Y-TG, R-410A ZJ/ZR/ZF Series 15-25 ton, 60 Hertz - Usair-eng.com

251934-YTG-I-1008valve, if applicable, and the temperature limit switch ongas and electric heat units. The unit control board willalarm on ignition failures, compressor lockouts andrepeated limit switch trips.• Nuisance Trip Protection and Strikes - To preventnuisance trouble calls, the control board uses a “threetimes, you’re out” philosophy. The high and lowpressureswitches and the freezestats must trip threetimes within two hours before the unit control board willlock out the associated compressor.• On Board Diagnostics - Each alarm will energize atrouble light on the thermostat, if so equipped, and flashan alarm code on the control board LED. Each high andlow-pressure switch alarm as well as each freezestatalarm has its own flash code. The control board savesthe five most recent alarms in memory, and these alarmscan be reviewed at any time. Alarms and programmedvalues are retained through the loss of power.• Reliable - From the beginning - All units undergocomputer automated testing before they leave the factory.Units are tested for refrigerant charge and pressure, unitamperage, and 100% functionality. For the long term - Allunits are painted with a long lasting, powder paint thatstands up over the life of the unit. The paint used hasbeen proven by a 1000 hour salt spray test.• Full Perimeter Base Rails - The permanently attachedbase rails provide a solid foundation for the entire unit andprotect the unit during shipment. The rails offer riggingholes so that an overhead crane can be used to place theunits on a roof.• Easy Installation - Gas and electric utility knockouts aresupplied in the unit underside as well as the side of theunit. Utility connections can be made quickly and with aminimum amount of field labor. All units are shipped with2" throw-away filters installed.• Wide Range of Indoor Airflows - All supply air blowersare equipped with a belt drive that can be adjusted tomeet the exact requirements of the job. A high static driveoption is available for applications with a higher CFM and/or static pressure requirement.• Warranty - All models include a 1-year limited warrantyon the complete unit. Compressors and electric heaterelements each carry a 5-year warranty. Aluminized steeland stainless steel tubular heat exchangers carry a 10-year warranty.Factory Installed OptionsYORK ® offers several equipment options factory installed, forthe ZJ/ZR/ZF Series.• Single Input Electronic Enthalpy Economizers -Includes a slide-in / plug-in damper assembly with fullymodulating spring-return motor actuator capable ofintroducing up to 100% outdoor air with nominal 1%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.• BAS-Ready Economizer - Includes a slide-in / plug-indamper assembly with fully modulating spring-returnmotor actuator with zero to 95-degree rotation capable ofintroducing up to 100% outdoor air with nominal 1%leakage type dampers.Actuator requires 2-10 VDC input from an external source,such as a field-installed or factory-installed BAScontroller. BAS-ready actuators have an adjustableauxiliary end-switch for optional power exhaust control.For units with optional VAV or Simplicity® Intelli-Comfort control, a factory-installed, dry bulb sensordetermines if outdoor air temperature is low enough toprovide free-cooling operation. (Field-installed humiditysensors for either outdoor air or outdoor & return airstreams are available for single enthalpy and differentialenthalpy configurations, respectively).The rainhood is painted to match the basic unit and mustbe field-assembled before installing.• Power Exhaust - Our economizer options are availablewith power exhaust. Whenever the outdoor air intakedampers are opened for free cooling, the exhaust fan willbe energized to prevent the conditioned space from beingover-pressurized during economizer operation.The exhaust fan, motor and controls are installed andwired at the factory. The rain hood must be assembledand installed in the field.The power exhaust option can only be used on bottomduct configurations.• Motorized Outdoor Air Intake Damper - Includes aslide-in / plug-in damper assembly with a 2- position,spring return motor actuator which opens to a pre-setposition whenever the supply air blower is operating andwill drive fully closed when the blower unit shuts down.The rain hood is painted to match the basic unit and mustbe field assembled before installing.• Barometric Relief Damper - This damper option can beused to relieve internal building air pressure on units withan economizer without power exhaust. This accessoryincludes a rain hood, a bird screen and a fully assembleddamper. With bottom duct connections, the dampershould be mounted over the opening in the return airpanel. With horizontal ductwork, the accessory should bemounted on the return air duct.• Phenolic Coated Evaporator And Condenser Coils -Special coating process that utilizes Technicoat 10-1"processes. Coating is applied by total immersion of thecomplete coil for maximum protection.• Electric Heaters - wired for single point power supply.These nickel chromium heater elements are provided withlimit and automatic reset capability to prevent operation atexcessive temperatures.• Variable Air Volume (VAV) - A factory-installed variablefrequency drive (VFD), mounted in the Blower Accesscompartment, is used to control the speed of the indoorblower motor in order to maintain a constant static6 Johnson Controls Unitary Products