Aprilaire 61000652C 8400 Tstat installation instructions Outdoor temperature sensor optional

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Installation

Outdoor temperature sensor (optional)

Outdoor temperature can be measured by attaching an 8052 sensor to the S1 and S2 terminals. System setting #05 (Remote sensor) is used to enable sensor.

Heat pump models can use the outdoor temperature to effectively utilize the heat pump:

•When the outdoor temperature is less than the Low Balance Point, the heat pump will be locked out and only auxiliary heating will be used.

•When the outdoor temperature is higher than the High Balance Point, the auxiliary heating will be locked out and only the heat pump will be used to provide heating.

•Install on side of building out of direct sunlight

(north side recommended)..

•Mount above snow line.

•Mount at least 3’ away from exhaust vents and condensing lines..

•Maximum wire length is 300’.

•Do not route wires along 120 VAC lines.

RC R

S1 S2 O/B L

W2 Y2

61000652C 8400 Tstat Install.indd 4

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Contents Safety Installation Instructions Table of contents Installation Do not mount thermostatOutdoor temperature sensor optional Thermostat mounting Power & Reset options For heat pump models 8446, 8448HP, 8465, 8466HPWiring terminal Wire specifications Installation notesWiring Model 8463 & 8444 Two Transformers Remove Jumper Wire Wiring Model 8465 & 8446 Two Transformers Remove Jumper Wire RC R RC R W Y G C S1 S2 O/B L W2 Y2 Setup & Testing System setup instructionsSW1 Auto mode is disabled FahrenheitNo offset applied MinutesProgressive recovery is enabled 1F 0.5CB energized in cooling O 3F 2C20F -7C 60F 16CSystem test mode Test steps areSystem test mode How to enter the system test menu Press Press and holdSystem Setting Display Output Test steps for 8444Test steps for 8448HC & 8466HC Test steps for 8446 Test steps for 8448HP & 8466HP Quick Reference to controls & Display Non-Programmable models 8444, 8446Programmable models 8463, 8465 All 8400 series thermostats Thermostat FeaturesProgrammable models only 8463, 8465 Temperature settings do not change TroubleshootingDisplay is blank Heating equipment is running in cool mode Fan does not turn on in a call for heatHeat/cool both on at same time Heating is not displayedEnvironment SpecificationsElectrical Thermal

61000652C 8400 Tstat specifications

The Aprilaire 61000652C 8400 T-stat is an advanced thermostat designed to optimize indoor climate control, enhance energy efficiency, and provide users with an intuitive experience. Its design is user-friendly, making it suitable for both tech-savvy individuals and those less familiar with smart home technologies.

One of the standout features of the Aprilaire 8400 T-stat is its large, easy-to-read LCD display. This display not only presents the current temperature in the home but also shows humidity levels, time, and system status. The clear visibility of this information helps homeowners stay informed about their indoor environment at a glance.

The thermostat is equipped with a 7-day programmable schedule, allowing users to set different temperatures for various times of the day or week. This function means that the thermostat can automatically adjust heating and cooling settings to match your lifestyle, which can lead to significant energy savings. With up to four programmable periods per day, the Aprilaire 8400 can adapt to busy schedules effectively.

Moreover, the Aprilaire 61000652C integrates advanced humidity control features. Maintaining proper humidity levels is essential for comfort and health, and this thermostat helps regulate humidity by working seamlessly with the home’s heating and cooling systems. It can also control humidification and dehumidification systems, providing a comprehensive solution for all-weather comfort.

Another innovative characteristic of the Aprilaire 8400 is its compatibility with multi-stage heating and cooling systems. This means the thermostat can manage both single and multi-stage HVAC systems, including heat pumps, making it a versatile choice for various home setups.

Additionally, the Aprilaire 8400 offers advanced diagnostic capabilities. It can alert users to potential issues with HVAC systems through error codes displayed on the screen. This feature ensures proactive maintenance, helping homeowners avoid costly repairs.

In terms of installation, the Aprilaire 61000652C is designed for easy mounting on walls and includes comprehensive installation instructions, ensuring that even those with minimal experience can set it up with ease.

Overall, the Aprilaire 61000652C 8400 T-stat combines user-friendly features, advanced technology, and energy-efficient capabilities, making it an exceptional choice for modern home comfort management. Whether you’re a homeowner looking to optimize your indoor climate or seeking to enhance your HVAC system's efficiency, this thermostat rises to the occasion with its robust functionalities.