Trane Precedent PKGP-PRC003-EN User manual

Packaged Heat Pumps
Precedent™
3-10Tons - 60 Hz
PKGP-PRC003-EN
September 2004

© 2004 American Standard Inc. All Rights Reserved PKGP-PRC003-EN
Introduction
Packaged Rooftop
Air Conditioners
Through the years,Trane has designed
and developed the most complete line of
Packaged Rooftop products available in
the market today.Trane was the first to
introduce the Micro—microelectronic unit
controls—and has continued to improve
and revolutionalize this design concept.
The ReliaTel control platform offers the
same great features and functionality as
the original Micro, with additional benefits
for greater application flexibility.
With its sleek compact cabinet, rounded
corners and beveled top Precedent
continues to provide the highest
standards in quality and reliability,
comfort, ease of service, and the
performance of Trane light commercial
products.
Trane customers demand products that
provide exceptional reliability, meet
stringent performance requirements,
and are competitively priced. Trane
delivers with Precedent.
Precedent features cutting edge
technologies: reliable compressors,
Trane engineered ReliaTel controls,
computer-aided run testing, and
Integrated Comfort™ Systems. So,
whether you’re the contractor, the
engineer, or the owner you can be
certain Precedent Products are built to
meet your needs.
It’s HardTo Stop ATrane.®

PKGP-PRC003-EN 3
Contents
Introduction
Features and Benefits
Application Considerations
Selection Procedure
Model Number Description
General Data
Performance Data
Cooling Performance
Fan Performance
Heat Performance
Controls
Electric Power
Dimension and Weights
Mechanical Specifications
2
4
11
12
13
14
17
17
20
29
37
38
45
53

4PKGP-PRC003-EN
Factory Installed Options
• Black Epoxy Pre-Coated Coils
• High Pressure Cutout
• Hinged Access Doors
• Phase Monitor
• Powered or Unpowered Convenience
Outlet
• Supply and/or Return Air Smoke
Detector
• Through the Base Electrical Access
• Through the Base Electrical With Circuit
Breaker
• Through the Base Electrical With
Disconnect Switch
• Two-Inch Pleated Filters
Factory or Field Installed Options
•Clogged Filter/Fan Failure Switch
•Differential Pressure Switches
•Discharge Air Sensing Kit
•Economizer
•Electric Heaters
•Frostat
•LonTalk® Communications Interface
•Oversized Motors
•Reference or Comparative Enthalpy
•Tool-less Hail Guards
•Trane Communications Interface (TCI)
Field Installed Options
•CO2Sensing
•Digital Display Zone Sensor
•DualThermistor Remote Zone Sensor
•High Static Drive
•Manual Outside Air Damper
•Motorized Outside Air Dampers
•Powered Exhaust
•Remote Potentiometer
•Roof Curb
•Thermostat
•Ventilation Override Accessory
•Zone Sensor
Features and
Benefits

