VariTrane™ Products Parallel and Series Fan-Powered

March 2022

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Product Catalog

VariTrane™™ Products

Parallel and Series Fan-Powered

VPCF, VPWF, VPEF, VSCF, VSWF, VSEF, LPCF,

LPWF, LPEF, LSCF, LSWF, LSEF

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Introduction

This catalog includes parallel and series fan-powered VAV terminals, including standard and low

height models. As an option, these terminals can be equipped with hot-water heating coils or

electric heaters.

Figure 1. Parallel fan-powered terminal unit (VPCF) Figure 2. Series fan-powered terminal unit (VSCF)

Figure 3. Low height series: LSCF Figure 4. Low height series: LSWF

Figure 5. Low height series: LSEF Figure 6. Low height parallel: LPCF

Figure 7. Low height parallel: LPWF Figure 8. Low height parallel: LPEF

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This document and the information in it are the property of Trane, and may not be used or

reproduced in whole or in part without written permission. Trane reserves the right to revise this

publication at any time, and to make changes to its content without obligation to notify any

person of such revision or change.

Trademarks

All trademarks referenced in this document are the trademarks of their respective owners.

Revision History

Revised Performance data fan curves for Parallel 04SQ, 05SQ, VPxF 04SQ and Series 04SQ,

05SQ, 06SQ in Performance Data chapter.

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Features and Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

VariTrane — VAV Leadership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Energy Efficient Earthwise Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Fan-Powered VAV Units Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . 16

DDC Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

DDC Remote Heat Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Symbio 210, Symbio 210e, Tracer UC400 and UC210 Programmable BACnet

Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Trane LonMark® DDC VAV Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Direct Digital Controller—Unit Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Air-Fi Wireless Communications Interface (WCI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Air-Fi Wireless Communications Sensor (WCS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

DDC Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Wall Sensor and Duct CO

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

DDC Zone Sensor with LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Zone Occupancy Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Factory- or Field-wired Auxiliary Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . 51

Control Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Trane Control Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Belimo Control Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

VAV Piping Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Differential Pressure Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Transformers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Trane Actuator – 90 Second at 60 Hz Drive Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Belimo Actuator – 95 Second Drive Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Trane Spring Return Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Electric Heater Silicon-Controlled Rectifier (SCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Controls Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table of Contents

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Application Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

VAV System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

VariTrane VAV Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

VAV Terminal Unit Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Parallel vs. Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Low-Temperature Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Benefits of Low-Temperature Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Considerations for VAV products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Air Valve Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Heating Coil Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Fan Size and Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Selection Example—Parallel With Hot Water Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Selection Example—Series With Hot Water Heat and ECM . . . . . . . . . . . . . . . . . . . . . 89

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Performance Data Fan Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Water Coil Notes (I-P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Water Coil Notes (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Formulas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Acoustics Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Low Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Low Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

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Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Low-Height Parallel Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Low-Height Series Fan-Powered Terminal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222

Mechanical Specifications: Fan-Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

MODELS: VPCF, VPWF, VPEF, VSCF, VSWF, VSEF, LPCF, LPWF, LPEF, LSCF,

LSWF, & LSEF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

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Features and Benefits

VariTrane — VAV Leadership

VariTrane™ variable-air-volume (VAV) units lead the industry in quality and reliability and are

designed to meet the specific needs of today’s applications. This generation of VariTrane units

builds upon the history of quality and reliability and expands the products into the most

complete VAV offering in the industry.

PPaarraalllleell ffaann--ppoowweerreedd uunniittss offer energy savings due to intermittent fan control. The fan

energizes only in heating mode when the space needs heat. When energized, the fan can be

controlled for constant-speed or variable-speed operation. Additional energy savings are

obtained by using warm plenum air for free reheat. Motor heat is never wasted in parallel units.

They are an excellent choice when minimal zone heating is needed.

SSeerriieess ffaann--ppoowweerreedd uunniittss have fans which are always energized in occupied mode. When

energized, the fan can be controlled for constant-speed or variable-speed operation. They are

common in applications such as conference rooms, cafeterias, etc., that desire higher supply

airflow rates at all conditions.

LLooww--hheeiigghhtt ppaarraalllleell uunniittss casing height is 10.5 inches. This is a good choice for tight plenum

spaces. Low-height series units have been used for years in projects with strict plenum height

requirements.

LLooww--hheeiigghhtt sseerriieess uunniittss have been used for years in projects with strict plenum height

requirements. The height for available units is 10.5 inches and 12 inches.

Energy Efficient Earthwise Systems

Figure 9. Rooftop VAV system (office building)

A significant consumer of energy in commercial buildings is heating and air conditioning. One of

the most energy-efficient HVAC solutions is the VAV system. This inherent system efficiency,

along with high-quality, affordable DDC controls, has steadily increased demand for VAV

systems over the years. VAV systems save significant energy, are able to deliver the required

amount of ventilation air, and provide reliable occupant comfort.

Energy saving features must go beyond a simple VAV unit to incorporate VAV unit level and

system level control strategies like:

• Ventilation Optimization—Combines demand-controlled ventilation (using either a time-of-

day schedule, an occupancy sensor, or a carbon dioxide sensor) at the zone level with

ventilation reset at the system level to deliver the required amount of outdoor air to each

zone, while minimizing costly over-ventilation.

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• Fan Pressure Optimization—Reduces supply fan energy by intelligently reducing the pressure

in the air distribution system to the lowest possible level without impacting occupant

comfort.

• Night setback—Reduces energy consumption during unoccupied periods by raising or

lowering space temperature setpoints.

• Supply Air Temperature Reset—Reduces overall system energy use (balancing reduced

cooling and reheat energy with increased fan energy) by raising the supply air temperature at

part load, while avoiding elevated space humidity levels.

• Electrically Commutated Motors (ECM)—Improve the efficiency of fan-powered VAV units.

• Low Temperature Air Distribution—Can decrease overall system energy use by reducing

airflows and the fan energy needed to move that air through the system.

To determine the potential energy savings a VAV system can bring to your applications, Trane

offers energy-modeling software like System Analyzer™ and TRACE 700®. When TRACE™ was

introduced into the HVAC industry in 1972, the HVAC design and analysis program was the first

of its kind and quickly became a de facto industry standard. It continues to grow with the industry

meeting requirements for ASHRAE Standard 140, ASHRAE 90.1, and the LEED® Green Building

Rating System and has now been approved by the IRS to certify energy savings for building

owners. Contact your local Trane Sales Engineer for additional information.

A Rugged Air Valve—Trane air valves are heavy gage steel with a continuously welded seam to limit inlet

deformation. This provides consistent and repeatable airflow across the flow ring with performance you can

count on.

Technologically Advanced “SQ” Units—New super-quiet (SQ) fan/motor/wheel assemblies are engineered as

an air delivery system to provide the most efficient design available in the industry. For quiet comfort, you can

trust and rely on Trane SQ units.

C Tough Interlocking Panels—Ruggedness and rigidity are assured with Trane’s patent-pending interlocking

panel construction.

D Superior Metal Encapsulated Edges—All VariTrane Units are complete with metal encapsulated edges to arrest

cut insulation fibers and prevent erosion in the airstream.

E Full Range of Insulation—Whether seeking optimal acoustical performance or cleanability, Trane has a

complete line of insulation options, including double-wall, matte-faced, foil-faced, closed cell, etc.

Optional Narrow Corridor Unit Configuration—Designed to minimize building material expenses by squeezing

more into less space. Meets all NEC jumpback clearance requirements for these extra-tight areas. Narrow

Corridor Configuration not pictured here. Refer to Series Fan-Powered dimensional data for reference

drawings.

