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Thermal insulation contains an EPA-registered immobilized
anti-microbial agent to inhibit the growth of bacteria and fungi.
The pitched, non-corroding drain pan can be adjusted for a
right- or left-hand connection to suit many applications and
provide positive drainage and to prevent standing condensate.
The 524A accessory economizer can provide ventilation air to
improve indoor air quality by using demand control ventilation.
When used in conjunction with a 2 to 10 VDC adapter on the
actuator and a CO
2
sensor, the economizer admits fresh
outdoor air to replace stale, recirculated indoor air as needed.
Economy — The 524A Series packaged air handlers have low
initial costs, and they continue to save money by providing
reduced installation expense and energy-efficient performance.
Quick installation is ensured by the multipoise design. Units can
be installed in either the horizontal or vertical configuration with-
out modifications. Fan motors and contactors are prewired and
thermostatic expansion valves (TXVs) are factory-installed on
all 524A direct-expansion models.
High efficiency, precision-balanced fans minimize air turbu-
lence, surging, and unbalanced operation, cutting operation
expenses.
The economizer accessory precisely controls the blend of out-
door air and room air to achieve comfort levels. When the
outside air enthalpy is suitable, outside air dampers can fully
open to provide “free” cooling without energizing mechanical
cooling.
Rugged Dependability — The 524A series units are made to
last. The die-formed galvanized steel panels ensure structural
integrity under all operating conditions. Galvanized steel fan
housings are securely mounted to a die-formed galvanized
steel fan deck.
Rugged pillow-block bearings (524A150-300) are securely fas-
tened to the solid steel fan shaft with split collets and clamp
locking devices. Smaller unit sizes have spider-type bearings.
Coil Flexibility — Model 524A direct-expansion coils have gal-
vanized steel casings; inlet and outlet connections are on the
same end. The coils are designed for use with Refrigerant 22
and have
3
/
8
-in. diameter copper tubes mechanically bonded to
aluminum sine-wave fins. The coils include matched, factory-
installed thermostatic expansion valves (TXVs) with matching
distributor nozzles.
Easier Installation and Service — Themultipoisedesignand
component layout help you to get the unit installed and running
quickly. Units can be converted from horizontal to vertical oper-
ation by simply repositioning the unit. Drain pan connections
are duplicated on both sides of the unit. The filters, motor, drive,
TXVs, and coil connections are all easily accessed by removing
a single side panel.
TABLE OF CONTENTS
Page
Features/Benefits.............................................1,2
ARICapacityRatings............................................3
OptionsandAccessories .......................................4-6
SelectionProcedure.............................................7
Controls.......................................................8
TypicalWiringSchematics .....................................9,10
569D072-120, 576C120, 569F120
ModelNumberNomenclature.....................................11
PhysicalData .................................................12
Dimensions................................................13,14
PerformanceData...........................................15-25
ElectricalData.................................................26
ApplicationData...............................................27
TypicalPipingandWiring........................................28
GuideSpecifications.........................................29-32
566D/E150-240
ModelNumberNomenclature.....................................33
PhysicalData ..............................................34,35
Dimensions................................................36-38
PerformanceData...........................................39-52
ElectricalData.................................................53
ApplicationData............................................54-56
TypicalPipingandWiring.....................................57,58
GuideSpecifications.........................................59,60
524A072-300
ModelNumberNomenclature.....................................61
PhysicalData .................................................62
Dimensions................................................63-65
PerformanceData...........................................66-71
ElectricalData..............................................72-78
ApplicationData............................................79-81
GuideSpecifications.........................................82,83