Innovative technology and an
impressive lineup of features make the
Trane IntelliPak Rooftop line the number
one choice for today and the future.
Trane’s rooftop Unit Control Module
(UCM), an innovative, modular
microprocessor control design,
coordinates the actions of the IntelliPak
rooftop in an efficient manner and allows
for stand-alone operation of the unit.
Access to the unit controls, via a Human
Interface Panel, provides a high degree
of control, superior monitoring
capability, and unmatched diagnostic
information.
Optionally, for centralized building
control on-site, or from a remote
location, IntelliPak can be configured for
direct communication with a Trane
Tracer™ building management system
rd
party LonTalk building
or a 3
management system, using a twisted
pair of wires. With one of these systems,
the IntelliPak status data and control
adjustment features can be conveniently
monitored from a central location.
• Unit mounted Human Interface Panel
with a 2 line x 40 character English
display and a 16 function keypad that
includes Custom, Diagnostics, and
Service Test mode menu keys.
• Trane 3-D
(20 to 130 Tons)
• Compressor or circuit lead/lag
depending on unit
• Hinged access doors on control panel,
filter section, and gas heat section
• Horizontal discharge/return duct
connections (SX, SL, SS models)
• CV or VAV control
• Low ambient compressor lockout
control on units with economizers
• Frostat™ coil frost protection on
all units
• Daytime Warm-up (Occupied mode)
on VAV models and Morning Warm-up
operation on all units with heating
options
• Supply air static overpressurization
protection on units with inlet guide
vanes and VFD’s.
• Supply airflow proofing
• Exhaust airflow proofing on units with
exhaust option
• Supply air tempering control
• Supply air heating control on VAV
modulating hot water or steam heat
units
• Emergency stop input
• Liquid and Discharge Service Valves
• Mappable sensors and setpoint
sources
• Occupied/Unoccupied switching
• Timed override activation
• Forward-curved supply fans (20 - 75
ton models)
• Air foil supply fans (90 - 130 ton
models)
• Pitched roof over air handler section
• Stainless steel flue stack on gas heat
units
• 14-gauge, single-piece construction
base rails
™
Scroll compressors
• UL and CSA approval on standard
options
• Two-inch spring fan isolation
(90 to 130 tons)
• Meets 672 hours of salt spray testing in
accordance to ASTM B117 Standard
• Two inch standard efficiency
throwaway filters on 20 to 90 ton units
and two inch high efficiency
throwaway filters on 105 to 130 ton
units.
Optional Features
For a comprehensive listing of standard
options, special options, and
accessories, please see table O-1 starting
on page 96.
• Trane Communication Interface
Module: ICS interface control module
®
• LonTalk
module
• Remote Human Interface Panel
(controls up to 4 units)
• Five ventilation override sequences
• Heating options: natural gas, electric,
hot water or steam
• Generic BAS interface
• Choose from three economizer control
options: comparative enthalpy,
reference enthalpy, dry bulb control
• Variable frequency drive control of
supply/exhaust fan motor
• Inlet guide vanes on FC supply fans
(VAV only)
• Outside air CFM compensation on VAV
units with IGV (or VFD) and economizer
• Hot gas bypass to the evaporator inlet
• Copper evaporator/condenser coils
• Suction service valves
• Replaceable core filter driers
• Phenolic coated evaporator/condenser
coils
• High capacity evaporator coils
(20 to 105 tons)
• Special paint colors
• Extended casing (SX models)
• Double wall access doors
• Double wall construction/perforated
double wall
• Stainless steel drain pan in evaporator
section
• Pitched evaporator drain pan
Communication Interface
• Filter rack only (no filters)
• High efficiency throwaway filters
• 90-95 percent bag filters
• 90-95 percent cartridge filters
• Final filters
• Barometric relief
• 50 percent modulating exhaust with
forward-curved fans
• Trane’s air quality (Traq™) sensor
• Modulating Gas Heat
• 10 year limited warranty on Full
Modulation Gas Heat
• 100 percent modulating exhaust with
forward-curved fans
• 100 percent modulating exhaust with
FC fans and Statitrac™ direct space
sensing building pressurization control
• High duct temperature thermostats
• 0 F low ambient control
• 0-100 percent modulating fresh air
economizer
• Ultra low leak dampers for 0-100
percent modulating fresh air
economizers
• Dual electrical power connection
• Two-inch spring fan isolation
(20 to 75 tons)
• High efficiency motors
• U-frame motors
• Oversized motors
• Through the door non-fused
disconnect with external handle
• Electrical convenience outlet
• Power supply monitoring
• Correction capacitors
• Horizontal or Roof discharge w/gas
heat (20-75 tons “F” style units only)
Field Installed Accessories
• Roof curbs
• Programmable sensors with night set
back — CV and VAV
• Sensors without night set back — CV
and VAV
• Remote zone sensors — used for
remote sensing with remote panels.
• ICS zone sensors used with Tracer™
system for zone control
• Outdoor temperature sensor for units
without economizers
• Remote minimum position control for
economizer
• Field installed module kits available for
field upgrade of controls
Note: LonTalk and LonWorks are registered trademarks of Echelon Corporation.
RT-PRC010-EN4
Features and
Benefits
Features Summary
IntelliPak™ rooftop features make
installation and servicing easy and
reliable operation a reality.
Installation Ease
• Factory-installed/commissioned
controls
—ease of start up
—single twisted wire pair
—communication for ICS interface
—full unit points access, no field wir-
ing of required points
• Unit mounted Human Interface Panel
standard
—user friendly keypad — edit
parameters
— through the access door interface
— start up adjustments
— unit mounted and remote in-
terface panel key pads are
identical
• Unit mounted lifting lugs facilitate
installation and can be used as unit
tiedown points.
Easy to Service
• The microprocessor unit controls
coordinates the operation of the
rooftop with quality, industry-accepted
components for service ease.
• Unit mounted Human Interface Panel
standard
— user friendly keypad — edit pa-
rameters
— through the access door interface
— start up adjustments
— unit mounted and remote interface
panel key pads are identical
• Modularity of unit control design
—individual replaceable functional
boards
• Advanced diagnostics
Reliability
• Advanced diagnostics
• Microprocessor controls
• Built-in safeties
• Modular control design
• UL approval as standard
• Forward-curved supply and exhaust
fans are Trane designed and factory
balanced.
• Fully insulated and gasketed panels
reduce ambient air infiltration.
• Fixed-speed evaporator fan and
exhaust drive for smooth fan operation
and belt durability.
• 200,000 average life fan bearings
enhance unit durability.
• Gas heater with free-floating stainless
steel heat exchanger relieves the
stresses of expansion and contraction.
Stainless steel provides corrosion
resistance through the entire material
thickness.
• Integral condenser subcooler improves
efficiency while helping avoid liquid
flashing.
• Factory-wired and commissioned
controls assure efficient and reliable
rooftop operation.
• Trane Scroll compressors are used on
20 to 130 ton units. They are designed
for tough industrial operation and
meet demanding operating conditions
both in efficiency and reliability.
• Roll-formed construction enhances
cabinet integrity and assures a
leakproof casing.
• Three-phase, direct-drive condenser
fan motors enhance dependability and
increase rooftop life.
• Trane industrial quality evaporator
and condensing coils help increase
rooftop life.
Application Flexibility
• Modularity in design
• Increased offering of standard options
• Generic BAS interface
• Five factory preset/re-definable in the
field ventilation override sequences
• Superior Tracer™ interface for ICS
applications
— factory-installed Trane
• Superior LonTalk interface for Tracer
and 3rd party applications
— factory-installed LonTalk
Communication Interface
• Unit mounted or Remote Human
Interface panels
— all parameter are editable from the
Human Interface Panel
• Comparative enthalpy, Reference
enthalpy, or Dry bulb control for
economizers
• Statitrac™ direct space building
pressure control
• Compensated outdoor air control —
IAQ
• Factory-installed filter rack includes
two-inch throwaway filters.
• CV controls stage both compressors
and heat based on space
requirements.
• Variable Frequency Drives (VFD)
Included With or Without Bypass
Control for Supply and Exhaust Fans.
• An array of heating options are
available, including Steam, Hot Water,
Electric and Natural Gas heat. The Gas
Heating option provides a choice of
two-stage gas heat, as well as full and
limited modulating gas heat.
5RT-PRC010-EN
Integrated
Rooftop
Systems:
Profitable,
Simple
Trane integrated rooftop systems make
design and installation of building
management systems cost effective and
easy. Trane offers two choices for
building management controls: Tracer
Building Automation System with a
Trane Control Interface (TCI) or Tracer
with LonTalk® Communication Interface
(LCI).
Integrated
Comfort with
Trane Tracer™
TCI
The Tracer TCI Integrated Comfort™
System (ICS) improves job profit and
increases job control by combining Trane
rooftop units with the Trane Tracer
building management system. This
integrated system provides total building
comfort and control. Some of the
primary motivations for building
owners/managers in deciding to
purchase a HVAC controls system is
energy savings, cost control, and the
convenience of facility automation.
Simplifying the Comfort System
Trane’s technology and innovation brings
more capabilities, more flexibility, and at
the same time, offers equipment and
systems that are easy to use, easy to
install, commission, and service. The
Tracer TCI Integrated Comfort system
saves time and money by simplifying
system design and system installation.
When used with Trane’s DDC/VAV boxes
(or VariTrane™), system balancing
almost goes away because each VAV box
is commission and tested before it
leaves the factory. All the status
information and editing data from the
Features and
Benefits
rooftop units, VAV boxes, lighting,
exhaust and other auxiliary equipment is
available from Tracer TCI for control,
monitoring and service support of your
facility. Tracer, a family of building
automation products from Trane, is
designed with robust, application
specific software packages to minimize
custom programming requirements and
enable system setup and control
through simple editing of parameters in
the standard applications software.
Should you select an Integrated Comfort
system for your facility, the
accountability for equipment,
automation and controls is Trane’s,
Trane’s, and Trane’s!
The IntelliPak
Integrated Comfort system, provides
powerful maintenance monitoring,
control and reporting capabilities. The
Tracer places the rooftop in the
appropriate operating mode for
operation for: system on/off, night
setback, demand limiting , setpoint
adjustment based on outside
parameters and much more. Up to 56
different unit diagnostic conditions can
be monitored through Tracer to let you
know about things like: sensor failures,
loss of supply airflow, and a compressor
trip out. Further, the addition of Building
Management Network software offers
remote scanning, automatic receipt of
alarms, and easy dial-up access to over
100 various Tracer sites across town or
across the country.
Typical points available through Tracer:
IntelliPak Rooftops monitoring points
available through Tracer
• all active Rooftop diagnostics
• history of last 20 unit diagnostics
• all system setpoints
• system sensor inputs
• supply fan mode and status
• inlet guide vane position/VFD speed
• unit heat/cool mode
• exhaust fan status
• exhaust damper position
• economizer position, minimum
position setpoint, economizing
setpoint
• on/off status of each compressor
• refrigerant evaporator and saturated
condenser temperatures
• hydronic heat valve position
rooftop, as a part of an
• electric heat stage status
• ventilation override mode status
Tracer control points for IntelliPak
Rooftops
• cooling and heating setpoints
• zone setpoint offsets for use with
demand limiting
• VAV discharge air setpoints
• supply air pressure setpoint
• space pressure setpoint
• zone and outdoor temperature values
• cooling and heating enable/disable
• economizer enable/disable
• economizer setpoint
• economizer minimum position
• activation of ventilation override
modes
• diagnostics reset
• unit priority shutdown
IntelliPak Rooftops setup and
configuration information through Tracer
• supply fan mode
• configuration of supply air reset
• ventilation override mode
configuration
• default system setpoint values
• sensor calibration offsets
Interoperability
with LonTalk
The Trane Tracer LonTalk Control
Interface (LCI) for IntelliPak offers a
building automation control system with
outstanding interoperability benefits.
LonTalk, which is an industry standard, is
an open, secure and reliable network
communication protocol for controls,
created by Echelon Corporation and
adopted by the LonMark Interoperability
Association. It has been adopted by
several standards, such as: EIA-709.1, the
RT-PRC010-EN6
Features and
Benefits
Electronic Industries Alliance (EIA)
Control Network Protocol Specification
and ANSI/ASHRAE 135, part of the
American Society of Heating,
Refrigeration, and Air-Conditioning
Engineer’s BACnet control standard for
buildings.
Interoperability allows application or
project engineers to specify the best
products of a given type, rather than one
individual supplier’s entire system. It
reduces product training and installation
costs by standardizing communications
across products. Interoperable systems
allow building managers to monitor and
control IntelliPak equipment with a Trane
Tracer Summit or a 3
automation system. It enables
integration with many different building
controls such as access/intrusion
monitoring, lighting, fire and smoke
devices, energy management, and a
wide variety of sensors (temperature,
pressure, light, humidity, occupancy,
CO2 and air velocity). For more
information on LonMark, visit
www.lonmark.org or Echelon,
www.echelon.com.
rd
party building
Optimum
Building
Comfort Control
The modular control design of the UCM
allows for greater application flexibility.
Customers can order exactly the options
required for the job, rather than one
large control package. Unit features are
distributed among multiple field
replaceable printed circuit boards. The
Trane UCM can be set up to operate
under one of three control applications:
1 stand-alone
2 interface with Trane’s Tracer™ building
management system
3 interface with a generic (non-Trane)
building management system. All
setup parameters are preset from the
factory, requiring less start-up time
during installation.
The unit mounted Human Interface and
the Remote Human Interface Panels’
functions are identical, except for the
Service mode is not available on the
Remote Human Interface Panel. This
common interface feature requires less
time for building maintenance personnel
to learn to interact with the unit. All of the
rooftop’s control parameters are
adjustable and can be set up through the
Remote Human Interface Panel such as,
but not limited to: system on/off,
demand limiting type, night setback
setpoints, and many other setpoints. No
potentiometers are required for setpoint
adjustment, all adjustments are done
through the Remote Human Interface
keypad. Also up to 56 different rooftop
diagnostic points can be monitored
through the human interfaces such as:
sensor failures, loss of supply airflow,
and compressor trip. No special tools are
required for servicing of the unit. All
diagnostic displays are available in clear
English at the Remote Human Interface
and will be held in memory, so that the
operator/servicer can diagnose the root
cause of failures.
Statitrac™ Direct Space
Building Pressurization Control
Trane’s Statitrac™ control is a highly
accurate and efficient method of
maintaining building pressure control
with a large rooftop air conditioner.
The efficiency is achieved with a 100
percent modulating exhaust system with
two forward-curved fans with
modulating discharge dampers that
operate only when needed, compared to
some systems that operate continually.
And most of the operating hours of the
100 percent modulating exhaust system
are at part load, saving more energy.
Trane’s Statitrac, with the 100 percent
modulating exhaust system, provides
comfort and economy for buildings with
large rooftop air conditioning systems.
Statitrac control is simple! The space
pressure control turns the exhaust fans
on and off as required and modulates
exhaust dampers to maintain space
pressure within the space pressure dead
band. Using the unit mounted Human
Interface Panel you can
1) adjust space pressure setpoint
2) adjust space pressure dead band
3) measure and read building space
pressure. The modulating exhaust
system maintains the desired building
pressure, saving energy while keeping
the building at the right pressure. Proper
building pressurization eliminates
annoying door whistling, doors standing
open, and odors from other zones.
The Statitrac™ direct space building
control sequence will be maintained
when a variable frequency drive is used.
Fans With Inlet Guide Vanes
Trane’s forward curved fans (20 through
75 tons) and air foil fans (90 through 130
tons) with inlet guide vanes pre-rotate
the air in the direction of the fan wheel,
decreasing static pressure and
horsepower, essentially unloading the
fan wheel. The unloading characteristics
result in superior part load performance.
Variable Frequency Drives
(VFD)
Variable Frequency Drives are factory
installed and tested to provide supply/
exhaust fan motor speed modulation.
VFD’s, as compared to inlet guide vanes
or discharge dampers, are quieter, more
efficient, and are eligible for utility
rebates. The VFD’s are available with or
without a bypass option. Bypass control
will simply provide full nominal airflow
in the event of drive failure.
7RT-PRC010-EN
Features and
Benefits
Trane 3-D™ Scroll Compr essor
Simple Design with 70% Fewer Par ts
Fewer parts than an equal capacity
reciprocating compressor means
significant reliability and efficiency
benefits. The single orbiting scroll
eliminates the need for pistons,
connecting rods, wrist pins and valves.
Fewer parts lead to increased reliability .
Fewer moving parts, less rotating mass
and less internal friction means greater
efficiency than reciprocating
compressors.
The Trane 3-D S croll provides impor tant
reliability and efficiency benefits. The 3-D
Scroll allows the orbiting scrolls to touch
in all three dimensions, forming a
completely enclosed compression
chamber whic h leads to increased
efficiency . In addition, the orbiting scrolls
only touch with enough force to create a
seal; there is no wear between the scroll
plates. The fixed and orbiting scrolls are
made of high strength cast iron which
results in less thermal distortion, less
leakage, and higher efficiencies. The
most outstanding feature of the 3-D
Scroll compressor is that slugging will
not cause failure. In a reciprocating
compressor, however , the liquid or dir t
can cause serious damage.
