50EY Single-Package Rooftop Electric Cooling Units With Optional Electric Heat
Quality and reliability: Dual serviceable, semi-hermetic compressors on intertwined evaporator coil ensures excellent full and part load efficiency. Dual refrigerant circuits, both electrically and mechanically independent, provide standby capability should one circuit require service. Reliable Carlyle 06D/E compressors are proven performers.
Variable frequency drive (VFD) and unit unloading: Variable air volume (VAV) units utilize state of the art variable frequency drive (VFD) to control airflow. VAV units have up to 6 steps of unloading for low load operation.
Factory installed economizer (standard): All units come equipped with an integrated economizer which permits cooling utilizing an outdoor air sensor. The direct gear driven, low leakage blades eliminate conventional interblade linkages and the associated adjustments. The economizer operates in conjunction with mechanical cooling when required and is factory installed for either vertical or horizontal operation.
Installation/serviceability: Dedicated horizontal design requires no alteration time to convert in the field. Single point electrical connections are standard on all units. Electrical service access can be made through roof curb or side of unit. High static capability of standard units minimize the need to convert to higher static, oversized motors. The unit is less sensitive to distribution ductwork design. The standard microprocessor controls replace the need for field installed anti-short cycle timers. The controls are compatible with either a room sensor or conventional thermostat with no need to install an accessory interface.