Balanced Heating; Convertible Airflow Design; Advanced, Versatile Controls; Reduced Field-Installed Complexity - York ZT SERIES Technical Manual

Balanced heating

®
The Predator two stage gas heating offers ultimate heating comfort with a balance between first and second stage gas
heating. The first stage of a gas heat Predator
6.5 to 12.5 ton units reach 60% heating capacity on the first stage.

Convertible airflow design

A convertible airflow design provides maximum field flexibility while minimizing inventory. The side ducts are covered when the
units leave the factory. In a side supply/return application, the installer simply removes the two side duct covers from the
outside of the unit and installs them over the down shot openings without having to cut any panels.

Advanced, versatile controls

• Smart Equipment™ control boards have standardized a
number of features previously available only as options
or by using additional controls.
• The unit control incorporates the best of the already
proven Simplicity™ controls and creates a more robust,
intelligent control. The goal of this control is to use
cutting edge technology making the equipment easier to
install, operate, and service. All units are factory
commissioned, configured, and run tested.
• The Smart Equipment™ control can be configured for
use with a standard thermostat (easy to connect screw
terminals), a zone sensor, or can be set up to
communicate with multiple BAS communication
protocols to integrate with building automation systems.
• On-board USB port
The Smart Equipment™ control comes standard with an on-board USB port that accepts a common flash drive. This port can
be used for features like data logging, listing current and previous system faults, and backing up or updating the software
version. Self-test and start up reports are also available through the USB port.
• Embedded LCD display
The board has an 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.
The Smart Equipment™ control board used in this product will effectively operate the cooling system
down to 0°F when this product is applied in a comfort cooling application for people. An economizer is
typically included in this type of application. When applying this product for process cooling
applications (computer rooms, switchgear, etc.), please call the applications department for Ducted
Systems @ 1-877-874-SERV for guidance. Additional accessories may be needed for stable
operation at temperatures below 30°F.

Reduced field-installed complexity

Each unit comes equipped with factory installed supply air, return air, and outdoor air temperature sensors providing key
temperature readings thus reduce field installed complexity.
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.
Johnson Controls Ducted Systems
®
unit provides 70% or 75% of the heating capacity for the 3 to 5 ton units. The
.
5167821-YTG-K-1118
7