Trane VariTrac VAV-SVU01A-EN Manual

VAV-SVU01A-EN
Controller
Operator Guide
VariTracTM
Central Control Panel

VAV-SVU01A-EN
VariTrac Central Control Panel Operation Guide
This guide and the infor ation in it are the property of A erican Standard
Inc. and shall not be used or reproduced in whole or in part, except as
intended, without the written per ission of A erican Standard Inc. Since
Trane has a policy of continuous product i prove ent, it reserves the right
to change design and specification without notice.
Use of the software contained in this package is provided under a software
license agree ent. Unauthorized use of the software or related aterials
discussed in this anual can result in civil da ages and cri inal penalties.
The ter s of this license are included with the co pact disc. Please read
the thoroughly.
Trane has tested the syste described in this anual. However, Trane does
not guarantee that the syste contains no errors.
Trane reserves the right to revise this publication at any ti e and to ake
changes to its content without obligation to notify any person of such
revision or change.
Trane ay have patents or pending patent applications covering ite s in
this publication. By providing this docu ent, Trane does not i ply giving
license to these patents.
The following are trade arks or registered trade arks of Trane: Co fort
Manager, Reliatel, Tracker, Trane, VariTrac, VariTrane, and Voyager.
Windows is a registered trade ark of Microsoft Corporation.
Printed in the U.S.A.
© 2002 A erican Standard Inc. All rights reserved.

VAV-SVU01A-EN i
About This Guide .................................................. 1
VariTrac CCP Na ing Conventions ...............................................................1
Cautionary State ents ..................................................................................2
Related Literature ...........................................................................................2
VariTrac History .................................................... 3
Feature Su ary ................................................. 5
New Features ..................................................................................................5
Functional Enhance ents .............................................................................6
Increased Zone Count ..............................................................................6
Discharge Air Control...............................................................................6
Supply Air Te pering...............................................................................6
Feature Su ary ....................................................................................6
CO2 Based De and Control Ventilation ..................................................6
Zone Occupied Standby Function ..........................................................6
Syste Balance Mode .............................................................................6
Global Sensor Setpoint Li it Set-up ......................................................6
Software Change History ..................................... 7
General Infor ation ............................................. 9
Central Control Panel ..................................................................................... 9
Co unicating Sensor–Bypass Control Asse bly.....................................9
Bypass Da per(s) ........................................................................................ 10
Zone Da per with a UCM and Zone Te perature Sensor ........................ 10
Contents
Chapter 5
Chapter 4
Chapter 3
Chapter 2
Chapter 1

VAV-SVU01A-EN ii
Table of Contents
Sequence of Operation....................................... 11
Central Control Panel ................................................................................... 11
CCP Start-up ........................................................................................... 11
Bypass Syste Calibration ................................................................... 11
Static Pressure Bypass ..........................................................................12
Heat/Cool Mode Decision for Zones ..................................................... 12
Zone Voting for Syste Heat or Cool ................................................... 13
UCM Zone Tagging for No Vote ............................................................. 13
Zone Heat/Cool Call Strength ................................................................ 14
Heat/Cool Decision for the CCP............................................................. 14
Heat/Cool Changeover for the CCP ....................................................... 15
Heat/Cool Changeover fro Opposite Strong Callers......................... 15
Heat/Cool Staging and Discharge Air Control ......................................15
Morning War -Up/Precool Mode ......................................................... 16
Manual Heat/Cool Mode Control .......................................................... 16
Priority Shutdown .................................................................................. 17
Voyager/Reliatel Rooftop Operation versus Binary Output Control ... 17
2 Heat/2 Cool versus Heat Pu p Operation ......................................... 18
Spare Binary Output Control ................................................................. 18
Auxiliary Heat Lockout ........................................................................... 18
Occupied Priority Local Heat ................................................................. 18
Unoccupied Priority Local Heat............................................................. 19
Unoccupied Control ............................................................................... 19
VariTrac CCP Group Functions ..............................................................20
Group Occupied/Unoccupied ........................................................ 20
Ti ed Override ............................................................................... 21
Group Overrides .............................................................................21
Syste Balance Mode ...........................................................................22
CO2 -Based De and Control Ventilation...............................................22
Global Sensor Setpoint Li it Setup ..................................................... 23
Chapter 6