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G Service Friendly:

• Internal shaft visible through control box cover sight hole for blade orientation verification.

• Same-side NEC jumpback clearance provides all high-voltage and low-voltage components on the same

side to minimize field labor.

• SQ fan-powered units have improved accessability to internal components. Sliding panels are standard,

which improve safety and allow servicing with a single technician.

Control Flexibility—Trane factory installs more VAV controllers than any other manufacturer in the industry. In

addition to Trane DDC controls and simple factory-mounting of non-Trane VAV controllers, Trane now offers a

LonMark® controller that is completely factory commissioned to maximize installation quality and system

reliability. Labor savings are maximized with Trane factory-commissioned controllers.

Accurate Flow Ring—Housed and recessed within the air valve to provide flow ring handling and shipping

protection. The patented flow ring provides unmatched airflow measurement accuracy.

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Construction

UL-Listed Products

All VariTrane™ units are listed in accordance with UL -1995 as terminal units. This listing

includes the terminal with electric heaters. Additionally, all insulation materials pass UL 25/50

smoke and flame safety standards.

AHRI Certified Performance

All VariTrane™ units are AHRI certified. AHRI 880 guarantees the pressure drop, flow

performance, and acoustical performance provided is reliable and has been tested in accordance

with industry accepted standards. AHRI 885 uses AHRI 880 performance and applies accepted

industry methods to estimate expected “NC” sound levels within the occupied space.

Casing Design

Interlocking Panels – Patent-pending interlocking panels are designed using integral I-beam

construction technology. This minimizes deformation and creates tremendous product rigidity.

An additional benefit is a smooth unit exterior with few exposed screws - ideal for exposed

ceiling applications. VariTrane™ units are designed for use in systems that operate up to 5" w.c.

of inlet static pressure.

Metal Encapsulated Edges— All VariTrane™

units are complete with encapsulated edges

to arrest cut fibers and prevent insulation

erosion into the airstream. This is important

for applications concerned with fiberglass

erosion or projects with either double-wall or

externally wrapped duct work.

Trane Air Valve— Primary airflow is

measured and controlled here for VariTrane™

units. VariTrane™ products are the most

rugged and reliable available.

18-gauge Cylinder—The 18–gauge cylinder limits deformation or damage during shipment and

job site handling, and provides even airflow distribution across the flow ring for unmatched

airflow measurement accuracy.

Flow Ring—The Trane flow ring is time tested

to perform under the most demanding

conditions. Trane’s patented flow ring is

recessed within the air valve cylinder to

reduce the potential for damage during job

site handling and installation.

External Shaft—This simple design provides

controller flexibility and is designed to

facilitate actuator field replacement.

Position Indicator—The position indicator shows current air valve position to aid in system

commissioning. Many times this can be seen from the floor without climbing a ladder.

External Actuator—This feature increases serviceability, control system compatibility, and

actuator clutch access for simplified commissioning.

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Indoor Air Quality (IAQ) Features

System design should consider applicable ventilation and IAQ standards.(Contact your local

Trane Sales Engineer for additional information). Good indoor air quality results from units and

systems which:

• Provide the required amount of outdoor air to each zone during all operating conditions.

• Limit particulates from entering occupied spaces.

• Allow proper access for periodic cleaning.

Access made easy on VariTrane units, as shown on

this Series Fan-Powered unit.

VariTrane™ units are designed with simplified access and a full line of insulation options

including:

Matte-faced—Typical industry standard with reduced first cost.

Closed-cell—This insulation has an R-value and performance equivalent to matte-faced

insulation. The main difference is the reduction of water vapor transmission. Closed-cell is

designed for use in installations with a high chance of water formation. (It has been used to coat

the exterior of chiller evaporator barrels for many years.)

Foil-faced—A fiberglass insulation with a thin aluminum coating on the air stream side to prevent

fibers from becoming airborne. The aluminum lining is acceptable for many applications,

however it is not as rugged as double-wall.

Double-wall—Premium insulation often used in many health care applications with insulation

locked between metal liners. This eliminates the possibility for insulation entering the airstream

and allows for unit interior wipe-down as needed.

VariTrane™ VAV units are the most prepared IAQ units in the industry. The end result is a reliable

product designed for peak performance, regardless of job site conditions or handling.

Indoor Air Quality Management During Construction

LEED wrap option is a pressure sensitive

covering that prevents contamination of the

VAV box during the construction phase. It is

utilized to seal all openings without

constraining the installation process.

Tracer Building Automation System

Tracer® Building Automation Systems ensure comfort within your building.

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Building controls have a bigger job description than they did a few years ago. It’s no longer

enough to control heating and cooling systems and equipment. Sophisticated buildings require

smarter technology that will carry into the future. Tracer controls provide the technology

platform – mobile, easy-to-use, cloud-based, scalable and open - for the next generation of data-

driven, technology-enabled services that are creating high performance buildings.

With a Trane Tracer® Building Automation System, you’ll:

• Reduce operating costs through energy management strategies.

• Consistently provide occupant comfort.

• Enjoy reliable operation with standard, pre-engineered and pretested applications.

• Easily troubleshoot and monitor either on site or from a remote location.

• Reduce installation time and simplify troubleshooting.

Whether factory-mounted or field-installed, Trane offers a wide range of controllers to suit

virtually any application. These units are compatible with a variety of building types and can be

used for new construction or renovation. Through extensive usability testing internally and with

building operators, we’ve designed our controls for real world ease of use.

(Additional control options and sequence-of-operations are located in the “Controls” section.)

Trane VAV DDC UCM Controller

DDDDCC ((ccoommmmuunniiccaattiinngg eelleeccttrroonniicc))——DDC controllers

provide system-level data used to optimize overall

SYSTEM performance. Variables such as occupied/

unoccupied, minimum and maximum airflows and

temperature, valve position, ventilation fraction, and so

on are available on a simple Trane Comm3/4 protocol

twisted-shielded wire pair.

NNoottee:: One of many Trane DDC Control Options which are factory-installed, wired, calibrated, and

fully tested before shipment.

Trane DDC controllers provide Trane-designed solid-state electronics intended specifically for

temperature and ventilation control in space comfort applications. DDC control capabilities

include:

• Pressure-independent (PI) operation—Provides airflow required by the zone temperature

sensor to maintain occupant comfort. The controller automatically adjusts valve position to

maintain required airflow. Minimum and maximum airflow is factory-set and field-adjustable.

• Factory-set airflow and temperature setpoints.

• Most advanced system integration in the industry.

Tracer VV550 LonTalk Controllers

Trane offers a full line of LonTalk® controllers designed

for simple integration into ANY system which can

communicate via the LonTalk® Space Comfort Control

(SCC) protocol. These controllers are also completely

factory-commissioned.

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Tracer BACnet Controllers

Trane offers a full line of programmable BACnet® controllers designed for simple integration

into any system which can communicate via the BACnet® protocol. These controllers are factory-

downloaded, commissioned, and shipped ready to be installed.