Low T orque Variation
The 3-D Scroll compressor has a very
smooth compression cycle; torque
variations are only 30 percent of that
produced by a reciprocating compressor.
This means that the scroll compressor
imposes very little stress on the motor
resulting in greater reliability. Low torque
variation reduces noise and vibration.
Suction Gas Cooled Motor
Compressor motor efficiency and
reliability is further optimized with the
latest scroll design. Cool suction gas
keeps the motor cooler for longer life and
better efficiency.
Proven Design Through T esting and
Research
With over twenty years of development
and testing, Trane 3-D S croll
compressors have undergone more
than 400,000 hours of laboratory testing
and field operation. This work combined
with over 25 patents makes Trane the
worldwide leader in air conditioning
scroll compressor technology .
One of two matched scroll plates — the
distinguishing feature of the scroll
compressor.
Chart illustrates low torque variation of
3-D Scroll compressor vs reciprocating
compressor.
RT-PRC010-EN8
Application
Considerations
EXHAUST AIR OPTIONS
When is it necessary to provide building
exhaust? Whenever an outdoor air
economizer is used, a building generally
requires an exhaust system. The purpose
of the exhaust system is to exhaust the
proper amount of air to prevent over or
underpressurization of the building. The
goal is to exhaust approximately 10
percent less air than the amount of
outside air going into the building. This
maintains a slightly positive building
pressure.
A building may have all or part of its
exhaust system in the rooftop unit. Often,
a building provides exhaust external to
the air conditioning equipment. This
external exhaust must be considered
when selecting the rooftop exhaust
system.
IntelliPak™ Rooftop units offer four types
of exhaust systems:
1
100 percent modulating exhaust with
Statitrac™ direct space sensing building
pressurization control (with or without
variable frequency drives).
2
100 percent modulating exhaust without
Statitrac.
3
50 percent power exhaust.
4
Barometric relief dampers.
Application Recommendations
1
100 per cent modulating exhaust with
Statitrac™ contr ol
For both CV and VAV rooftops, the 1 00
percent modulating exhaust discharge
dampers (or VFD) are modulated in
response to building pressure. A
differential pressure control system,
called Statitrac™, uses a dif ferential
pressure transducer to compare indoor
building pressure to atmospheric
pressure. The FC exhaust fan is turned on
when required to lower building static
pressure to setpoint. The Statitrac control
system then modulates the discharge
dampers (or VFD) to control the building
pressure to within the adjustable,
specified dead band that is set at the
Human Interface Panel.
Advantag es of the Statitrac™
100 per cent modulating exhaust
system are:
a
The exhaust fan runs only when needed
to lower building static pressure.
b
Statitrac compensates for pressure
variations within the building from
remote exhaust fans and makeup
air units.
c
The exhaust fan discharges in a single
direction resulting in more efficient fan
operation compared to return fan
systems.
d
Because discharge dampers modulate
the airflow, the exhaust fan may be
running unloaded whenever the
economizer dampers are less than 100
percent open.
With an exhaust fan system, the supply
fan must be sized to pull the return air
back to the unit through the return
system during non-economizer
operation. However, a supply fan can
typically overcome return duct losses
more efficiently than a return air fan
system. Essentially, one large fan by itself
is normally more efficient than two fans
in series because of only one drive loss
not two as with return air systems.
The reason for either a return air fan or
an exhaust fan is to control building
pressure. The Trane 100 percent
modulating exhaust system with
Statitrac does a better job controlling
building pressure than return fans simply
because 100 percent modulating exhaust
discharge dampers (or VFD) are
controlled directly from building
pressure, rather than from an indirect
indicator of building pressure such as
outdoor air damper position.
The 100 percent modulating exhaust
system with Statitrac may be used on
any rooftop application that has an
outdoor air economizer . However , when
most exhaust is handled external to the
rooftop or when building pressure is not
critical, one of the other less expensive
methods of exhaust may be used.
9RT-PRC010-EN
Application
Considerations
2
100 P ercent Exhaust S yst em
Competitive rooftops use a return air fan
system for controlling the amount of
exhaust air during economizer
operation. The return fan is in series with
the supply fan and must operate
whenever the supply fan is operating.
During economizer operation, the
economizer outdoor air dampers control
the position of the return and exhaust air
dampers, to exhaust the proper amount
of air. The disadvantage of a return air
fan is that it runs continuously, versus an
exhaust fan system which runs only
when needed to lower or maintain
building static pressure. Also, the return
fan must discharge air in two directions,
through the return air dampers and/or
exhaust air dampers, resulting in less
efficient operation compared to an
exhaust fan.
The IntelliPak™ R ooftop unit of fers
modulating 100 percent exhaust system.
This fan system has performance
capabilities equal to the supply fan. The
FC exhaust fans are started by the
economizer’s outdoor air damper
position and the exhaust dampers track
the economizer outdoor air damper
position. The amount of air exhausted by
this fan is controlled by modulating
discharge dampers at the fan outlet. The
discharge damper position is controlled
by a signal that varies with the position
of the economizer dampers. When the
exhaust fans start, the modulating
discharge dampers are fully closed, and
exhaust airflow is 15 to 20 percent of
total exhaust capabilities.
3
50 Percent Exhaust Syst em
The 50 percent exhaust system is a
single FC exhaust fan with half the air moving capabilities of the supply fan
system. The experience of The T rane
Company is that a non-modulating
exhaust system selected for 40 to 50
percent of nominal supply CFM can be
applied successfully.
The 50 percent exhaust system generally
should not be selected for more than 40
to 50 percent of design supply airflow.
Since it is an on/off nonmodulating
system, it does not vary exhaust CFM
with the amount of outside air entering
the building. Therefore, if selected for
more than 40 to 50 percent of supply
airflow, the building may become underpressurized when economizer operation
is allowing lesser amounts of outdoor air
into the building. If, however , building
pressure is not of a critical nature, the
non-modulating exhaust system may be
sized for more than 50 percent of design
supply airflow.
4
Barometric Relief D ampers
Barometric relief dampers consist of
gravity dampers which open with
increased building pressure. As the
building pressure increases, the pressure
in the unit return section also increases,
opening the dampers and relieving air.
Barometric relief may be used to provide
relief for single story buildings with no
return ductwork and exhaust
requirements less than 25 percent.
Figure AC-1 — Plan View of Modulating 100 P ercent Exhaust S yst em
RT-PRC010-EN10
Application
Considerations
Horizontal Disc harg e
The typical rooftop installation has both
the supply and return air paths routed
through the roof curb and building roof.
However, man y roof top installations
require horizontal supply and/or return
from the rooftop because of a building’s
unique design or for acoustic
considerations.
T rane has two w ays to accomplish
horizontal supply and/or return. The first
applies to all IntelliPak™ Rooftop units.
Special field supplied curbs are installed
that use the unit’s standard discharge
and return openings. The supply and
return air is routed through the curb to
horizontal openings on the sides of the
curb. The second method available for
20 - 75 tons SXHF, SFHF, SLHF, SSHF, and
90 - 130 tons SXHG, SLHG and SSHG
design units ONLY. With this method the
standard discharge and return openings
are blocked in the field. Access panels
are removed as indicated in Figures A C-1
and A C-2. These openings are used for
the discharge and return. No special
curb is needed.
SXHF, SFHF, SLHF, SSHF Units
Figure A C-1 is a simplified sketc h of the
rooftop showing which panels can be
used for horizontal supply and/or return.
To supply air horizontally , the panels that
normally house the heat accessory
controls (Panel A) and the g as heat
barometric dampers (Panel B) can be
removed and either of the openings
Note: Cannot remove Panel A
for horizontal discharge on
SFHF, SLHF, SSHF Units.
used as a unit discharge (see note 1). To
return air horizontally , the exhaust fan
access door (Panel C) can be removed
and used as a return opening. T ables A C1, 2 and 3 show dimensions for those
panels.
Horizontal Disc har ge on SXHF, SFHF,
SLHF and SSHF Rooftops (20 to 75 tons)
The SXHF (extended casing cooling
only), SFHF (gas heat), SSHF (steam
heat) and SLHF (hot water heat) rooftops
can be field modified to supply and
return air horizontally without the use of
a horizontal supply/return curb.
To supply air horizontally on SXHF only ,
the panels that normally house the heat
accessory controls (Panel A) and the g as
heat barometric dampers (Panel B) can
be removed and either of the openings
used as a unit discharge. To return air
horizontally , the exhaust fan access door
(Panel C) can be removed and used as a
return opening.
1. For horizontal discharge on SFHF, SLHF and SSHF
units, only the Panel B can be removed. Panel A
cannot be used due to the location of the heating
coils.
2. For horizontal discharge on SFHF (gas heat) models,
the block off under the heater must be removed.
After removal, a support must be added for the drain
tube.
3. Supply and Return Base openings must be covered
when converting to a horizontal configuration.
Tabl e AC-1 — SXHF, SFHF, SSHF, SLHF —
Panel A and B Dimensions
1. Add an extra 0.20-inches pressure drop to the supply external static to account for the extra turn the air is making.
2. The openings all have a 1.25-inch lip around the perimeter to facilitate ductwork attachment.
3. If exhaust fans are being used, provisions should be made for access to the exhaust components, since the access door is now being used as a return.
4. Use the dimensions provided and the supply Cfm to calculate the velocity (ft/min) through the openings to be sure they are acceptable.
Figure AC-3 is a simplified sketc h
showing which panels can be used for
horizontal supply and/or return. On 90 to
130 ton units, only one side of the
extended casing may be used for
horizontal supply because of the
location of the unit control panel. There
are, however, on SXHF models two
panels (Panels A) on the side opposite
the control box which can be removed
along with the vertical support whic h
separates the two. Removal of the
vertical support is optional, but will
ensure maximum airflow. On SLHG,
SSHG models only one of the Panel A’s
may be used for horizontal supply
Figure AC-3 — Horizontal Dischar ge P anel Dimensions — 90 - 130 Tons SXHG, SLHG, SSHG Units
because of the location of the heating
coil. Horizontal return is accomplished in
much the same way as on S*HFs by
removing the exhaust fan access door
(Panel B). See Tables A C-4 and 5 for
S*HG panel dimensions.
When using an IntelliPak™ Rooftop for
horizontal supply and return, an
additional pressure drop must be added
to the supply external static to account
for the 90 degree turn the air is making.
This additional pressure drop depends
on airflow and rooftop size, but a range
of 0.10 inc hes to 0.30 inches can be
expected. The openings on the rooftop
all have a one inch lip around the
perimeter to facilitate ductwork
attac hment. If exhaust fans are being
used on an IntelliPak Rooftop unit with
horizontal return, provisions should be
made for access to the exhaust
components, since the access door
opening is now being used as a return.
Perhaps the return ductwork attac hment
to the rooftop can include a section of
removable duct. Use the dimensions
provided and the supply and exhaust
CFM to calculate the velocity (ft/min)
through the openings.
Horizontal Dischar g e SXHG, SLHG,
SSHG Rooftops (90 to 130 t ons)
The SXHG, SLHG, SSHG rooftops can be
field modified to supply and return air
horizontally without the use of a
horizontal supply/return curb.
To supply air horizontally , use Panel A
only. The Panel on the opposite side
cannot be used due to the location of the
unit control Panel. SXHG rooftop air
conditioners do not have a panel
configuration like the 20 to 75 ton
rooftops. To achieve maximum airflow,
vertical support can be removed af ter the
unit has been placed on the roof curb. It
is secured by four screws. (See Note 1)
For horizontal disc harge on SLHG and
SSHG units, only the Panel A next to the
condenser fan section can be removed.
The other Panel A next to the supply fan
cannot be used due to the location of the
heating coils.
To return air horizontally, the exhaust fan
access door (Panel B) can be removed
and used as a return opening.
Note:
1. SXHG units have two Panel A’s that can be removed. Once unit is installed, panel(s) and the 61/2” vertical
support channel in between may be removed.
Table AC-4 — SXHG, SLHG, SSHG —
Panel A and B Dimensions
Panel H (in.)W (in.)(in.2)(ft2)
A72.727.5199913.9
B72.734.5250817.4
Notes:
1. Add an extra 0.20-inches pressure drop to the
supply external static to account for the extra turn
the air is making.
2. The openings all have a 1.25-inch lip around the
perimeter to facilitate ductwork attachment.
Total Area (H X W)
Table AC-5 — SXHG, SLHG, SSHG —
X, Y and Z Dimensions
ModelX (in.)Y (in.)Z (in.)
S*HG 90-13069.077.8244.7
* = X, L, or S
3. If exhaust fans are being used, provisions should
be made for access to the exhaust components,
since the access door is now being used as a
return.
4. Use the dimensions provided and the supply Cfm
to calculate the velocity (ft/min) through the
openings to be sure they are acceptable.
RT-PRC010-EN12
Application
Considerations
High Capacity Evaporat or Coil
Rooftops are popular because of their
“pac kaged” nature. Everything needed
is contained in one box; mix-matc hing is
neither necessary nor available. With this
convenience comes some
disadvantages; one is the rooftop’s
cooling capacity may not exactly match
the building load. It is conceivable that a
50 ton rooftop would need to be used on
an application that is 41 tons, simply
because the 40 ton rooftop does not
meet capacity.
In order to avoid such occur rences, and
to more closely match the roof top’s
capacity to the building load, a high
capacity evaporator coil option is
available on all IntelliPak™ R ooftops 20
to 105 tons. These high capacity coils
have an increased number of evaporator
coil rows as compared to standard and
enhanced evaporator tube surfaces,
resulting in a higher capacity. Capacity
tables for both standard and high
capacity coils are available in the cooling
data section of this catalog. See T able
PD-43 for the pressure drops associated
with the high capacity coil option. This
pressure drop should be added to the
total static pressure used to size the
supply fan motor.
Low Ambient Operation — Human
Interface Recommendations
Who wants to be on a roof at sub-zero
temperatures? W e can understand a
service technician’s reluctance to do this;
that’s why we recommend using a
remote mounted Human Interface Panel.
The service technician can troubleshoot
and diagnose in the comfort of a
mechanical room.
Corrosiv e Atmospheres
T rane’s IntelliPak Rooftops are designed
and built to industrial standards and will
perform to those standards for an
extended period depending on the hours
of use, the quality of maintenance
performed, and the regularity of that
maintenance. One factor that can have
an adverse effect on unit life is its
operation in a corrosive environment.
When rooftops are operated in corrosive
environments, T rane recommends that
copper fins be utilized on the condenser
and/or evaporator coil. Because copper
is more resistant to corrosion than
aluminum, coil life expectancy is greatly
increased. Some industry applications
expose equipment to corrosive agents
that even copper cannot fully resist. For
those special applications, a baked
phenolic resin coating (i.e. Heresite) is
highly desirable. Baked phenolic
coatings or copper fins on the condenser
and/or evaporator coils are available on
T rane’s IntelliPak Rooftops.
V entilation Ov er r ide Sequences
One of the benefits of using an exhaust
fan rather than a return fan, in addition
to the benefits of lower energy usage
and improved building pressurization
control, is that the rooftop can be used
as part of a ventilation override system.
Several types of sequences can be easily
done when exhaust fans are a part of the
rooftop system.
What would initiate the ventilation
override control sequence? Typically, a
manual switch is used and located near
the fire protection control panel. This
enables the fire department access to the
control for use during or after a fire. It is
also possible to initiate the sequence
from a field-installed automatic smoke
detector. In either case, a contact closure
begins the ventilation override control
sequence. CAUTION!: The ventilation
over r ide syst em should not be used to
signal the presence of smoke caused b y
a fire.
T rane can pro vide five (5) different
ventilation override sequences on both
CV and VAV IntelliP ak Roof tops. For your
convenience the sequences can be
factory preset or fully field editable from
the Human Interface Panel or T racer™.
Any or all five sequences may be
“loc ked” in by the user at the Human
Interface Panel.
The user can customize up to five (5)
different over ride sequences for
purposes such as smoke control. The
following parameters within the unit can
be defined for each of the five
sequences:
• Supply Fan — on/off
• Inlet Guide Vanes — open/closed/
controlling
• Variable Frequency Driv es — on (60
Hz)/off (0 Hz)/controlling
Compressors and condenser fans are
shut down for any V entilation Override
sequence. Factory preset sequences
include unit Off, Exhaust, P urge, Purge
with duct pressure control, and
Pressurization. Any of the user-defined
V entilation Override sequences can be
initiated by closing a field supplied
switch or contacts connected to an input
on the Ventilation Override Module. If
more than one ventilation override
sequence is being requested, the
sequence with the highest priority is
initiated. Refer to the Sequence of
Operation provided in the Control
section of this catalog for more details
on each over ride sequence.
