Features

All units are self-contained and assembled on full perimeter base rails with forklift holes on three sides and holes for over- head rigging. Every unit is completely piped, wired, charged and tested at the factory to simplify the field installation and to provide years of dependable operation.

All models (including those with an economizer) are suitable for either bottom or horizontal duct connections. For bottom duct, remove the sheet metal panels from the supply and return air openings through the base of the unit. For horizontal duct, remove the supply and return air panels on the rear of the unit.

All models are available with the “factory mounted” outdoor air damper option:

•Single enthalpy economizer

Supply air blowers are equipped with either a direct drive or a belt drive that can be adjusted to meet the exact require- ments of the job.

All compressors are equipped with internal pressure relief. Every refrigerant circuit includes a liquid line filter-drier, a high pressure switch and a suction line with a freezestat and low pressure/loss of charge switch to protect all system compo- nents.

•Control boards have standardized a number of features previously available only as options or by utilizing addi- tional controls.

•Low Ambient - An integrated low-ambient control allows all units to operate in the cooling mode down to 0ºF outdoor ambient without additional assis- tance. Optionally, the control board can be pro- grammed to lockout the compressors when the outdoor air temperature is low or when free cooling is available.

•Anti-Short Cycle Protection - To aid compressor life, an anti-short cycle delay is incorporated into the standard controls. Compressor reliability is further ensured by programmable minimum run times. For testing, the anti short cycle delay can be temporarily overridden with the push of a button.

•Fan Delays - Fan on and fan off delays are fully pro- grammable and are independent of one another. All units are programmed with default values based upon their configuration of cooling and heat.

•Safety Monitoring - The control board monitors the high and low-pressure switches, the freezestats, the gas valve, if applicable, and the temperature limit switch on gas heat units. The unit control board will

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alarm on ignition failures, compressor lockouts and repeated limit switch trips.

•Nuisance Trip Protection- To prevent nuisance trouble calls, the control board uses a “three strikes, you’re out” philosophy. The high and low-pressure switches and the freezestats must trip three times within two hours before the unit control board will lock out the compressor.

•On Board Diagnostics - Each alarm will energize a trouble light on the thermostat, if so equipped, and flash an alarm code on the control board LED. Each high and low-pressure switch alarm as well as each freezestat alarm has its own flash code. The control board saves the five most recent alarms in memory, and these alarms can be reviewed at any time. Alarms and programmed values are retained through the loss of power.

All units have long lasting powder paint cabinets with 1000 hour salt spray test approval under ASTM-B117 procedures.

All models are CSA listed.

•Warranty - All models include a one-year limited parts warranty on the complete unit. Compressors and electric heater elements carry a five-year warranty. Gas heat exchangers carry a 10-year parts warranty.

•Gas Heat Operation - All single phase models with gas heat have minimum annual fuel utilization efficiency (AFUE) of 80%. All three phase models with gas heat have minimum steady state efficiency of 80%. Each sec- tion includes a durable heat exchanger with aluminized steel, a redundant gas valve, spark ignition, power vent- ing, an ignition module for 100% shut-off and all of the safety controls required to meet the latest ANSI stan- dards.

The gas supply piping can be routed into the heating compartment through a hole in the base pan of the unit or through a knockout in the piping panel on the front of the unit.

•Electric Heat Operation - All electric heat models are wired for a single power source and include a bank of nickel chromium elements mounted at the discharge of the supply air blower to provide a high velocity and uni- form distribution of air across the heating elements. Every element is fully protected against excessive tem- perature by thermal limit switches.

The power supply wiring can be routed into the control box through a threaded pipe connection (field supplied) in the base pan of the unit or through a knockout in the wiring panel on the side of the unit.

4	Unitary Products Group

48, 60, 36 specifications

York 36, 48, and 60 are three distinct models from the York line of heating, ventilation, and air conditioning (HVAC) systems, specifically designed to meet various commercial and residential needs. Each model fits specific sizing and efficiency requirements while employing advanced technologies to enhance performance.

The York 36 model is ideal for smaller spaces or residential applications. This unit boasts a compact design that integrates seamlessly into tight locations while offering substantial energy efficiency. With a cooling capacity of approximately 36,000 BTU, it’s suitable for apartments or small commercial areas. The use of scroll compressors in this model contributes to reliable operation and quieter performance. Additionally, it utilizes environmentally friendly refrigerants that comply with modern environmental regulations, making it a sustainable choice.

The York 48 model steps up its capabilities for larger residential and commercial buildings. It provides ample cooling capacity at around 48,000 BTU, accommodating medium-sized spaces effectively. One of the standout features is its two-stage cooling technology, which allows for consistent temperature control without excessive energy consumption. This model is equipped with variable speed blowers that optimize airflow, ensuring a comfortable indoor environment even during peak summer months. The York 48 is also engineered with advanced diagnostics, allowing technicians to identify and resolve issues quickly, further enhancing reliability.

Finally, the York 60 model caters to extensive commercial applications with its impressive cooling capacity of approximately 60,000 BTU. This unit excels in large offices, retail spaces, and industrial settings. It employs advanced inverter technology, which adjusts compressor speed based on demand, leading to remarkable energy efficiency and significant cost savings in long-term operation. The York 60 also features robust insulation and weather-tight cabinet design to minimize energy loss. Additionally, its user-friendly interface allows for easy control and monitoring, ensuring optimal performance.

All three York models come equipped with state-of-the-art filters and air purifiers, improving indoor air quality by effectively reducing allergens and pollutants. With a focus on durability, energy efficiency, and advanced technology, York 36, 48, and 60 units represent versatile solutions for their respective applications, demonstrating York's commitment to innovation and sustainability in HVAC systems. Whether for a small apartment or a large commercial space, these units offer reliable comfort and performance tailored to specific needs.