1. Turn power off to the heating and cooling systems. 2. Place COOL-OFF-HEAT In OFF position. 3. Place FAN: AUTO-ON switch Into AUTO position. 4. Remove the cover using a coin or screwdriver. 5. Place thermostat against the wall at desired location. Make sure wires will feed through opening on base of thermostat. 6. Mark placement of mounting holes. See Fig. 3. Set base aside. 7. Drill the marked holes using a 3/16" drill bit. NOTE: Enclosed plastic anchors do not require drilled hole for drywal

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

This thermostat is not a 120 volt (line voltage) device. Improper installation may cause serious injury from electrical shock. This product must be installed by a qualified heating & air conditioning contractor in accordance with NEC Standards and applicable local and state codes. Mercury is toxic and may be hazardous to your health. Any replaced thermostats containing mercury must be disposed of properly. Contact local authorities for disposal information. SPECIFICATIONS Comfort Range 60°F – 80

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

See Fig. 3. Set base aside. 3 Figure 3 PROG MAN CHANGE SET AUTO/MAN Elec Gas RHAM PM MORN DAY EVE NITE RC W Y G FAN AUTO ON MOUNTING HOLES COOL OFF HEAT 7. Drill the marked holes using a 3/16” drill bit. Note: Enclosed plastic anchors do not require a drilled hole for drywall. 8. Tap plastic anchors into the wall. 9. Align base with plastic anchors and feed wires through opening. See Fig 4. Figure 4 PROG MAN CHANGE SET AUTO/MAN Elec Gas RHAM PM MORN DAY EVE NITE RC W Y G FAN AUTO ONCOOL OFF HEAT

• Read all of the information in this manual before installing or programming this thermostat. • This is a 24V AC low-voltage thermostat. Do not install on voltages higher than 30V AC. • All wiring must conform to local and national building and electrical codes and ordinances. • Do not short (jumper) across terminals on the gas valve or at the system control to test installation. This will damage the thermostat and void the warranty. 1 Features • Four pre-programmed setpoints for each day of th

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

REV VALVE DEFROSTSERVICE FAN RELAY AUX. HEAT R HEAT/BLOWER EQUIPMENT C G W2 Y1 1ST STAGE COMPRESSOR L1L2120 VAC 24 VAC R G Y W2 O/B C L COOL HEAT LO ON AUTO CHECKAUX APRILAIRE MODEL 8346 OR 8365 THERMOSTAT REDBLKWHTYLWORGBLU BLU ORG YLW WHT GRN BLK RED ORG RED BLK GRN YLW WHT BLU REDBLUBLKWHTORGYLW NOTES: 1. Wire colors shown for reference only. 2. Common (C) connection requiredonly for thermostat LED operation. SEE NOTE 2 Step 6. Install supplied batteries Install two new AA alkaline batteries

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

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