Aprilaire 8355 user manual Features, Replacing Existing Thermostat

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Features

•Four pre-programmed setpoints for each day of the week.

•Fast and easy programming for setting all days of the week simultaneously.

•Energy efficient recovery.

•Residual cooling for added air-conditioning efficiency.

•Two “AA” ENERGIZER brand batteries retain program memory, even during power outages.

•Low battery indicator.

•Multi-colored LED indicators for system status.

•Zone compatible as master thermostat.

•Fahrenheit/Celsius display option.

•Programmable from 45°F (7°C) to 90°F (32°C).

•Accuracy within ±1 degree.

•Adjustable temperature differential: 1-3 degrees.

•Maintains summer and winter programming.

Replacing Existing Thermostat

1.Turn off power to heating and cooling system.

2.Remove cover of old thermostat to expose wires. Do not disconnect wires. (Fig. 1)

3.Label wires per Table 1.

TABLE 1

Old Label

New Label

Description

R, V-VR or VR-R

R

24 VAC

 

 

 

Y, Y1 or M

Y1

Stage 1 Cooling/Heating Circuit

 

 

 

O or R

O

Reversing Valve (Cooling Mode)

B

B

Reversing Valve (Heating Mode)

G or F

G

Fan Contactor Circuit

Y2

Y2

2nd Stage Cooling Circuit

W1 or W2 or W-U

W2

2nd Stage Heating Circuit

 

 

 

L or X

L

System Monitor LED

 

 

 

E

E

Emergency Heating Circuit

 

 

 

C, X or B

C

24 VAC, Transformer Common Side

NOTE: This thermostat requires a 24V AC common wire for proper operation.

4.After labeling wires, remove wires from terminals.

5.Remove existing thermostat base from wall.

6.Refer to the following section for instructions on how to install thermostat.

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Contents Model Features Replacing Existing ThermostatMark placement of mounting holes. See . Set base aside Installing the Model 8355 ThermostatRemove the cover using a coin or screwdriver Secure base to wall with supplied screws Programming Guide Changing Fahrenheit F to Celsius C Energy Efficient RecoverySimple Programming Mode Press SET To change Morn time Setting Daily ProgrammingBegin Programmed Operation Manual Operation ResetTemporary Program Override Put the COOL-OFF-HEAT-EM switch into the Heat position LED IndicatorsPress the button until the temperature To Test ThermostatTroubleshooting Wiring Diagrams Aprilaire Model 8355 Heat Pump ThermostatCYC 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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