Carrier TC Supplement Manual

12User InterfaceThe user interface consists of a 2--line LCD display and a4--button keypad on the front of the economizer controller.2 LINELCDMENU UP(EXIT)BUTTONSCROLLUP/DOWNBUTTONSSELECT(ENTER)BUTTONC14206Fig. 9 -- W7220 ControllerKeypadThe four navigation buttons (see Fig. 9) are used to scrollthrough the menus and menu items, select menu items,and to change parameter and configuration settings.Using the Keypad with MenusTo use the keypad when working with menus:S Press the (Up arrow) button to move to the previousmenu.S Press the (Down arrow) button to move to the nextmenu.S Press the (Enter) button to display the first item inthe currently displayed menu.S Press the (Menu Up/Exit) button to exit a menu’sitem and return to the list of menus.Using the Keypad with Settings and ParametersTo use the keypad when working with Setpoints, Systemand Advanced Settings, Checkout tests and Alarms:1. Navigate to the desired menu.2. Press the (Enter) button to display the first item inthe currently displayed menu.3. Use the and buttons to scroll to the desiredparameter.4. Press the (Enter) button to display the value of thecurrently displayed item.5. Press the button to increase (change) the displayedparameter value.6. Press the button to decrease (change) the displayedparameter value.NOTE: When values are displayed, pressing andholding the or button causes thedisplay to automatically increment.7. Press the (Enter) button to accept the displayedvalue and store it in nonvolatile RAM.8. “CHANGE STORED” displays.9. Press the (Enter) button to return to the currentmenu parameter.10. Press the (Menu Up/Exit) button to return to theprevious menu.Menu StructureTable 5, starting on page 13, illustrates the completehierarchy of menus and parameters for the EconoMi$er Xsystem.The Menus in display order are:S STATUSS SETPOINTSS SYSTEM SETUPS ADVANCED SETUPS CHECKOUTS ALARMSIMPORTANT: Table 5 illustrates the complete hierarchy.Your menu parameters may be different depending onyour configuration.For example if you do not have a DCV (CO2 ) sensor, thennone of the DCV parameters appear and only MIN POSwill display. If you have a CO2 sensor, the DCV MIN andDCV MAX will appear AND if you have 2 speed fanDCV MIN (high and low speed) and DCV MAX (highand low speed will appear).NOTE: Some parameters in the menus use the letters MAor MAT, indicating a mixed air temperature sensorlocation before the cooling coil. This unit application hasthe control sensor located after the cooling coil, in the fansection, where it is designated as (Cooling) Supply AirTemperature or SAT sensor.SETUP AND CONFIGURATIONBefore being placed into service, the W7220 Economizermodule must be setup and configured for the installedsystem.IMPORTANT: During setup, the Economizer module islive at all times.The setup process uses a hierarchical menu structure thatis easy to use. You press the and arrow buttons tomove forward and backward through the menus and pressthe button to select and confirm setup item changes.Time--out and ScreensaverWhen no buttons have been pressed for 10 minutes, theLCD displays a screen saver, which cycles through theStatus items. Each Status items displays in turn and cyclesto the next item after 5 seconds.SUP-- TI24-- 02SI