628767-YTG-C-0910
expansion valves and solenoid valves. Field modifications
are not required for part load operations. Capacity reduction
not only provides economical operation, but also maintains
stable temperature and humidity levels in the conditioned
space.
Air Handling Unit Features and Benefits
Features
These air handlers can be arranged for a variety of air
discharge patterns in either the horizontal or vertical position.
Refer to the unit installation instructions for other application
possibilities.
BAS Control: York Commercial Comfort System (YCCS)
provides split system integration for YCCS single zone,
change-over bypass and VAV systems.
Benefits
Air handling units are designed with two distinct modules to
provide maximum application flexibility. ND360 and 480
Models are shipped as single packages with the blower
module mounted on top of the coil module. The ND600
Blower Section and the M1CZ600 Evaporator Section are
shipped separately and must be assembled on the job site.
All blower modules can be repositioned in the field to meet a
large number of vertical and horizontal applications.
Easy Service: Serviceable expansion valves are provided on
every unit. These valves are factory-installed to provide many
years of trouble-free operation. If service is required, it is not
necessary to unbraze any joints. The expansion valves also
include a tee fitting to allow easy installation of hot gas
bypass if required.
Coil Protection: The indoor coils of these air handlers can be
factory Technicoated to provide extended life to the indoor
coil in standard applications and additional corrosion
protection on those applications in sea coast or corrosive
environments.
The blower module includes the blower wheels and room for
a field-mounted motor and drive. All models offer multiple
motor horsepower and drive options to meet both standard
and high static airflow requirements. The coil module
includes direct expansion coils, 2 in. throwaway filters, liquid
line solenoid valves for capacity reduction, thermal expansion
valves, distributors and a condensate drain pan.
Blower Motors: Different HP motors are available for each
unit to meet almost any air delivery requirement. 5 HP motors
are inherently protected. 7.5 thru 15 HP motors require motor
overload protection.
Every air handling coil is pressurized with air and leak tested
under water. After the headers are brazed onto the coil and
the coil is installed in the unit, the coil is pressurized with
nitrogen for pressure testing and additional leak testing. After
the coil is evacuated and dehydrated, it is pressurized with a
holding charge of nitrogen for storage and/or shipping.
NOTE: Power wiring for blower motor is field supplied on all
Unit Models.
Accessories
Base Sections (30 and 40 ton): Base sections can be used to
elevate units above the floor. If desired, a moderate
percentage of outdoor air may be introduced through these
sections by cutting an access opening to accommodate the
outdoor air duct connection. These bases include a durable
finish to match the evaporator blower unit. The base may
have to be insulated for certain applications.
These air handlers, combined with condensing units, provide
years of quiet, efficient and dependable operation. These
units are manufactured under ISO 9001 Quality System
Certification.
Unit Installation
Units may be bottom-supported or ceiling-suspended and
can be arranged to meet almost any space or duct
requirements. Each unit is available with a choice of blower
motor horsepower, drive packages and other accessories to
make them suitable for most applications.
Hot Water Coils: Drainable water coils are available for field
installation between the blower and the coil modules of both
horizontal and vertical units. Since their casings match the
dimensions and the finish of the basic units, they become an
integral part of the unit after installation. The coils slide out of
their casings for easy installation. Hot water coils have
copper tubes that have been mechanically expanded into
aluminum fins. Both headers are located on the same end of
the coil. Coils are leak-tested at 325 psig under water and
dried before their connections are capped for storage and
shipping.
Blower Motors: Different HP motors are available for each
unit to meet almost any air delivery requirement. All motors
are UL approved, have permanently lubricated ball bearings
and are field-mounted within the insulated cabinet of the units
to minimize the transmission of sound to the surrounding
space.
Steam Coils (30 ton only): Steam coils are available for
installation between the blower and coil modules of both
horizontal and vertical units. Since the casing matches the
dimensions and the finish of the basic unit, it becomes an
integral part of the unit after installation. The coil slides out of
the casings for easy installation and is pitched in the casings
to facilitate condensate drainage. The coil has copper tubes
that have been mechanically expanded into aluminum fins.
Both headers are located on the same end of the coil. The
coil is leak-tested at 325 psig and dried before the
Air Handling units are available in four pipe configurations
from 30 to 50 tons. The dual circuit options provide a wide
variety of application and unit matchup possibilities.
Starters and Heater Elements : These blower motors do not
have inherent protection and require external motor overload
protection. See details in Overload Elements Table.
NOTE: Power wiring for blower motors is field supplied.
Factory-Mounted Components
Part Load Operation: These air handlers have multiple DX
(Direct Expansion) coils with pre-piped distributors,
connections are capped for storage and shipping.
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Johnson Controls Unitary Products
