OPTIONS AND ACCESSORIES (cont)
UNIT MOUNTED DISCONNECT
Factory-installed, internally-mounted, NEC (National Electrical Code) and UL (Underwriters’ Laboratories) approved non-fused switch provides unit power shutoff with disconnect lockout protection capability. The switch is accessible from outside the unit.
CONVENIENCE OUTLET
Factory-installed, internally mounted and externally accessible 115-v female receptacle. Includes 15-amp GFI (Ground Fault Interrupter) receptacle with independent fuse protection. Voltage required to operate convenience outlet is provided by a factory-installed transformer.
ECONOMI$ER
ECONOMI$ER | CONTROLLER | GEAR-DRIVEN |
PLUG | | DAMPER |
ACTUATOR | | |
OUTDOOR AIR 
TEMPERATURE
SENSOR
BAROMETRIC
RELIEF DAMPERS
Factory-installed EconoMi$er utilizes a microprocessor-based con- trol, gear drive damper system, low pressure drop characteristics, built-in spring return (for close upon power loss), and an integral barometric damper.
NOTE: EconoMi$er is only available for vertical ductwork applica- tions and can be field or factory installed.
DURABLADE ECONOMIZER
Exclusive Durablade economizer damper design saves energy while providing economical and reliable cooling. A sliding plate on the face of the economizer controls the amount of outdoor air entering the system. When the sliding plate is closed, it provides a leakproof seal which prevents ambient air from seeping in or conditioned air from seeping out. It can be easily adjusted for 100% outdoor air or any proportions of mixed air. Equipped with standard controls and 30% barometric relief capabilities.
PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE
The Perfect Humidity dehumidification package is a factory-installed option that provides increased dehumidification by cooling the hot liquid refrigerant leaving the condenser coil. The package consists of a subcooling coil located on the leaving-air side of the evaporator coil. The location of this coil in the indoor-air stream enhances the latent capacity of the 581B units by as much as 40%. The Perfect Humidity package includes crankcase heater(s) and low-pressure switch(es) and operation can be controlled by a field-installed, wall-mounted humidistat or light commercial thermidistat.