Natural Gas Heating Considerations
The IntelliPak standard, or limited
modulation, gas heat exchangers are not
recommended for applications with
mixed air conditions entering the heat
exchanger below 50°F. Mixed air
temperatures below 50°F can cause
condensation to form on the heat
exchanger , leading to premature failure.
13RT-PRC01 0-EN
Application
Considerations
For increased reliability , the
recommendation in these applications is
full modulation gas heat. For airflow
limitations and temperature rise across
the heat exchanger information, see
Table PD-24, 25 and RT-EB-104.
Acoustical Considerations
The ideal time to make provisions to
reduce sound transmission to the space
is during the project design phase.
Proper placement of rooftop equipment
is critical to reducing transmitted sound
levels to the building. The most
economical means of avoiding an
acoustical problem is to place any
rooftop equipment away from
acoustically critical area. If possible,
rooftop equipment should not be located
directly above areas such as: of fices,
conference rooms, executive office areas
and classrooms. Ideal locations are
above corridors, utility rooms, toilet
facilities, or other areas where higher
sound levels are acceptable.
Several basic guidelines for unit
placement should be followed to
minimize sound transmission through
the building structure:
1
Never cantilever the condensing section
of the unit. A structural cross member
must support this end of the unit.
2
Locate the unit’s center of gravity close
to or over a column or main support
beam to minimize roof deflection and
vibratory noise.
3
If the roof structure is very light, roof
joists should be replaced by a structural
shape in the critical areas described
above.
4
If several units are to be placed on one
span, they should be staggered to
reduce deflection over that span.
It is impossible to totally quantify the
effect of building structure on sound
transmission, since this depends on the
response of the roof and building
members to the sound and vibration of
the unit components. However, the
guidelines listed above are experience
proven guidelines which will help reduce
sound transmission.
There are several other sources of unit
sound, i.e., supply fan, compressors,
exhaust fans, condenser fans and
aerodynamic noise generated at the duct
fittings. Refer to the ASHRAE
Applications Handbook, Chapter 42, 1991
edition for guidelines for minimizing the
generation of aerodynamic noise
associated with duct fittings.
T rane’s Engineering Bulletin RT-EB-80
describes various duct installation
considerations specifically addressing
indoor sound level concerns. This
bulletin includes sound power data on
T rane’s IntelliPak Rooftops 20 to 1 30 tons.
Ask your local Trane representative for
this informative engineering bulletin.
The VariT rane™ Computeriz ed Duct
Design Program can be used to analyze
the truck duct, run-out duct, VAV control
unit and terminal unit noise attenuation.
This program quantifies the airborne
sound generation that can be expected
in each terminal so that the designer can
identify potential sound problems and
make design alterations before
equipment installation.
The Trane Acoustics Program (TAP)
allows modeling of rooftop installation
parameters. The output of this program
shows the resulting indoor NC level for
the modeled installation. This program is
available from Trane’s Customer Direct
Service Network™ (C.D.S.), ask your
local Trane representative for additional
information on this program.
Clearance Requirements
The recommended clearances identified
with unit dimensions should be
maintained to assure adequate
serviceability, maximum capacity and
peak operating efficiency . A reduction in
unit clearance could result in condenser
coil starvation or warm condenser air
recirculation. If the clearances shown are
not possible on a particular job, consider
the following:
• Do the clearances available allow for
major service work such as c hanging
compressors or coils?
• Do the clearances available allow for
proper outside air intake, exhaust air
removal and condenser airflow?
• If screening around the unit is being
used, is there a possibility of air
recirculation from the exhaust to the
outside air intake or from condenser
exhaust to condenser intake?
Actual clearances which appear
inadequate should be reviewed with a
local Trane sales engineer.
When two or more units are to be placed
side by side, the distance between the
units should be increased to 150 percent
of the recommended single unit
clearance. The units should also be
staggered as shown in Figure AC-4 for
two reasons:
1
To reduce span deflection if more than
one unit is placed on a single span.
Reducing deflection discourages sound
transmission.
2
To assure proper diffusion of exhaust air
before contact with the outside air intake
of adjacent unit.
RT-PRC010-EN14
Application
Considerations
Duct Design
It is important to note that the rated
capacities of the rooftop can be met only
if the rooftop is properly installed in the
field. A well-designed duct system is
essential in meeting these capacities.
The satisfactory distribution of air
throughout the system requires that
there be an unrestricted and uniform
airflow from the rooftop discharge duct.
This discharge section should be straight
for at least several duct diameters to
allow the conversion of fan energy from
velocity pressure to static pressure.
However, when job conditions dictate
elbows be installed near the rooftop
outlet, the loss of capacity and static
pressure may be reduced through the
use of guide vanes and proper direction
of the bend in the elbow. The high
velocity side of the rooftop outlet should
be directed at the outside radius of the
elbow rather than the inside as
illustrated in Figure AC-5.
Figure AC-4 — Unit Placement
1
2
1. 20-40 ton models have only one outdoor air intake.
50 - 75 ton models have two outdoor air intakes.
2. 90-130 ton models have two outdoor air intakes on
the backside of the unit and one small air intake at
the end of the unit.
Improper
Figure AC-5 — Duct Design
Proper
15RT-PRC01 0-EN
Selection
Pr ocedure
This section outlines a step-by-step
procedure that may be used to select a
T rane single-z one air conditioner . The
sample selection is based on the
following conditions:
• Return air duct neg ative static pressure
— 0.65 in wg
Electrical Charact er istics:
• V oltage/cycle/phase — 460/60/3 Unit
Accessories:
• Gas fired heat exc hanger — high heat
module
• Throwaway filters
• Economizer
• Modulating 1 00 percent exhaust/
return fan
COOLING CAP ACIT Y SELECTION
Step 1 — Nominal Unit Size Selection
A summation of the peak cooling load
and the outside air ventilation load
shows: 430 MBh + 66.9 MBh = 496.9
MBh required unit capacity. From
Table PD-9, a 50 ton unit capacity with
standard capacity evaporator coil at
80 DB/65 WB, 95 F outdoor air
temperature and 17,500 total supply cfm
is 551 MBh total and 422 MBh sensible.
Thus, a nominal 50 ton unit with
standard capacity evaporator coil
is selected.
Step 2 — Evaporator Coil Enter ing
Conditions
Mixed air dry bulb temperature
determination:
Using the minimum percent of OA (1,750
cfm ÷ 17,500 cfm = 1 0 percent),
determine the mixture dry bulb to the
evaporator.
RADB + % OA (O ADB - RADB) = 80 +
(0.10) (95 - 80) = 80 + 1.5 = 81.5 F
Approximate wet bulb mixture
temperature:
RAWB + % O A (O A WB - RA WB) = 65 +
(0.10) (7 6 - 65) = 65 + 1.1 = 66.1 F
Step 3 — Det er mine Supply Fan Mot or
Heat Gain
Having selected a nominal 50 ton unit,
the supply fan bhp can be calculated. The
supply fan motor heat gain must be
considered in final determination of unit
capacity.
Supply Air Fan
Determine unit total static pr essur e at
design supply cfm:
External Static Pressure1 .2 inc hes
Evaporator Coil0.25 inches
(Table PD-43)
Return Duct Negative0.65 inches
Static Pressure
Heat Exchanger0.31 inches
(Table PD-43)
Throwaway Filter0.10 inc hes
(Table PD-43)
Economizer w/Exhaust Fan0.12 inches
(Table PD-43)
T rane R oof Curb0.13 inches
(Table PD-43)
Unit T otal Static Pressure2.7 6 inc hes
Using total of 17,500 cfm and total
static pressure of 2.76 inches, enter Table
PD-36. T able PD-36 shows 15.3 bhp with
924 rpm.
From Chart SP-1 supply fan motor heat
gain = 46.0 MBh.
Step 4 — Det ermine T otal Required
Cooling Capacity
Required capacity = T otal peak load + O A
load + supply air fan motor heat.
Required capacity = 430 + 66.9 +
46.0 = 543 MBh (45.2 tons)
Step 5 — Det ermine Unit Capacity
From Table PD-9, unit capacity at 81 .5 DB/
66.1 WB entering the evaporator , 1 7,500
supply air cfm, 95 F outdoor ambient, is
561 MBh (45.8 tons) with 426 MBh
sensible.
Step 6 — Det ermine Lea ving Air
Temperature
Unit sensible heat capacity corrected for
supply air fan motor heat = 426 MBh - 46
MBh = 380 MBh.
Supply air dry bulb temperature
difference =
Sensible Btu =
1.085 x Supply cfm
380 MBh ÷ (1.085 x 17,500 cfm)
= 20.0 F
Supply air dry bulb = 81.5 DB - 20.0
= 61.5 F
Unit enthalpy difference =
Total Btu =
4.5 x Supply cfm
561 MBh ÷ (4.5 x 17,500 cfm) =
7.12 Btu/lb
Leaving enthalpy = h(ent WB) -
h(diff). From Table 21-1 h(ent WB) =
30.9 Btu/lb
Leaving enthalpy = 30.9 Btu/lb - 7.12
Btu/lb = 23.78 Btu/lb
Supply air wet bulb = 55.9
Leaving air temperature = 61.5
DB/55.9 WB
RT-PRC010-EN16
Selection
Pr ocedure
HEA TING CAPACITY SELECTION
Step 1 — Det er mine Air T emperat ure
Entering Heating Module
Mixed air temperature = RADB + % OA
(OADB - RADB) = 70 + (0.1 0) (0 - 70) = 63
F
Supply air fan motor heat temperature
rise = 46,000 Btu ÷ (1.085 x 17,500 cfm) =
2.42 F
Air temperature entering heating
module = 63.0 + 2.42 = 65.4 F
Step 2 — Det er mine Total Wint er Heating
Load
Total winter heating load = peak heating
load + ventilation load - supply fan
motor heat = 475 + 133 - 46.0 = 562 MBh
Electric Heating Syst em
Unit operating on 460/60/3 power supply.
From Table PD-30, kw may be selected
for a nominal 50 ton unit operating
460-volt power. The 170 kw heat module
(580.1 MBh) will satisfy the winter
heating load of 563 MBh.
Table PD-28 shows an air temperature
rise of 30.6 F for 17,500 cfm through
the 170 kw heat module.
Unit supply temperature at design
heating conditions = mixed air
temperature + air temperature rise = 65.4
F + 30.6 F = 96.0 F.
Gas Heating System (Natural Gas)
From Table PD-24 select the high heat
module (697 MBh output) to satisfy
winter heating load of 563 MBh at unit
cfm.
Table PD-26 also shows an air
temperature rise of 36.0 F for 17,500 cfm
through the heating module.
Unit supply temperature at design
heating conditions = mixed air
temperature + air temperature rise = 65.4
F + 36.0 F = 10 1.4 F.
Hot Water Heating
Assume a hot water supply temperature
of 190 F. Subtract the mixed air
temperature from the hot water
temperature to determine the ITD (initial
temperature difference).
Chart SP-1 — Fan Motor Heat
120
110
100
90
80
70
60
50
40
FAN MOTOR HEAT - MBH
30
20
10
0
0510152025303540
MOTOR BRAKE HORSE POWER
ITD = 190 F - 65.4 F = 1 25 F. Divide the
winter heating load by ITD = 563 MBh ÷
125 F = 4.50 Q/ITD.
From Table PD-31, select the low heat
module. By interpolation, a Q/ITD of 4.50
can be obtained at a gpm at 25.7.
Water pressure drop at 25.7 gpm is 0.57
ft. of water. Heat module temperature
rise is determined by:
Total Btu = ∆T
1.085 x Supply cfm
563,000 = 29.7 F
(1.085 x 17,500)
Unit supply air temperature = mixed air
temperature + air temperature rise = 65.4
+ 29.7 = 95 F.
Steam Heating System
Assume a 15 psig steam supply .
From Table PD-27, the saturated
temperature steam is 250 F. Subtract
mixed air temperature from the steam
STANDARD MOTOR
HIGH EFFICIENCY MOTOR
temperature to determine ITD. ITD = 250
F - 65.4 F = 185 F.
Divide winter heating load by ITD =
563 MBh ÷ 185 F = 3.04 Q/ITD.
From Table PD-26, select the high heat
module. The high heat module at 17,500
cfm has a Q/ITD = 5.11.
Heat module capacity, Q = ITD x Q/ITD =
185 F x 5.11 Q/ITD = 945 MBh
Heat module air temperature rise
T otal Btu
=
1 .085 x Supply cfm
945 Btu ÷ (1.085 x 17,500 cfm) = 49.8 F.
Unit supply temperature at design
conditions = mixed air temperature + air
temperature rise = 65.4 F + 49.8 F = 115 F.
17RT-PRC01 0-EN
Selection
Pr ocedure
AIR DELIVERY PROCEDURE
Supply fan performance tables include
internal resistance of rooftop. For total
static pressure determination, system
external static must be added to
appropriate component static pressure
drop (evaporator coil, filters, optional
economizer , optional exhaust fan,
optional heating system, optional
cooling only extended casing, optional
roof curb).
Supply Fan Motor Sizing
The supply fan motor selected in the
cooling capacity determination was 15.3
bhp and 924 rpm. Thus, a 20 hp supply
fan motor is selected. Enter T able PD-45
to select the proper drive. For a 50 ton
rooftop with 20 hp motor , a drive
number 9 — 900 rpm is selected.
Exhaust Fan Motor Sizing
The exhaust fan is selected based on
total return system negative static
pressure and exhaust fan cfm. Return
system negative static include return
duct static and roof curb static pressure
drop.
Return duct static pressure = 0.65 inches
T rane roof curb (Table PD-43) = 0.12
inches
Total return system negative static
pressure = 0.77 inches
Exhaust fan cfm = 12,000 cfm
From Table PD-47, the required bhp is
3.45 hp at 574 rpm. Thus, the exhaust fan
motor selected is 5 hp.
To select a drive, enter T able PD-49 for a 5
hp motor for a 50 ton unit. Drive
selection number 6 — 600 rpm.
Where altitudes are significantly above
sea level, use T ables PAF-2 and P AF-3 and
Figure P AF-1 for applicable correction
factors.
UNIT ELECTRICAL REQUIREMENTS
Selection procedures for electrical
requirements for wire sizing amps,
maximum fuse sizing, and dual element
fuses are given in the electrical service
section of this catalog.
Altitude Corr ections
The rooftop performance tables and
curves of this catalog are based on
standard air (.075 lbs/ft). If the rooftop
airflow requirements are at other than
standard conditions (sea level), an air
density correction is needed to project
accurate unit performance.
Figure P AF-1 shows the air density ratio
at various temperatures and elevations.
T rane roof tops are designed to operate
between 40 and 90 degrees Fahrenheit
leaving air temperature.
The procedure to use when selecting a
supply or exhaust fan on a rooftop for
elevations and temperatures other than
standard is as follows:
1
First, determine the air density ratio
using Figure P AF-1 .
2
Divide the static pressure at the
nonstandard condition by the air
density ratio to obtain the corrected
static pressure.
3
Use the actual cfm and the corrected
static pressure to determine the fan rpm
and bhp from the rooftop performance
tables or curves.
4
The fan rpm is correct as selected.
5
Bhp must be multiplied by the air
density ratio to obtain the actual
operating bhp.
RT-PRC010-EN18
Selection
Pr ocedure
In order to better illustrate this
procedure, the following example is
used:
Consider a 60 ton rooftop unit that is to
deliver 18,000 actual cfm at 3-inches total
static pressure (tsp), 55 F leaving air
temperature, at an elevation of 5,000 ft.
1
From Figure PAF -1, the air density ratio is
0.86.
2
Tsp = 3.0-inches / 0.86 = 3.49 inc hes tsp.
3
From the performance tables: a 60 ton
rooftop (without inlet vanes) will deliver
18,000 cfm at 3.49-inches tsp at 906 rpm
and 21 .25 bhp.
4
The rpm is correct as selected - 906rpm.
5
Bhp = 21 .25 x 0.86 = 18.3 bhp actual.
Compressor MBh, SHR, and kw should
be calculated at standard and then
converted to actual using the cor rection
factors in Table PAF-2. Apply these factors
to the capacities selected at standard cfm
so as to correct for the reduced mass
flow rate across the condenser.
Heat selections other than gas heat will
not be affected by altitude. Nominal gas
capacity (output) should be multiplied by
the factors given in Table P AF-3 before
calculating the heating supply air
temperature.
