036-21490-002-A-0204
Unitary Products Group
35
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ELECTRONIC ENTHALPY AUTOMATIC
ECONOMIZER - Outdoor and return air dampers that
are interlocked and positioned by a fully-modulating,
spring-return damper actuator. The maximum leakage
rate for the outdoor air intake dampers shall not exceed
2% when dampers are fully closed and operating against
a pressure differential of 0.5 IWG. A unit-mounted
potentiometer shall be provided to adjust the outdoor
and return air damper assembly to take in CFM of
outdoor air to meet the minimum ventilation requirement
of the conditioned space during normal operation. During
economizer operation, a mixed-air temperature control
shall modulate the outdoor and return air damper
assembly to prevent the supply air temperature from
dropping below 55°F. Changeover from compressor to
economizer operation shall be provided by an integral
electronic enthalpy control that feeds input into the basic
module. The outdoor intake opening shall be covered
with a rain hood that matches the exterior of the unit.
Water eliminator/filters shall be provided. Simultaneous
economizer/compressor operation is also possible.
Dampers shall fully close on power loss.
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MOTORIZED OUTDOOR AIR DAMPERS - Outdoor and
return air dampers that are interlocked and positioned by
a 2-position, spring-return damper actuator. The maxi-
mum leakage rate for the outdoor air intake dampers
shall not exceed 2% when dampers are fully closed and
operating against a pressure differential of 0.5 IWG. A
unit-mounted potentiometer shall be provided to adjust
the outdoor and return air damper assembly to take in
the design CFM of outdoor air to meet the ventilation
requirements of the conditioned space during normal
operation. Whenever the indoor fan motor is energized,
the dampers open up to one of two pre-selected posi-
tions - regardless of the outdoor air enthalpy. Dampers
return to the fully closed position when the indoor fan
motor is de-energized. Dampers shall fully close on
power loss.
OTHER PRE-ENGINEERED ACCESSORIES AVAILABLE
•
ROOF CURB - 14" high, full perimeter curb with wood
nailer (shipped knocked-down).
•
100% BAROMETRIC RELIEF DAMPER - Contains a
rain hood, air inlet screen, exhaust damper and mount-
ing hardware. Used to relieve internal air pressure
through the unit.
•
BURGLAR BARS - Designed to work with above roof
curbs, depending on unit model. Fits duct openings of
curb supply and return air openings.
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SIDE DUCT FLANGE - Supply and return air duct
flanges for side duct applications. Do not use on units
with power exhaust.
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HIGH SPEED DRIVE - Includes blower pulley and belt
for higher CFM and/or static pressure requirements.
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WOOD SKID - Allows unit to be handled with 90" forks.
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COIL GUARD KIT - Guard for cooling coil.
OTHER FACTORY INSTALLED OPTIONS
•
POWER EXHAUST OPTION - To work in conjunction
with economizers.
•
TECHNICOAT PHENOLIC COATED CONDENSER
AND EVAPORATOR COIL
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ELECTRONIC SINGLE ENTHALPY ECONOMIZER
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DIRTY FILTER SWITCH
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PHASE MONITOR
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COIL GUARD
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POWERED GFI CONVENIENCE OUTLET
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NON-POWERED GFI CONVENIENCE OUTLET
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BAS CONTROLS (CPC, JOHNSON, HONEYWELL,
NOVAR)
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BAS READY ECONOMIZER (BELIMO ACTUATOR
WITHOUT A CONTROLLER)
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HINGED FILTER DOOR ACCESS AND TOOLESS
ACCESS PANELS
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HIGH SPEED DRIVE
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2" THROW AWAY FILTERS
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4" PLEATED FILTERS
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DISCONNECT SWITCH
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SUPPLY AIR SMOKE DETECTOR
•
RETURN AIR SMOKE DETECTOR
