York DY 048 Technical Manual

Also see for DY 036: Technical guide

York DY 048 Technical Manual Manual pdf 7 page image

343615-YTG-B-0308Johnson Controls Unitary Products 7• STAINLESS STEEL HEAT EXCHANGER - For applica-tions in corrosive environments, this option provides afull stainless steel heat exchanger assembly.• STAINLESS STEEL DRAIN PAN - An optional rust-proof stainless steel drain pan is available to provideyears of trouble-free operation in corrosive environ-ments.• BOTTOM DRAIN CONNECTION - An optional bottomdrain connection is available for inside the curb connec-tions for applications in cold environments to reducefreezing drain lines.• PHASE MONITORS - Designed to prevent unit damage.The phase monitor will shut the unit down in an out-of-phase condition.• DIRTY FILTER SWITCH - This kit includes a differentialpressure switch that energizes the fault light on the unitthermostat, indicating that there is an abnormally highpressure drop across the filters. Factory installed optionor field installed accessory.• HINGED FILTER DOOR/“TOOLLESS” BLOWER ANDACCESS PANELS (not hinged) - This option allows foreasy access and maintenance.NOTE:Knobs are shipped inside the unit to prevent ship-ping damage. These must be field installed fortool-less operation.FIELD-INSTALLED ACCESSORIES• 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.• MOTORIZED OUTDOOR AIR INTAKE DAMPER -Includes a slide-in / plug-in damper assembly with a 2-position, spring return motor actuator which opens tosome pre-set position whenever the supply air blower isoperating 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.• 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.• ROOF CURBS - Eight and fourteen-inch high roof curbsprovide a water-tight seal between the unit and the finishedroof. These full perimeter curbs meet the requirements ofthe National Roofing Contractors Association (NRCA) andare shipped knocked-down for field assembly.Roof curbs are designed to fit inside the base rails of theunit and include both a wood nailing strip and ducthanger supports.• HIGH ALTITUDE NATURAL GAS - Burner orifices andpilot orifices are provided for proper furnace operation ataltitudes up to 6,000 feet.• PROPANE - Burner orifices, pilot orifices and gas valveparts are provided to convert a natural gas furnace topropane.• HIGH ALTITUDE PROPANE - Burner orifices and pilotorifices are provided for proper furnace operation at alti-tudes up to 6,000 feet. This accessory supplements thebasic propane conversion kit.• LOW NOX KIT - Required to reduce the emission ofnitrogen oxides below 40 nano grams per joule.• POWER EXHAUST - Our single input economizeroptions are available with power exhaust. Whenever theoutdoor air intake dampers are opened for free cooling,the exhaust fan will be energized to prevent the condi-tioned space from being over-pressurized during econo-mizer operation.The power exhaust option can only be used on bot-tom duct configurations.• BAROMETRIC RELIEF DAMPER - This damper acces-sory can be used to relieve internal building air pressureon units with an economizer without power exhaust. Thisaccessory includes a rain hood, a bird screen and a fullyassembled damper. With bottom duct connections, thedamper should be mounted over the opening in thereturn air panel. With horizontal ductwork, the accessoryshould be mounted on the return air duct.Factory installed Smoke Detectors in the ReturnAir, may be subjected to freezing temperaturesduring "off" times due to Out Side Air infiltration.These Smoke Detectors have an operational limitof 32°F to 131°F. Smoke Detectors installed inareas that could be out side those limitations willhave to be moved to prevent having false alarms.