HEA TING CAPACITY SELECTION
Step 1 — Det er mine Air T emperat ure
Entering Heating Module
Mixed air temperature = RADB + % OA
(OADB - RADB) = 70 + (0.10) (0 - 70) = 63
F
Supply air fan motor heat temperature
rise = 46,000 Btu ÷ (1.085 x 1 7,500 cfm) =
2.42 F
Air temperature entering heating
module = 63.0 + 2.42 = 65.4 F
19RT-PRC01 0-EN
Model
Number
Description
S F H F C 5 5 F H A 5 5 C 6 9 D 3 0 0 1 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0
1 2 3 45 6 7 8 9 101112131415161718192021222324252627 28 29 30 31 32 33 34 35 36 37 38
DIGIT 1 — UNIT TYPE
S = Self-Contained (Packaged Rooftop)
DIGIT 2 — UNIT FUNCTION
A = DX Cooling, No Heat
E = DX Cooling, Electric Heat
F = DX Cooling, Natural Gas Heat
L = DX Cooling, Hot Water Heat
S = DX Cooling, Steam Heat
X = DX Cooling, No Heat, Extended Casing
DIGIT 3 — UNIT AIRFLOW
H = Single Zone
DIGIT 4 — DEVELOPMENT SEQUENCE
F = Sixth
DIGITS 5,6,7 — NOMINAL CAPACITY
C20 = 20 T onsC55 = 55 T ons
C25 = 25 T onsC60 = 60 T ons
C30 = 30 T onsC70 = 70 T ons
C40 = 40 T onsC75 = 75 T ons
C50 = 50 T ons
DIGIT 8 — POWER SUPPLY (See Notes)
4 = 460/60/3 XL E = 200/60/3 XL
5 = 575/60/3 XL F = 230/60/3 XL
Note: SEHF units (units with electric heat)
utilizing 208V or 230V require dual power
source.
DIGIT 9 — HEATING CAPACITY
Note: When the second digit calls for “F”
(Gas Heat), the following values apply:
Additionally , please note G and M available
ONLY on 50 Ton models and above.
H = High Heat-2-Stage P = High Heat-Full
L = Low Heat-2-Stage Modulation
0 = No HeatM = Low Heat-Full
J = High Heat-LimitedModulation
Modulation
G = Low Heat-Limited
Modulation
Note: When the second digit calls for “E”
(electric heat), the following values appl y :
D = 30 KWR = 130 KW
H = 50 KWU = 150 KW
L = 70 KWV = 170 KW
N = 90 KWW = 190 KW
Q = 110 KW
Note: When the second digit calls for ‘’L’ ’
(Hot Water) or ‘’S’ ’(Steam) Heat, one of the
following valve size values must be in Digit 9:
High Heat Coil: 1 = .50”, 2 = .75”, 3 = 1”,
4 = 1.25”, 5 = 1.5”, 6 = 2”.
Low Heat Coil: A = .50”, B = .75”, C = 1”,
D = 1.25”, E = 1.5”, F = 2”.
DIGIT 10 — DESIGN SEQUENCE
A = First (Factory Assigned)
Note: Sequence may be any letter A thru Z,
or any digit 1 thru 9.
3 = 100%, 3 HP W/Statitrac
4 = 100%, 5 HP W/Statitrac
5 = 100%, 7.5 HP W/Statitrac
6 = 100%, 10 HP W/Statitrac
7 = 100%, 15 HP W/Statitrac
8 = 100%, 20 HP W/Statitrac
A = 50%, 1.5 HP
B = 50%, 3 HP
C = 50%, 5 HP
D = 50%, 7.5 HP
E = 100%, 1.5 HP W/O Statitrac (CV Only)
F = 100%, 3 HP W/O Statitrac (CV Only)
G = 100%, 5 HP W/O Statitrac (CV Only)
H = 100%, 7.5 HP W/O Statitrac (CV Only)
J = 100%, 10 HP W/O Statitrac (CV Only)
K = 100%, 15 HP W/O Statitrac (CV Only)
L = 100%, 20 HP W/O Statitrac (CV Only)
A = Throwaway
B = Cleanable Wire Mesh
C = High-Efficiency Throwawa y
D = Bag With Prefilter
E = Cartridge With Prefilter
F = Throwaway Filter Rack Less Filter
Media
G = Bag Filter Rack Less Filter Media
DIGIT 14 — SUPPLY AIR FAN HP
1 = 3 HP4 = 10 HP7 = 25 HP
2 = 5 HP5 = 15 HP8 = 30 HP
3 = 7.5 HP6 = 20 HP9 = 40 HP
SX H G D 1 1 4 O A H 7 C F 9 D 3 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 2 3 4 5678 9 1011 12131415161718 19 20 21222324252627 282930313233343536
DIGIT 1 — UNIT TYPE
S = Self-Contained (Packaged Rooftop)
DIGIT 2 — UNIT FUNCTION
E = DX Cooling, Electric Heat
F = DX Cooling, Natural Gas Heat
L = DX Cooling, Hot Water Heat
S = DX Cooling, Steam Heat
X = DX Cooling, No Heat, Extended Casing
DIGIT 3 — UNIT AIRFLOW
H = Single Zone
DIGIT 4 — DEVELOPMENT SEQUENCE
G = Seventh
DIGITS 5,6,7 — NOMINAL CAPACITY
C90 = 90 T ons
D11 = 105 Tons
D12 = 115 Tons
D13 = 130 Tons
DIGIT 8 — POWER SUPPLY
4 = 460/60/3 XL
5 = 575/60/3 XL
E = 200/60/3 XL
F = 230/60/3 XL
DIGIT 9 — HEATING CAPACITY
0 = No Heat
H = High Heat - 2-Stage
J = High Heat - Limited Modulation
P = High Heat - Full Modulation
Note:
When the second digit calls for “E”
(electric heat), the following values apply
in the ninth digit:
W = 190 KW
When the second digit calls for ‘’L’’ or
‘’S’’, one of the following valve size
values must be in Digit 9:
High Heat Coil: 3 = 1.0”, 4 = 1.25”, 5 =
1.50”, 6 = 2.0”, 7 = 2.5”
Low Heat Coil: C = 1.0”, D = 1.25”, E =
1.50”, F = 2.0”, G = 2.5”
DIGIT 10 — DESIGN SEQUENCE
A = First (Factory Assigned)
Note: Sequence may be any letter A thru
Z, or any digit 1 thru 9.
DIGIT 11 — EXHAUST OPTION
0 = None
7 = 100%, 15 HP W/Statitrac
8 = 100%, 20 HP W/Statitrac
1. EXAMPLE: Model numbers: SFHFC55FHA55C69D3001N describes a unit with the following characteristics: DX cooling with
natural gas heating, 55 ton nominal cooling capacity, 230/60/3 power supply, high heat model. 100 percent exhaust with
Statitrac, 7.5 HP exhaust fan motor with drive selection No. 5 (500 RPM), high-efficiency throwaway filters, 20 HP supply
fan motor with drive selection No. 9 (900 RPM), 0-100% economizer, VAV supply air temperature control with inlet guide
vanes, no remote panel, standard ambient control, U.L. agency approval. The service digit for each model number
contains 38 digits; all 38 digits must be referenced.
2. EXAMPLE: Model numbers: SXHGD1140AH7CF8D3001 describes a unit with the following characteristics: DX cooling with
extended casing, no heat, 105 ton nominal cooling capacity, 460/60/3 power supply, no heat, 100 percent exhaust with
Statitrac, 30 h.p. exhaust fan motor with drive selection No. 7 — (700 RPM), high-efficiency throwaway filters, 60 hp supply
fan motor with drive selection No. 8 — (900 RPM), economizer, VAV supply air temperature control with inlet guide vanes,
no remote panel, standard ambient, UL agency approval. The service digit for each model number contains 36 digits; all 36
digits must be referenced.
3. Available as standard 460 volt only for 70 and 75 ton models.
9 = 100%, 25 HP W/Statitrac
F = 50%, 15 HP
H = 100%, 30 HP W/Statitrac
J = 100%, 40 HP W/Statitrac
K = 100%, 15 HP W/O Statitrac (CV Only)
L = 100%, 20 HP W/O Statitrac (CV Only)
M = 100%, 25 HP W/O Statitrac (CV Only)
N = 100%, 30 HP W/O Statitrac (CV Only)
P = 100%, 40 HP W/O Statitrac (CV Only)
Size (Inches)30x66x2 Row30x66x2 Row30x66x2 Row42x66x2 Row
TypeType W, Prima FloType W, Prima FloType W, Prima FloType W, Prima Flo
High Heat (Fins/Ft)110110110110
Low Heat (Fins/Ft)80808080
Number/Size/Type6/26”/Prop6/26”/Prop6/26”/Prop6/26”/Prop6/26”/Prop
Hp (Each)1.01.01.01.01.0
Cfm3660036600408004080040800
Cycle/Phase60/360/360/360/360/3
Number/Size (Nominal)2/10, 4/15 Ton6/15 Ton4/10, 4/15 Ton8/15 Ton
ModelScrollScrollScrollScroll
Unit Capacity Steps (%)100/69/38/19100/67/33/17100/70/40/20100/75/50/25
RPM3450345034503450
Evaporator Fans
Number/Size/Type2/28”/AF2/28”/AF2/28”/AF2/28”/AF
Number of Motors2222
Hp Range30-8030-8030-8030-80
Cfm Range
ESP Range — (In. WG)1.0-4.751.0-4.701.0-4.701.0-4.70
Exhaust Fans50%100%50%100%50%100%50%100%
Number/Size/Type1/22”/FC2/22”/FC1/22”/FC2/22”/FC1/22”/FC2/22”/FC1/22”/FC2/22”/FC
Hp Range1515-401515-401515-401515-40
Cfm Range12,000-20,000 28,000-40,000 12,000-20,000 28,000-40,000 12,000-20,000 28,000-40,000 12,000-20,000 28,000-40,000
ESP Range — (In. WG).25-2.5.25-2.5.25-2.5.25-2.5.25-2.5.25-2.5.25-2.5.25-2.5
3
1
Condenser Fans
Number/Size/Type8/26”/Prop.10/26”/Prop.10/26”/Prop.12/26”/Prop.
Hp (Each)1.01.01.01.0
Cfm56,40057,00060,00063,200
Cycle/Phase60/360/360/360/3
Evaporator Coil — Standard
Dimensions122.0 x 70.0122.0 x 71.25122.0 x 71.25122.0 x 71.25
Size (Ft2)59.359.359.359.3
Rows/Fin Series3/1483/1805/1485/148
T ube Diameter/Surface
Evaporator Coil — High Capacity
Dimensions122.0 x 70.0122.0 x 71.25NANA
Size (Ft2)59.359.3NANA
Hi-Capacity Rows/Fin Series5/1485/148NANA
T ube Diameter/Surface
Condenser Coil
2
)152152152152
Size (Ft
Rows/Fin Series/Tube Diameter3/144/
Electric Heat
KW190190190190
Capacity Steps:3333
Natural Gas Heat
Standard Heating -- MBh Input1000100010001000
Capacity Steps:2222
Modulating Gas Heat
Size (Inches)(2) 30x84x2 Row(2) 30x84x2 Row(2) 30x84x2 Row(2) 30x84x2 Row
T ypeT ype W , Prima FloType W, Prima FloT ype W , Prima FloType W , Prima Flo
High Heat (Fins/Ft)110110110110
Low Heat (Fins/Ft)80808080
Prefilters (For Bag & Cartridge) 3-20x24x2 3-20x24x2 3-20x24x2 3-20x24x2
Face Area (Ft
Standard Unit Min. Outside Air Temperature For Mechanical Cooling
Without Hot Gas Bypass45 F45 F45 F45 F
With Hot Gas Bypass45 F45 F45 F45 F
Notes:
1. For cfm values outside these ranges, refer to RT-EB-104.
2 Refer to Table PD-30 for availability of electric heat kw ranges by voltage.
3. 90-130 Ton models are dual circuit.
4. Max cfm for 105 Ton std is 44,000.
5 The firing rate of the unit can vary from 33% of the Heater Mbh up to the nameplate rating of the unit.
6. The firing rate of the unit can vary from pilot rate of 125,000 Btuh up to the nameplate rating of the unit.
2
)66.066.066.066.0
Table GD-4 — ARI Perfor mance D ata
ARI Performance Data
Tons Model
20SFHFC204LA**A**A*****2209.412.7
Notes:
1. This information is rated and tested in accordance with ARI Standard 360-93
for large unitary equipment up to 25 tons. These Trane products can be
found in the current ARI Directory.
2. IPLV — Integrated Part Load Value
3. This information applies to units whose design sequence (Digit 10) is “A” or
later.
2. Cfm values below the minimums and above the maximums shown in this table are not UL/CSA approved.
3. Air Temperature Rise = Heat Output (Btu) ÷ (Cfm x 1.085).
GasHeatHeatAir Temperature Rise Vs Unit Cfm
Air Temperature Rise Vs Unit Cfm
Table PD-26 — Steam Heating Capacities (Q/ITD)
20 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module40006000800010000
Low Heat0.951.1 81.371.52
High Heat1.942.472.953.31
40 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module80001200016000 20000
Low Heat1.612.012.292.60
High Heat3.364.284.935.43
60 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module120001800024000 30000
Low Heat2.322.813.333.71
High Heat3.854.845.626.18
1
25 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module500075001000012500
Low Heat1.061.331.521 .7 4
High Heat2.202.853.313.65
50 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module100001500020000 25000
Low Heat1.822.212.602.85
High Heat3.864.795.435.97
70 & 75 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module160002000024000 30000
Low Heat2.652.983.333.71
High Heat4.505.105.626.18
Table PD-27 — Properties of Steam
Steam Pressure (Psig)2510152025304050
Temperature Of Steam (F)21922723925025926727 4287298
30 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm)
Module600090001200015000
Low Heat1.181.641.692.00
High Heat2.473.123.593.95
55 Nominal Ton Unit
SteamUnit Standard Air Volume (Cfm
Module11000165002200027500
Low Heat1.912.382.722.92
High Heat4.095.015.646.41
90, 105, 115, 130 Nominal Ton Units
SteamUnit Standard Air Volume (Cfm)
Module2700033000 40000 46000
Low Heat5.175.706.196.53
High Heat8.838.809.049.26
Note:
1. Capacities expressed as MBH (Q) per initial
temperature difference (ITD) between the entering
air temperature to the steam module and the
entering steam temperature. Maximum
recommended operating pressure is 35 PSIG.
41RT-PRC010-EN
P erformance
Data
Table PD-28 — 20 to 75-T ons Electr ic Heat Air Temper atur e Rise
1. Maximum permitted air temperature rise; 20-30 tons (UL — 50 F) (CSA — 60 F), 40 — 60 ton (UL/CSA — 50 F).
2. Air temperature rise = kw x 3413 ÷ (scfm x 1.085)
3. All heaters on units provide 3 increments of capacity.
4. 200 and 230 volt electric heat rooftops require dual power supplies to the control box. All other rooftops have single power connections. See Electrical Data Section for
electrical sizing information.
Table PD-29— 90 To 130-Ton Electric Heat Air T emper atur e Rise
KWT otalCfm
InputMBh240002700030000330003600040000
190648.324.922.119.918.116.515.3
Notes:
1. Air Temperature = kw x 3413 ÷ (scfm x 1.085)
2. Only available in 460/60/3 and 575/60/3 voltages.
1. Capacities expressed as MBh per initial temperature difference (ITD) between the entering air temperature to
the hot water coil and the entering water temperature. Ethylene glycol or other capacities can be determined
from the Trane heating coil computer program. Capacity and pressure drop of ethylene glycol varies greatly
with temperature and concentration.
43RT-PRC010-EN
P erformance
(20, 25 Tons)
Data
Table PD-32 — Supply Fan Performance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 20 and 25 Ton
1. Fan performance for 20 and 25 ton rooftops is identical. However, note maximum motor hp size for each size. Contact your local Trane representative for
information on oversized motors.
2. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
3. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate
component static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended
casing, optional roof curb).
4. Maximum Cfm (for UL approval) as follows: 20 Ton — 9,000 Cfm, 25 Ton — 11,000 Cfm
5. Minimum motor horsepower is 3 hp.
6. Maximum motor horsepower as follows: 20 Ton — 15 hp, 25 Ton — 15 hp
7. Maximum 3 hp and 5 hp motor Rpm is 1,100, maximum 7.5 hp to 15 hp motor Rpm is 1655.
8. See RT-EB-104 for further details
RT-PRC010-EN44
P erformance
(20, 25 Tons)
Data
Figure PD-1— Supply Fan P erf or mance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 20 and 25 Tons
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
3 HP
7.5 HP
5 HP
10 HP
20 HP
15 HP
CFM
40% wocfm
50%
S_HFC20 & 25 Ton
Dual 15 X 15 FansEntrance Losses
- without Inlet Guide Vanes
- without Evap Coil
- without Filters
- without Return Air Dampers
- without Exhaust Fan
60%
Fan Curve Limits
- Minimum MotorHP =3
- Maximum Motor HPC20 = 10 HPC25 = 15 HP
70%
- Maximum RPM3 HP- 5 HP = 1100
7.5 HP - 15 HP =1655
- Maximum CFM
80%
C20 = 9,000C25 = 11,000
- Maximum Static Pressure
90%
Leaving the Unit = 4.0" w.c.
