1WARNING: READ SAFE OPERATION RULES AND MANUAL CAREFULLYINSTALLATION OPERATION and MAINTENANCE MANUALHigh Efficiency Packaged Model TRS Series Air ConditioningSystems, Model Sizes 036 Thru 420--- The TRS Series uses R- 410A Refrigerant –TABLE OF CONTENTSSafety Labeling and Signal Words...........2General Description ..................................3Unpacking, Inspection ........................3Design Certification..............................3Codes & Ordinances ............................3Installation..............................................3- 7Unit Location, Clearances ...................3Curb Installation ...................................4Rigging...................................................4Electrical .............................................4-5Ductwork ...............................................5Condensate Piping ...............................5Gas Piping and Venting .......................5Service Clearances ……………………6-7Cooling System Options ...........................7Hot Gas Bypass .................................7-8Head Pressure Control.........................8Variable Speed Control ........................8Adjustable High and Low Pressure ....8Mechanical Adjustments ....................8- 10Evaporator Blower Fan ..................8- 10Electrical System Options .................10-11Air Flow Switch...................................10Clogged Filter Indicator ..........................10Convenience Outlet .......................10-11Exhaust Fan Interlock ........................11Power Through the Curb ...................11Firestat.................................................11Sure-TripTM ..........................................11Unit Controller.....................................11Sequence of Operation ..........................11Hydronic and Steam Heat……………..11Electric Heat ........................................11Gas Heat ..............................................11Gas Furnace…………………………….12-20ECW Wheel………………………………21-22Trouble Shooting Guides...................23-28General Refrigeration Circuit .......23-25Varispeed™ Condenser Control .......25Hot Gas Bypass Regulator ................26General Gas Furnace ....................27-28Maxitrol-Regulator.........................27-28!