Trane TSC060-120 User manual

Packaged Cooling with
Electric Heat Rooftop Units
Precedent™
TSC060-120
50 Hz
RT-PRC016-EN
February 2004

© 2004 American Standard Inc. All rights reserved RT-PRC016-EN
Introduction
Precedent™ . . . The same Trane quality...
with added flexibility. Precedent is a
flexible line of packaged units that covers
a wide variety of applications.
ReliaTel™microprocessor controls
provide superior flexibility for the
simplest to the most sophisticated
applications. In addition to controls,
Precedent offers many other outstanding
features and option choices.
With its sleek compact cabinet, rounded
corners and beveled top, it may just be
the most aesthetically pleasing packaged
unit on the planet. And, of course,
Precedent carries the Trane reputation
for excellence, quality and reliability.
It’s
hard to stop a Trane .
From simple applications, to the most
complex, Precedent has the solution.

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RT-PRC016-EN
Introduction
Features and Benefits
Application Considerations
Selection Procedure
Model Number Description
General Data
Performance Data
Zone Controls
Electrical Data
Jobsite Connections
Dimensional Data
Weights
Mechanical Specifications
2
4
9
10
12
13
14
33
34
35
36
44
45
Contents

4RT-PRC016-EN
Features and
Benefits
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.
Single Point Power
A single electrical connection powers the
unit.
Compressors
Precedent™contains the best
compressor technology available to
achieve the highest possible
performance. Our compressor line
includes Trane built reciprocating and
scrolls.
Easy Access Panels
Easy access panels reduce the number of
possible water entry points.
Low Ambient Cooling
All Precedent units have cooling
capabilities down to 0°F as standard.
Unit Base
For added water integrity, Precedent has
a raised 29 mm (1
1/8") lip around the
unit’s downflow supply and return to
prevent water from blowing into the
ductwork.
Sloped Drain Pans
Every Precedent unit has a non-
corrosive, removable, double-sloped
drain pan that’s easy to clean and
reversible to allow installation of drain
trap on either side of the unit.
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.
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.
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 Panels
Remove two screws for access to the
standardized internal components and
wiring.
Easy-Adjust Idler Arm
With the Easy-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. Patented Condenser Coil
Precedent boasts a patented 1+1+1
Hybrid coil, permanently gapped for
easy of cleaning.
Colored And Numbered Wiring
You save time and money tracing wires
and diagnosing the unit.

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Features and
Benefits
Flexible Applications
• Only two roof curbs for the 5-10 ton
Precedent line. . .simplifies curb
selection.
•ReliaTel microprocessor controls to
meet either the simple or the more
complex application.
• Airflow is outstanding. The Precedent
can replace an older machine with old
ductwork and, in many cases, improve
comfort through better air distribution.
• Belt drive — standard or oversized
supply fan motors meet a wide airflow
range.
• Precedent offers ultimate flexibility.
Options and components are not pre-
packaged at the factory. Units are built
to order in our standard “shortest in
the industry” ship cycle time.
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.
Easy Access Low Voltage Terminal
Board
Precedent’s Low Voltage Terminal Board
is external to the electrical control
cabinet. It is extremely easy to locate and
attach the thermostat wire. 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
Single-Side Service
Single-side service is standard on all
Precedent units.

6RT-PRC016-EN
Features and
Benefits
Micro Controls
Several years ago, Trane was the first to
introduce microprocessor controls into
the Light Commercial Market. That
design, along with immeasurable
experience, has provided the
technology for Trane’s second-
generation ReliaTel™microprocessor
controls.
ReliaTel™Micro:
• Provides unit control for heating,
cooling, and ventilating by utilizing
input from sensors that measure
outdoor and indoor temperature.
• Improves quality and reliability
through the use of time-tested
microprocessor controls 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.
• Reduces the number of components
required to operate the unit, thereby
reducing possibilities for component
failure.
• Eliminates the need for field-installed
components with its built-in anti-
short-cycle timer, time delay relay
and minimum ‘’on’’ time controls.
These controls are factory tested to
assure proper operation.
• Requires no special tools to run the
Precedent unit through its paces
during testing. Simply place a
jumper between Test 1 and Test 2
terminals on the Low Voltage
Terminal Board and the unit will walk
through its operational steps. 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 LED is lit, the Micro is
operational. The light indicates that
the Micro is functioning properly.
• Features expanded diagnostic
capabilities when used with Trane’s
Integrated Comfort ™ Systems.
• As an energy benefit, softens
electrical ‘’spikes’’ by staging on fans,
compressors and heaters.
• The Intelligent Fallback or Adaptive
Control is a benefit to the building
occupant. If a component goes
astray, the unit will continue to
operate at predetermined
temperature set points.
• Intelligent Anticipation is a standard
feature of the Micro. Functioning
constantly, the Micro and zone
sensors work together in harmony,
to provide tight comfort control.

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RT-PRC016-EN
Features and
Benefits
Factory-installed Options
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.
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.
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.
Clogged Filter/Fan Fail Switches
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.
Comm-3/4Trane Communication
Interface
Available factory or field-installed. This
module when applied with ReliaTel™
easily interfaces with Trane’s Integrated
Comfort™System.
The following options round-out the
complete line of Precedent™options:
— 0 - 50% Manual or Motorized
Outside Air
— Hail Protection Quality Coil Guards
— Electric Heaters (available as field
installed accessories)
— Discharge Air Sensor
— Wide array of Zone Sensors and
Thermostats
— Factory built Roof Curb
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. Designed
with input from field contractors and
engineers, its airflow performance is
outstanding.
Precedent…The same Trane
quality…with added flexibility.