45RT-PRC010-EN
P erformance
(20, 25 Tons)
Data
Table PD-33 — Supply Fan Performance WITH INLET VANES — 20 and 25 Tons
1. Fan performance for 20 and 25 ton rooftops is identical. However, note maximum motor hp size for each size. Contact your local Trane representative for information on
oversized motors.
2. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
3. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended casing, optional roof curb).
4. Maximum Cfm (for UL approval) as follows: 20 Ton — 9,000, Cfm 25 Ton — 11,000 Cfm.
5. Minimum motor horsepower is 3 hp.
6. Maximum motor horsepower as follows: 20 Ton — 10 hp, 25 Ton — 15 hp.
7. Maximum 3 hp and 5 hp motor Rpm is 1,100, maximum 7.5 hp to 15 hp motor Rpm is 1655.
8. See RT-EB-104 for further details
RT-PRC010-EN46
P erformance
.
s
c
Data
Figure PD-2 — Supply Fan P erf or mance WITH INLET VANES — 20 and 25 Tons
(20, 25 Tons)
8.0
1700 RPM
7.5
7.0
1600 RPM
6.5
1500 RPM
6.0
5.5
1400 RPM
5.0
4.5
1300 RPM
4.0
1200 RPM
3.5
1100 RPM
3.0
1000 RPM
2.5
STATIC PR ESSURE, Inches w.c
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
1. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended casing, optional roof curb).
3. Minimum motor horsepower is 5 hp, maximum motor horsepower is 20 hp. Maximum RPM is 1379.
4. Max Cfm (for UL approval) as follows: 30 Ton-13,500 Cfm.
5. See RT-EB-104 for further details.
RT-PRC010-EN48
P erformance
.
(30 Ton)
Data
Figure PD-3— Supply Fan P erf or mance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 30 Ton
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
3 HP
7.5 HP
5 HP
15 HP
10 HP
CFM
25 HP
20 HP
40% wocfm
S_HFC30
Dual 18 X18 FansEntrance Losses
- without Inlet GuideVanes
- without Evap Coil
- without Filters
- without ReturnAir Dampers
- without Exhaust
50%
Fan Curve Limits
- Minimum Motor HP = 5
- Maximum Motor HP = 20
- Maximum RPM = 1379
- Maximum CFM = 13,500
60%
- Maximum Static Pressure Leaving the Unit = 4.0"w.c.
70%
80%
90% w ocfm
49RT-PRC010-EN
P erformance
(30 Ton)
Data
Table PD-35 — Supply Fan Performance WITH INLET VANES — 30 Ton
1. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended casing, optional roof curb).
3. Minimum motor horsepower is 5 hp, maximum motor horsepower is 20 hp. Maximum RPM is 1379.
4. See RT-EB-104 for further details.
RT-PRC010-EN50
Performance
s
Data
Figure PD-4 — Supply Fan P erformance WITH INLET VANES — 30 Ton
(30 Ton)
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
STATIC PRESSURE, Inches w.c
2.0
1.5
1.0
0.5
0.0
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
1400 RPM
1300 RPM
1200 RPM
1100 RPM
1000 RPM
900 RPM
800 RPM
700 RPM
600 RPM
500 RPM
040008000120001600020000
5 HP
15 HP
10 HP
7.5 HP
3 HP
20 H P
CFM
25 HP
40% wocfm
S_HFC30
Dual 18 X18 FansEntrance Losses
-with Inlet Guide Vanes
-without Evap Coil
- withoutFilters
50%
-without Return AirDamper
- withoutExhaustFan CurveLimits
- Minimum MotorHP= 5
- Maximum Motor HP =20
60%
- Maximum RPM =1379
- Maximum CFM =13,500
- Maximum Static Pressure
70%
Leaving the Unit = 4.0" w.c.
80%
90% w ocfm
51RT-PRC01 0-EN
P erformance
(40, 50, 55 Tons)
Data
Table PD-36 — Supply Fan Performance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 40, 50 and 55 Tons
1. Fan performance for 40, 50, and 55 ton rooftops is
identical. However, note maximum motor hp size for
each size. Contact your local Trane representative for
information on oversized motors.
2. Shaded areas at table extremes note non-standard
Bhp or Rpm selection. Contact your local Trane
representative for more information.
3. Supply fan performance table includes internal
resistance of rooftop. For total static pressure
determination, system external static must be added
to appropriate component static pressure drops
(evaporator coil, filters, optional economizer, optional
exhaust fan, optional heating system, optional
cooling only extended casing, optional roof curb).
4. Maximum Cfm (for UL approval) as follows:
40 Ton — 18,000 Cfm
50 Ton — 22,500 Cfm
55 Ton — 24,000 Cfm
5. Minimum motor horsepower is 7.5 hp.
6. Maximum motor horsepower as follows:
40 Ton — 30 hp
50 Ton — 30 hp
55 Ton — 30 hp
7. Maximum 7.5 hp to 15 hp motor Rpm is 1,141 Rpm,
maximum 20 hp to 30 hp motor Rpm is 1,170 Rpm.
8. See RT-EB-104 for further details.
RT-PRC010-EN52
P erformance
(40, 50, 55 Tons)
Data
Figure PD-5 — Supply Fan P erfor mance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 40, 50 and 55 Tons
8.0
7.5
1200 RPM
7.0
6.5
6.0
1100 RPM
5.5
5.0
1000 RPM
4.5
4.0
900 RPM
3.5
800 RPM
3.0
2.5
STATIC PRESSURE, Inches w.c.
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
1. Fan performance for 40, 50, and 55 ton rooftops is
identical. However, note maximum motor hp size for
each size. Contact your local Trane representative for
information on non-standard motors.
2. Shaded areas at table extremes note non-standard
Bhp or Rpm selection. Contact your local Trane
representative for more information.
3. Supply fan performance table includes internal
resistance of rooftop. For total static pressure
determination, system external static must be added
to appropriate component static pressure drops
(evaporator coil, filters, optional economizer,
optional exhaust fan, optional heating system,
optional cooling only extended casing, optional roof
curb).
4. Maximum Cfm (for UL approval) as follows: 40 Ton
— 18,000 Cfm, 50 Ton — 22,500 Cfm, 55 Ton —
24,000 Cfm
5. Minimum motor horsepower is 7.5 hp.
6. Maximum motor horsepower as follows: 40 Ton —
30 hp, 50 Ton — 30 hp, 55 Ton — 30 hp
7. Maximum 7.5 hp through 15 hp motor Rpm is 1,141
Rpm, maximum 20 hp through 30 hp motor Rpm is
1,170 Rpm.
8. See RT-EB-104 for further details.
RT-PRC010-EN54
P erformance
Data
Figure PD-6 — Supply Fan P erf or mance WITH INLET VANES — 40, 50 and 55 Ton
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
7.5 HP
5 HP
15 HP
10 HP
30 HP
25 HP
20 HP
CFM
40% wocfm
40 HP
50%
60%
S_HFC40, C50,C55
Dual 20 X20 FansEntrance Losses
-with Inlet Guide Vanes
- without Evap Coil
- without Filters
- without Return Air Damper s
- without Exhaust
70%
Fan Curve Limits
-Minimum MotorHP = 7.5
-Maximum Motor HPC40 = 25 HP C50 & C55 = 30 HP
80%
- MaximumRPM
7.5 - 15 HP= 1141 20 - 30 HP= 1170
- MaximumCFMC40 = 18,000
90%
C50 = 22,500C55 = 24,000
-Maximum Static PressureLeaving the Unit= 4.0" w.c.
55RT-PRC01 0-EN
(60, 70, 75 Tons)P erformance
Data
Table PD-38— Supply Fan P erfor mance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 60, 70 and 75 Tons
1. Fan performance for 60, 70 and 75 ton rooftops are identical. However, note maximum motor hp size for each size. Contact your local Trane representative for information on
non-standard motors.
2. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
3. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended casing, optional roof curb).
4. Maximum Cfm (for UL approval) as follows: 60 Ton — 27,000 Cfm , 70 & 75 Ton — 30,000 Cfm
5. Minimum motor horsepower is 10 hp.
6. Maximum motor horsepower is 40 hp.
7. Maximum motor Rpm is 1,130.
8. See RT-EB-104 for further details.
9. 40 HP motor available as standard in 460 volt only for 70 and 75 ton models.
RT-PRC010-EN56
(60, 70, 75 Tons)Perf ormance
.
Data
Figure PD-7 — Supply Fan Performance With VARIABLE FREQUENC Y DRIVE or WITHOUT INLET VANES — 60, 70 and 75 Tons
1100 RPM
1000 RPM
1200 RPM
10 HP
7.5 HP
20 HP
15 HP
CFM
30 HP
25 HP
50 HP
40 HP
40% wocfm
S_HFC60, C70, C75
Dual 22 X 22 FansEntrance Losses
-without Inlet Guide Vanes
- withoutEvap Coil
- withoutFilters
50%
- withoutReturn Air Dampers
- withoutExhaustFan Curve Limits
- Minimum Motor HP = 10
- Maximum Motor HP =40
60%
-Maximum RPM = 1130
- Maximum CFM C60=27,000C70&C75 =30,000
70%
- Maximum Static PressureLeaving the Unit = 4.0" w.c.
80%
90% w ocfm
8.0
7.5
7.0
6.5
6.0
5.5
5.0
900 RPM
4.5
4.0
800 RPM
3.5
3.0
700 RPM
2.5
STATIC PRESSURE, Inches w.c
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
1. Fan performance for 60, 70 and 75 ton rooftops are identical. Contact your local Trane representative for information on non-standard motors.
2. Shaded areas at table extremes note non-standard Bhp or Rpm selection. Contact your local Trane representative for more information.
3. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops (evaporator coil, filters, optional economizer, optional exhaust fan, optional heating system, optional cooling only extended casing, optional roof curb).
4. Maximum Cfm (for UL approval) as follows: 60 Ton — 27,000 Cfm, 70 & 75 Ton — 30,000 Cfm
5. Minimum motor horsepower is 10 hp.
6. Maximum motor horsepower is 40 hp.
7. Maximum motor Rpm is 1,130.
8. See RT-EB-104 for further details.
9. 40 HP motor available as standard in 460 volt only for 70 and 75 ton models.
RT-PRC010-EN58
Data
e
a
1
0
s
0
Figure PD-8 — Supply Fan P erfor mance WITH INLET VANES — 60, 70 and 75 Tons
(60, 70, 75 Tons)P erformance
8.0
7.5
1100 RPM
7.0
6.5
1000 RPM
6.0
5.5
5.0
900 RPM
4.5
4.0
800 RPM
3.5
3.0
700 RPM
2.5
STATIC PRESSURE, Inches w.c.
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
1. Shaded areas indicate non-standard BHP or RPM selections. Contact your local Trane representive for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops, (evaporator coil, filters, optional economizer, optional heating system, optional roof curb).
3. Maximum static pressure leaving the rooftop is 4.0’’ H20 positive. The static pressure drops from the supply fan to the space cannot exceed 4.0’’ H20.
4. Minimum motor horsepower is 30 hp.
5. See RT-EB-104 for further details.
Figure PD-9— Supply Fan P erf or mance WITH VARIABLE FREQUENCY DRIVE or WITHOUT INLET GUIDE VANES — 90 Ton
9
1
6
0
0
R
P
M
8
1
5
0
0
R
P
M
7
1
4
0
0
R
P
M
6
1
3
0
0
R
P
M
5
1
2
0
0
R
P
M
4
1
1
0
0
R
P
M
1
0
0
Static Presure, Inches w.c.
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
0
R
P
3
2
1
0
0100002000030000400005000060000
M
9
0
0
RP
M
M
F
C
WO
%
0
4
20 HP
CFM
25 HP
M
CF
O
W
%
0
5
40
H
30
H
P
M
F
C
O
W
%
0
6
100
H
P
75
HP
60 HP
50
H
P
P
9
7
80%
M
F
C
O
W
%
0
M
F
C
O
W
M
F
C
O
W
%
0
61RT-PRC010-EN
(90 Ton)P erformance
Data
Table PD-41 — Supply Fan P erfor mance WITH INLET GUIDE VANES — 90 Ton
1. Shaded areas indicate non-standard BHP or RPM selections. Contact your local Trane representive for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops, (evaporator coil, filters, optional economizer, optional heating system, optional roof curb).
3. Maximum static pressure leaving the rooftop is 4.0’’ H20 positive. The static pressure drops from the supply fan to the space cannot exceed 4.0’’ H20.
4. Minimum motor horsepower is 30 hp.
5. See RT-EB-104 for further details.
Figure PD-10 — Supply Fan Performance WITH INLET GUIDE VANES — 90 Ton
9
8
1
6
0
0
RP
M
7
1
5
0
0
R
P
M
6
1
4
0
0
RP
M
1
3
0
0
R
P
5
4
Static Presure, Inches w.c.
3
2
1
0
0100002000030000400005000060000
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
M
1
2
0
0
R
P
M
1
1
0
0
R
P
M
1
0
0
0
R
P
M
9
0
0
R
P
M
M
F
C
O
W
%
0
4
2
0
H
CFM
M
F
C
O
W
%
0
5
3
0
H
2
P
5
H
P
P
M
CF
O
W
%
0
6
7
5
H
P
60
H
P
5
0
H
P
4
0
H
P
M
F
C
O
W
%
0
7
1
0
0
H
P
M
F
C
O
W
%
0
8
M
F
C
WO
%
0
9
63RT-PRC010-EN
(105,115,130 Tons)P erformance
Data
Table PD-42 — Supply Fan Performance WITH VARIABLE FREQUENCY DRIVE or WITHOUT INLET GUIDE VANES — 1 05, 115, 130 Ton
1. Shaded areas indicate non-standard BHP or RPM selections. Contact your local Trane representive for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate
component static pressure drops, (evaporator coil, filters, optional economizer, optional heating system, optional roof curb).
3. Maximum static pressure leaving the rooftop is 4.0’’ H20 positive. The static pressure drops from the supply fan to the space cannot exceed 4.0’’ H20.
4. Maximum Cfm as follows: 105 Ton Std. — 44,000 Cfm, 105 Hi-Cap., 115, 130 Ton — 46,000 Cfm
5. Minimum motor horsepower is 30 hp.
6. See RT-EB-104 for further details.
Figure PD-1 1— Supply Fan P erformance WITH V ARIABLE FREQUENCY DRIVE or WITHOUT INLET GUIDE VANES — 105, 1 15, 130 T ons
9
1
6
0
0
R
P
M
8
1
5
0
0
R
P
M
7
1
4
0
0
R
P
M
6
1
3
0
0
R
P
M
5
1
2
0
0
R
P
M
4
1
1
0
0
R
P
M
1
0
0
Static Presure, Inches w.c.
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
0
R
P
3
2
1
0
0100002000030000400005000060000
M
9
0
0
RP
M
M
F
C
WO
%
0
4
20 HP
CFM
25 HP
M
CF
O
W
%
0
5
40
H
P
30
H
P
M
F
C
O
W
%
0
6
100
H
P
75
HP
60 HP
50
H
P
M
F
C
O
W
%
0
7
M
F
C
O
W
80%
M
F
C
O
W
%
0
9
65RT-PRC010-EN
(105,115,130 Tons)P erformance
Data
Table PD-43— Supply Fan Performance WITH INLET GUIDE V ANES — 105,1 15,130 Tons
1. Shaded areas indicate non-standard BHP or RPM selections. Contact your local Trane representive for more information.
2. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to appropriate component
static pressure drops, (evaporator coil, filters, optional economizer, optional heating system, optional roof curb).
3. Maximum static pressure leaving the rooftop is 4.0’’ H20 positive. The static pressure drops from the supply fan to the space cannot exceed 4.0’’ H20.
4. Maximum Cfm as follows: 105 Ton Std. — 44,000 Cfm, 105 Hi-Cap., 115, 130 Tons — 46,000 Cfm
5. Minimum motor horsepower is 30 hp.
6. See RT-EB-104 for further details.
Figure PD-12 — Supply F an P erfor mance WITH INLET GUIDE VANES — 105,1 15,130 Tons
9
8
1
6
0
0
R
P
M
7
1
5
0
0
R
P
M
1
6
4
0
0
RP
M
1
3
0
0
R
P
5
4
Static Presure, In che s w. c.
3
2
1
0
0100002000030000400005000060000
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
Nominal1½ HP3 HP5 HP7½ HP15 HP
Unit SizeRPMDrive NoRPMDrive NoRPMDrive NoRPMDrive NoRPMDrive No
2060068008
2560068008
3070079009
406006 8008
50/5560068008
605005
70/755005
906006
105/115/1306006
50057007
70079009
8008
50057007
70079009
8008
60068008
80081000A
9009
50057007
7007
50057007
7007
40047007
6006
40047007
6006
5005
7007
8008
5005
7007
8008
RT-PRC010-EN74
Controls
(VAV Units)
V AV Units Only
Sequence Of Operation
NOTE: When noted in this sequence
“Human Interface Panel,” the reference is
to both the unit mounted and remote
mounted Human Interface Panel. All
setpoint adjustments can be
accomplished at the unit or Remote
Human Interface Panel.