UC210 BACnet

Controller

Symbio 210 BACnet

Controller

Symbio 210e BACnet

Controller

UC400 BACnet

Controller

Air-Fi Wireless System

For more detailed information on Air-Fi® Wireless systems and devices, see:

• BAS-SVX40*–EN Air-Fi

Wireless Installation, Operation, and Maintenance

• BAS-PRD021*–EN Air-Fi

Wireless Product Data Sheet

• BAS-SVX55*–EN Air-Fi

Wireless Network Design Best Practices

Air-Fi Wireless Communications Interface (WCI)

A factory-installed Air-Fi® Wireless Communications

Interface (WCI) provides wireless communication between

the Tracer® SC, Tracer® UC210/UC400 VAV unit controllers

and optionally, Air-Fi® Wireless Communication sensors.

The Air-Fi® WCI’s wireless mesh network is the perfect

alternative to a wired communication link. Eliminating the

low-voltage wire between the zone sensor and the terminal

unit controller, and between the unit controllers and the

system controller has substantial benefits:

• Reduced installation time and associated risks.

• Completion of projects with fewer disruptions.

• Easier and more cost-effective re-configurations,

expansions, and upgrades.

NNoottee:: WCI is not compatible with the Trane VAV UCM or

Tracer

VV550 LonTalk

controller.

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VAV-PRC012AC-EN

Air-Fi Wireless Communication Sensor (WCS)

The Wireless Communications Sensor (WCS)

communicates wirelessly to a Tracer® BACnet® unit

controller that has an Air-Fi® WCI installed. A WCS is an

alternative to a wired sensor when access and routing of

communication cable are issues. It also allows flexible

mounting and relocation. Also available are a non-display

version of the WCS with a temperature set point knob, an

occupancy / CO

sensor / zone temperature version of the

WCS, and a Relative Humidity (RH) sensor add-on daughter

board accessory.

Factory-installed vs. Factory-commissioned

The terms factory-installed and factory-commissioned are often used interchangeably. Trane

takes great pride in being the industry leader in factory-commissioned DDC controllers. The

following table differentiates these concepts.

Factory-commissioned controllers provide the highest quality and most reliable units for your

system. Additional testing verifies proper unit operation including occupied/unoccupied airflow

and temperature setpoints, communication link functionality, and output device functionality.

The benefits of factory-commissioning are standard on VariTrane™ terminal units with Trane

DDC controls. This means that factory-commissioned quality on VariTrane™ units is now

available on ANY manufacturer’s control system that can communicate using the L

ONMARK®

Space Comfort Control (SCC) protocol or the BACnet® protocol. (See Controls section for

complete listing of variables which are communicated.)

Table 1. Factory-installed vs. factory-commissioned

Factory-installed

Factory-

commissioned

Transformer installed (option)

X X

Wires terminated in reliable/consistent setting

X X

Controller mounted X X

Electric heat contactors and fan relay wired

X X

Controller addressing and associated testing

— X

Minimum and Maximum airflows settings (occupied/unoccupied)

— X

Minimum and Maximum temperature setpoints (occupied/unoccupied)

— X

Minimum ventilation requirements

— X

Heating offset

— X

Trane Air-Fi® wireless communications modules (WCI)

X X

Trane Air-Fi® Wireless Communications Sensor (WCS)

— —

Trane VAV Systems — Proven Performance

Trane is the industry leader in VAV systems, including factory-commissioned controls and

integration with other control systems. This leadership began with customers seeking the most

reliable VAV products in the industry. The solution was factory-commissioned controls (see

“Factory-installed vs. Factory-commissioned,” p. 14). Since then, it has developed to include

optimized system control strategies.

Control strategies are often made more complicated than necessary. VariTrane™ DDC controls

simplify control strategies by pre-engineering control logic and sequencing into the controller.

This information is available via a twisted-shielded wire pair or wireless communication, and

accessible via a Trane Tracer® SC.

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VAV-PRC012AC-EN

Optimized system control strategies, such as ventilation optimization, fan-pressure optimization,

and optimal start/stop, are pre-engineered in VariTrane™ unit-level DDC controllers and the

Tracer® SC building automation system.

This allows a Trane VAV system to meet or exceed the latest ASHRAE 90.1 Energy Efficiency

standards. Pre-engineered controls allow consistent, high quality installations which are very

repeatable. The end result is PROVEN control strategies you can rely on to perform.

Purchasing VAV controllers and VAV hardware from a single manufacturer provides a single

contact for all HVAC system related questions.

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VAV-PRC012AC-EN

Fan-Powered VAV Units Model Number Descriptions

Digit 1, 2— Unit Type

VP = VariTrane™ Fan-Powered Parallel

VS = VariTrane™ Fan-Powered Series

LP = VariTrane™ Fan-Powered Low Height

Parallel

LS = VariTrane™ Fan-Powered Low Height

Series

Digit 3— Reheat

C = Cooling Only

E = Electric Heat

W = Hot Water Heat

Digit 4 — Development Sequence

F = Sixth

Digit 5, 6 — Primary Air Valve

04 = 4" inlet (225 cfm)

05 = 5" inlet (350 cfm)

06 = 6" inlet (500 cfm)

08 = 8" inlet (900 cfm)

10 = 10" inlet (1400 cfm)

12 = 12" inlet (2000 cfm

14 = 14" inlet (3000 cfm)

16 = 16" inlet (4000 cfm)

RT = 8" x 14" inlet (1800 cfm)

Note: 10, 12, 14, and 16 not available on low

height units.

Digit 7, 8— Secondary Air Valve Used

00 = N/A

Digit 9 — Fan

A = DS02 Fan (1300 nom cfm)

B = DS03 Fan (1950 nom cfm)

C = PS02 Fan (1160 nom cfm)

P = 02SQ Fan (500 nom cfm)

Q =03SQ Fan (1100 nom cfm)

R = 04SQ Fan (1350 nom cfm)

S = 05SQ Fan (1550 nom cfm)

T =06SQ Fan (1850 nom cfm)

U = 07SQ Fan (2000 nom cfm)

Digit 10, 11— Design Sequence

** = Factory Assigned

Digit 12, 13, 14, 15 — Controls

DD01 = Cooling Only Control

DD02 = N.C. On/Off Hot Water

DD03 = Prop Hot Water

DD04 = Staged On/Off Elec Heat

DD05 = Pulse Width Mod of Elect Heat

DD07 = N.O. On/Off Hot Water

DD11 = VV550 DDC- Controller, Cooling Only

DD12 = VV550 DDC- Control w/N.C. On/Off

HW Valve

DD13 = VV550 DDC- Control w/Prop. Hw

Valve

DD14 = VV550 DDC- Control On/Off Electric

Heat

DD15 = VVV550 DDC- Control w/Pulse Width

Modulation

DD17 = VVV550 DDC- Control w/N.O On/Off

HW Valve

DD41 = UC400 DDC- Basic (No water or

electric heat)

DD42 = UC400 DDC- Basic (Water heat- N.C.

2-position)

DD43 = UC400 DDC- Basic (Water heat-

Modulating)

DD44 = UC400 DDC- Basic (Electric heat-

Staged)

DD45 = UC400 DDC- Basic (Electric heat-

PWM)

DD47 = UC400 DDC- Basic (Water heat- N.O.

2-position)

DD53 = UC400 DDC- Basic plus- Local

(Electric heat- PWM) Remote (Staged EH)

DD58 = UC400 DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.O. 2-position)

DD59 =UC400 DDC- Basic plus Local (Water

heat- Modulating) Remote (Water- N.C.

2-position)

DD60 = UC400 DDC- Basic Plus Local (Water

Heat- N.O. 2-position) Remote Water- N.C.