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Features and
Benefits
VariTrac
When Trane’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.
• We perform a 100% coil leak test at the
factory. The evaporator and condenser
coils are leak tested at 1375 kPa (200
psig) and pressure tested to 3100 kPa
(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.
We test designs at our factory not on
our customers!
Quality And Reliability Testing
•All Precedent™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.
VariTrac™

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Application of this product should be
within the cataloged airflow and cooling
considerations.
Low Ambient Cooling
The Precedent™line features, with
ReliaTel™microprocessor controls, low
ambient cooling down to 18°C (0°F).
Contact your local Trane Representative
for more assistance with low ambient
cooling applications.
Barometric Relief
This product line offers an optional
barometric relief damper. for use in
conjunction with economizer option.
This accessory consists of gravity
dampers which open with increased
pressure. As the building air pressure
increases, the pressure in the unit return
air section also increases, opening the
dampers and relieving the conditioned
space.
NOTE: THE EFFECTIVENESS OF
BAROMETRIC RELIEF DAMPER
DURING ECONOMIZING OPERATION
IS SYSTEM RELATED.
PRESSURE DROP OF THE RETURN AIR
SYSTEM SHOULD BE CONSIDERED TO
CONTROL BUILDING PRESSURIZA-
TION.
Condensate Trap
The evaporator is a draw-thru
configuration. A trap must be field
provided prior to start-up on the cooling
cycle.
Clearance Requirements
The recommended clearances identified
with unit dimensions should be
maintained to assure adequate service
maximum capacity and peak operating
efficiency. Actual clearances which
appear inadequate should be reviewed
with the local Trane sales personnel.
Unit Pitch
These units have reversible sloped
condensate drain pans. Units must be
installed level, any unit slope must be
toward the side of unit where
condensate drain is connected.
Application
Considerations

10 RT-PRC016-EN
Cooling Capacity
Step 1
Calculate the building’s total and sensible
cooling loads at design conditions. Use
the Trane calculation methods or any
other standard accepted method.
Factors used in unit selection:
A
Total Cooling Load: 16.7 kW
B
Sensible Cooling Load: 11.7 kW
C
Airflow: 3400 m3/h
D
Electrical Characteristics: 380-415/50/3
E
Summer Design Conditions: Entering
Evaporator Coil: 27 DB, 19 WB Outdoor
Ambient: 35
F
External Static Pressure: 110 Pa
Step 2
Table PD-1 shows that a TSC060AD has a
gross cooling capacity of 17.8 kW and
14.4 kW sensible capacity at 3400 m3/h
and 35 DB outdoor ambient with 27 DB,
19 WB air entering the evaporator.
To Find Capacity at Intermediate
Conditions Not in the Table
When the design conditions are between
two numbers that are in the capacity
table, interpolation is required to
approximate the capacity. Note:
Extrapolation outside of the table
conditions is not recommended.
Step 3
In order to select the correct unit which
meets the building’s requirements, the
fan motor heat must be deducted from
the gross cooling capacity. The amount
of heat that the fan motor generates is
dependent on the effort by the motor -
cfm and static pressure. To determine
the total unit static pressure:
External Static (duct system)
110 Pa
Standard Filter 1 in. 37 Pa
from Table PD-21
Economizer 5 Pa
(100% Return Air) from
Table PD-21
Electric Heater Size 7.5 kW 17 Pa
from Table PD-21
Total Static Pressure 169 Pa
Note: The Evaporator Fan Performance
Table PD-6 has deducted the pressure
drop for a 25 mm filter already in the
unit (see note below Table PD-6).
Therefore, the actual total static pressure
is 169-17 (from Table PD-21) = 152 Pa.
With 3400 m3/h and 152 Pa
Table PD-6 shows .67 kW for this unit.
Note below the table gives a formula to
calculate Fan Motor Heat,
Fan Motor Heat (kw) =
1.144 x (Fan kW) + 0.132
= 1.144 x 0.67 + 0.132 = 0.90 kW
Now subtract the fan motor heat from
the gross cooling capacity of the unit:
Net Total Cooling Capacity
= 17.8 kW - 0.9 = 16.9 kW.
Net Sensible Cooling Capacity
= 14.4 kW - 0.9 = 13.5 kW.
Step 4
If the performance will not meet the
required load of the building’s total or
sensible cooling load, try a selection at
the next higher size unit.
Heating Capacity
Step 1
Calculate the building heating load using
the Trane calculation form or other
standard accepted method.
Step 2
Size the system heating capacity to
match the calculated building heating
load. The following are building heating
requirements:
A
Total heating load of 5 kW
B
2000 cfm
C
380 volt/3 phase Power Supply
The electric heat accessory capacities are
listed in Table PD-23. From the table, the
smallest heater will deliver 7.5 kW at
380 V. Referring to Table ED-2, the
electric heater selection is
BAYHTRR412A.
Air Delivery Selection
External static pressure drop through the
air distribution system has been
calculated to be 110 Pa. From Table PD-
21 static pressure drop through the
economizer is 5 Pa and the 7.5 kW heater
is 17 Pa (110 + 5 + 17). Enter Table PD-6
for a TSC060AD at 3400 m3/h and 132 Pa
static pressure. The standard motor will
give the desired airflow at a rated kW of
0.64.
Accessory Selection
Select accessories needed to
accommodate the application.
Selection
Procedure - SI Units