-OFF-HEAT-EM

COOL-OFF-HEAT-EM

5. Press the> button until the temperature setting is at least

3 degrees above room temperature. The heating system should turn on. The fan may not turn on immediately, depending upon the fan delay built into the furnace.

6.Put the COOL-OFF-HEAT-EM switch into the OFF position. The heating system should turn off. Once again, the fan may have a delay.

7.Put the FAN: AUTO-ON switch to the ON position. The blower fan should turn on.

8.Put the FAN: AUTO-ON switch to the AUTO position. The blower fan should turn off.

COOL-OFF-HEAT-EM

FAN: AUTO - ON

FAN: AUTO-ON

LED Indicators

The LED indicators are used to indicate system activity. The AUX indicator illuminates during a call for second stage heating. The auxiliary stages are used to maintain comfort during extremes in weather conditions. If the AUX LED is illuminated too frequently during periods of moderate temper- ature, check the differential settings (page 5).

The CHECK indicator is used to monitor system status. If the CHECK indicator is illuminated, call your local HVAC service provider.

The EMER indicator is illuminated only when the system switch is moved to the EM, emergency heat position. The EM position is only used when the primary stage of heat is not functioning or requires service.

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Contents Model Replacing Existing Thermostat FeaturesInstalling the Model 8355 Thermostat Remove the cover using a coin or screwdriverMark placement of mounting holes. See . Set base aside Secure base to wall with supplied screws Programming Guide Energy Efficient Recovery Simple Programming ModeChanging Fahrenheit F to Celsius C Setting Daily Programming Begin Programmed OperationPress SET To change Morn time Reset Temporary Program OverrideManual Operation Press the button until the temperature LED IndicatorsPut the COOL-OFF-HEAT-EM switch into the Heat position To Test ThermostatTroubleshooting Aprilaire Model 8355 Heat Pump Thermostat Wiring DiagramsCYC Series Heat Pump Systems Heat Pump Systems York Lennox LOW Voltage Terminal Board Limited Warranty

8355 specifications

The Aprilaire 8355 is a sophisticated and advanced thermostat designed to enhance your home comfort while optimizing energy efficiency. This model is particularly well-suited for homeowners looking for seamless integration with their existing HVAC systems while benefitting from modern smart technology.

One of the standout features of the Aprilaire 8355 is its user-friendly interface. The large, backlit display makes it easy to read and navigate, even in low-light conditions. The intuitive layout allows users to access various settings quickly, ensuring that adjustments can be made without hassle.

The device incorporates advanced programming capabilities, allowing homeowners to set schedules based on their daily routines. This feature enables the thermostat to intelligently adjust the temperature when the house is empty and revert to comfortable levels before the family returns home. The programmable settings can lead to significant energy savings over time, reducing utility bills while maintaining a pleasant indoor environment.

Another notable technology integrated into the Aprilaire 8355 is its humidity control system. Unlike many standard thermostats, this model actively monitors and manages indoor humidity levels. This is particularly beneficial in regions with varying climate conditions, preventing excess moisture or dryness that can lead to mold growth or discomfort.

The thermostat also supports Wi-Fi connectivity, facilitating remote access through a smartphone app. Homeowners can monitor and adjust their home’s temperature and humidity levels from anywhere, making it an ideal choice for individuals who frequently travel or spend time away from home.

Additionally, the Aprilaire 8355 is designed with compatibility in mind, working effectively with various HVAC systems, including two-stage heating and cooling setups. This versatility means that the thermostat can be easily integrated into a wide range of homes, making it a flexible option for both new builds and retrofits.

Energy Star certified, the Aprilaire 8355 is engineered to promote energy conservation. With its built-in features aimed at reducing energy consumption, users can reduce their carbon footprint while enjoying year-round comfort.

In summary, the Aprilaire 8355 is a powerful thermostat that combines extensive programming features, humidity management, and remote connectivity. Its focus on user-friendliness and energy efficiency makes it a smart investment for homeowners aiming to enhance their living environment while reducing energy costs.
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