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Electronic
Thermostats
MODEL 8344 HEAT/COOL NON-PROGRAMMABLE
MODEL 8346 HEAT PUMP NON-PROGRAMMABLE
MODEL 8348 HEAT/COOL MULTI-STAGE NON-PROGRAMMABLE
MODEL 8363 HEAT/COOL 5/2 DAY PROGRAMMABLE
MODEL 8365 HEAT PUMP 5/2 DAY PROGRAMMABLE
MODEL 8366 HEAT/COOL MULTI-STAGE 5/2 DAY PROGRAMMABLE
Installation Manual
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WARNINGS 120 volts may cause serious injury from electrical shock. Disconnect electrical power to the furnace & air conditioner before starting installation. 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 re
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THERMOSTAT INSTALLATION INSTRUCTIONS Step1. Choose a location to mount the thermostat • Approximately 5 feet off the floor (refer to local codes for compliance with the Americans with Disabilities Act). • On an interior wall where the temperature is most representative of the zone being controlled by the thermostat. • At least 18 inches away from an outside wall. DO NOT MOUNT THERMOSTAT… • Behind doors, in corners or other dead air spaces. • In direct sunlight, near lamps or other sources of hea
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Step 3. Mount the thermostat on the wall There are two sets of mounting holes – one set for use when mounting to a junction box, another set for direct wall mounting. IMPORTANT! TURN OFF POWER AT THE HVAC EQUIPMENT BEFORE PROCEEDING WITH THERMOSTAT INSTALLATION! Mounting the thermostat directly to the wall (without junction box) 1. 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 therm
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Mounting the thermostat to a junction box 1. Install the top j-box screw (not included), until the head is approximately 1/8” from the surface of the wall. 2. Slide the thermostat on to the top screw. 3. Install the bottom screw (not included) to finish the installation. Mounting the Thermostat to a Junction Box Step 4. Set the ELEC/GAS switch to the proper position (Models 8344, 8348, 8363 and 8366 only) Set ELEC/GAS switch Setting the switch to ELEC will cause the ELEC G terminal to energize
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Set the O/B reversing valve jumper in the proper position (Models 8346 and 8365 only) The thermostat comes with an O/B terminal which can be configured to be an ‘O’ terminal (for most heat pumps) or to be a ‘B’ terminal. Configure as an ‘O’ terminal if the heat pump reversing valve has heating as the default position, configure as a ‘B’ terminal if the reversing valve has cooling as the default position. CONSULT WITH THE HEAT PUMP MANUFACTURER TO DETERMINE WHICH CONFIGURATION IS NEEDED. O/B Rev
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Step 5. Wire the thermostat IMPORTANT! ENSURE THE POWER AT THE HVAC EQUIPMENT IS OFF. 1. Make sure the fan switch is set to Auto and the Mode switch is set to Off. 2. Strip 2” of cable insulation. 3. Strip 1/4” of insulation from each wire. Do not cut into the wire when stripping insulation, as this can lead to eventual control failure. 4. Secure the wires to the thermostat terminal strip according to the wiring diagram for the model being installed (See Diagrams 1, 2 & 3). Use a slotted screw d
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Diagram 2 – Model 8348 or 8366 Thermostat Wiring HEAT/BLOWER EQUIPMENT 2ND APRILAIRE MODEL 8348 STAGE W2 OR 8366 THERMOSTAT HEAT 2ND STAGE COOL Y2 1ST W2 LO STAGE W1 HEAT HI 1ST STAGE Y1 W COOL FAN G RELAY GAS C ELEC 24 VAC R Y2 120 Y VAC AUTO COOLING EQUIPMENT G ON 2ND RC STG Y2 COOL RH 1ST STG Y1 COOL HI opens at 100°F±9°F C LO closes at 41°F±9°F 7 L2 L1
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Diagram 3 – Model 8346 or 8365 Thermostat Wiring OUTDOOR HEAT PUMP UNIT NOTES: 1ST STG 1. Wire colors shown COMP. for reference only. REV 2. Common (C) VALVE connection required only for thermostat LED operation. AUX CHECK L BLU W2 WHT LO HEAT/BLOWER EQUIPMENT BLU Y ORG YLW 1ST STAGE COMPRESSOR Y1 YLW AUTO AUX. G W2 WHT GRN HEAT ON FAN G GRN RELAY O/B HEAT ORG COOL C BLK 24 R RED VAC R RED C BLK APRILAIRE MODEL 8346 120 OR 8365 THERMOSTAT VAC SEE NOTE 2 Step 6. Install supplied batteries Install