2-position)

DD61 = UC400 DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.O. 2-position)

DD62 = UC400 DDC- Basic plus- Local

(Electric heat- Staged) Remote (Staged EH)

DD65 = UC400 Basic (Electric Heat

Modulating SCR)

DD66 = UC400 Basic plus- Local (Electric

heat-Modulating SCR) Remote (Staged EH)

Digit 12, 13, 14, 15 — Controls

(continued)

DD71 = UC210 DDC- Basic (No water or

electric heat)

DD72 = UC210 DDC- Basic (Water heat- N.C.

2-position)

DD73 = UC400 DDC- Basic (Water heat-

Modulating)

DD74 = UC210 DDC- Basic (Electric heat-

Staged)

DD75 = UC210 DDC- Basic (Electric heat-

PWM)

DD77 = UC210 DDC- Basic (Water heat- N.O.

2-position)

DD83 = UC210 DDC- Basic plus- Local

(Electric heat- PWM) Remote (Staged EH)

DD84 = UC210 DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.C. 2-position)

DD85 = UC210 DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.O. 2-position)

DD86 = UC210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- Modulating)

DD87 = UC210 DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- Modulating)

DD88 = UC210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.O. 2-position)

DD89 = UC210 DDC-Basic plus- Local (Water

heat- N.C. 2-position) Remote (Water- N.C.

2-position)

DD90 = UC210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.C. 2-position)

DD91 = UC210 DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.O. 2-position)

DD92 = UC210 DDC- Basic plus- Local

(Electric heat- Staged) Remote (Staged)

DD95 = UC210 Basic (Electric Heat

Modulating SCR)

DD96 = UC210 Basic plus- Local (Electric

heat-Modulating SCR) Remote (Staged EH)

DD00 = Trane Actuator Only

ENCL = Shaft Only in Enclosure

FM00 = Other Actuator and Control

FM01 = Trane Supplied Actuator, Other Ctrl

SY71 = Symbio 210 DDC - Basic (Cooling

only)

SY72 = Symbio 210 DDC - Basic (Water

heat- N.C.- 2 position)

SY73 = Symbio 210 DDC - Basic (Water

heat- Modulating)

SY74 = Symbio 210 DDC - Basic (Electric

heat-staged)

SY75 = Symbio 210 DDC - Basic (Electric

heat-PWM)

VAV-PRC012AC-EN

Digit 12, 13, 14, 15 — Controls

(continued)

SY77 = Symbio 210 DDC -Basic (Water heat

-N.O.- 2 position)

SY83 = Symbio 210 DDC- Basic plus- Local

(Electric heat- PWM) Remote (Staged)

SY84 = Symbio 210 DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.C. 2-position)

SY85 = Symbio 210 DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.O. 2-position)

SY86 = Symbio 210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- Modulating)

SY87 = Symbio 210 DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- Modulating)

SY88 = Symbio 210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.O. 2-position)

SY89 = Symbio 210 DDC-Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.C. 2-position)

SY90 = Symbio 210 DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.C. 2-position)

SY91 = Symbio 210 DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.O. 2-position)

SY92 = Symbio 210 DDC- Basic plus- Local

(Electric heat- Staged) Remote (Staged)

SY95 = Symbio 210 DDC - Control with

Modulating SCR

SY96 = Symbio 210 DDC - Space Temp

Control with Local SCR and Remote Staged

Electric heat

SE71 = Symbio 210e DDC - Basic (Cooling

only)

SE72 = Symbio 210e DDC - Basic (Water

heat- N.C.- 2 position)

SE73 = Symbio 210e DDC - Basic (Water

heat- Modulating)

SE74 = Symbio 210e DDC - Basic (Electric

heat-staged)

SE75 = Symbio 210e DDC - Basic (Electric

heat-PWM)

SE77 = Symbio 210e DDC -Basic (Water heat

-N.O.- 2 position)

SE83 = Symbio 210 DDC- Basic plus- Local

(Electric heat- PWM) Remote (Staged)

SE84 = Symbio 210e DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.C. 2-position)

SE85 = Symbio 210e DDC- Basic plus- Local

(Water heat- Modulating) Remote (Water-

N.O. 2-position)

Digit 12, 13, 14, 15 — Controls

(continued)

SE86 = Symbio 210e DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- Modulating)

SE87 = Symbio 210e DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- Modulating)

SE88 = Symbio 210e DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.O. 2-position)

SE89 = Symbio 210e DDC-Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.C. 2-position)

SE90 = Symbio 210e DDC- Basic plus- Local

(Water heat- N.O. 2-position) Remote

(Water- N.C. 2-position)

SE91 = Symbio 210e DDC- Basic plus- Local

(Water heat- N.C. 2-position) Remote

(Water- N.O. 2-position)

SE92 = Symbio 210e DDC- Basic plus- Local

(Electric heat- Staged) Remote (Staged)

SE95 = Symbio 210e DDC - Control with

Modulating SCR

SE96 = Symbio 210e DDC - Space Temp

Control with Local SCR and Remote Staged

Electric heat

Digit 16 — Insulation

A = 1/2” Matte-faced

B = 1” Matte-faced

D = 1” Foil-faced

F = 1” Double Wall

G = 3/8” Closed-cell

Digit 17— Motor Type

D = PSC Motor

E = High-efficiency Electronically

Commutated Motor (ECM)

F = Variable Speed High-efficiency

Electronically Commutated Motor (ECV)

Digit 18— Motor Voltage

1 = 115/60/1

2 = 277/60/1

3 = 347/60/1

4 = 208/60/1

5 = 230/50/1

Digit 19— Outlet Connection

1 = Flanged

2 = Slip–and-Drive Connection

Digit 20— Attenuator

0 = None

B = Suppressor

T = Thinline Suppressor

Digit 21— Water Coil

0 = None

1 = 1 Row, Plenum Inlet Installed RH

2 = 2 Row, Plenum Inlet Installed RH

3 = 1 Row, Discharge Installed LH

4 = 1 Row, Discharge Installed RH

5 = 2 Row, Discharge Installed LH

6 = 2 Row, Discharge Installed RH

A = 1 Row Premium, Water Coil Inlet

B = 2 Row Premium, Water Coil Inlet

C = 1 Row Premium, Hot Coil on Discharge LH

D = 1 Row Premium, Hot Coil on Discharge

E = 2 Row Premium, Hot Coil on Discharge LH

F = 2 Row Premium, Hot Coil on Discharge RH

Digit 22— Electrical Connections

F = Flippable Left and Right Hand

L = Left, Airflow hits in face

R = Right, Airflow hits in face

W = Narrow Corridor LH, High Voltage, Inlet

Facing

X = Narrow Corridor RH, High Voltage, Inlet

Facing

Note: Digits W and X, fan-powered series

only.

Digit 23— Transformer

0 = Not Applicable

Digit 24 — Disconnect Switch

0 = None

W = With

Note: Electric reheat w/door interlocking

power disconnect, cooling only and

water reheat w/toggle disconnect.

Digit 25 — Power Fuse

0 = None

W = With

Digit 26 — Electric Heat Voltage

0 = None

A = 208/60/1

B = 208/60/3

C = 240/60/1

D = 277/60/1

E = 480/60/1

F = 480/60/3

G = 347/60/1

H = 575/60/3

J = 380/50/3

K = 120/60/1

Note: Digit K not available wit low height.

