Honeywell RTH2520B Owner's Manual - Page 2

2.3.1 2-wire Heating 2.3.2 2-wire Cooling Jumper Heat relay 2.3.3 3-wire Heating Jumper Cool relay 2.3.4 3-wire Cooling Jumper Heat relay Fan relay Jumper Cool relay Fan relay 2.3.5 4-wire Heating and Cooling 2.4 Setting JP2 Jumper The jumper specifies how the fan will operate when it is placed in automatic mode (see section 3.2). HG Leave the jumper in this position if you have a gas or oil heating system. HE Move the jumper to this position if you have an electric heating system. 2.5 Installing the Batteries JP2 jumper  Gently pull out the battery cover.  Install the batteries as shown. Observe the polarity.  Reinstall the battery cover. You will hear a clicking sound. After the batteries are installed, the thermostat performs a sequence of tests for approximately 5 seconds. Afterwards, the screen displays the actual temperature. It is normal that the displayed temperature be higher than the ambient temperature if you are holding the thermostat. Once installed on the wall, the thermostat will display the ambient temperature. By default, the setpoint is 70°F (21°C). The time and day settings flash to indicate that they must be set (see section 5.1). 2.6 Completing the Installation Jumper Heat relay Cool relay Fan relay 2.3.6 5-wire Heating and Cooling Fan relay Heat relay Cool relay Note: Remove the red jumper wire between terminals Rc and Rh. RTH2520  Once the baseplate and the batteries are installed, mount the thermostat on the baseplate.  Secure the thermostat using the locking screw and install the faceplate.  Apply power back to the system. 3. Basic Functions 3.1 System Operating Mode Use this selector switch to place the system in Heating mode (HEAT) or Cooling mode (COOL), or to set both modes to Off. Note: When you place the thermostat in Cooling mode, you might need to wait up to five minutes before cooling can start. This is a safety feature for the compressor. will flash on the screen during the delay. 69-1867ES-05 03-11 2/8