61000651B 8400 Tstat Owners.indd 3 7/23/09 10:43:02 AM AbOUT yOUR NEw THERmOSTAT – NON-pROgRAmmAblE mODElS AbOUT yOUR NEw THERmOSTAT – NON-pROgRAmmAblE mODElS CONTROlS & DISplAy OVERVIEw – mODElS 8444, 8446, 8448 CURRENT INDOOR TEMPERATURE SySTEM MODE SETTINg SySTEM MODE (PAgE 6) FAN SETTINg (PAgE 7) FAN SETTINg BATTERy DOOR OUTDOOR TEMPERATURE (OPTIONAL) TEMPERATURE SETTINg EQUIPMENT STATUS UP DOWN HEAT pUmp mODElS ONly EMERgENCy HEAT (RED) SySTEM FAULT (yELLOW) INDICATOR SHOWS THROUgH HOUSINg

For example, if the Water Panel Change Alert value is set to show the first alert in October, then a second alert will appear in January. An alert will not be displayed again until the next October, and the cycle repeats. Press the LIGHT button when the humidifier type value has been set. LIGHT ADJUST WATER PANEL WATER PANEL LIGHT ADJUST WATER PANEL WATER PANEL 9. Air Filter Change Indicator – Use this feature to remind the homeowner when an air filter change is needed. Use the ADJUST – Up and A

The air conditioning system should turn on within a few seconds. NOTE: When in the COOL mode (or HEAT for single stage heat pumps), once the thermostat turns off, a built in 5-minute delay prevents the system from turning on again. This protects the compressor. No additional time delay relay is required. 3. Put the COOL-OFF-HEAT-EM switch into the OFF position. The air conditioning system should turn off. 4. Put the COOL-OFF-HEAT-EM switch into the HEAT position. 5. Press the > button until the

• HEAT: In the “ HEAt” mode a Flame “ “ icon appears on the display, which flickers when the furnace is running. • AUTO (Models 8534 and 8538 only): In the “ AUtO” mode, the heating and cooling system will operate in either the “ HEAt” or “ COOL” mode depending on which current setting the room temperature is closest to. Note that both the Snowflake “ “ and Flame “ “ icons appear on the display. – 7 – 110-7/12/9:14 Page 2. Select the temperature to be used by pressing the DAY/ NIGHT button until

Only use your fingertips. THERMOSTAT fEATURES • Large touch screen with adjustable backlight – constant backlight available. • Message center provides feedback and instructions. • 7 day programmability or separately programmable weekday/weekend schedules. • Thermostat can be removed from the wall for easy programming (batteries must be installed). • Front battery door access for fast, easy replacement. • Displays room temperature, temperature setting, and optional outdoor temperature. • Air filt

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Getting Familiar With The Aprilaire ® Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . 3 • Temperature Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 • Mode Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 • Temperature Settings – Day/Night Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • Fan Button. . . . . . . .

Therefore, it is suggested actual time you want your home to reach the desired temperature. For example, 6 degree setback, set your Morning event at 6:00 AM to be sure the desired temperature is reached by 7:00 AM. NOTE: This thermostat can be programmed with either 2 events per day (day and night) or day, evening, and night). Before programming the thermostat, decide which setting is best The thermostat is factory preset for 4 events per day. To change to two events per day, refer to page 20 “O

9. Return the Mode switch to the Off position to stop the cool call. MODELS 8346 & 8365 ONLY 10. Slide the Mode switch to the E-Heat position. 11. Use the ADJUST – Up button to raise the temperature 2°-3° above the current room temperature. The W2 and G terminals will energize, “E-HEAT” on the display will begin to flash and the heating equipment should start. MODE Cool • Off • Heat MODE Cool • Off • Heat • E-Heat SU ROOM AM F SETOVERRIDE Flashes on Heat Call ADJUST E-HEAT 12. Return the Mode sw

Place the thermostat wire opening over the wall opening. If replacing a thermostat, place the thermostat to cover the old thermostat silhouette. The base of the thermostat is raised to allow for wire routing behind the thermostat. 2. Level the thermostat (for appearance only) and mark the mounting hole locations. 3. Drill a 3/16” dia. hole at the marked locations and install drywall anchors (included). Drywall anchors should be used unless installing on paneling or other hard surfaces. Anchors s

When the thermostat is calling for heat, the flame flickers and the snowflake goes off. When cooling, the snowflake flickers and the flame goes off. LIMITED OVERRIDE When the keyboard is locked (DIP switch #2 ON), the user may override the temperature setpoint hour by pressing either the . or . button. The range of temperature override is ±6°F or the programmed daytime setpoint. Your new digital thermostat has been designed to provide accurate control and display of room temperature. In addition