Theory of Operation ................................................ 16Sequence of Operation .............................................. 179. Start-up Procedure ...................................... 18Blower and Phasing Check ........................................... 18Cooling Checks ..................................................... 1910. Operation And Maintenance Instructions ................... 20Turning Off the Unit ................................................ 20Heating ........................................................... 20Cooling ........................................................... 20Starting the Unit After Shutdown ..................................... 20Heating ........................................................... 20Cooling ........................................................... 20Thermostat Fan Switch Operation ..................................... 20Adjusting Room Temperatures ........................................ 20Monthly Maintenance and Inspection Checks ........................... 21Air Filters (Factory Installed) ......................................... 21Disposable Replacement Filters ....................................... 21Cooling Season Checks (Monthly) ..................................... 21Condenser Coil ..................................................... 21Condensate Drain .................................................. 21Annual Maintenance and Inspection ................................... 21Circulating Air Blower .............................................. 2111. Rigging Instructions ..................................... 23