Specifications

7
OPTIONS AND ACCESSORIES (cont)
CONTROLLER
BAROMETRIC
RELIEF DAMPERS
OUTDOOR AIR
TEMPERATURE
SENSOR
GEAR-DRIVEN
DAMPER
ACTUATOR
ECONOMI$ER
PLUG
UNIT MOUNTED DISCONNECT
ECONOMI$ER
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.
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.
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.
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.