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Step 8. Perform check-out CAUTION The following procedure will turn on the heating and cooling equipment. Do not attempt to turn on the cooling equipment when the outdoor temperature is too low or the heat pump (heating) when the outdoor temperature is too high as compressor damage could occur. Consult the equipment manufacturer literature for safe operating temperatures. 1. Slide the Fan switch to the On position. FAN The blower should come on. Return the Fan switch to the Auto position. • Aut
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5. Return the Mode switch to the Off position to stop the heat call. 6. Slide the Mode switch to the Cool position. 7. Use the ADJUST – Down button to lower the temperature 2°- 3° below the current room temperature. “COOL” on the display will begin to flash and the cooling equipment should start. MODE F Flashes on OVERRIDE ROOM SET Cool Call AM • • Cool Off Heat ADJUST COOL SU 8. MODELS 8348 & 8366 ONLY – Lower the temperature MODE an additional 2°- 3° and confirm that the second stage of coolin
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Step 9. Set up temperature scale, differential, offset and Water Panel/filter change indicators 1. Slide the Mode switch to the Off position. 2. Press and hold both the ADJUST – Up and Down buttons until “ROOM” and “OFF” are no longer displayed. Press and Hold Simultaneously for Three (3) Seconds ADJUST 3. °F/°C – Use the ADJUST – Up button to toggle between °F and °C. Press the LIGHT button when desired scale has been selected. F C LIGHT ADJUST 4. Differential Setting (d1) – The unit is ship
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6. Temperature Offset (OF) – All thermostats are factory calibrated to be within 1° of true temperature. Offset is available to allow for agreement with field temperature measuring instruments. Use the ADJUST – Up or ADJUST – Down button to change the offset value between –4° and +4°. Press the LIGHT button when the desired offset value has been set. OR LIGHT ADJUST ADJUST 7. Water Panel Change Indicator Feature – Use this feature if the home has a whole house humidifier such as an Aprilaire Hum
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WATER PANEL WATER PANEL LIGHT ADJUST 9. Air Filter Change Indicator – Use this feature to remind the homeowner when an air filter change is needed. Use the ADJUST – Up and ADJUST – Down buttons to select the number of months between recommended filter changes. Use 1 or 3 for panel type filters and 6 or 12 for extended (pleated) media type filters. TABLE 1 lists general recommendations, refer to manufacturer literature for recommendations on the filter in your particular application. Set to 12 if
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10. Weekend Events – Use this feature to set the number of events for the ® weekend program. The default value is 4 events (The ENERGYSTAR setting), which will result in the “LEAVE” and “RETURN” events to be used during programmed operation. If the owners schedule is such that the home or building is generally occupied during the weekends, switch to 2 events on the weekend. This will cause the “LEAVE” and “RETURN” events to be ignored during programmed operation. Press the ADJUST – Up or ADJUST
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Press the CURRENT TIME button to enter the minutes value and access the “day of the week” value. Use the ADJUST – Up and ADJUST – Down buttons to set the current day of the week. CURRENT TIME Adjust Day of the Week AM [Advance Time] MO ADJUST Press the CURRENT TIME button again to finish. The word “DONE” will appear on the display. CURRENT TIME DONE [Advance Time] ® As an ENERGYSTAR partner, the thermostat (Models 8363, 8365 and 8366 only) has been pre-programmed with economical times and tempe