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VAV-PRC012AC-EN

Digit 27, 28, 29— Electric Heat kW

000 = None

010 = 1.0 kW

015 = 1.5 kW

460 = 46.0 kW

Notes:

• 0.5 to 8.0 kW in 1/2 kW

increments

• 8.0 to 18.0 kW in 1 kW

increments

• 18.0 to 46.0 kW in 2 kW

increments

Digit 30 — Electric Heat Stages

0 = None

1 = 1 Stage

2 = 2 Stages Equal

3 = 3 Stages Equal

Note: Digit 3 not available with low height.

Digit 31 — Electric Heat Contactors

0 = None

1 = 24V Magnetic

5 = 0-10 Vdc SCR Heat; UC400

6 = 0-10 Vdc SCR Heat; FMTD/ENCL/DD00

7 = 24V SSR (Solid State Relay)

Notes: SCR cannot be selected with the

following:

• kW>10,208V, 3Ph, Low Height

• kW>22,480V, 3Ph, Low Height

• Voltage = 575V

Digit 32— Air Switch

0 = Not Applicable

W = With

Digit 33— Not Used

0 = Not Applicable

Digit 34 — Actuator

0 = Standard

A = Belimo™ Actuator

G = Trane Analog Actuator (UC210 or UC400

only)

Digit 35 — Wireless Sensors

0 = None

3 = Trane Air-Fi® Wireless Communications

Interface

Note: All sensors selected in accessories.

Digit 36 — Pre-wired Factory

Solutions

0 = None

1 = Factory-mounted DTS

2 = HW Valve Harness

3 = Both DTS/HW Valve Harness

Digit 37 — Bottom Access

0 = None

W = Access Left Side Terminal Unit

Digit 38 —Piping Package

0 = None

A = 2–Way Automatic Balancing

B = 3–Way Automatic Balancing

C = 2-Way Standard Valve Only, Floating

Point Actuator

D = 3-Way Standard Valve Only, Floating

Point Actuator

E = 2-Way Standard Valve Piping Package,

Floating Point Actuator

F = 3-Way Standard Valve Piping Package,

Floating Point Actuator

G = 2-Way Belimo Valve Only, Floating Point

Actuator

H = 3-Way Belimo Valve Only, Floating Point

Actuator

J = 2-Way Belimo Valve Piping Package,

Floating Point Actuator

K = 3-Way Belimo Valve Piping Package,

Floating Point Actuator

L = 2-Way Belimo Valve Only, Analog

Actuator

M = 3-Way Belimo Valve Only, Analog

Actuator

N = 2-Way Belimo Valve Piping Package,

Analog Actuator

P = 3-Way Belimo Valve Piping Package,

Analog Actuator

Digit 39 — Water Valve

0 = None

1 = Trane HW Valve 0.7 Cv

2 = Trane HW Valve 2.7 Cv

5 = Analog HW Valve, Field Provided (UC210

or UC400 only)

6 = Trane HW Valve 1.7 Cv

7 = Trane HW Valve 5.0 Cv

A = Belimo HW Valve, 0.3 Cv

B = Belimo HW Valve, 0.46 Cv

C = Belimo HW Valve, 0.8 Cv

D = Belimo HW Valve, 1.2 Cv

E = Belimo HW Valve, 1.9 Cv

F = Belimo HW Valve, 3.0 Cv

G = Belimo HW Valve, 4.7 Cv

Digit 40 — Flow Rate

0 = None

A = 0.5 gpm, 0.03 l/s

B = 1.0 gpm, 0.06 l/s

C = 1.5 gpm, 0.09 l/s

D = 2.0 gpm, 0.13 l/s

E = 2.5 gpm, 0.16 l/s

F = 3.0 gpm, 019 l/s

G = 3.5 gpm, 0.22 l/s

H = 4.0 gpm, 0.25 l/s

J = 4.5 gpm, 0.28 l/s

K = 5.0 gpm, 0.31 l/s

L = 5.5 gpm, 0.35 l/s

M = 6.0 gpm, 0.38 l/s

N = 6.5 gpm, 0.41 l/s

P = 7.0 gpm, 0.44 l/s

Q = 7.5 gpm, 0.47 l/s

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VAV-PRC012AC-EN

DDC Controls

Controllers

DDC controllers are today’s industry standard. DDC controllers provide system-level data used to

optimize system performance. Variables such as occupied/unoccupied status, minimum and

maximum primary and fan airflow setpoints, current zone temperature and temperature

setpoints, valve position, fan status (on or off, and mode of operation), heat status (on or off), and

air valve size, temperature correction offsets, flow correction values, etc. are available on a

simple twisted-shielded wire pair or communicated wirelessly.

Trane® DDC controllers provide Trane-designed, solid-state electronics intended specifically for

terminal unit control in space comfort applications.

DDC control capabilities include:

• Proportional plus integral control loop algorithm for determining required airflow needed to

control room temperature. Airflow is limited by active minimum and maximum airflow

setpoints.

• Pressure-independent (PI) operation, which automatically adjusts valve position to maintain

required primary airflow. In certain low-flow situations or in cases where the flow

measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode

of operation.

• Cooling and heating control action of air valve. In cooling control action, the DDC controller

matches cooling primary airflow to cooling load. In heating control action, the DDC controller

matches the heating primary airflow to heating load. The DDC controller will automatically

change over to cooling control action if the supply air temperature is below the room

temperature and will automatically change over to heating control action if the supply air

temperature is 10°F or more above the room temperature. If the supply air temperature is

between the room temperature and the room temperature plus 10°F, then the DDC controller

will provide the active minimum primary airflow. The DDC controller first chooses the

Tracer® SC supplied supply air temperature value to use for auto changeover. If this is not

available, it uses the temperature provided by the optional auxiliary temperature sensor. If

this is also not available, it uses the heating/cooling mode assigned by Tracer SC or the DDC

controller’s service tool (Everyware™, Rover™, or Tracer TU).

• Multiple reheat control options including staged electric, staged hot-water (normally on or

normally off), modulating hot-water, and slow pulsed width modulation. Modulating reheat

options utilize a separate reheat proportional-plus-integral control loop from that controlling

airflow into the room. Staged reheat options utilize a control algorithm based on heating

setpoint and room temperature.

• Series or parallel fan can be configured to operate at a constant speed or controlled for

variable-speed operation

• 24 VAC binary input that can be configured as a generic input or as occupancy input. When

the DDC controller is operation with Tracer® SC, the status of the input is provided to Tracer®

SC for its action. In stand-alone operation and when configured for an occupancy input, the

input will control occupancy status of the DDC controller.

• Auxiliary temperature analog input that can be configured for an auxiliary temperature

sensor or a 2-to-10 VDC CO

sensor. When sensor is mounted in the supply air duct

(upstream of the VAV terminal unit) and configured for temperature, the value of the input is

used as status-only by Tracer SC if Tracer SC is providing a supply air temperature to the DDC

controller.

VAV-PRC012AC-EN

Figure 10. Flow sensor single vs. airflow delivery

0.01

0.1

10 100 1,000 10,000

Air Valve Airflow, cfm

Flow Sensor DP (In. wg)

12"

10"

14"

16"

DDC Remote Heat Control Options

The following subsections describe the operating characteristics of the four basic types of

VariTrane™ DDC terminal reheat for fan-powered terminal units.

On/Off Hot Water Reheat

Two stages of on/off hot water reheat are available. The water valves used are two-position and

are either fully opened or fully closed.