PKGP-PRC003-EN 5
Easy to Install, Service and
Maintain
Because today’s owners are very cost-
conscious when it comes to service and
maintenance, theTrane Precedent was
designed with direct input from service
contractors.This valuable information
helped to design a product that would get
the serviceman off the job quicker and
save the owner money. Precedent does
this by offering:
Quality and Reliability
ReliaTel™ Controls (LCI-R)
ReliaTel controls provide unit control for
heating, cooling and ventilating utilizing
input from sensors that measure outdoor
and indoor temperature.
Quality and Reliability are enhanced
through ReliaTel control and logic:
—prevents the unit from short cycling,
considerably improving
compressor life.
—ensures that the compressor will run
for a specific amount of time which
allows oil to return for better
lubrication, enhancing the reliability of
the compressor.
Precedent with ReliaTel reduces the
number of components required to
operate the unit, thereby reducing
possibilities for component failure.
ReliaTel Makes Installing and
Servicing Easy
ReliaTel eliminates the need for field
installed anti-shortcycle timer and time
delay relays. ReliaTel controls provide
these functions as an integral part of the
unit.The contractor no longer has to
purchase these controls as options and
pay to install them.
The wiring of the low voltage connections
to the unit and the zone sensors is as
easy as 1-1, 2-2, and 3-3.This simplified
system makes wiring easier for the
installer.
ReliaTel MakesTesting Easy
ReliaTel requires no special tools to run
the Precedent unit through its paces.
Simply place a jumper betweenTest 1
andTest 2 terminals on the Low Voltage
Terminal Board and the unit will walk
through its operational steps
automatically.
—The unit automatically returns
control to the zone sensor after
stepping through the test mode a
single time, even if the jumper is
left on the unit.
As long as the unit has power and the
“system on” LED is lit, ReliaTel is
operational.The light indicates that the
controls are functioning properly.
ReliaTel features expanded diagnostic
capabilities when utilized withTrane
Integrated Comfort™ Systems.
Some zone sensor options have central
control panel lights which indicate the
mode the unit is in and possible
diagnostic information (dirty filters for
example).
Other ReliaTel Benefits
The ReliaTel built-in anti-shortcycle timer,
time delay relay and minimum “on” time
control functions are factory tested to
assure proper operation.
ReliaTel softens electrical “spikes” by
staging on fans, compressors and
heaters.
Intelligent Fallback is a benefit to the
building occupant. If a component goes
astray, the unit will continue to operate at
predetermined temperature setpoint.
Intelligent Anticipation is a standard
ReliaTel feature. It functions continuously
as ReliaTel and zone sensor(s) work
together in harmony to provide much
tighter comfort control than conventional
electro-mechanical thermostats.
The same ReliaTel Board fits all
Precedent Packaged Gas/Electrics,
Cooling with Electric Heat, and Heat
Pump models.This provides
standardization of parts for contractors.
Less money is tied up in inventory with
ReliaTel.
ReliaTel™
Features and
Benefits

6PKGP-PRC003-EN
Features and
Benefits
Black Epoxy Pre-Coated Coils
The pre-coated coils are an economical
option for protection in mildly corrosive
environments.
Cabinet Integrity
For added water integrity, Precedent has
a raised 11/8" lip around the supply and
return of the downflow units to prevent
water from blowing into the ductwork.
Clogged Filter/Fan Failure Switch
A dedicated differential pressure switch is
available to achieve active fan failure
indication and/or clogged filter indication.
These sensors allow a zone sensor
service light or Integrated Comfort
System to indicate a dirty filter or a fan
that’s not working.The field installation
charges for these valuable feedback
devices often eliminate them from
consideration. Factory installation can
make such features a good investment.
CO2Sensing
The CO2sensor has the ability to monitor
space occupancy levels within the
building by measuring the parts per
million of CO2(Carbon Dioxide) in the air.
As the CO2levels increase, the outside air
damper modulates to meet the CO2
space ventilation requirements.The CO2
sensor kit is available as a field installed
accessory.
Colored And NumberedWiring
Save time and money tracing wires and
diagnosing the unit.
Outstanding Standard and
Optional Components
Compressors
Precedent contains the best compressor
technology available to achieve the
highest possible performance. Our
compressor line includes reciprocating
and scrolls.
Condenser Coil
Precedent boasts a patent-pending
1+1+1 condenser coil, permanently
gapped for easy cleaning.
Digital Display Zone Sensor
The Digital LCD (Liquid Crystal Display)
zone sensor has the look and functionality
of standard zone sensors. This sensor
should be utilized with ReliaTel™ controls.
Discharge Air Sensing Kit
Provides true discharge air sensing in
heating models. The kit is functional only
with the ReliaTel Options Module.
Downflow And Horizontal Economizers
The economizers come with three control
options — dry bulb is standard, enthalpy
and differential enthalpy are optional.
DualThermistor Remote Zone Sensor
This sensor will reduce the total number
of remote sensors to obtain space
temperature averaging. This sensor
should be utilized with ReliaTel controls.
Foil-Faced Insulation
All panels in the evaporator section of the
unit have cleanable foil-faced insulation.
All edges are either captured or sealed to
ensure no fibers get into the airstream.
Factory Built Roof Curbs
Only two roof curbs for the entire
Precedent line simplifies curb selection.
Flexibility
Units are built to order in our standard
“shortest in the industry” ship cycle time.
Fresh Air
0 - 25% manual or 0 - 50% motorized
outside air hoods are available.

