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0 TRWE" <br /> Mechanical Specifications <br /> Filters <br /> Throwaway filters shall be standard on all units.Optional 2-inch MERV 8 and MERV 13 filters shall <br /> also be available. <br /> High Pressure Control <br /> All units include High Pressure Cutout as standard. <br /> Indoor Fan <br /> 3-5 ton units are belt driven, FC centrifugal fans with adjustable motor sheaves.All 6-71h ton units <br /> (standard efficiency)shall have belt drive motors with an adjustable idler-arm assembly for quick- <br /> adjustment to fan belts and motor sheaves.All 10 tons have variable speed direct drive motors.All <br /> motors shall be thermally protected.All indoor fan motors meet the U.S.Energy PolicyAct of 1992 <br /> (E PACT). <br /> Outdoor Fans <br /> The outdoor fan shall be direct-drive,statically balanced,draw-through in the vertical discharge <br /> position.The fan motor shall be permanently lubricated and shall have built-in thermal overload <br /> protection. <br /> Phase Monitoring Protection <br /> PrecedentT"' unitswith 3-phase powerare equipped with phase monitoring protection asstandard. <br /> These devices protect motors and compressors against problems caused by phase loss, phase <br /> imbalance and phase reversal indication. <br /> Plenum Fan <br /> The following unit shall be equipped with a direct drive plenum fan design(WSC120E).Plenum fan <br /> design shall include a backward-curved fan wheel along with an external rotor direct drive variable <br /> speed indoor motor.All plenum fan designs will have a variable speed adjustment potentiometer <br /> located in the control box. <br /> Refrigerant Circuits <br /> Each refrigerant circuit offer thermal expansion valve as standard. Service pressure ports, and <br /> refrigerant line filter driers are factory-installed as standard.An area shall be provided for <br /> replacement suction line driers. <br /> Unit Top <br /> The top cover shall be one piece construction orwhere seams exist,it shall be double-hemmed and <br /> gasket-sealed.The ribbed top adds extra strength and prevents water from pooling on unit top. <br /> Factory Installed Options <br /> Black Epoxy Pre-Coated Coils <br /> The black epoxy coils have a thermoset vinyl coating that is bonded to the aluminum fin stock prior <br /> to the fin-stamping process.The pre-coated coils are an economical option for protection in mildly <br /> corrosive environments. <br /> CO2 Sensor Wiring <br /> Factory-installed CO2 sensor wiring saves time and ensures proper unit connections for the field <br /> installed CO2 sensor kits. <br /> Condensate Overflow Switch <br /> This option shall shut the unit down in the event that a clogged condensate drain line prevents <br /> proper condensate removal from the unit. <br /> PKGP-PRC013K-EN 81 <br />