Stage 1 heat is energized when the zone temperature drops below the active heating setpoint;

Stage 2 is energized when the zone temperature drops to 1°F (0.56°C) or more below the active

heating setpoint. Stage 2 is de-energized when the zone temperature rises to warmer than 0.5°F

(0.28°C) below the active heating setpoint; Stage 1 is de-energized when the zone temperature

rises to warmer than 0.5°F (0.28°C) above the active heating setpoint.

Modulating Hot Water Reheat

Modulating hot water reheat uses 3-wire floating-point-actuator technology and analog actuator

technology.

The degree to which the hot water valve opens is dependent on both the degree that zone

temperature is below the active heating setpoint and the time that the zone temperature has

been below the active heating setpoint. If not already closed, the water valve fully closes when

the zone temperature rises above the active heating setpoint by 0.5 °F (0.28 °C).

On/Off Electric Reheat

Two stages of staged electric reheat are available.

Stage 1 heat is energized when the zone temperature drops below the active heating setpoint;

Stage 2 is energized when the zone temperature drops to 1°F (0.56°C) or more below the active

heating setpoint. Stage 2 is de-energized when the zone temperature rises to warmer than 0.5°F

(0.28°C) below the active heating setpoint; Stage 1 is de-energized when the zone temperature

rises to warmer than 0.5°F (0.28°C) above the active heating setpoint.

DDDDCC CCoonnttrroollss

VAV-PRC012AC-EN

Pulse-Width Modulation of Electric Heat

Electric heat is modulated by energizing for a portion of a three-minute time period. This allows

exact load matching for energy efficient operation, and optimum zone temperature control. One

or two stages can be used.

The amount of reheat supplied is dependent on both the degrees that zone temperature is below

the active heating setpoint and the time that the zone temperature has been below the active

heating setpoint. If not already off, reheat de-energizes when the zone temperature rises 0.5°F

(0.28°C) above the active heating setpoint. The Stage 1 “on” time is proportional to the amount

of reheat required. For example, when 50% of stage 1 capacity is required, reheat is on for 90

seconds and off for 90 seconds. When 75% of stage 1 capacity is required, reheat is on for 135

seconds and off for 45 seconds. When 100% of stage 1 capacity is required, reheat is on

continuously.

Stage 2 uses the same “on” time logic as stage 1 listed above, except stage 1 is always

energized. For example, when 75% of unit capacity is required, stage 1 is energized continuously,

and stage 2 is on for 90 seconds and off for 90 seconds.

DDDDCC CCoonnttrroollss

VAV-PRC012AC-EN

Heat Controls

24-VAC Fan/Staged

2nd

1st

Fan

Load: 10 VA (MAGN)

Load: 12 VA (MERC)

Load: 6.5 VA

FAN RELAY

HEATER CONTROL BOX

3rd

Damper

Actuator

Line Voltage

COM

CCW

24 VAC, 50 VA

Transformer

Load: 4 VA

24-VAC to

Customer

Controls

By Others

Damper Controls

24-VAC

Load: 4 VA

Actuator

Damper

24-VAC

Damper Controls

By Others

COM

CCW

NOTES:

Factory-installed

Field Wiring

Optional or installed by others

Only available with fan-powered units.

Located in Heater Terminal box.

DD00—Available for all VariTrane Units

(Trane actuator for field-installed DDC controls)

A unit controller is not provided. The air damper actuator is provided with an integral screw terminal block.

The fan contactor (fan-powered units), 24-VAC control power transformer (optional for single- and dual-duct

units), and factory-installed electric heater contactor wires are attached to the outside of the unit for field

connection of controls.

Located in Control Box on all fan-powered units.

DDDDCC CCoonnttrroollss

VAV-PRC012AC-EN

1st stage

2nd stage

3rd stage

24VAC (hot) common

CCW

COM

24 VAC

24 VAC, 50va

Standard – (Fan-pow

ered)

Transformer

Customer-furnished

Controller

Electric

Reheat

Contactors

Hot Water

Reheat

Fan

Relay

Actuator

Customer-furnished

or Trane-supplied

Trane-supplied

(Fan-powered only)

Trane-supplied

Available on all VariTrane Units

FM00 – Customer-supplied actuator and DDC controller factory-installed.

FM01 – Trane actuator and customer-supplied DDC controller factory-installed

Optional or installed by others

NOTES:

Factory-installed

Field Wiring

Optional

Trane-supplied

water valve

field-wired

to controller.

Airflow

Sensor

LO HI

Trane-supplied

All customer furnished controllers and actuators are installed and wired per control manufacturer's specifications.

Metal control enclosure is standard.

NEMA-1 Enclosure provided.

Symbio 210, Symbio 210e, Tracer UC400 and UC210 Programmable

BACnet Controllers

Introduction

The Symbio 210, Symbio 210e, Tracer® UC210 and UC400 direct digital control unit control

modules are microprocessor-based terminal unit controllers with non-volatile memory which

provide accurate airflow and room temperature control of Trane and non-Trane VAV air terminal

units. Symbio 210, Symbio 210e, Tracer® UC210 and UC400 provide simple open protocol to

allow integration of Trane VAV units and controls into other existing control systems. The

controller can operate in pressure-independent or pressure-dependent mode and uses a

proportional plus integral control algorithm.

The controller monitors zone temperature setpoints, zone temperature and its rate of change and

valve airflow (via flow ring differential pressure). The controller also accepts an auxiliary duct

temperature sensor input or a supply air temperature value from Tracer SC. Staged electric heat,

pulse width modulated electric heat, modulating hot water heat or on/off hot water heat control

are provided when required. The control board operates using 24-VAC power. The Symbio 210,

Symbio 210e, UC210 and UC400 are also members of the Trane Integrated Comfort™ systems

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VAV-PRC012AC-EN

(ICS) family of products. When used with a Tracer® SC or other Trane controllers, zone grouping

and unit diagnostic information can be obtained. Also part of ICS is the factory-commissioning of

parameters specified by the engineer. (See "Factory-Installed vs. Factory-Commissioned" in the

Features and Benefits section for more details).

The Symbio 210, Symbio 210e, Tracer® UC400 and UC210 controllers are programmable general

purpose BACnet®, microprocessor-based, Direct Digital Controllers (DDC). When factory

installed on Trane (variable air volume) VAV terminal units, they are factory downloaded with

appropriate VAV programs and configuration settings. Trane VAV units have been made with

either pneumatic, analog electronic, or microprocessor controls (DDC VAV).

The Symbio 210, Symbio 210e, Tracer® UC400 or UC210 controller can be configured from the

factory with three different application programs: space temperature control (STC), ventilation

flow control (VFC), and flow tracking control (FTC):

• STC — Modulates a VAV's damper blade based on a zone temperature, measured airflow,

and setpoints to continuously control conditioned air delivery to the space. The volume of

incoming air is monitored and the damper adjusts to provide accurate control independent of

the duct pressure. The damper modulates between operator setpoints depending on space

conditions. Additionally, fan speed can be modulated and heat outputs may be energized

depending on the application.

• VFC — Can be applied to a VAV terminal and used to temper cold outdoor air (OA) that is

brought into a building for ventilation purposes. The tempered air is intended to supply an

air-handling unit (AHU), which provides comfort control to the zones it is serving. The VAV

terminal supplies the correct amount of ventilation air, and when reheat is added, tempers

the ventilation air to reduce the load on the air handler by sensing the discharge air

temperature of the VAV unit and controlling its long-term average to the discharge air

temperature setpoint.

