York Predator ZF120 Technical Manual page 7

the product in the horizontal, end return
configuration.
• Motorized Outdoor Air Damper - The motorized outdoor
air damper includes a slide-in/plug-in damper assembly
with an outdoor air hood and filters. The outdoor air
dampers open to the preset position when the indoor fan
motor is energized. The damper has a range of 0% to
100% outdoor air entry.
• Alternate Indoor Blower Motor - For applications with
high static restrictions, units are offered with optional
indoor motors that provide higher static output and/or
higher airflow, depending upon the installer's needs.
• Variable Air Volume (VAV; 6.5 through 12.5 ton, only -
A factory-installed variable frequency drive (VFD),
mounted in the Blower Access compartment, is used to
control the speed of the indoor blower motor in order to
maintain a constant static pressure in the supply duct. A
duct pressure transducer is provided with the unit. The
drive comes completely wired and pre-programmed from
the factory.
An optional, factory-installed manual bypass switch
available with factory-installed VFD can be found in the
Blower Motor Access compartment. The switch can be
used to either route power to the VFD for modulating
control of the blower motor, to bypass the drive and
operate the motor at full speed, or to power the drive (and
not the motor) for diagnostic purposes.
VAV is not available with the factory-installed 3rd. party
BAS controllers. VAV is only factory installed with the
Smart Equipment™ Controller.
A 'VFD-ready' option provides the provisions for a
customer-installed drive. The unit comes with a mounting
bracket installed in the Blower Access compartment which
may accommodate other vendor's drives depending on
their size. In order to utilize the unit's mounting bracket,
the maximum recommended drive dimensions are limited
to approximately 9" H x 5" W x 7.5" D.
If the drive will not fit in the allotted space, then it will have
to be mounted elsewhere; either within the building on a
perpendicular wall which is not subjected to excessive
temperature, vibration, humidity, dust, corrosive gas,
explosive gas, etc., or within an appropriate enclosure
rated for outside installation to safeguard against
moisture, dust and excessive heat. A terminal block
located in the control box is provided for field connection
of the VFD controls.
• IntelliSpeed™ Supply Fan Control Option (ASHRAE
90.1 compliant, section 6.4.3.10) - Units configured with
the IntelliSpeed™ Supply Fan Option will contain a VFD
for multi-speed supply fan operation. This option allows
the supply fan RPM to vary based on the number of
compressors or heating stages energized. The
economizer's minimum position will also be configurable
to vary based on the supply fan VFD frequency output.
• Aluminized Steel Gas Heat Exchanger - For
applications in non-corrosive environments.
Johnson Controls Unitary Products
• Stainless Steel Gas Heat Exchanger - For applications
in corrosive environments, this option provides a full
stainless steel heat exchanger assembly.
• Stainless Steel Drain Pan - An optional rust-proof
stainless steel drain pan is available to provide years of
trouble-free operation in corrosive environments.
• Electric Heaters - The electric heaters range from 9kW to
54kW and are available in all the voltage options of the
base units. All heaters are dual staged. All heaters are
intended for single point power supply.
• Disconnect Switch - For gas heat units and cooling units
with electric heat, a HACR breaker sized to the unit is
provided. For cooling only units, a switch sized to the
largest electric heat available for the particular unit is
provided. Factory installed option only.
• Convenience Outlet - (Non-Powered/Powered) - This
option locates a 120V single-phase GFCI outlet with cover,
on the corner of the unit housing adjacent to the
compressors. The "Non-powered" option requires the
installer to provide the 120V single-phase power source and
wiring. The "Powered" option is powered by a stepdown
transformer in the unit. Factory installed option only.
• Smoke Detectors - The smoke detectors stop operation
of the unit and provide a fault message to the control
board. Smoke detectors are available for both the supply
and/or return air configurations.
• Filters – 2" Pleated MERV 8 or 4" Pleated MERV 13 are
available to meet LEED requirements. A 2" Throwaway is
shipped as standard.
Factory-installed smoke detectors may be subjected to
extreme temperatures during "off" times due to outside air
infiltration. These smoke detectors have an operational
range of -4 °F to 158°F. Smoke detectors installed in areas
that could be outside this range will have to be relocated to
prevent false alarms.
• Phase Monitors - Designed to prevent unit damage. The
phase monitor will shut the unit down in an out-of phase
condition. (Standard on units with Scroll Compressors.)
• Coil Guard - Customers can purchase a coil guard kit to
protect the condenser coil from damage. Additionally, this
kit stops animals and foreign objects from entering the
space between the inner condenser coil and the main
cabinet. This is not a hail guard kit.
• Dirty Filter Switch - This kit includes a differential
pressure switch that energizes the fault light on the unit
thermostat, indicating that there is an abnormally high
pressure drop across the filters. Factory installed option or
field installed accessory.
• E-Coat Condenser Coils - The condenser coils are
coated with an epoxy polymer coating to protect against
corrosion.
• E-Coat Evaporator Coils - The evaporator coils are
coated with an epoxy polymer coating to protect against
corrosion.
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