iT500 User Reference Manual26INSTALLATION PROGRAMMINGInstallation Setup ModeThe following installation setup options can be set:1. System Configuration – One Central Heating Zone, Two Central Heating Zones or One Central HeatingZone plus Hot Water.2. Heating Mode or Cooling mode for the selected System Configuration.3. Whether temperature is to be displayed in Centigrade or Fahrenheit.4. The Time Zone setting, for example GMT, GMT+1 etc.5. Whether or not Daylight Saving is on.The default settings that the iT500 comes with are:• One Central Heating Zone, Heating Mode, temperature in Centigrade, GMT, and DST turned on.)Entering Installation Setup ModeUnless the display is already on, press the Display ON button . The display then switches on with the Homescreen displayed.Press and hold down both the Settings button and the Increase button together for two seconds. TheiT500 will then go into Installation Setup mode.The first setting to be specified is the system configuration. While in Installation Setup mode, if this or anyother setting is already set the way you want, just press the Confirm button to accept that setting and goto the next setup option.For example, if the system configuration is already set to the required option, press the Confirm button tostep through to the Heating or Cooling mode selection option.Press and hold to exit Installation Setup Mode and return to Normal mode at any time.