York SUNLINE MAGNUM 300 Technical Manual

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York SUNLINE MAGNUM 300 Technical Manual Manual pdf 9 page image

036-21410-001-A-0502Unitary Products Group 9• Electric Heat Operation - All electric heat models (fac-tory installed only) are wired for a single power sourceand include a bank of nickel chromium elementsmounted at the discharge of the supply air blower to pro-vide a high velocity and uniform distribution of air acrossthe heating elements. Every element is fully protectedagainst excessive current and temperature by fuses andtwo thermal limit switches.The power supply wiring can be routed into the controlbox through a threaded pipe connection in the base panof the unit or through a knockout in the wiring panel onthe front of the unit.• BAS Controls - York’s Magnum series units offer factorymounted BAS controls such as Novar, Honeywell,Johnson, and CPC.FACTORY-INSTALLED OPTIONS• SINGLE INPUT ELECTRONIC ENTHALPY ECONO-MIZERS - Includes a slide-in / plug-in damper assemblywith fully modulating spring-return motor actuator capa-ble of introducing up to 100% outdoor air with nominal1% leakage type dampers.The enthalpy system contains one sensor that monitorsthe outdoor air and determines when the air is coolenough and dry enough to provide free cooling.The rainhood is painted to match the basic unit and mustbe field-assembled before installing.Power exhaust is not available as a field installedoption.• POWER EXHAUST - Our single economizer options areavailable with power exhaust. Whenever the outdoor airintake dampers are opened for free cooling, the exhaustfan will be energized to prevent the conditioned spacefrom being over-pressurized during economizer opera-tion.The exhaust fan, motor and controls are installed andwired at the factory. The rain hood and the back-draftdamper need to be assembled and installed in the field.The power exhaust option can only be used on bot-tom duct configurations.• MOTORIZED OUTDOOR AIR INTAKE DAMPER -Includes a slide-in / plug-in damper assembly with a 2-position, spring return motor actuator which opens to apre-set position whenever the supply air blower is oper-ating and will drive fully closed when the blower unitshuts down.The rain hood is painted to match the basic unit andmust be field assembled before installing.• PHENOLIC COATED EVAPORATOR AND CON-DENSER COILS - Special coating process that utilizesTechnicoat 10-1" processes. Coating is applied by totalimmersion of the complete coil for maximum protection.• ELECTRIC HEATERS wired for single point power sup-ply. These nickel chromium heater elements are pro-vided with limit and automatic reset capability to preventoperation at excessive temperatures.FIGURE 1: UNIT CUTAWAY