INSTALLATION MANUAL This manual covers the following models: •THBF721 Thermostat Applications Guide Description Gas or Oil Heat Electric Furnace Heat Pump (No Aux. or Emergency Heat) Heat Pump (With Aux.
INSTALLATION TIPS Wall locations The thermostat should be installed approximately 4 to 5 feet above the floor. Select an area with average temperature and good air circulation. NO YES NO Do not install thermostat: • • • • • • Tip Near hot or cold air ducts In direct sunlight On an outside adjacent wall In areas that do not require conditioning Near dead spots or drafts (in corners or behind doors) Near concealed chimneys or pipes Pick an installation location that is easy for the user to access.
SUBBASE INSTALLATION A A Caution: Electrical Hazard Failure to disconnect the power before beginning to install this product can cause electrical shock or equipment damage. For a vertical mount put one screw top and one screw bottom. Mercury Notice: All of our products are mercury free. However, if the product you are replacing contains mercury, dispose of it properly. Your local waste management authority can give you instructions on recycling and proper disposal.
WIRING 1 Turn off Power to Heating/Cooling System CJCJ CJ CJ CJCJ CJCJ CJCJ CJCJ I
WIRING 3 Label Wires with Tags Label the wires using the supplied wire labels as you disconnect them. Wiring Labels Apply these wiring labels to each wire with the appropriate terminal designation as you remove it from the existing thermostat. Etiquettes de fils Wire Labels R6tulos para los cables Lorsque vous retirez les fils des bornes du thermostat existant. collez ces etiquettes sur chaque fil correspondant � la lettre de la borne. Coloque estos r6tulos, con la designaci6n de las termina • les.
WIRING 5 Mount New Wallplate Mount the new wallplate using the included screws and anchors. • Drill 3/16-in. holes for drywall Drill 3/16-in.
WIRING 6 Connect Wires Match the wire labels. If the labels do not match the letters on the thermostat, refer to "Alternate Wiring (Conventional Systems)" on page 9 and connect the terminal accordingly (see notes below).
WIRING Alternate Wiring {Conventional Systems) If the labels do not match letters on the thermostat, refer to the chart below and connect the terminal accordingly (see notes below). A A A A C 0 B W/EW2 A A • A A y G R If a C or X wire is available, connect with the C terminal. If there is no C or X wire, there is no need to connect with C terminal. If you have a heat pump without auxiliary/backup, connect O OR B. Do not connect both. If you do not have a heat pump, do not connect B.
WIRING A Caution: Electrical Hazard Failure to disconnect the power before beginning to install this product can cause electrical shock or equipment damage. Wiring 1 . If you are replacing a thermostat, make note of the terminal connections on the thermostat that is being replaced. In some cases the wiring connections will not be color coded. For example, the green wire may not be connected to the G terminal. 2. Loosen the terminal block screws. Insert wires then retighten terminal block screws. 3.
WIRING A A A A Power supply Use either O or B terminals for changeover valve Optional 24 VAC common connection when thermostat is used in battery power mode. Jumper (not supplied) 2H/1 C Heat Pump System C R V C W/E G W2 @@ @@ @@ @@ @@ @@ COMPRESSOR RELAY ' FAN RELAY AUXILIAR Y L2 L 1 (HOT) A COOL CHANGE OVER VALVE HEAT CHANGE OVER VALVE Note: In many systems with no emergency heat relay, a jumper can be used between E and W2.
TECHNICIAN SETUP MENU Technician Setup Menu T his thermostat has a technician setup menu for easy installer configuration. To setup the thermostat for your particular application: 1. Press MENU button 2. Press and hold TECH SET button for 3 seconds. T his 3 second delay is designed so that homeowners do not accidentally access the installer settings. 3. Configure the installer options as desired using the table below.
TECHNICIAN SETUP MENU Feature Filter Change Reminder Feature Description This feature will flash "FILT" in the display after the elapsed run time to remind the user to change the filter. A setting of "off' will disable this feature. This feature allows the installer Room to change the calibration of the Temperature room temperature display. For Calibration example, if the thermostat reads 70'F and you would like it to read 72'F then select +2.
Technician Setup Menu Feature Feature Description The compressor short cycle Compressor delay protects the compressor from "short cycling". this feature Short Cycle will not allow the compressor to Delay be turned on for 5 minutes ofter if was last turned off. Cooling Swing Heating Swing The swing setting, often called "cycle rate", "differential" or "anticipation", is adjustable. A smaller swing setting will cause more frequent cycles and a larger swing setting will cause fewer cycles.
Technician Setup Menu Tech Settings F orC Select F for Fahenheit temperature read out, or select C for Celsius temperature read out. LCD Will Show Adjustment Options F for Fahrenheit C for Celsius Done Next Step 12 or 24 You can Select either a 12 or 24 HourClock hour clock setting. Default c'i Prev Step Use the + or - key to select 12 12 Houl'i or 24 hour clock. Clock Dono Fan Operation Select GAS for sytems that control the fan during a call for heat.
MOUNT THERMOSTAT & BATTERY INSTALL ATION Mount Thermostat Align the 4 tabs on the subbase with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place. Mon "'=="") "'=="") -------==""� _ r,1-, �� Battery Installation Battery installation is optional if thermostat is hardwired (C terminal connected). • Insert 2 AAA alkaline batteries. 1.5V AAA I I t5V AAA Operating instructions can be found on the back of the battery door.
PROGRAMMING THE THERMOSTAT Set Time Follow the steps below to set the day of the week and current time: 1. 2. 3. 4. Press MENU Press SET TIME Day of the week will be flashing. Use the Press NEXT STEP 5. The current hour will be flashing. Use the current hour. 6. Press NEXT STEP 7. Minutes will be flashing. Use the 8 8 9 8 9 or key to select the current day of the week. keys to select a.m. or p.m. the or \;] key to select the current minutes. 8.