• FTC — Two VAV units with Tracer UC210 or UC400 controllers working together provide flow

tracking control. One controller is configured from the factory with the space temperature

control and the other is downloaded with the FTC program. The STC airflow output is bound

to the flow tracking controller airflow setpoint input. The flow tracking controller adds the

configured airflow tracking offset (positive or negative) to the airflow setpoint (communicated

airflow setpoint) and controls the airflow to this setpoint.

The Symbio 210, Symbio 210e, Tracer UC400 or UC210 controller is BTL compliant with

BACnet®, an open standard building automation protocol. It meets the application specific

controller (ASC) profile per ASHRAE 135–2004. This allows the Tracer® UC400 or UC210

controller to integrate with other BACnet® systems.

Specifications

SSuuppppllyy VVoollttaaggee

24 VAC, 50/60 Hz

MMaaxxiimmuumm VVAA LLooaadd

NNoo HHeeaatt oorr FFaann

8 (9.5 for Symbio 210/210e)VA (Board, Transducer, Zone Sensor, and Actuator)

NNoottee:: If using field-installed heat, 24 VAC transformer should be sized for additional load.

OOuuttppuutt RRaattiinnggss

Actuator Output: 24 VAC at 12 VA

1st Stage Reheat: 24 VAC at 12 VA

2nd Stage Reheat: 24 VAC at 12 VA

3rd Stage Reheat: 24 VAC at 12 VA

BBiinnaarryy IInnppuutt

24 VAC, occupancy or generic.

AAuuxxiilliiaarryy IInnppuutt

Can be configured for discharge or primary air temperature sensor.

OOppeerraattiinngg EEnnvviirroonnmmeenntt

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VAV-PRC012AC-EN

32 to 140°F, (0 to 60°C)

5% to 95% RH, Non-condensing

SSttoorraaggee EEnnvviirroonnmmeenntt

-40 to 180°F (-40 to 82.2°C),

5% to 95% RH, Non-Condensing

PPhhyyssiiccaall DDiimmeennssiioonnss

Width: 5.5–in. (139.7 mm)

Length: 4.5–in. (69.85 mm)

Height: 2.0–in. (44.45 mm)

CCoonnnneeccttiioonnss

1/4–in. (6.35 mm) Stab Connections

CCoommmmuunniiccaattiioonnss

Tracer® UC400– Space Comfort Control (SCC) profile with FTT-10 transceiver

22 awg. unshielded level 4 communication wire

FFaann CCoonnttrrooll

Series fan: On unless unoccupied and min. flow has been released. Constant-speed or variable-

speed fan control available.

Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when

zone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C). Constant-

speed or variable-speed fan control available.

HHeeaatt SSttaaggiinngg

Staged electric or hot water modulating or pulse-width modulation

Available Inputs

Inputs include a twisted/shielded communication link, zone sensor, duct temperature sensors

(optional), occupancy sensor (optional), discharge air temperature (DAT) and/or supply air

temperature (SAT), CO

sensor, and 24 VAC power. In addition to the points used for the VAV

application, the spare inputs and outputs on the Tracer UC400 or UC210 controller may be used

for ancillary control, which can be programmed using Tracer TU Tracer Graphical Programming

2 (TGP2).

NNoottee:: For more information on using spare points, see BAS-SVX20*-EN Tracer UC400

Programmable Controller Installation, Operation, and Maintenance.

General Features and Benefits

Assured Accuracy

• Proportional-plus-integral control loop algorithm for determining required airflow needed to

control zone temperature. Airflow is limited by active minimum and maximum airflow

setpoints.

• Pressure-independent (PI) operation that automatically adjusts air valve position to maintain

required primary airflow. In certain low-flow situations or in cases where the flow

measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode

of operation.

• When combined with the patented Trane flow ring and pressure transducer, flow is

repeatable to +/- 5% accuracy across the pressure independent (PI) flow range. (See Valve/

Controller Airflow Guidelines section).

• Improved 2-Point air balancing is available – Assures optimized flow-sensing accuracy across

the operating range. This provides a more accurate airflow balancing method when

compared to typical single-point flow correction air balancing.

• Analog input resolution of +/- 1/8°F within the comfort range maximizes zone temperature

control yielding excellent comfort control.

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VAV-PRC012AC-EN

Reliable Operation

• Built for life – Trane products are designed to stand the test of time, with a proven design life

that exceeds 20 years.

• Fully factory tested – Fully screened and configured at the factory. All features are tested

including fan and reheat stage energization, air valve modulation, and controller inputs and

outputs.

Safe Operation

• All components, including the controller, pressure transducer, transformer, etc. are mounted

in a NEMA 1 sheet metal enclosure and are tested as an assembly to UL1995 standards. The

result is a rugged and safe controller, and thus, overall unit.

• When in PI-mode, electric heat is disabled when the sensed flow is below the minimum

required.

• Hot-water coil units in ventilation flow control (VFC) have a freeze protection algorithm to

protect the water coil and the internal space from water damage. This is accomplished by

driving the water valve to maximum position on alarm conditions.

System-level Optimization

Trane controllers are designed to integrate into Trane Tracer® SC and leverage clear and clean

unit-controller related data for system level control decisions. Integrating a Trane UC210 or

UC400 controller into a Tracer® SC Control System provides the next step in building

automation.

Specifically, system-level decisions on how to operate all components can be made. Energy

efficient optimization strategies, like static pressure optimization, can be employed with the

simple press of a button. The end-result is the most efficient and reliable building automation

system available.

Simplified Installation

Factory Commissioned Quality – All Trane DDC VAV controllers are factory-commissioned. This

means that the DDC boards are powered and run-tested with your specific sequence parameters.

They are connected to a communication link to make sure that information and diagnostic data

function properly. Before any unit ships it must pass a rigorous quality control procedure. You

can be assured that a Trane VAV unit with Trane DDC controls will work right out of the crate.

Tenant-Finish Heat Mode – In some office projects, the building is being constructed as tenants

are being identified. Tenant-finish heat mode is designed for applications when a given floor has

not been occupied. The main AHU is used for heat and because the internal furnishings are not

complete, the sensors have not been installed. In this case, the primary valve drives open using

the heat of the main AHU to keep plumbing lines from freezing. Operation of the VAV unit fan

(series or parallel) remains unaffected.

Controller Flexibility

• 24 Vac binary input that can be configured as a generic input or as occupancy input. When the

DDC controller is operating with Tracer® SC, the status of the input is provided to Tracer® SC

for its action. In stand-alone operation and when configured for an occupancy input, the input

will control occupancy status of the DDC controller.

• Auxiliary temperature analog input configured for an auxiliary temperature sensor. The value

of the input is used as status-only by Tracer® SC if it is providing a supply air temperature

(upstream of the terminal unit) to the DDC controller. Otherwise, the input will be used for

determining heating/cooling control action of the VAV unit. When the auxiliary temperature

sensor is located in the discharge of the unit, and attached to a Trane Tracer® SC BAS,

additional test sequencing and reporting is available to maximize VAV system capabilities

and simplify system commissioning.

• Symbio 210, Symbio 210e, Tracer® UC400 or UC210 Programmable BACnet® Controller

certified performance ensures that a Trane VAV unit with controller will provide state-of-the-

art, consistent open communication protocol for integration with the industry’s latest (Non-

Trane) building automation control systems, including Johnson Control, Andover, Siemens,

Honeywell, etc.

