8400 Series Thermostats Owner’s Manual Includes Operating Instructions and Warranty Information READ AND SAVE THESE INSTRUCTIONS 61000651B 8400 Tstat Owners.
Table of contents About your new thermostat Thermostat features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to identify your thermostat’s model number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About your new thermostat Thermostat Features All 8400 series thermostats • Large, clear, backlit display is easy to read – even in the dark • Displays room temperature, temperature setting, and optional outdoor temperature • Front battery door access for fast, easy replacement • Built in compressor protection • Circulation fan mode for air cleaning • Air filter, humidifier, dehumidifier, and HVAC service indicators • Auto backlight (activated with first button press) Programmable models only (8463,
About your new thermostat – Non-programmable models Controls & display overview – models 8444, 8446, 8448 Current Indoor Temperature System Mode Setting Outdoor Temperature (OPTIONAL) Temperature SetTING Equipment Status System Mode (page 6) UP Fan Setting (page 7) down Heat pump models only Emergency heat (RED) Fan Setting System FAULT (YELLOW) Indicator shows through housing Quick Reference Card Battery Door Message Center 4 Low Battery Warning (page 7) Note: Backlight is activated with first
About your new thermostat – Programmable Models Controls & display overview – models 8463, 8465, 8466 Current Indoor Temperature Current Time Outdoor Temperature (OPTIONAL) System Mode Setting Temperature SetTING Fan Setting Equipment Status UP System Mode (page 6) down Fan Setting (page 7) Hold Program Heat pump models only Emergency heat (RED) System FAULT (YELLOW) Current Schedule Period (page 8) Indicator shows through housing Quick Reference Card Battery Door Message Center Low Bat
Operation – ALL MODELS Select system mode (OFF/HEAT/EM-HEAT/COOL/AUTO) Press Change temperature setTING Applies to programmable versions (8463, 8465, 8466) when in HOLD mode. to select: AUTO: Thermostat automatically selects heating or cooling depending on the indoor temperature. OFF: Heating and cooling systems are off. Press In AUTO use COOL setting. or to adjust the current setting. to switch between the HEAT and HEAT: Thermostat controls only the heating system.
Operation – ALL MODELS Select fan setting (ON/AUTO/CIRC) Reset service reminder messages Press and hold and together for three seconds to reset a service reminder message. Battery installation and reset button RESET BUTTON Press to select: ON: Fan runs continuously. Use this mode for maximum air circulation/air cleaning. AUTO: Fan runs only when the heating or cooling system is on. CIRC: Same as AUTO, but if the fan has been off for 20 minutes the fan will be activated for a 10 minute cycle.
Operation & Programming – PROGRAMMABLE MODELS ONLY (8463, 8465, 8466) Set time and day Understanding program schedules 1. Press to enter time setting mode. Hour and AM/PM are flashing. The daily schedule is split into four sections: WAKE: 6am-8am – Temperature you would prefer to wake up to, until you leave for the day. LEAVE: 8am-5pm – Temperature when you are away from the house during the day. RETURN: 5pm-10pm – Temperature you would prefer to return to, until bedtime.
Operation & Programming – PROGRAMMABLE MODELS ONLY (8463, 8465, 8466) Understanding program schedules (continued) Set temps Event Event designator Start time Heat Cool 1 WAKE 6:00AM 70°F (21°C) 78°F (26°C) 2 LEAVE 8:00AM 62°F (17°C) 85°F (29°C) 3 RETURN 5:00PM 70°F (21°C) 78°F (26°C) 4 SLEEP 10:00PM 62°F (17°C) 82°F (28°C) Progressive recovery The Progressive Recovery feature allows the thermostat to activate the heating and cooling equipment prior to an event in order to reach the
Operation & Programming – PROGRAMMABLE MODELS ONLY (8463, 8465, 8466) Changing program schedules 1. Press twice to enter program setting mode. Start time of the WAKE event is flashing. 4. Press 2. Press 3. Press or to adjust the start time , HEAT setting flashes. Press to adjust the heat setting. or , COOL setting flashes. Press to adjust the cool setting. or 5. Press to advance the next event, and repeat steps 2-5 for LEAVE, RETURN and SLEEP events. 6. Press to change to weekend program.
Operation & Programming – PROGRAMMABLE MODELS ONLY (8463, 8465, 8466) Program schedule overrides (temporary, permanent) Temporary program override Permanent program override or to immediately adjust the Press temperature. This will temporarily override the temperature setting for the current programmed time period. The new temperature setting will be maintained until the next time period of the programmed schedule. to permanently hold the temperature at Press its current setting.
ELECTRONIC THERMOSTAT FIVE YEAR LIMITED WARRANTY Your Research Products Corporation Aprilaire® Thermostat unit is expressly warranted for five (5) years from date of installation to be free from defects in materials or workmanship.
