Carrier WeatherMaker 48TC 06 Installation Instructions Manual

Contents

26NOTE: Some parameters in the menus use the letters MA orMAT, indicating a mixed air temperature sensor locationbefore the cooling coil. This unit application has the controlsensor located after the cooling coil, in the fan section, where itis designated as (Cooling) Supply Air Temperature or SATsensor.Setup and Configuration — Before being placed into service,the W7220 Economizer module must be setup and configuredfor the installed system.The setup process uses a hierarchical menu structure that iseasy to use. Press the and arrow buttons to move forward andbackward through the menus and press the button to select andconfirm setup item changes.See Table 14 for damper minimum position settings andreadings on the checkout menus.Time-Out and Screen-Saver — When no buttons have beenpressed for 10 minutes, the LCD displays a screen saver, whichcycles through the Status items. Each Status items displays inturn and cycles to the next item after 5 seconds.1 and 2 Speed Fan Operation — For 1 speed fan dry bulb andenthalpy operation see Tables 15-18. For 2 speed fan operationsee Tables 19-22.IMPORTANT: Table 13 illustrates the complete hierar-chy. Your menu parameters may be different dependingon your configuration.For example if you do not have a DCV (CO2) sensor,then none of the DCV parameters appear and only MINPOS will display. If you have a CO2 sensor, the DCV MINand DCV MAX will appear AND if you have 2 speed fanDCV MIN (high and low speed) and DCV MAX (highand low speed) will appear.IMPORTANT: During setup, the Economizer module islive at all times.