Trane Precedent PKGP-PRC003-EN Manual de usuario

Packaged Heat Pumps

Precedent™

3-10Tons - 60 Hz

PKGP-PRC003-EN

September 2004

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

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.

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