Manual 2100-498BPage 2 of 17CONTENTSGeneralGeneral Information ................................................. 3Unpacking ................................................................ 3Description ............................................................... 3Models ................................................................ 3InstallationBasic Installation .......................................... 4, 5, 7, 8Economizer Sequence of OperationCondition A – Cool Outdoors ................................. 16Economizer Sequence of OperationCondition B – Warm Outdoors ............................... 17FiguresFigure 1 Removal of Exterior Panels .................... 4Figure 2 Installation of Economizer ....................... 5Figure 3 Install Loose Piece Wire Harness ........... 6Figure 4 WGSEIFM-5 Wiring Diagram .................. 7Figure 5 Economizer Logic Module ....................... 9Figure 6 Economizer Op - Single Compressor .... 15Figure 7 Call for Blower Operation ...................... 16Figure 8 Call for Cooling Operation ..................... 17TablesTable 1 ................................................................ 3Table 2 ................................................................ 8GraphsWG3S Ventilation Airflow ....................................... 10WG4S Ventilation Airflow ....................................... 10WG5S Ventilation Airflow ........................................ 11W24G EIFM Ventilation Airflow ............................. 12W30G-W36G EIFM Ventilation Airflow .................. 13W42G-W60G EIFM Ventilation Airflow .................. 14Manufactured under U.S. Patent number 5,301,744Other patents pendingCOPYRIGHT DECEMBER 2007BARD MANUFACTURING COMPANY, INC.BRYAN, OHIO USA 43506