York Predator ZT037 Technical Manual page 6

5167821-YTG-J-0518
connect screw terminals), A zone sensor, or can be setup
to communicate with multiple BAS communication
protocols to integrate with building automation systems.
• Reduce field installed complexity - Each unit will comes
equipped with factory installed supply air, return air, and
outdoor air temperature sensors providing key
temperature readings thus reduce field installed
complexity.
• On-board USB Port - The new control comes with a long
list of features including data logging, current and
previous system faults and software update capabilities
using the on board USB port and common flash drive.
Energy use monitoring capabilities allow custom tailoring
to allow a system to work more efficiently at all times and
occupancy levels. Self test and start-up reports also
available from the board VIA the USB port.
• Embedded LCD Display - The board has a easy to read,
built-in LCD display and easy to use navigation joystick
and buttons allowing the user to quickly navigate the
menus displaying unit status, options, current function,
supply, return and outdoor temperatures, fault codes and
other information.
• Safety Monitoring - The control monitors the outdoor,
supply, and return air temperatures and the high and low
pressure switch status on the independent refrigerant
circuits. On units with heating the gas valve and high
temperature limit switches are monitored on gas and
electric heating units. The control also monitors the
voltage supplied to the unit and will protect the unit if low
voltage due to a brown out, or other electrical issue
occurs.
• Low Ambient - An integrated low-ambient control allows
units to operate in the cooling mode down to 0°F outdoor
ambient without additional components or intervention.
Optionally, the control board can be programmed to
lockout the compressors when the outdoor air
temperature is low or when free cooling is available.
• Anti-Short Cycle Protection - To aid compressor life, an
anti- short cycle delay is incorporated into the standard
control. Compressor reliability is further ensured by
programmable minimum run times. For testing, the anti-
short cycle delay can be temporarily overridden with the
push of a button.
• Fan Delays - Fan on and fan off delays are fully
programmable. Furthermore, the heating and cooling fan
delay times are independent of one another. All units are
programmed with default values based upon their
configuration of cooling and/or heating capacity.
• Nuisance Trip Protection and Three Strikes - To
prevent nuisance calls, the control board uses a three
times, you're out philosophy. The high, low-pressure
switch, anti-freeze protection, low voltage or heating high
limit must trip three times within two hours before the unit
control board will lock out the associated compressor.An
alarm message will be displayed on the LCD screen.
• Lead-Lag - An integrated Lead-Lag option allows equal
run time hours on all compressors, thereby extending the
6
life of all compressors. This option is selectable on the unit
control board.
• Low Limit Control (LLC) - To prevent the supply air from
dropping below a specified set point, when there is a
demand for cooling during cold outside conditions.
(Programmable Set point)
• Reliable - From the beginning - All units undergo
computer automated testing before they leave the factory.
Units are tested for refrigerant charge and pressure, unit
amperage, and 100% functionality. For the long term - All
units are painted with a long lasting, powder paint that
stands up over the life of the unit. The paint used has
been proven by a 750-hour salt spray test.
• Full Perimeter Base Rails - The permanently attached
base rails provide a solid foundation for the entire unit and
protect the unit during shipment. The rails offer rigging
holes so that an overhead crane can be used to place the
units on a roof.
• Easy Installation - Gas and electric utility knockouts are
supplied in the unit underside as well as the side of the
unit. Utility connections can be made quickly and with a
minimum amount of field labor. All units are shipped with
2" throw-away filters installed.
• Wide Range of Indoor Airflows - All supply air blowers
are equipped with a belt drive that can be adjusted to
meet the exact requirements of the job. A high static drive
option is available for applications with a higher CFM and/
or static pressure requirement.
• Warranty - All models include a 1-year limited warranty
on the complete unit. Compressors and electric heater
elements each carry a 5-year warranty. Aluminized steel
(10 yr.) and stainless steel tubular heat exchangers carry
a 15- year warranty.
Factory Installed Options
®
YORK offers several equipment options factory installed, for
® line.
the Predator
• Optional Factory Installed Economizers - Predator units
offer a variety of optional factory installed economizers
with low leak dampers. The outdoor air dry bulb sensor
enables economizer operation if the outdoor air
temperature is less than the set point of the economizer
logic module. See economizer options section to
determine the correct economizer for your application.
• Down flow / End Return Economizers (with barometric
relief and fresh air hood) - All units offer a variety of
optional factory installed down flow economizers that are
shipped, installed and wired with low leak dampers
designed to meet ASHRAE 90.1, AMCA 511 Class 1A
damper, and the International Energy Conservation Code
(IECC) certification requirements by achieving leakage
rates of 3 CFM/sq. ft. at 1" of static pressure. Each
economizer goes through a rigorous 60,000 cycle test. Dry
bulb, single enthalpy, and dual enthalpy (with field installed
kit) can be selected. The economizer has spring return,
fully modulating damper actuators and is capable of
introducing up to 100% outdoor air. As the outdoor air
intake dampers open, the return air dampers close. The
changeover from mechanical refrigeration to economizer
Johnson Controls Ducted Systems