Factory And Field-Installed Options; Single Or Dual Enthalpy Control Accessories; Power Exhaust; Motorized Outdoor Air Damper - York ZT SERIES Technical Manual

5167821-YTG-K-1118

Factory and field-installed options

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YORK offers several factory and field-installed options for the Predator
Down flow and end return economizers with barometric relief and fresh air hood
Factory or field-installed option
All units offer a variety of optional factory-installed or field-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-inch 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 operation is regulated by the outdoor air dry bulb temperature or the outdoor air enthalpy input. The
installer needs only to assemble the outdoor air hood, attach the enthalpy control the hood and mount the hood to the unit
(hood and control are provided).

Single or dual enthalpy control accessories

Field-installed option
The single enthalpy or dual enthalpy control kits provide sensors to monitor outdoor air and/or return air humidity and
temperature for true enthalpy control of the unit economizer.

Power exhaust

Factory or field-installed option
This factory or field installed option allows down flow or horizontal end return economizer operation. Field installation user must
purchase the 1EH0408 barometric relief and hood kit when applying the product in a horizontal flow application. The power
exhaust must be removed from the unit and mounted in the horizontal end return duct work when applying the product in the
horizontal, end return configuration.

Motorized outdoor air damper

Factory or field-installed option
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.
Manual outdoor air damper
Field-installed option
The manual outdoor air damper includes a slide-in damper assembly with an outdoor air hood and filters. Customers have a
choice of dampers with ranges of 0% to 100% or 0% to 35% outdoor air entry.
Barometric relief damper
Field-installed option
Zero to 100% capacity barometric relief dampers for use with horizontal flow, or field installed economizers.
Alternate indoor blower motor
Factory option
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.
Aluminized steel gas heat exchanger
Factory option
The standard gas heat exchanger option for applications in non-corrosive environments.
Stainless steel gas heat exchanger
Factory option
The gas heat exchanger option for applications in corrosive environments. This option provides a full stainless steel heat
exchanger assembly.
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