Trane Precedent PKGP-PRC003-EN User Manual page 55

Frostat
This option is to be utilized as a safety
device. The Frostat opens when
temperatures on the evaporator coil fall
below 10°F . The temperature will need to
rise to 50°F before closing. This option
should be utilized in low airflow or high
outside air applications.
LonTalk ® Communication Interface
This option shall be provided to allow the
unit to communicate as a Tracer™LCI-R
device or directly with generic LonTalk
Network Building Automation System
Controls.
Oversized Motors
Direct drive oversized motors shall be
available for high static applications.
Reference or Comparative Enthalpy
Reference Enthalpy is used to measure
and communicate outdoor humidity. The
unit receives and uses this information to
provide improved comfort cooling while
using the economizer. Comparative
Enthalpy measures and communicates
humidity for both outdoor and return air
conditions, and return air temperature.
The unit receives and uses this
information to maximize use of
economizer cooling, and to provide
maximum occupant comfort control.
Reference or Comparative Enthalpy
option shall be available when a factory
or field installed Downflow Economizer is
ordered. This option is available on all
downflow models.
T ool-less Hail Guards
Tool-less, hail protection quality coil
guards are available for condenser coil
protection.
Trane Communication Interface
This option shall be provided to interface
ReliaTel™ controlled units with the Trane
TM
Integrated Comfort systems.
PKGP-PRC003-EN
Mechanical
Specifications
Field Installed Options
CO Sensing
2
The CO sensor shall have the ability to
2
monitor space occupancy levels within
the building by measuring the parts per
million of CO (Carbon Dioxide) in the air.
2
As the CO levels increase, the outside air
2
damper modulates to meet the CO
space ventilation requirements.
Digital Display Zone Sensor
The Digital LCD (Liquid Crystal Display)
zone sensor has the look and functionality
of standard zone sensors. This sensor
includes a digital display of set point
adjustment and space temperature in F
(Fahrenheit) or C (Celsius). Includes FAN
and SYSTEM buttons (supports the
service functions of the standard sensor).
E-squared memory stores last
programmed set points. Requires 24 VAC
(Volts AC). This sensor should be utilized
with ReliaTel™ controls.
Dual Thermistor Remote Zone Sensor
This sensor will allow the customer to
reduce the total number of remote
sensors to obtain space temperature
averaging. This sensor should be utilized
with ReliaTel controls.
High Static Drive
The high static drive option shall allow the
standard motor on the 6 and 7½ ton units
to operate with improved external static
capabilities.
Manual Outside Air Damper
This rain hood and screen shall provide
up to 50 percent outside air.
Motorized Outside Air Dampers
Manually set outdoor air dampers shall
provide up to 50 percent outside air. Once
set, outdoor air dampers shall open to set
position when indoor fan starts. The
damper shall close to the full closed
position when indoor fan shuts down.
Powered Exhaust
The powered exhaust, available for 6-10
ton units, shall provide exhaust of return
air, when using an economizer, to
maintain better bulding pressurization.
Remote Potentiometer
The minimum position setting of the
economizer shall be adjusted with this
2
accessory.
Roof Curb
The roof curb shall be designed to mate
with the unit's downflow supply and
return and provide support and a water
tight installation when installed properly.
The roof curb design shall allow field-
fabricated rectangular supply/return
ductwork to be connected directly to the
curb. Curb design shall comply with
NRCA requirements. Curb shall be
shipped knocked down for field assembly
and shall include wood nailer strips.
Thermostat
Two stage heating and cooling operation
or one stage heating and cooling shall be
available in either manual or automatic
changeover. Automatic programmable
electronic with night set back shall also be
available.
Ventilation Override Accessory
With the Ventilation Override Accessory
installed, the unit can be set to transition
up to 3 different pre-programmed
sequences for Smoke Purge,
Pressurization, and Exhaust. The
transition occurs when a binary input on
the RTOM is closed (shorted). This would
typically be a hard wired relay output
from a smoke detector or fire control
panel. The ventilation override accessory
shall be available as field installed.
Zone Sensor
This control shall be provided to interface
with the Micro equipped units and shall
be available in either manual, automatic
programmable with night setback, with
system malfunction lights, or remote
sensor options.
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