1
Supply Air Pressure Contr ol
Inlet Guide V anes Contr ol
Inlet guide vanes are driven by a
modulating 0-10 vdc signal from the
Rooftop Module (RTM). A pressure
transducer measures duct static
pressure, and the inlet guide vanes are
modulated to maintain the supply air
static pressure within an adjustable user defined range. The range is determined
by the supply air pressure setpoint and
supply air pressure deadband, which are
set through the Human Interface Panel.
Inlet guide vane assemblies installed on
the supply fan inlets regulate fan
capacity and limit horsepower at lower
system air requirements. When in any
position other than full open, the vanes
pre-spin intake air in the same direction
as supply fan rotation. As the vanes
approach the full-closed position, the
amount of “spin” induced by the vanes
increases at the same time that intake
airflow and fan horsepower diminish.
The inlet guide vanes will close when the
supply fan is shut down, except during
night setback.
V ar iable F requency Dr iv e (VFD) Control
Variable frequency drives are driven by a
modulating 0-10 vdc signal from the
Rooftop Module (RTM). A pressure
transducer measures duct static
pressure, and the VFD is modulated to
maintain the supply air static pressure
within an adjustable user -defined range.
The range is determined by the supply
air pressure setpoint and supply air
pressure deadband, which are set
through the Human Interface Panel.
Variable frequency drives provide supply
fan motor speed modulation. The drive
will accelerate or decelerate as required
to maintain the supply static pressure
setpoint. When subjected to high
ambient return conditions the VFD shall
reduce its output frequency to maintain
operation. Bypass control is offered to
provide full nominal airflow in the event
of drive failure.
Supply Air Static Pr essur e Limit
The opening of the inlet guide vanes and
VAV boxes are coordinated during unit
start up and transition to/from Occupied/
Unoccupied modes to prevent
overpressurization of the supply air
ductwork. However, if for an y reason the
supply air pressure exceeds the user defined supply air static pressure limit
that was set at the Human Interface
Panel, the supply fan/VFD is shut down
and the inlet guide vanes (if included) are
closed. The unit is then allowed to restart
three times. If the overpressurization
condition occurs on the third time, the
unit is shut down and a manual reset
diagnostic is set and displayed at the
Human Interface Panel.
2
Supply Air T emperatur e Controls
Cooling/Economizer
During Occupied cooling mode of
operation, the economizer (if available)
and mechanical cooling are used to
control the supply air temperature. The
supply air temperature setpoint and
deadband are user -defined at the Human
Interface Panel. If the enthalpy of the
outside air is appropriate to use “free
cooling,” the economizer will be used
first to attempt to satisfy the supply air
setpoint; then if required the mechanical
cooling will be staged on to maintain
supply air temperature setpoint.
Minimum On/Off timing of
the mechanical cooling prevents
rapid cycling.
On units with economizer , a call for
cooling will modulate the fresh air
dampers open. The rate of economizer
modulation is based on deviation of the
discharge temperature from setpoint,
i.e., the further away from setpoint, the
faster the fresh air damper will open.
First stage of cooling will be allowed to
start after the economizer reac hes
full open.
Note that the economizer is only allowed
to function freely if one of the following
conditions is met. For dry bulb
economizer control the ambient
temperature must be below the dry bulb
temperature control setting. For
reference enthalpy economizer control,
outdoor air enthalpy must be below the
enthalpy control setting. For comparative
enthalpy economizer control, outdoor air
enthalpy must be below the enthalpy of
the return air.
At outdoor air conditions above the
enthalpy control setting, mechanical
cooling only is used and the fresh air
dampers remain at minimum position.
If the unit does not include an
economizer , mec hanical cooling only is
used to satisfy cooling requirements.
Outdoor air dampers may be set
manually for a maximum of 25 percent
outdoor air, if roof top is equipped with 0
to 25 percent manual fresh air damper.
75RT-PRC010-EN
Controls
(VAV Units)
Heating: Hot Water or St eam
On units with hot water or steam
heating, the supply air temperature can
be controlled to a heating set point
during the Occupied mode. The supply
air temperature heating set point and
deadband are user-defined at the Human
Interface Panel. VAV Occupied heating on
hot water and steam heat units is
enabled by closing a field-supplied
switch or contacts connected to an
changeover input on the RTM.
Heating: Modulating Gas
Upon a call for heating, the UCM closes
the heating contacts, beginning the firing
sequence. First, the heat exchanger
combustion blower begins operation.
Upon positive proving of combustion
airflow, a pre-purge cycle is executed.
Then the ignition sequence takes place.
If ignition is not proven, the ignition
transformer is de-energized. After a time
delay, another pre-purge cycle takes
place, followed by another attempt to
ignite. If ignition fails a second time, the
heating section will be shut down and
locked out until manually reset at the
unit mounted Human Interface Panel.
As additional heat is required, the air
damper opens, increasing the firing rate.
During heating operation, an electronic
flame safety control provides continuous
flame supervision. If combustion should
become unstable for any reason, heating
will automatically shut down. Af ter one
minute, another 60 second pre-purge
and ignition cycle begins.
As the heating requirement is satisfied,
the UCM will reduce the combustion air
and the firing rate will lower to maintain
the desired outlet temperature. When
the requirement is fully satisfied, the
heating contacts are opened, deenergizing the heat. The specific
sequence of operation of the gas heat
will depend on the size of the heat
exchanger.
Supply Air Setpoint Reset
Supply air reset can be used to adjust
the supply air temperature setpoint on
the basis of a zone temperature or on
outdoor air temperature. Supply air reset
adjustment is available from the Human
Interface Panel for supply air heating and
supply air cooling control.
A
reset based on outdoor air temperat ur e
Outdoor air cooling reset is sometimes
used in applications where the outdoor
temperature has a large effect on
building load. When the outside air
temperature is low and the building
cooling load is low, the supply air
setpoint can be raised, thereby
preventing subcooling of critical zones.
This reset can lower usage of
mechanical cooling, thus savings in
compressor KW, but a increase in supply
fan KW may occur.
Outdoor air heating reset is the inverse
of cooling, with the same principles
applied.
For both outdoor air cooling reset and
heating reset, there are three user
defined parameters that are adjustable
through the Human Interface Panel.
- beginning reset temperature
- ending reset temperature
- maximum amount of temperature reset
B
reset based on zone temper at ure
Zone reset is applied to the zone(s) in a
building that tend to overcool or
overheat. The supply air temperature
setpoint is adjusted based on the
temperature of the critical zone(s). This
can have the effect of improving comfort
and/or lowering energy usage. The userdefined parameters are the same as for
outdoor air reset.
Supply Air T emper ing
Hot water, steam, and modulating g as
units only — When supply air
temperature falls below the supply air
temperature deadband low end, the
heating valve is modulated open to
maintain the set minimum supply air
temperature.
3
Zone T emperature Control
Unoccupied Zone Heating and Cooling
During Unoccupied mode, the unit is
operated as a CV unit. Inlet guide vanes
and VAV boxes are driven full open. The
unit controls zone temperature within
the Unoccupied zone cooling and
heating (heating units only) deadbands.
Daytime war m-up
This feature is available on all types of
heating units. During Occupied mode, if
the zone temperature falls to a preset,
user -defined zone low limit temperature
setpoint the unit is put into Unoccupied
mode and Daytime W arm-up is initiated.
The system changes over to CV heating
(full unit airflow), the VAV boxes are fully
opened and full heating capacity is
provided until the Daytime Warm-up
setpoint is reached. The unit is then
returned to normal Occupied mode.
4
Outdoor Air CFM Compensation
The purpose of this feature is to
modulate the minimum position of the
economizer to compensate for varying
unit airflows in V AV units, thereby
minimizing the large variation of outdoor
air CFM that can occur. The feature
allows the user to set (calibrate) the
economizer minimum position with inlet
guide vanes (or VFD) at 0 percent and at
100 percent. On units with inlet guide
vanes (or VFD) and economizer, the
minimum position of the economizer is
modulated based on inlet guide vane
position (or VFD speed).
RT-PRC010-EN76
Controls
(CV Units)
CV Units Only
Sequence Of Operation
1
Occupied Zone T emper at ure Contr ol
Cooling/Economizer
During Occupied cooling mode, the
economizer (if provided) and mechanical
cooling are used to control zone
temperature. If the enthalpy of outside
air is appropriate to use “free cooling”,
the economizer will be used first to
attempt to satisfy the cooling zone
temperature setpoint; then the
compressors will be staged up as
necessary. Minimum on/of f timing of
compressors prevents rapid cycling.
On units with economizer , a call for
cooling will modulate the fresh air
dampers open. The rate of economizer
modulation is based on deviation of the
zone temperature from setpoint, i.e., the
further away from setpoint, the faster the
fresh air damper will open. First stage of
cooling will be allowed to start after the
economizer reaches full open.
Note that the economizer is only allowed
to function freely if one of the following
conditions is met: For dry bulb
economizer control, the ambient
temperature must be below the dry bulb
temperature control setting. For
reference enthalpy economizer control,
outdoor air enthalpy must be below the
enthalpy control setting. For comparative
enthalpy economizer control, outdoor air
enthalpy must be below the enthalpy of
the return air.
At outdoor air temperatures above the
enthalpy control setting, mechanical
cooling only is used and the outdoor air
dampers remain at minimum position.
If the unit does not include an
economizer , mec hanical cooling only is
used to satisfy cooling requirements.
Outdoor air dampers may be set
manually for a maximum of 25 percent
outdoor air, if roof top is equipped with 0
to 25 percent manual fresh air damper.
A
Heating
Gas Heating - T w o-Stag e
Upon a call for heating, the UCM closes
the first stage heating contacts
beginning the firing sequence. First, the
heat exchanger combustion blower
begins operation. Upon positive proving
of combustion airflow, a pre-purge cycle
is executed. Then the ignition sequence
takes place.
If ignition is not proven, the ignition
transformer is de-energized. Af ter a time
delay another pre-purge cycle takes
place followed by another attempt to
ignite. If ignition fails a second time, the
cycle repeats on 235 and 350 MBh
modules. 500, 850 and 1000 MBh
modules, the heating section will be
shut down and locked out until manually
reset at the unit mounted Human
Interface Panel.
As additional heat is required, the UCM
will close the second stage heating
contacts and depending on heat module
size, will open either the second stage of
the gas valve, or a second stage gas
valve.
During heating operation, an electronic
flame safety control provides continuous
flame supervision. If combustion should
become unstable for any reason, heating
will automatically shut down. After one
minute, another 60 second pre-purge
and ignition cycle begins.
As the heating requirement is satisfied,
the UCM will open the second stage
heating relay, de-energizing the second
stage of heat. When the requirement is
fully satisfied, the first stage contacts are
opened, de-energizing the first stage of
heat. The specific sequence of operation
of the gas heat will depend on the size of
the heat exchanger .
77RT-PRC010-EN
Controls
(CV Units)
Gas Heating: Modulating Gas
Upon a call for heating, the UCM closes
the heating contacts, beginning the firing
sequence. First, the heat exchanger
combustion blower begins operation.
Upon positive proving of combustion
airflow, a pre-purge cycle is executed.
Then the ignition sequence takes place.
If ignition is not proven, the ignition
transformer is de-energized. After a time
delay, another pre-purge cycle takes
place, followed by another attempt to
ignite. If ignition fails a second time, the
heating section will be shut down and
locked out until manually reset at the
unit mounted Human Interface Panel.
As additional heat is required, the air
damper opens, increasing the firing rate.
During heating operation, an electronic
flame safety control provides continuous
flame supervision. If combustion should
become unstable for any reason, heating
will automatically shut down. Af ter one
minute, another 60 second pre-purge
and ignition cycle begins.
As the heating requirement is satisfied,
the UCM will reduce the combustion air,
and the firing rate will lower to maintain
the desired outlet temperature. When
the requirement is fully satisfied, the
heating contacts are opened, deenergizing the heat. The specific
sequence of operation of the gas heat
will depend on the size of the heat
exchanger .
Electric Heating
The three stages of electric heat will be
sequenced on the zone demand signal
from the zone sensor. The signal is sent
to the UCM and the stages are
sequenced based on load demand.
Hot Wat er or Steam Heating
Upon a call for heat, the UCM will send a
varying voltage signal to the valve
actuator. The valve will modulate to meet
building demand as indicated by the
voltage signal. When heating is satisfied,
the valve will modulate closed.
A temperature sensor is located on the
coldest section of the coil. When it
senses an impending freeze condition, a
signal is sent to the hydronic valve to
drive it full open. If the supply fan is on,
or if the outside air damper is open
when this freezing condition is sensed,
the supply fan is turned off and the
outside air damper is closed.
B
Supply Air T emper ing
For gas and electric heat units in the Heat
mode but not actively heating, if the
supply air temperature drops to 1 0 F
below the Occupied zone heating
temperature setpoint, one stage of heat
will be brought on to maintain a
minimum supply air temperature. The
heat stage is dropped if the supply air
temperature rises to 10 F abo ve the
Occupied zone heating temperature
setpoint.
C
Aut o Changeov er
When the System Mode is “Auto,” the
mode will change to cooling or heating
as necessary to satisfy the zone cooling
and heating setpoints. The zone cooling
and heating setpoints can be as close as
2 F apart.
2
Unoccupied Zone T emperat ur e Control
Cooling and Heating
Both cooling or heating modes can be
selected to maintain Unoccupied zone
temperature deadbands. For
Unoccupied periods, heating,
economizer operation or compressor
operation can be selectively locked out at
the Human Interface Panels.
RT-PRC010-EN78
Controls
(VAV/CV Units)
Control Sequences of
Operation Common to Both
VAV and CV Units
1
Space Pressure Control — Statitrac™
A pressure transducer is used to
measure and report direct space
(building) static pressure. The userdefined control parameters used in this
control scheme are space static pressure
setpoint and deadband. As
the economizer opens, the building
pressure rises and enables the
exhaust fan and dampers or exhaust
VFD. The exhaust dampers or VFD then
modulate to maintain space pressure
within the deadband.
2
Morning Warm-up
This feature is available on all types of
factory-installed heat units and on units
with no heat, this function may still be
selected to support systems with heat
sources not provided by the rooftop unit.
At the conclusion of Unoccupied mode,
while the economizer (if supplied) is kept
closed, the selected zone is heated to the
user-defined Morning Warm-up setpoint.
The unit is then released to Occupied
mode. There are two types of Morning
Warm-up: full capacity or cycling
capacity.
A
Full Capacity Morning Warm-up (MWU)
Full capacity Morning Warm-up uses full
heating capacity, and heats the zone up
as quickly as possible. Full heating
capacity is provided until the Morning
Warm-up setpoint is met. At this point,
the unit is released to Daytime mode.
B
Cycling Capacity Morning Warm-up
(MWU)
Cycling capacity Morning Warm-up
provides a more gradual heating of the
zone. Normal zone temperature control
with varying capacity is used to raise the
zone temperature to the MWU zone
temperature setpoint. This method of
warm-up is used to overcome the
“building sink” effect. Cycling capacity
MWU will operate until MWU setpoint is
reached or for 60 minutes, then the unit
switches to Occupied mode.
Note: When using the Morning Warmup
option in a VAV heating/cooling rooftop,
airflow must be maintained through the
rooftop unit. This can be accomplished
by electrically tying the VAV boxes to the
unoccupied output relay contacts on the
Rooftop Module (RTM) or by using
changeover thermostats. Either of these
methods will assure adequate airflow
through the unit and satisfactory heating
of the building.
3
Ventilation Override (VOM)
The user can customize up to five (5)
different override sequences for
purposes of ventilation override control.
If more than one VOM sequence is being
requested, the sequence with the highest
priority is initiated first. Priority schedule
is that sequence “A” (unit off) is first, with
sequence “E” (purge with duct pressure
control) last.
UNIT OFF sequence “A”
When complete system shut down is
required the following sequence could
be used.
- Supply fan - Off.
- Supply fan VFD - Off (0 Hz) (if
equipped)
- Inlet guide vanes - Closed
(if equipped).
- Exhaust fan - Off, exhaust dampers Closed (if equipped).
- Exhaust fan VFD - Off (0 Hz) (if
equipped)
- Outside air dampers - Closed.
- Heat - all stages - Off, Modulating heat
output at 0 vdc.
- Occupied/Unoccupied output Deenergized
- VO relay - Energized
PRESSURIZE sequence “B”
Perhaps a positively pressurized space is
desired instead of a negatively
pressurized space. In this case, the
supply fan should be turned on with inlet
guide vanes open and the exhaust fan
should be turned off.
- Supply fan - On.
- Supply fan VFD - On (60 Hz) (if
equipped)
- Inlet guide vanes/VAV boxes - Open
(if equipped).
- Exhaust fan - Off, exhaust dampers Closed (if equipped).
- Exhaust fan VFD - Off (0 Hz) (if
equipped)
- Outside air dampers - Open.