PKGP-PRC003-EN 7
High Pressure Cutout
This factory-installed option is offered for
units that do not have High Pressure
Cutout as standard. All 3-phase units with
scroll compressors include High Pressure
cutout as standard.
High Static Drive Accessory
Available on many models, this high
static drive accessory extends the
capability of the standard motor. Avoid
expensive motors and operating costs by
installing this optimized sheave
accessory.
Hinged Access Doors
These doors permit easy access to the
filter, fan/heat, and compressor/control
sections. They
reduce the
potential roof
damage from
screws or sharp
access door
corners.
LonTalk®
Communications
Interface
The LonTalk
communications
interface allows
the unit to
communicate as aTracer™LCI-V device
or directly with generic LonTalk Network
Building Automation System Controls.
Phase Monitor
Phase monitor shall provide 100%
protection for motors and compressors
against problems caused by phase loss,
phase imbalance, and phase reversal.
Phase monitor is equipped with an LED
that provides an ON or FAULT indicator.
Power Exhaust Option
This option is available to maintain proper
building pressurization. Great for relieving
most building overpressurization
problems.
Quick-Access Panels
Remove two screws for access to the
standardized internal components and
wiring.
Quick-Adjust Idler Arm
With the Quick-Adjust Idler Arm, the belt
and sheaves can be quickly adjusted
without moving the mounted fan motor.
The result is a major savings in time and
money.
Reference or Comparative Enthalpy
Measures and communicates humidity
while maximizing comfort control.
Sloped Drain Pans
Every Precedent unit has a non-
corrosive, removable, double-sloped
drain pan that’s
easy to clean and
reversible to allo w
installation of
drain trap on
either side of the
unit.
Features and
Benefits
Standardized Components
Components are placed in the same
location on all Precedent units. Familiarize
yourself with one Precedent and you are
familiar with every Precedent.
Due to standardized components
throughout the Precedent line,
contractors/owners can stock fewer
parts.
Supply and/or Return Air Smoke
Detector
With this option
installed, if smoke is
detected, all unit
operation will be shut
down. Reset will be
manual at the unit.
Return Air Smoke
Detectors require
minimum allowable
airflow when used
with certain models.
Tool-less Hail Guards
Tool-less, hail protection quality coil
guards shall be either factory or field-
installed for condenser coil protection.
This option protects the condenser coil
from vandalism and/or hail damage.
Trane Communication Interface (TCI)
Available factory or field installed.This
module when applied with the ReliaTel™
easily interfaces withTrane’s Integrated
ComfortTM System.

8PKGP-PRC003-EN
Unit Cabinet
The compact cabinet with rounded
corners takes up less room and is less
costly to ship. The beveled and ribbed top
is not only aesthetically pleasing, it is
designed to prevent water from pooling.
VariTrac
WhenTrane’s changeover VAV System
for light commercial applications is
coupled with Precedent, it provides the
latest in technological advances for
comfort management systems and can
allow thermostat control in every zone
served by VariTrac.
Ventilation Override Accessory
With the Ventilation Override Accessory
installed, the unit can be set to transition
to 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 kit is
available as a field installed accessory.
Zone Sensors
Available in programmable, automatic
and manual styles.
Precedent offers ultimate flexibility. Units
are built to order in our standard
“shortest in the industry” ship cycle time.
Rigorous Testing
All of Precedent’s designs were
rigorously rain tested at the factory to
ensure water integrity.
Actual shipping tests were performed to
determine packaging requirements. Units
were test shipped around the country to
determine the best packaging. Factory
shake and drop tests were used as part
of the package design process to help
assure that the unit arrives at the job site
in top condition.
Rigging tests include lifting a unit into the
air and letting it drop one foot, assuring
that the lifting lugs and rails hold up under
stress.
We perform a 100% coil leak test at the
factory.The evaporator and condenser
coils are leak tested at 200 psig and
pressure tested to 450 psig.
All parts are inspected at the point of final
assembly. Sub-standard parts are
identified and rejected immediately.
Every unit receives a 100% unit run test
before leaving the production line to
make sure it lives up to rigorousTrane
requirements.
Features and
Benefits
VariTrac™

