York PREDATORTM MAGNUM DJ 150 Technical Manual

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Contents

036-21484-001-B-0103Unitary Products 27the design CFM of outdoor air to meet the ventilationrequirements of the conditioned space during normaloperation. Whenever the indoor fan motor is energized,the dampers open up to one of two pre-selected posi-tions – regardless of the outdoor air enthalpy. Dampersreturn to the fully closed position when the indoor fanmotor is de-energized. Dampers shall fully close onpower loss.ADDITONAL FACTORY INSTALLED OPTIONSALTERNATE INDOOR BLOWER MOTOR – For applicationswith high restrictions, units are available with optional indoorblower motors that provide higher static output and/or higherairflow.CONVENIENCE OUTLET – Unit can be provided with anoptional 120VAC GFCI outlet with cover on the corner of theunit housing the compressors.DIRTY FILTER SWITCH – This kit includes a differentialpressure switch that energizes the fault light on the unit ther-mostat, indicating that there is an abnormally high-pressuredrop across the filters.BREAKER– A HACR breaker can be factory installed on thegas heat unit.DISCONNECT SWITCH- A disconnect can be factoryinstalled on a cooling only unit.STAINLESS STEEL HEAT EXCHANGER – For applicationsin a corrosive environment, this option provides a full stain-less steel heat exchanger assembly.SMOKE DETECTOR – A smoke detector can be factorymounted and wired in the supply and/or return air compart-ments.OTHER PRE-ENGINEERED ACCESSORIES AVAIL-ABLEROOF CURB - 14” and 8” high, full perimeter knockdowncurb, with hinged design for quick assembly.BAROMETRIC RELIEF DAMPER – (Unit mounted – Down-flow, Ducted Mounted – Sideflow) – Contains a rain hood, airinlet screen, exhaust damper and mounting hardware. Usedto relieve internal air pressure through the unit during econo-mizer operation.PROPANE CONVERSION KIT – Contains new orifices andgas valve springs to convert from natural to L.P. gas.–60 °F GAS HEAT KIT – Provides an electric heat kit for thegas compartment for use in extreme low ambient conditions.ECONOMIZER (Downflow and Sideflow)POWER EXHAUST – (Unit mount – Downflow, Duct mount –Sideflow)

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