- Heat - all stages - Off, Modulating heat
output at 0 vdc.
- Occupied/Unoccupied output Energized
- VO relay - Energized
EXHAUST sequence “C”
With only the exhaust fans running
(supply fan off), the space that is
conditioned by that rooftop would
become negatively pressurized. This is
desirable for clearing the area of smoke
from the now-extinguished fire, possibly
keeping smoke out of areas that were
not damaged.
- Supply fan - Off.
- Supply fan VFD - Off (0 Hz) (if
equipped)
- Inlet guide vanes - Closed
(if equipped).
- Exhaust fan - On, exhaust dampers Open (if equipped).
- Exhaust fan VFD - On (60 Hz) (if
equipped)
- Outside air dampers - Closed.
- Heat - all stages - Off, Modulating heat
output at 0 vdc.
- Occupied/Unoccupied output Deenergized
- VO relay - Energized
79RT-PRC010-EN
Controls(VAV/CV Units)
PURGE sequence “D”
Possibly this sequence could be used for
purging the air out of a building before
coming out of Unoccupied mode of
operation on VAV units or when the
purging of smoke or stale air is required
after a fire.
- Supply fan - On.
- Supply fan VFD - On (60 Hz) (if
equipped)
- Inlet guide vanes/VAV boxes - Open
(if equipped).
- Exhaust fan - On, exhaust dampers Open (if equipped).
- Exhaust fan VFD - On (60 Hz) (if
equipped)
- Outside air dampers - Open.
- Heat - all stages - Off, Modulating heat
output at 0 vdc.
- Occupied/Unoccupied output Energized
- VO relay - Energized
PURGE with duct pressure control “E”
This sequence can be used when supply
air control is required for smoke control.
- Supply fan - On.
- Supply fan VFD - On (if equipped)
- Inlet guide vanes/VFD controlled by
supply air pressure control function
with supply air pressure high limit
disabled.
- Exhaust fan - On, exhaust dampers Open (if equipped).
- Exhaust fan VFD - On (60 Hz) (if
equipped)
- Outside air dampers - Open.
- Heat - all stages - Off, Modulating heat
output at 0 vdc.
- Occupied/Unoccupied output Energized
- VO relay - Energized
Note: Each system (exhaust, supply air,
etc.) within the unit can be redefined in
the field for each of the five sequences, if
required. Also the definitions of any or all
of the (5) five sequences may be locked
into the software by simple key strokes
at the Human Interface Panel.
Emergency Override Definitions with
LCI-I (LonTalk Communication Interface
for IntelliPak) module installed
When an LCI-I module is installed, the
user can initiate one of five (5)
Emergency Override sqeuences that
have the following predefined unit
operation:
PRESSURIZE
- Supply Fan - On
- Inlet Vanes - Open (if equipped)
- Exhaust Fan - Off (if equipped)
- Exhaust Dampers - Closed (if
equipped)
- OA Dampers - Open
- Heat - All heat stages Off (staged gas
and electric), hydronic heat and
modulating gas heat output at 0%.
- Occupied/Unoccupied output Energized
- VO Relay - Energized (with VOM
module installed)
- OA Preheater State - Off (with VCM
module installed)
DEPRESSURIZE
- Supply Fan - Off
- Inlet Vanes - Closed (if equipped)
- Exhaust Fan - On (if equipped)
- Exhaust Dampers -Open (if equipped)
- OA Dampers - Closed
- Heat - All heat stages Off (staged gas
and electric), hydronic heat and
modulating gas heat output at 0%.
- Occupied/Unoccupied output De-energized
- VO Relay - Energized (with VOM
module installed)
- OA Preheater State - Off (with VCM
module installed)
PURGE
- Supply Fan - On
- Inlet Vanes - Open (if equipped)
- Exhaust Fan - On (if equipped)
- Exhaust Dampers - Open (if equipped)
- OA Dampers - Open
- Heat - All heat stages Off (staged gas
and electric), hydronic and modulating
gas heat output at 0%.
- Occupied/Unoccupied output Energized
- VO Relay - Energized (with VOM
module installed)
- OA Preheater State - Off (with VCM
module installed)
SHUTDOWN
- Supply Fan - Off
- Inlet Vanes - Closed (if equipped)
- Exhaust Fan - Off (if equipped)
- Exhaust Dampers - Closed (if
equipped)
- OA Dampers - Closed
- Heat - All heat stages Off (staged gas
and electric), hydronic heat and
modulating gas heat output at 0%.
- Occupied/Unoccupied output De-energized
- VO Relay - Energized (with VOM
module installed)
- OA Preheater State - Off (with VCM
module installed)
FIRE
- Supply Fan - Off
- Inlet Vanes - Closed (if equipped)
- Exhaust Fan - Off (if equipped)
- Exhaust Dampers - Closed (if equipped)
- OA Dampers - Closed
- Heat - All heat stages Off (staged gas
and electric), hydronic heat and
modulating gas heat output at 0%.
- Occupied/Unoccupied output De-energized
- VO Relay - Energized (with VOM
module installed)
- OA Preheater State - Off (with VCM
module installed)
4
Human Interface Panel (HI)
The Human Interface (HI) Panel provides
a 2 line X 40 character clear English
liquid crystal display and a 16 button
keypad for monitoring, setting, editing
and controlling. The Human Interface
Panel is mounted in the unit’s main
control panel and is accessible through a
hatch built into the unit’s control panel
door.
The optional remote-mount version of
the Human Interface (RHI) Panel has all
the functions of the unit-mount version
except Service Mode. To use a RHI the
unit must be equipped with an optional
InterProcessor Communications Bridge
(IPCB). The RHI can be located up to
1,000 feet from the unit. A single RHI can
be used to monitor and control up to 4
rooftops, each containing an IPCB.
RT-PRC010-EN80
Controls
(VAV/CV Units)
Human Interface Panel Main Menu
• STATUS — used to monitor all
temperatures, pressures, humidities,
setpoints, input and output status. The
• CUSTOM key allows the user to
customize a status report—consisting
of up to (4) screens of the data
available in the main Status menu.
• SET POINTS — used to edit all factory
preset Default setpoints
• DIAGNOSTICS — used to review active
and historical lists of diagnostic
conditions. A total of 49 different
diagnostics can be read at the Human
Interface Panel. The last 20 diagnostics
can be held in an active history buffer
log.
• SETUP — Control parameters, sensor
selections, setpoint source selections,
output definitions, and numerous
other points can be edited in this
menu. All points have factory preset
values so unnecessary editing is kept
to a minimum.
• CONFIGURATION — Preset with the
proper configuration for the unit as it
ships from the factory, this information
would be edited only if certain features
were physically added or deleted from
the unit. For example, if a field supplied
Trane Communication Interface (TCI)
module or Ventilation Override Module
was added to the unLitorder it in the
field, the unit configuration would need
to be edited to reflect that feature.
• SERVICE — used to selectively control
outputs (for compressors, fans,
damper position, etc.) for servicing or
troubleshooting the unit. This menu is
accessible only at the unit-mounted
Human Interface Panel.
5
Generic Building Automation System
Module (GBAS)
The Generic Building Automation
System Module (GBAS) is used to
provide broad control capabilities for
building automation systems other than
the Trane’s Tracer™ system. A field
provided potentiometer or a 0-5 vdc
signal can be applied to any of the inputs
of the GBAS to provide:
a
Analog Inputs — 4 Analog inputs that
can be configured to be any of the
following:
(1) Occupied Zone Cooling
(2) Unoccupied Zone Cooling
(3) Occupied Zone Heating
(4) Unoccupied Zone Heating
(5) SA Cooling Setpoint
(6) SA Heating Setpoint
(7) Space Static Pressure Setpoint
(8) SA Static Pressure Setpoint
b
Binary Outputs — each of the five (5)
relay outputs can be mapped to any/all
of the available diagnostics.
c
Demand Limiting Binary Input — This
function is operational on units with a
GBAS and is used to reduce electrical
consumption at peak load times. There
are two types of demand limiting, 50%
and 100%. When demand limiting is
needed, mechanical cooling and heating
operation are either partially (50%), or
completely disabled (100%), in order to
save energy. The definition of Demand
Limit is user definable at the Human
Interface Panel. Demand Limit binary
input accepts a field supplied switch or
contact closure. When the need for
demand limiting has been discontinued,
the unit’s cooling/heating functions will
again become fully enabled.
6
Evaporator Coil Frost Protection —
FROSTAT™
A temperature sensor on the evaporator
is used to determine if the coil is getting
close to a freezing condition. Mechanical
cooling capacity is shed as necessary to
prevent icing.
The FROSTAT™ system eliminates the
need for hot gas bypass and adds a
suction line surface temperature sensor
near the TXV bulb location to shut the
cooling off when coil frosting conditions
occur. The supply fans are not shut off
and will de-ice the coil. Timers prevent
the compressors from rapid cycling.
7
Occupied/Unoccupied Switching
a
Description — 3 ways to switch
Occupied/Unoccupied:
(1) NSB Panel
(2) Field-supplied contact closure
(hardwired binary input to RTM)
(3) TRACER
Night Setback Sensors
Trane’s night setback sensors are
programmable with a time clock function
that provides communication to the
rooftop unit through a 2-wire
communications link. The desired
transition times are programmed at the
night setback sensor and communicated
to the rooftop.
Night setback (unoccupied mode) is
operated through the time clock
provided in the sensors with night
setback. When the time clock switches to
night setback operation, the outdoor air
dampers close and heating/cooling can
be enabled or disabled depending on
set-up parameters. As the building load
changes, the night setback sensor
energizes the rooftop heating/cooling (if
enabled) function and the evaporator
fan. The rooftop unit will cycle through
the evening as heating/cooling (if
enabled) is required in the space. When
the time clock switches from night
setback to occupied mode, all heating/
cooling functions begin normal
operation.
When using the night setback options
with a VAV heating/cooling rooftop,
airflow must be maintained through the
rooftop unit. This can be accomplished
by electrically tying the VAV boxes to the
Unoccupied output relay contacts on the
Rooftop Module (RTM) or by using
changeover thermostats. Either of these
methods will assure adequate airflow
through the unit and satisfactory
temperature control of the building.
81RT-PRC010-EN
(VAV/CV Units)Controls
Occupied/Unoccupied input on the RTM
This input accepts a field supplied switch
or contacts closure such as a time clock.
Trane Tracer™ System
The Trane Tracer System can control the
Occupied/Unoccupied status of
the rooftop.
8
Timed Override Activation — ICS
This function is operational when the
RTM is the zone temperature sensor
source, which was set up at the Human
Interface Panel. When this function is
initiated by the push of a override button
on the ICS sensor, the Tracer will switch
the unit to the Occupied mode. Unit
operation (Occupied mode) during timed
override is terminated by a signal from
Tracer.
Timed Override Activation — Non-ICS
This function is active whenever the
RTM is selected as the Zone Temperature
Sensor source, which was set up at the
Human Interface Panel. When this
function is initiated by the push of an
override button on the zone sensor, the
unit will switch to the Occupied mode.
Automatic Cancellation of the Timed
Override Mode occurs after three hours
of operation.
9
Low Ambient Compressor Lockout
This function will lock out the
compressor if the outdoor air
temperature is below the low ambient
compressor lock out temperature set
point. The factory setpoint is 50 F on
standard units and 0 F on low ambient
units. This setpoint is adjustable at the
Human Interface Panel. Compressors
will be locked out when outdoor air
temperatures falls below that selected
temperature and will be allowed to start
again when the temperature rises 5 F
above the setpoint.
10
Comparative Enthalpy Control of
Economizer
An optional Comparative Enthalpy
system is used to control the operation
of the economizer, and measures the
temperature and humidity of both return
air and outside air to determine which
source has lower enthalpy. This system
allows true comparison of outdoor air
and return air enthalpy by measurement
of outdoor air and return air
temperatures and humidities.
Reference Enthalpy Control of
Economizer
The optional reference enthalpy
compares ambient temperature and
humidity to the economizer enthalpy
control setpoint. If ambient temperature
and humidity are below the economizer
enthalpy control setpoint the economizer
will operate freely. This system provides
more sophisticated control where
outdoor air humidity levels may not be
acceptable for building comfort and
indoor air quality.
Dry Bulb Temperature Control of
Economizer
The optional dry bulb system measures
ambient temperature comparing it to the
economizer control temperature
setpoint. If the ambient temperature is
below the economizer dry bulb
temperature control setpoint, the
economizer will operate freely. This
system is best suited for arid regions
where the humidity levels of fresh air
would not be detrimental to building
comfort and indoor air quality.
11
Compressor Lead/Lag
Compressor lead/lag is a user-selectable
feature through the Human Interface
Panel available on all units. After each
request for compressor operation, the
lead refrigeration circuit or compressor
on 20-30 tons units switches, thereby
causing a more equitable or balanced
run time among compressors.
12
Emergency Stop Input
A binary input is provided on the
Rooftop Module (RTM) for installation
of field provided switch or contacts for
immediate shutdown of all unit
functions.
RT-PRC010-EN82
Electrical
Data
Electrical Service Sizing
To correctly size electrical service
wiring for your unit, find the
appropriate calculations listed below.
Each type of unit has its own set of
calculations for MCA (Minimum Circuit
Ampacity), MOP (Maximum
Overcurrent Protection), and RDE
(Recommended Dual Element fuse
size). Read the load definitions that
follow and then find the appropriate
set of calculations based on your unit
type.
Set 1 is for cooling only and cooling
with gas heat units, and set 2 is for
cooling with electric heat units.
Load Definitions: (To determine load
values, see the Electrical Service Sizing
Data T ables on the following page.)
LO AD1 = CURREN T OF THE LARGEST
MOTOR (COMPRESSOR OR F AN
MOTOR)
LO AD2 = SUM OF THE CURRENTS OF
ALL REMAINING MOT ORS
LO AD3 = CURREN T OF ELECTRIC
HEA TERS
LO AD4 = ANY OTHER LOAD RA TED A T
1 AMP OR MORE
Set 1. Cooling Only Rooft op Units and
Cooling with Gas Heat Rooftop Units
MCA = (1 .25 x L OAD1) + LO AD2 +
LOAD4
MOP = (2.25 x LO AD1) + L O AD2 +
LOAD4
Select a fuse rating equal to the MOP
value. If the MOP value does not equal
a standard fuse size as listed in NEC
240-6, select the next lower standard
fuse rating. NOTE: If selected MOP is
less than the MCA, then reselect the
lowest standard maximum fuse size
which is equal to or larger than the
MCA, provided the reselected fuse size
does not exceed 800 amps.
RDE = (1 .5 x L OAD1) + LO AD2 + L OAD4
Select a fuse rating equal to the RDE
value. If the RDE value does not equal
a standard fuse size as listed in NEC
240-6, select the next higher standard
fuse rating. NOTE: If the selected RDE
is greater than the selected MOP value,
then reselect the RDE value to equal the
MOP value.
Set 2. Rooft op units with Electr ic Heat
a. Single Source Po w er (380V, 415V, 460V ,
and 575V)
To arrive at the correct MCA, MOP, and
RDE values for these units, you must
perform two sets of calculations. First
calculate the MCA, MOP, and RDE values
as if the unit was in cooling mode (use
the equations given in Set 1). Then
calculate the MCA, MOP, and RDE values
as if the unit were in the heating mode as
follows.
(Keep in mind when determining L O ADS
that the compressors don’t run while the
unit is in the heating mode).
For units using heaters less than 50 kw.
MCA = 1 .25 x (LOAD1 + L O AD2 + LOAD4)
+ (1 .25 x L O AD3)
For units using heaters equal to or
greater than 50 kw.
MCA = 1 .25 x (L OAD1 + LO AD2 + L OAD4)
+ LO AD3
The nameplate MCA value will be the
larger of the cooling mode MCA value or
the heating mode MCA value calculated
above.
MOP = (2.25 x LO AD1) + L OAD2 + LO AD3
+ LO AD4
The selection MOP value will be the
larger of the cooling mode MOP value or
the heating mode MOP value calculated
above.
Select a fuse rating equal to the MOP
value. If the MOP value does not equal a
standard fuse size as listed in NEC 240-6,
select the next lower standard fuse
rating. NOTE: If selected MOP is less than
the MCA, then reselect the lowest
standard maximum fuse size whic h is
equal to or larger than the MCA,
provided the reselected fuse size does
not exceed 800 amps.
RDE = (1 .5 x L O AD1) + LOAD2 + L O AD3 +
LOAD4
The selection RDE value will be the larger
of the cooling mode RDE value or the
heating mode RDE value calculated
above.
Select a fuse rating equal to the RDE
value. If the RDE value does not equal a
standard fuse size as listed in NEC 240-6,
select the next higher standard fuse
rating. NOTE: If the selected RDE is
greater than the selected MOP value,
then reselect the RDE value to equal the
MOP value.
b. Dual Source P o w er units (200V and
230V)
These units will have two circuit values
shown on the nameplate. The first circuit
value will be the refrigeration (cooling
mode) values calculated per Set 1. The
second set of circuit values shown on the
nameplate will be for the electric heating
circuit as follows.