PKGP-PRC003-EN 9
Easy to Install
Convertible Units
–The units ship in a downflow
configuration.They can be easily
converted to horizontal by simply
moving two panels.
– Units come complete with horizontal
duct flanges so the contractor doesn’t
have to field fabricate them.These duct
flanges are a time and cost saver.
Easy Access Low Voltage Terminal Board
Precedent’s Low VoltageTerminal Board
is external to the electrical control
cabinet. It is extremely easy to locate and
attach the thermostat wire and test
operation of all unit functions.This is
another cost and time saving installation
feature.
Low Voltage Connections
The wiring of the low voltage connections
to the unit and the zone sensors is as
simple as 1-1, 2-2, and 3-3.This simplified
system makes it easy for the installer to
wire.
Electric Heaters
Electric heat modules are available within
the basic unit. If ordering theThrough the
Base Electrical option with an Electrical
Heater, the heater must be factory
installed.
Powered or Unpowered Convenience
Outlet
This option is a GFCI, 120v/15amp, 2 plug,
convenience outlet, either powered or
unpowered.This option can only be
ordered when theThrough the Base
Electrical with either the Disconnect
Switch, or Circuit Breaker, option is
ordered.
Single Point Power
A single electrical connection powers the
unit.
Single Side Service
Single side service is standard on all
units.
Through the Base Condensate
Every unit includes provisions for through
the base condensate drain connections.
This allows the drain to be connected
through the roof curb instead of a roof
penetration.
Through the Base Electrical Utility
Access
Factory provided through the base
openings simplify wiring and piping.
Because these utility openings frequently
minimize the number of roof
penetrations, the integrity of roofing
materials is enhanced.
Through the Base Electrical with Circuit
Breaker
This option is a factory installed thermal
magnetic, molded case, HACR Circuit
Breaker with provisions for through the
base electrical connections.
Features and
Benefits

10 PKGP-PRC003-EN
Through the Base Electrical with
Disconnect Switch
Factory installed 3-pole, molded case,
disconnect switch with provisions for
through the base electrical connections
are available.
Through the Base Utilities Access
An electrical service entrance shall be
provided allowing electrical access for
both control and main power connections
inside the curb and through the base of
the unit. Option will allow for field
installation of liquid-tight conduit and an
external field installed disconnect switch.
Unit Mounted Disconnect or Circuit
Breaker
Codes require a method of assured unit
shutdown for servicing. Field-installed
disconnects sometimes interfere with
service access. Factory installation of unit
disconnects reduces costs, assures
proper mounting and provides the
opportunity to upgrade to unit circuit
breaker protection.
Added Efficiency
Airflow
Airflow is outstanding.The Precedent can
replace an older machine with old
ductwork and, in many cases, improve
the comfort through better air
distribution.
Belt or direct drive – standard or
oversized supply fan motors meet a wide
airflow range.
Cooling
Standard or High Efficiency Cooling
available.
Economizer
Equipped with either dry bulb, reference
or comparative enthalpy sensing, this
feature provides free cooling as the
outdoor temperature and/or humidity
decreases. Economizers, correctly
installed, offer a valuable energy savings.
Factory-installed economizers save time
and ensure proper installation.
High Efficiency Motors
This option is available with efficiency
ratings from 86.5 up to 91.0. It is not
available for all models.
Low Ambient Cooling
All Precedent microprocessor units have
cooling capabilities down to 0°F as
standard. Electromechanical models
have cooling capabilities to 40°F as built,
or to 0°F by adding the optional low
ambient control (frostat).
Oversized Motors
Factory or field installed oversized
motors available for high static
applications.
One of our Finest Assets:
Trane Sales Representatives are a
Support Group that can assist you with:
— Product
— Application
— Service
— Training
— Special Applications
— Specifications
— Computer Programs and much more
Precedent has the features and benefits
that make it first class in the light
commercial rooftop market.
Features and
Benefits
Convenience Outlet
Unit Mounted Disconnect
or Circuit Breaker
Factory Installed Options
A wide variety of Factory Installed
Options (FIOPs) are available.