York NC090-300, Technical Manual

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505428-YTG-V-0417
6 Johnson Controls Unitary Products
factory installed. NC300 models Overload Relays are field
installed. Power wiring for blower motor is supplied in the
Overload Relay Kit. See details in Overload Relay Kit and
Overload Relay Setting Tables on Page 70.
Factory-Mounted Components
Part Load Operation: These air handlers with DX (Direct
Expansion) coils rated at 10 tons of capacity and above have
multiple coils with pre-piped distributors, 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.
BAS Control: Smart Equipment™ with Communication
Option Control - The York® Smart Equipment™ with
Communication Option Control is factory installed. It includes
all the features of the Smart Equipment™ control with an
additional gateway to BACnet MS/TP (programmable to
Modbus or N2 protocols).
IntelliSpeed™ Supply Fan Control Option: (ASHRAE 90.1
Compliant) AHU units configured with the IntelliSpeed option
will contain a VFD for multi-speed supply fan operation. This
option allows the supply fan RPM to vary based on the
number compressors or heating stages energized.
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
have factory applied Technicoat or Electrofin coating to
provide extended life to the indoor coil in standard
applications and additional corrosion protection on those
applications in sea coast or corrosive environments.
Accessories
IntelliSpeed™ VFD: Field installed VFD for 25 ton AHU
IntelliSpeed multi-speed fan function. The field installed VFD
will allow staged fan and will meet ASHRAE 90.1 or IECC two
speed fan requirements.
Base Sections: 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.
Hot Water Coils: Drain-able 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.
Steam Coils: 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 connections are
capped for storage and shipping.
Bottom Return: Air handling unit can be quickly converted to
bottom return for both vertical and horizontal applications. All
that is required is the removal of several screws and a single
panel on 7.5-15 ton and two panels on the 20 ton AHU.
Optional painted panel can be ordered to cover the side
return opening when utilizing the bottom return.
Supply Air Plenums: These fully insulated plenums are
available for free standing units located within the conditioned
space. They are shipped fully assembled for easy field
installation, are finished to match the exterior of the basic
unit, and include double deflection grills that can be adjusted
to vary the throw, spread and drop of the supply air.
Guide Specifications
Split System Cooling Only Condensing Units
Models: YC090-300, YD120-240 & Split System Heat
Pump Models: PC090-180, PD180-240
General
• Factory assembled, single piece, air cooled condensing
unit designed for outdoor installation.
• Factory wired, piped, and tested for leakage and
functionality to assure trouble-free installation and start-
up.
• Rated in accordance with AHRI Standard 340/360.
• Manufactured in a facility registered under the ISO 9002
manufacturing quality standard.
• Designed and tested in accordance with ASHRAE 15
Safety Code for Mechanical Refrigeration and comply
with NEC.
• Cooling performance rated in accordance with DOE
and AHRI test procedures.
• CSA listed and classified to UL 1995/CAN/CSA No.
236- M90 standards.
• One year limited parts warranty on complete unit with
an additional four year compressor warranty.
Unit Operating Characteristics
Operating Range shall be between 125° F to 40° F in cooling
as standard from factory.