Roof curbs are designed to fit inside the base rails of the unit and include both a wood nailing strip and duct hanger supports.
•POWER EXHAUST - Our single input economizer options are available with power exhaust. Whenever the outdoor air intake dampers are opened for free cooling, the exhaust fan will be energized to prevent the condi- tioned space from being
The power exhaust option can only be used on bot- tom duct configurations.
•BAROMETRIC RELIEF DAMPER - This damper acces- sory can be used to relieve internal building air pressure on units with an economizer without power exhaust. This accessory includes a rain hood, a bird screen and a fully assembled damper. With bottom duct connections, the damper should be mounted over the opening in the
036-21508-005-A-0305
return air panel. With horizontal ductwork, the accessory should be mounted on the return air duct.
•ENTHALPY ACCESSORY CONTROL KIT - This kit contains the required components to convert a single enthalpy economizer to dual enthalpy.
•BURGLAR BARS - Mount in the supply and return openings to prevent entry into the duct work.
•CO2 SENSOR - Senses CO2 levels and automatically overrides the economizer when levels rise above the present limits.
•COIL GUARD - Customers can purchase a coil guard kit to protect the condenser coil from damage. This is not a hail guard kit.
•HAIL GUARD - Hail guard is available to protect the unit from hail damage. This is a sloped hood that fits above the coil.
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