Catalogue

8 UV-PRC003-EN
Features and Benefits
Unit Filter
Each classroom unit ventilator comes equipped with a standard-size throwaway filter to support
job site installation and start-up. However, the Trane unit ventilator is designed to accommodate
the use of a MERV 8 or MERV 13 high capacity filter to provide greater filtration of airborne
contaminants.
Dehumidification
Trane unit ventilators provide a broad range of dehumidification solutions. Active humidity control
involves monitoring and managing both the dry bulb temperature and the humidity in the
classroom. With this strategy, a reheat coil is placed downstream of the cooling coil to temper
(reheat) the cold, dehumidified air leaving the cooling coil to avoid over-cooling the space. Reheat
configurations are available in a variety of coil combinations.
Alternately, the Tracer™ UC400 or Tracer ZN520 controller can be configured to automatically
reduce the fan speed at part-load conditions. This helps improve the coincidental dehumidification
performance of the unit at part-load, and also lowers sound levels. To help ensure proper
ventilation in the classroom at lower fan speeds, the controller adjusts the outside air being
supplied to the classroom.
Economizer
One big advantage of a Unit Ventilator system is the ability to provide energy savings through an
economizer cycle. During mild seasons outside air is used to provide “free” cooling, thereby,
minimize or eliminate the need to run mechanical cooling equipment. To truly have an effective
economizer a Unit Ventilator must be able to bring in up to 100 percent of the design airflow
through the outside air damper opening. Trane Unit Ventilators are tested and certified to exceed
the industry standard, as defined by AHRI 840, for economizer effectiveness. This ensures the
school will realize the energy savings available through the economizer strategy.
Face and Bypass Actuator
The face and bypass damper actuator incorporates a direct couple design. It provides electronic
protection against overload. A limit switch is not included, nor required as part of the design. When
reaching the damper end position, the actuator automatically stops. The gears can be manually
disengaged with a button on the housing.
Acoustics
Quiet systems are extremely important in today’s classrooms. Trane offers many different system
solutions to balance the requirements of sound, cost, IAQ and efficiency. The Trane vertical unit
ventilator takes a comprehensive approach to delivering one of the quietest units available.
Fan and Blower Motor Assembly
Several innovative ideas have gone into the quiet design of the Trane vertical unit ventilator. The
fans diameters have been maximized to reduce the motor rpm and thus lower the noise, while still
maintaining the cfm requirements to support ventilation and capacity requirements. The unique
direct-drive fan and blower design diminishes vibration from occurring further ensuring quiet
operation.
Fan Speed Control
Trane provides the capability to vary airflow for suitable applications either with three speeds or
with a 0–10 Vdc input. This lowers the sound in the space and improves the dehumidification in the
cooling season at part-load. With field installed controls, this is accomplished with a unit-mounted
manual fan speed switch (allowing either 2- or 3-speed control) or variable speed control with a
0–10 Vdc input. ECM controls provide a soft ramp between speed changes—a significant
contributor to overall quiet operation.
UV-PRC003-EN.book Page 8 Tuesday, June 4, 2013 8:59 PM