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VAV-PRC012AC-EN

• CO

demand controlled ventilation enables the terminal unit controller to adjust ventilation

air flow setpoint based on the current occupancy in the zone. Trane demand controlled

ventilation strategies are pre-defined for simplified application and can be easily customized

to meet the needs of a specific system.

• Supports discharge air temp reset with modulating hot-water and SCR electric heat on units

with mulitpoint-DAT sensor.

Control Logic

Direct Digital Control (DDC) controllers are today’s industry standard. DDC controllers share

system-level data to optimize system performance (including changing ventilation requirements,

system static pressures, supply air temperatures, and so on). Variables available via a simple

twisted-shielded wire pair include occupied/unoccupied status, minimum and maximum airflow

setpoints, zone temperature and temperature setpoints, air valve position,primary airflow, fan

status (on or off), fan operation mode (parallel or series), reheat status (on or off), VAV unit type,

air valve size, temperature correction offsets, flow correction values, ventilation fraction, and so

on.

With the advent of the BTL compliant Tracer® UC400 and UC210 controllers, the most reliable

VAV controller is now available for ANY system. Gone are the days of being locked into a single

supplier. Trane DDC controllers provide Trane-designed solid-state electronics intended

specifically for VAV applications including:

• Space temperature control

• Ventilation flow control (100% outside air applications)

• Flow tracking space pressurization control

Space Temperature Control

Space temperature control (STC) logic modulates primary airflow, reheat (either local or remote),

and fan airflow to maintain the desired temperature in the zone. Following are high-level

descriptions of the STC control logic during occupied mode, for various fan and reheat

configurations.

Series Fan-Powered Terminal:

Constant-Speed Fan Control

The terminal fan operates continuously during all occupied modes.

When the zone temperature is in the deadband between the active heating and cooling setpoints,

the controller reduces primary airflow to the minimum primary airflow setpoint, while reheat is

off.

When the zone temperature rises above the active cooling setpoint, the controller modulates

primary airflow, between the minimum and maximum airflow setpoints, to maintain zone

temperature at the active cooling setpoint, while reheat is off.

For units equipped with staged heat (on/off hot water or on/off electric):

When the zone temperature drops below the active heating setpoint, the controller stages heat

on/off to maintain zone temperature at the active heating setpoint, while primary airflow is

controlled to the minimum heating primary airflow setpoint. Stage 1 heat is energized when the

zone temperature drops below the active heating setpoint; Stage 2 is energized when the zone

temperature drops to 1°F (0.56°C) or more below the active heating setpoint. Stage 2 is de-

energized when the zone temperature rises to warmer than 0.5°F (0.28°C) below the active

heating setpoint; Stage 1 is de-energized when the zone temperature rises to warmer than 0.5°F

(0.28°C) above the active heating setpoint.

For units equipped with modulated heat (modulated hot water or SCR electric):

When the zone temperature drops below the active heating setpoint, the controller modulates

the hot-water valve (or SCR electric heater) to maintain zone temperature at the active heating

setpoint, while primary airflow is controlled to the minimum heating primary airflow setpoint.

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VAV-PRC012AC-EN

Figure 11. Series fan with constant-speed fan control

Deadband

Cooling Loop Signal

Maximum

Reheat

Minimum

Primary

Airflow

Maximum

Primary Air

Reheat Off

Fan Cool

Maximum

Speed

Reheat Capacity %

Fan Heat

Maximum

Speed

Heating Loop Signal

100

Primary Airflow %

Fan Airflow %

Series Fan-Powered Terminal:

Variable-Speed Fan Control

When the zone temperature is in the deadband between the active heating and cooling setpoints,

the controller reduces primary airflow to the minimum primary airflow setpoint and operates the

fan at the minimum fan airflow setpoint, while reheat is off.

When the zone temperature rises above the active cooling setpoint, the controller modulates

both primary airflow and fan airflow simultaneously, between their respective minimum and

maximum airflow setpoints, to maintain zone temperature at the active cooling setpoint, while

reheat is off.

For units without heat or equipped with staged heat (on/off hot water or on/off electric):

When the zone temperature drops below the active heating setpoint, the controller modulates

the fan between its minimum and maximum fan airflow setpoints to maintain zone temperature

at the active heating setpoint, while primary airflow is at the minimum primary airflow setpoint

and reheat remains off. If the requested heating capacity has increased to the point where the fan

has reached its maximum fan airflow setpoint, the controller stages heat on/off to maintain zone

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VAV-PRC012AC-EN

temperature at the active heating setpoint, while the fan continues to operate at the maximum

fan airflow setpoint and primary airflow remains at the minimum primary airflow setpoint.

Figure 12. Series fan with variable-speed fan control and staged heat

Deadband

Cooling Loop Signal

Maximum

Reheat

Minimum

Fan Speed

Minimum

Primary

Airflow

Maximum

Primary Air

Reheat Off

Fan Cool

Maximum

Speed

Reheat Capacity %

Fan Heat

Maximum

Speed

Heating Loop Signal

100 0

100

Primary Airflow %

Fan Airflow %

Stage Heating

Stage

Heating

For units equipped with modulated heat (modulated hot water or SCR electric):

When the zone temperature drops below the active heating setpoint, the controller modulates

the hot-water valve (or SCR electric heater) to maintain zone temperature at the active heating

setpoint, while primary airflow is at the minimum primary airflow setpoint and the fan is at the

minimum fan airflow setpoint. If the requested heating capacity has increased to the point where

the discharge air temperature reaches the design heating discharge air temperature setpoint

(adjustable), the controller modulates the fan between its minimum and maximum fan airflow

setpoints to maintain zone temperature at the active heating setpoint, while the hot-water valve

(or SCR electric heater) modulates to maintain discharge air temperature at the design heating

discharge air temperature setpoint and primary airflow remains at the minimum primary airflow

setpoint. If the requested heating capacity has increased to the point where the fan reaches the

maximum fan airflow setpoint, the controller modulates the hot-water valve (or SCR electric

heater) to maintain zone temperature at the active heating setpoint, while the fan continues to

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VAV-PRC012AC-EN

operate at the maximum fan airflow setpoint and primary airflow remains at the minimum

primary airflow setpoint.

Figure 13. Series fan with variable-speed fan control and modulated heat

Deadband

Cooling Loop Signal

Reheat DAT

High Limit

Minimum

Fan Speed

Minimum

Primary

Airflow

Maximum

Primary Air

Reheat Off

Fan Cool

Maximum

Speed

Reheat Capacity %

Fan Heat

Maximum

Speed

Heating Loop Signal

100 0

100

Primary Airflow %

Fan Airflow %

Stage

Heating

Stage

Heating

Reheat DAT

Heat Set

Point + 20F

Stage

Heating

Parallel Fan-Powered Terminal:

Intermittent, Constant-Speed Fan Control

When the zone temperature is in the deadband between the active heating and cooling setpoints,

the controller reduces primary airflow to the minimum primary airflow setpoint, while the fan

and reheat are off.

When the zone temperature rises above the active cooling setpoint, the controller modulates

primary airflow, between the minimum and maximum primary airflow setpoints, to maintain

zone temperature at the active cooling setpoint, while the fan and reheat are off.

When the zone temperature is below the fan on/off setpoint (active heating setpoint plus fan

offset), the controller turns on the fan, while primary airflow is controlled to the minimum

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VAV-PRC012AC-EN

primary airflow setpoint and the reheat remains off. The fan is turned off when the zone

temperature rises to warmer than 0.5°F (0.28°C) above the fan on/off setpoint.