3
Table of Contents
Safety .............................................................................................................................................. 9
RQ Series Feature String Nomenclature ....................................................................................... 14
General Information ...................................................................................................................... 23
Codes and Ordinances............................................................................................................... 23
Receiving Unit .......................................................................................................................... 24
Packaged Direct Expansion (DX) Units ................................................................................... 25
Gas or Electric Heating ............................................................................................................. 26
Wiring Diagrams ....................................................................................................................... 27
Condensate Drain Pan ............................................................................................................... 27
Installation..................................................................................................................................... 28
Unit Location ............................................................................................................................ 28
Setting the Curb ........................................................................................................................ 28
Forklifting the Unit ................................................................................................................... 31
Lifting the Unit ......................................................................................................................... 32
Vertical Duct Connection ......................................................................................................... 34
Seismic Curb Installation .......................................................................................................... 35
Horizontal Duct Connection ..................................................................................................... 37
Outside Air Rain Hood ............................................................................................................. 37
Metal Mesh Filters .................................................................................................................... 38
Electrical ................................................................................................................................... 39
Thermostat Control Wiring ................................................................................................... 41
Gas Heating ............................................................................................................................... 41
Maximum Piping Capacities ................................................................................................. 42
Piping Sizing Examples ........................................................................................................ 42
Inlet and Manifold Pressures ................................................................................................ 43
Gas Pressure Regulator & Overpressure Protection Device ................................................. 43
Additional Gas Piping Considerations .................................................................................. 44
Leak Testing.......................................................................................................................... 45
Refrigerant-to-Water Heat Exchanger ...................................................................................... 45
Open Loop Applications ....................................................................................................... 45
Freezing Water in the Heat Exchanger ................................................................................. 46
Water Piping ......................................................................................................................... 47
Condensate Drain Piping .......................................................................................................... 49
