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See Figure 4. Ignore any wires which may be present, but which were not connected to the old thermostat. Terminal Screws Figure 4 • Be sure to tighten the terminal screws securely, as a loose wire could cause operational problems with your system or thermostat. • Push excess wire back into the hole to prevent interference when installing the thermostat to the wallplate. • Set the System Switch to “off”, and the Fan Switch to “auto”. • On the back of the thermostat are the System Set-Up Switches. See Figure 5. If the heat pump system has an electric auxiliary system, then slide the #1 switch to HE position. If the heat pump system has a gas auxiliary system, then slide #1 switch to the HG position. To set up the LCD display to show the temperature in Fahrenheit, slide the #2 switch to the F position. To set up the LCD display to show the temperature in Celsius, then slide the #2 switch to the C position. 12HEHGFC System Set-Up Switches Figure 5 • Insert the tabs on top of the thermostat body into the slots at the top of the wallplate. Press the bottom of the thermostat body into the snap on the bottom of the wallplate. (NOTE: Do not force the thermostat onto the wallplate, as the terminal pins may be damaged. If it does not snap properly, the thermostat may not work.) • Turn on power to the heat pump system. • If the wiring to the thermostat has been correctly connected, and if the thermostat has been correctly mounted to the wallplate, then the LCD Display should show the indoor room temperature. THERMOSTAT CONTROLS • Open the thermostat’s front cover. See Figure 6. Figure 6 Switches and Buttons H G A F B sys aux em system em heat fan heat auto off refresh E cool filter C reset on D Switches and Buttons A LCD Readout - displays indoor temperature, set temperature, and information about the heat pump system’s operation and status. B System Switch - “em heat” is the Emergency Heat. NOTE: The Emergency Heat Mode is not an energy saving mode, so use it only when necessary. “heat” is the normal heat mode. “off” turns the system off. “cool” is the normal cooling mode. C Fan Switch - In Auto mode, the fan runs when the system is on for heating or cooling. The Refresh mode sets the fan to run automatically at intervals of 10, 15, 20, or 30 minutes out of every hour when the system is not running for heating or cooling. In the On mode, the fan runs continuously regardless of system status. D Reset button - push the Reset button with the end of a paper clip to reset the thermostat and return to its previous settings. E Filter button - resets the filter time counter. F Down button - used to change the temperature setting and the option settings. G Up button - used to change the temperature setting and the option settings. H System LED’s - for heat pump systems that have fault detection capabilities, the “sys” LED glows red when the thermostat has detected a fault through the L terminal connection from the heat pump. The “em” LED glows red when Emergency Heat is turned on. The “aux” LED glows green when the auxiliary heat is turned on. LCD Display A K B C J D I E G H F LCD Display A temp - the large number being displayed is either the indoor temperature or the set temperature. B em - emergency heat is turned on. C heat - normal heat is turned on. D cool - normal cooling is turned on. E fan - indicates the fan is running. F st 1 - comes on when you set the Stage 1 heat and cool span. G st 2 - comes on when you set the Stage 2 heat and cool span. H Filter button - resets the filter time counter. I alpha-numeric - displays temperature (either indoor or set). J C - the temperature being displayed is Celsius. Select either Celsius or Fahrenheit with the #2 System Set-Up Switch. NOTE: The LCD Display DOES NOT show an “F” for Fahrenheit. K set - the large number being displayed is the set value (temperature, Stage 1 span, Stage 2 span, Residual Cooling Fan Delay, or the Refresh Fan Cycle time). NOTE: With the “system” switch in the “off” position, if you press the Up or Down button, the LCD Display will show “OF”. OPERATION systemoffcoolheatem heat Review the Set Temperature 1. Slide the “system” switch to either the “heat” position or the “cool” position. 2. Press either the Up or Down button for less than one second. The LCD Display will show “temp”, “set”, and the set temperature. “heat” position “cool” position Change the Set Temperature 1. Press and hold either the Up or Down button for more than one second. The LCD Display will show “temp”, “set”, the set temperature. 2. To raise the Set Temperature, press the Up button. To lower the Set Temperature, press the Down Button. Up Button Down Button fanautorefreshon Heating or Cooling 1. To set the system for Heating, slide the “system” switch to “heat”. To set the system for Cooling, slide the “syst...

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