MCA = (1 .25 x L OAD3)
MOP = (1 .25 x L OAD3)
Select a fuse rating for the electric
heating circuit that’s equal to the MOP
value obtained in the equation above. If
the MOP value does not equal a
standard fuse size as listed in NEC 240-6,
select the next lower standard fuse rating
(see note below for exception).
NOTE: If the available MOP option is less
than the MCA obtained in the equation
above, then reselect the lowest standard
maximum fuse size whic h is equal to, or
larger, than the MCA, provided the
reselected fuse size does not exceed 800
amps.
RDE = LO AD3
Select a fuse rating for the electric
heating circuit that’s equal to the RDE
value. If the RDE value does not equal a
standard fuse size as listed in NEC 240-6,
select the next higher standard fuse
rating. NOTE: If the selected RDE is
greater than the selected MOP value,
then reselect the RDE value to equal the
MOP value.
GENERAL NOTES:
On 20 to 130 ton rooftops, the selected
MOP value is stamped in the MOP field
on the nameplate.
83RT-PRC01 0-EN
Electrical
Data
Table ED-1 — 20-130 Tons Electrical Service Sizing D ata1— Compressor
CompressorNominal Voltage
NominalPerCapacityCapacityRLA
T onsCoil TypeUnitKW (ea)KW (ea)(ea)(ea)(ea)(ea)(ea)(ea)(ea)(ea)
20Std and Hi-Cap29.810.241.926941.925118.211714.694
25Std and Hi-Cap115.015.562.840962.837627.317821.8143
30Std and Hi-Cap215.715.762.840962.837627.317821.8143
40Std and Hi-Cap49.810.141.926941.925118.211714.694
50Std and Hi-Cap215.315.462.840962.837627.317821.8143
55Std and Hi-Cap415.315.662.840962.837627.317821.8143
60Std and Hi-Cap414.415.062.840962.837627.317821.8143
70Std215.6—62.840962.837627.317821.8143
75Std215.8—62.840962.837627.317821.8143
75Hi-Cap2—16.962.840962.837627.317821.8143
90Std and Hi-Cap415.716.362.840962.837627.317821.8143
105Std and Hi-Cap615.615.962.840962.837627.317821.8143
115Std416.4—62.840962.837627.317821.8143
130Std815.5—————27.317821.8143
Note:
1. Use this table only for sizing electrical service. DO NOT USE FOR CALCULATING EER.
Note: The pedestal was purposely designed
13/8” shorter than the curb because the unit’s
base rails rest on the pedestal at one point
and on the curb at a different point.
1. The return opening of the roof curb is provided with an adjustable filler panel six inches wide. This panel allows adjustment of the return air opening in order to clear roof members of all
standard roof constructions with both the supply and return openings. The return air opening of the curb is at a 90 degree angle as compared to the rooftop return air opening to allow
this placement flexibility. The curb acts as a plenum between the ductwork and the unit return opening. A retainer clip is used to secure the adjustable filler piece to the roof curb.
*“P” dimension is 5’ 6” on 60, 70, 75 Tons SEHF (Units with electric heat).
**“R” dimension is 2’ 51/8” on 60, 70, 75 Tons SEHF (Units with electric heat).
Figure DD-4 — 90, 105, 115, 130 Ton Heating/Cooling and Cooling Only Rooftops
6
Figure DD-5 — 90 - 130 Tons — Service Clearance
SEE NOTE 5
Notes:
1. Provide unrestricted clearance over the condenser fans.
2. A minimum clearance of 2’ 4-1/2” is required to open the hinged
control panel doors. Both doors swing outward in a 180-degree arc.
3. A minimum clearance of 2’ 10-3’4” is required to open the access
doors on the unit’s supply fan, evaporator, filter and exhaust fan
sections. All hinged doors swing outward in a 180-degree arc.
4. 90-130 ton models have two outdoor air intakes located at the back
of the unit and one small outdoor air intake located at
the end of the unit.
5. A minimum clearance of 3’ 7” is required to open the hinged access
panel door to the VFD enclosure.
6. Unit drawing is representative only and may not accurately depict all
models.
RT-PRC010-EN90
Figure DD-6 — 90 - 130 Ton Roof Curb Dimensions
Dimensional
Data
(90 - 130 Tons)
Cross Section Thru
Roof Curb and base pan
Note: The pedestal was purposely designed
13/8” shorter than the curb because the unit’s
base rails rest on the pedestal at one point
and on the curb at a different point.
SECTION B-B
91RT-PRC01 0-EN
Dimensional
(Variable Air
Data
Field Installed Sensors
SINGLE SETPOINT SENSOR WITH SYSTEM FUNCTION LIGHTS (BAYSENS021*)
Volume VAV)
PROGRAMMABLE NIGHT-SETBACK SENSOR (BA YSENS020*)
Note:
1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.
RT-PRC010-EN92
93RT-PRC010-EN
Dimensional
Data
(Constant
V olume CV)
Field Installed Sensors
DUAL SETPOINT, MANUAL/A UTOMATIC
CHANGEOVER SENSOR WITH SYSTEM
FUNCTION LIGHTS (BAYSENS01 0*)
WITHOUT LED STA TUS INDICATORS
(BAYSENS008*)
SINGLE SETPOINT WITHOUT
LED STA TUS INDICATORS (BAYSENS006*)
Note:
1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.
PROGRAMMABLE NIGHT-SETBACK SENSOR (BA YSENS019*)
Dimensional(CV and VA V)
Data
Integrat ed Comfor t™ System Sensors
ZONE TEMPERATURE SENSOR W/TIMED OVERRIDE BUTTON
AND LOCAL SETPOINT AD JUS TMENT (BAYSENS0 14)
1
ZONE TEMPERATURE SENSOR W/TIMED OVERRIDE BUTTONS
(BAYSENS013*) ALSO AVAILABLE SENSOR ONLY (BAY SENS017*)
REMOTE MINIMUM POSITION POTENTIOMETER CONTROL (BAYST AT023*)
TEMPERA TURE SENSOR (BAYSENS0 16*)
Note:
1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.
RT-PRC010-EN94
Weights
T able W-1 — Approximate Operating Weights (Lbs./Kg)
1. Weights shown include the following features: standard coils, 100% economizer, throwaway filters, maximum motor sizes (high efficiency), inlet guide vanes, 460V XL,
High Heat.
2. Weights shown represent approximate operating weights and have a ±5% accuracy. ACTUAL WEIGHTS ARE STAMPED ON THE UNIT NAMEPLATE.
3. If unit is not as specified in note 1, you must reference RT-EB-103 for more details, as well as for point loading and center of gravity.
Rooftops Without Exhaust FansRooftops With Exhaust FansRoof Curb
95RT-PRC010-EN
Options
Table O–1 Comprehensive Listing of Available Options and Accessories
Option or Accessory
1
Standard
Factory
Design
Special
2 3
Enhanced
Design
Facility
Special
2 3
Standard
Field
Installed
Accessory
Coils
Black epoxy evaporator coilsX
Copper finned evaporator coilsX
Copper finned condenser coils (20-75 tons only)X
Copper finned condenser coils (90-130 tons only)X
Heresite treated condenser coilsX
High capacity evaporator coils (20 to 105 tons)X
Pre-heat CoilX
Condenser
Evaporative-cooled condenserX
Controls
Generic BAS (Building Automation System) interfaceX
Inlet guide vanes on FC supply fans (Variable Air Volume (VAV) only)X
Inter-Processor Communication BridgeX
Kits available for field control upgradesX
No ControlsX
Remote Human Interface Panel (controls up to 4 units)X
Remote minimum position control for economizerX
Single zone VAV with Johnson S350 controller or terminal strip controlX
TRAQ sensing with ventilation control moduleX
Trane Communication Interface Module: ICS interface control moduleX
Variable frequency drive (VFD) control of supply/exhaust fan motorX
Table O–1 Comprehensive Listing of Available Options and Accessories Continued
Option or Accessory
1
Standard
Factory
Design
Special
2 3
Enhanced
Design
Facility
Special
Economizer
0-100 percent modulating fresh air economizerX
Economizer control options: comparative enthalpy, reference enthalpy, dry bulbX
Energy Recovery
Energy Recovery WheelX
Electrical
Convenience Outlet (Factory-powered 15A GFI)X
Dual power sourceX
Unit disconnect – Through the door non-fused disconnect with external handleX
Phase monitors (200/230/460/575V)X
Power factor correction capacitors — compressors and fansX
Fans
100 percent modulating exhaust w/or without Statitrac™ space pressure controlX
50 percent modulating exhaustX
Alternative supply fansX
Return fansX
Filters and Filter Racks
90-95 percent bag filtersX
90-95 percent cartridge filtersX
95 percent bag or cartridge final filters and rackX
Filter rack only (no filters)X
Final filtersX
Final filter rack onlyX
Filter rack — 4” deep panel rack placed in standard rack locationX
High efficiency throwaway filtersX
Replaceable core filter driersX
Heat
Heat modulesX
Heating options: natural gas, electric, hot water or steamX
Modulating gas heat — Full or limitedX
Propane (LP) conversion / Modulating LP heatX
Insulation
Double wall with perforated interior linerX
Notes:
1. Options are provided for informational purposes only. For specifics, contact your local Trane sales office.
2. Special Options may be subject to a net price add.
3. To determine if agency approval is available for special designs, contact your local Trane sales office.
Continued on the following pages
2 3
Standard
Field
Installed
Accessory
97RT-PRC010-EN
Options
Table O–1 Comprehensive Listing of Available Options and Accessories
Option or Accessory
Continued
1
Standard
Factory
Design
Special
2 3
Enhanced
Design
Facility
Special
Manville Tuff-Skin insulation w/ 25/50 flame/smoke development ratingX
Solid double wallX
Motors
40 hp 200 and 230 volt motors — supply fanX
High efficiency motorsX
Totally enclosed fan-cooled (TEFC) motorsX
Totally enclosed non-ventilated (TENV) motors – Condenser fan onlyX
Two-speed motors — supply fanX
Other
Access doors (hinged)X
Burglar BarsX
Extended grease linesX
Horizontal supply and return openings (20-75 ton SX,SL,SS,SF models only)X
Hot gas bypass to the evaporator inletX
Magnehelic pressure gaugesX
One zone Variable Air Volume (VAV)X
Outside air CFM compensation on VAV units with IGV/VFD and economizerX
Reversal of return/outside air sections with exhaust fansX
Safety grates installed over supply and returnX
Special paint colorsX
Spring Isolators (20-75 tons only)X
Suction service valvesX
Ultra-extended cabinet to accomodate field installed humidifiers,final filters,
sound attentuators, wing coils, air blenders, special filters, etc.X
Vertical discharge (20-75 ton SX,SL,SS,SF models only)X
VFD line reactorX
2 3
Standard
Field
Installed
Accessory
RT-PRC010-EN98
Options
Tabl e O–1 Comprehensive Listing of Available Options and A ccessor ies Continued
Option or Accessory
1
Standard
Factory
Design
Special
2 3
Enhanced
Design
Facility
Special
2 3
Standard
Field
Installed
Accessory
Sensors and Thermostats
ICS zone sensors used with Tracer™ sy stem for z one controlX
High duct temperature thermostatsX
Outdoor temperature sensor for units without economizersX
Programmable sensors with night set back — CV and VAVX
Remote zone sensors — used for remote sensing with remote panelsX
Sensors without night set back — CV and VAVX
War r anty
1 0 year limited w arranty on Full Modulation Gas HeatX
Notes:
1. Options are provided for informational purposes only. For specifics, contact your
local Trane sales office.
2. Special Options may be subject to a net price add.
3. For information on agency approval for special designs, contact your local Trane
sales office.
99RT-PRC01 0-EN
Options
Options
A full range of factory-installed modular
options are available on standard ship
cycles, allowing your rooftop design to
best suit each individual application.
Cooling Only/Heating Casings
• Cooling Only — Two casing choices are
available, one designed for high airside
efficiency and one for sound sensitive
applications. The 90 to 130 tons are
extended casing only.
• Electric Heat — Nickel-chromium
electric heating elements in
individually fused circuits of 48 amps
or less and with all necessary safeties.
A full range of sizing options is
available.
• Natural Gas Heat -- Two Stage and
Limited Modulation — Two-pass
stainless steel tubular free floating heat
exchanger has industrial type burner
and combustion blower. Available with
high or low fire and UL or CSA
approval.
• Natural Gas Heat - Full Modulation —
The heat exchanger drum, tubes and
front and rear headers are constructed
of the most corrosion resistant
austenitic stainless steel alloys
available.
• Steam Heat — ARI certified type NS
coil with non-freeze steam distribution.
Coils are pitched for drainage and are
provided with steam modulating valve
with actuator. High and low heat
options are available.
• Hot Water Heat — ARI certified type W
coil mounted for drainage and
provided with hot water modulating
valve with actuator. High and low heat
options are available.
Power Supplies
Rooftops are available with 200, 230, 460
and 575 voltage power supplies.
Exhaust
• No Exhaust — Rooftops can be built
for makeup air applications with no
exhaust. Relief opening is sealed
watertight.
• Barometric Relief — Gravity dampers
are provided that open to relieve
positive pressure.
• 50 Percent Exhaust Fan — One double
inlet forward-curved fan can exhaust
up to 50 percent of supply air. Control
is on/off based on economizer damper
position. Barometric dampers at fan
outlet prevent air backdraft.
• 100 Percent Modulating Exhaust Fan —
Two double inlet forward-curved fans
can exhaust up to 100 percent supply
air. Fans operate when economizer
damper is open greater than minimum
position. Discharge dampers at fan
outlet modulate in response to
economizer damper position on
CV rooftops.
• 100 Percent Modulating Exhaust with
Statitrac™ Control — For both CV and
VAV rooftops, the 100 percent
modulating exhaust discharge
dampers are modulated in response to
building pressure. A differential
pressure control system, called
Statitrac™, uses a differential pressure
transducer to compare indoor building
pressure to atmospheric pressure. The
FC exhaust fan is turned on when
required to lower building static
pressure to setpoint. The Statitrac
control system then modulates the
discharge dampers to control the
building pressure to within the
adjustable, specified dead band that is
set at the Human Interface Panel.
Filters
• No Filters (two inch throwaway filter
rack only) — complete set of two-inch
thick filter racks, without the filtermedia to accommodate applications
which require field supplied filters.
• No Filters (bag/cartridge with prefilter
filter rack) — long-lasting galvanized
steel frame without the filter media to
accommodate applications which
require field supplied filters.
• Throwaway — Two-inch, 30 percent
efficient throwaway filters, includes
rack as standard.
• Cleanable Wire Mesh — Two-inch
permanent washable wire mesh filters
are provided with metal frame.
• High-Efficiency Throwaway — Two inch
throwaway filters include rack and
have an average arrestance in excess
of 90 percent when tested in
accordance with ASHRAE 52-76.
• 90-95 Percent Bag Filter (with prefilter)
— Glass fiber extended media bag
filter is mounted in a galvanized steel
frame. 90-95 percent dust spot
efficiency. Two-inch throwaway
prefilters are included with this option.
• 90-95 Percent Cartridge Filter (with
prefilter) — These twelve-inch deep
cartridge filters are mounted in a
galvanized steel frame. They are Class 1
listed by Underwriters Laboratories
and have a 90-95 percent dust spot
efficiency per ASHRAE 52-76. To ensure
maximum cartridge filter life, two-inch
prefilters are included.
Fresh Air
• 0 To 25 Percent Manual Outside Air —
Includes outside air opening with
moisture eliminator and manually
positioned damper for drawing up to
25 percent outside air. (20-75 tons only)
• Economizer — Includes the primary
temperature controls necessary to
automatically use outdoor air for free
cooling. Option includes modulating
return and outside air dampers, high
ambient temperature lockout,
minimum position control and spring
return motor. Standard low leak
outside air dampers are provided with
a leakage rate of 2.5 percent of
nominal airflow at one inch W.C. static
pressure. The 0 to 100% fresh air
economizer has three optional
economizer controls available:
comparative enthalpy, reference
enthalpy, or dry bulb control.
System Control
• Constant Volume — Provided with all
the necessary controls to operate
rooftop from a zone sensor, including
CV microprocessor unit control
module, a microprocessor compressor
controller and a unit mounted Human
Interface Panel.
• VAV Supply Air Temperature control
without inlet guide vanes — Provided
with all the necessary controls to
operate a VAV rooftop from the
discharge air temperature, including
discharge air microprocessor controller
and discharge air sensor. The
microprocessor controller coordinates
the economizer control and the stages
of cooling with zone or outdoor air
reset capabilities and an adjustable
control band to fine-tune the control to
specific applications.
• VAV Supply Air Temperature control
with inlet guide vanes — Provided with
all the necessary controls to control/
operate a VAV rooftop from the
discharge air temperature, including a
RT-PRC010-EN100
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