The Reznor’s Reznor’s Model YDSA Packaged DX Space Conditioning Units
Model YDSA space condition provides high efficiency to all aspects of the space temperature control application. The Dx system maximizes efficiency with the use of digital scroll technology, ECM condenser supply fans and optimized coil designs. The Dx system exceeds ASHRAE standard 90.1 requirements. The unit’s blower system incorporates superior energy efficient blower design with variable speed control to deliver the airflow that the application requires. YDSA utilizes the Tcore³® condensing gas heat technology. The gas heating system maintains greater than 90% efficiency throughout the modulated or staged control range delivering complete savings. The system features state of the art stand alone control system further maximizes energy use while maintaining space temperature condition.

Unit Features :
Supply & Exhaust Fan:
● 3,500 – 11,550 SCFM
● Direct drive backward incline plenum fan
● High external static pressure capability
● Easy CFM verification for all fans
● Factory installed ABB variable frequency drive
» Duct static pressure control
» Summer/winter constant volume
» External 0-10V signal
» Automatic low and high speed control
◊ Options:
– Integrated energy recovery (total enthalpy wheel)
– ECM power exhaust (Std 62.1 compliant)
– Dirty filter status

Mechanical Cooling:
● R410A refrigerant (environmentally friendly)
● High efficiency digital scroll technology
● 10-100% capacity control
● Fully interlaced coils
● High efficiency ECM condenser fans
● Compressor anti-cycle programming
● Mechanical gauge connections
● High & low pressure switches
● Crankcase heaters
● Anti-rust, dual sloped condensate drain pan
● Froststat, all circuits
◊ Options:
– low ambient control 35°F (1.7°C)
– Hot gas by-pass
– Electrofin coil coatings
– 5 year compressor warranty
– Compressor sound blanket
– Hail guards

Electric Heat:
● High capacity heat for colder climates
● 3-4 stage control
● Failure/alarm diagnostics
◊ Options:
– SCR control 0-100% modulation

Intake (Options):
● 100% return (horizontal or vertical
● Mixed air control
● Economizer control with CO2 demand ventilation
● User adjustable 2 position damper control
● Manual damper positioning external 0-10V signal
● Outside air hood

Gas Heating:
● Natural gas or propane furnace
● Patented Tcore³ combustion control (patent # 8,113,269)
● High capacity heat for colder climates
● Minimum 80% thermal efficiency
● 2-4 stage control
● 409 stainless steel heat exchanger
● Failure/alarm diagnostics
◊ Options:
– 90% high efficiency heating
– 5:1 modulated temperature control
– 10:1 modulated temperature control
– Flue gas extension kit
– Condensate pumps
– Condensate neutralizers

Construction:
● Double wall foam panel construction – R13
● Hinged access doors with slam latches
● G90 galvanized steel substrate, 60 gloss finish
● Convenient single door access panel for all controls, heat and cooling sections
● 4 point bottom lifting
● 4” pleated MERV 8 filters
● Vertical discharge, roof or pad mounting
● Full perimeter curbs
» 16” curb with vertical discharge
» 36” curb with horizontal discharge
◊ Options:
– 4” pleated MERV 13 filters
– 2 year all parts warranty