VAV-SVU01A-EN iii
Unit Control Module (UCM).........................................................................23
UCM Start-Up .........................................................................................23
Setpoints ................................................................................................24
Para eters .............................................................................................25
Da per Control......................................................................................25
Heat/Cool Mode Decision for Zones .....................................................26
Local Heat Control .............................................................................26
Priority Local Heat .................................................................................. 27
Stand-alone Control ............................................................................... 27
UCM CO2 Input for VariTrac De and-Controlled Ventilation ..............28
Occupied/Unoccupied Mode .................................................................29
UCM Zone Occupied Standby Function ...............................................29
Drive to Maxi u .................................................................................29
Override to Unoccupied ........................................................................ 30
Failure Modes.........................................................................................30
UCM Interface ........................................................................................30
Zone Sensor Operations .............................................................................. 31
Zone Te perature .................................................................................. 31
Zone Setpoint Control ........................................................................... 31
Ti ed Override and Cancel ...................................................................31
Mode Interface for Re ote Co unications .........................................32
Mode Require ents for the VariTrac CCP .........................................32
Configuring the External Mode .........................................................32
Connecting the Mode to the VariTrac CCP ........................................ 32
Mode Operation .................................................................................. 33
VariTrac CCP Interface ..................................................................................33
CCP Operator Display ............................................................................33
VariTrac PC Software.............................................................................. 33
Tracker Version 10 Panel ........................................................................33
Chapter 6
cont’d

VAV-SVU01A-EN iv
Table of Contents
Delivered VAV Operation .................................... 35
What “Delivered VAV” Is ..............................................................................35
What “Delivered VAV” Is Not .......................................................................35
Syste Operating Overview........................................................................36
Zone Count .............................................................................................36
Auto atic Configuration and Start-up ................................................. 36
Morning War -Up ................................................................................. 36
Supply Air Te perature Control ............................................................36
Supply Air Setpoint Reset...................................................................... 37
Dayti e War -Up.................................................................................. 37
Unoccupied Control ............................................................................... 37
Supply Air Pressure Control .................................................................. 38
Supply Air Pressure Li iting.................................................................38
Fan Pressure Opti ization .................................................................... 38
Power Exhaust Control .......................................................................... 38
CO2 -Based De and-Controlled Ventilation ......................................... 39
Syste Calibration.................................................................................39
Zone Occupied Standby Function ........................................................ 39
Global Sensor Setpoint Li it Setup ..................................................... 40
Syste Balance Mode ...........................................................................40
Using the Operator Display ................................ 41
Overview ....................................................................................................... 41
Screen Layout ............................................................................................... 42
Title Bar .................................................................................................. 42
Navigation Buttons ................................................................................ 42
Selection Buttons ................................................................................... 42
Ho e Screen ................................................................................................44
Operation Screens ........................................................................................ 45
Branch Selection Screen ........................................................................ 45
Chapter 7
Chapter 8

VAV-SVU01A-EN v
Data Display Screens ................................................................................... 46
Data Entry Screens ....................................................................................... 46
Analog Data Entry Screen ..................................................................... 47
Alphanu eric Data Entry Screen..........................................................48
Confir ation Screens .................................................................................. 49
View Procedures ...........................................................................................51
Deter ine Area Te perature .................................................................51
Deter ine Area Te perature Setting ....................................................51
Adjust Area Te perature Setting .......................................................... 52
Deter ine Area Occupancy................................................................... 53
Acquire Detailed Area Occupancy Schedule Status ............................ 53
Override Area Occupancy......................................................................54
Cancel Area Override ............................................................................. 54
Acquire Detailed Area Status and Setup .............................................. 53
Alar Procedures .........................................................................................54
View VariTrac Diagnostics......................................................................54
Schedule Procedures....................................................................................61
Change Daily Schedule Na e ...............................................................61
Change Daily Schedule Start and Stop Ti es ......................................62
Add Me ber to Daily Schedule ............................................................ 64
Re ove Me ber fro Daily Schedule ................................................. 65
View List of Daily Schedules and Check Occupancy............................ 66
View a Daily Schedule and Schedule Me bers ...................................66
View Unscheduled Me bers ................................................................ 67
After Hours Procedures ................................................................................69
Start or Restart an Area Ti ed Override ...............................................69
Start or Restart Ti ed Override of a Single Schedule .........................72
Start or Restart All Ti ed Override Schedules ..................................... 72
Cancel a Single Area Ti ed Override ...................................................72
Cancel Ti ed Override of a Single Schedule ....................................... 73
Cancel Ti ed Override of All Schedules ............................................... 73
Chapter 8
cont’d

VAV-SVU01A-EN vi
Table of Contents
Advanced Functions ........................................... 75
CCP Setup and Service.................................................................................75
CCP Setup ............................................................................................... 75
Set the Current Ti e ....................................................................... 76
Set the Current Date ....................................................................... 76
Set the Ti e For at ........................................................................ 77
To Change the Units of Display .....................................................77
Service and Testing ................................................................................ 77
Operator Display Para eters .........................................................78
CCP Hardware and Software Functions ........................................ 80
Syste Setup and Status.............................................................................83
Syste Setup .........................................................................................83
Syste Na e..................................................................................84
HVAC Unit Type ............................................................................... 84
Control Mode .................................................................................. 84
Supply Air Te pering ..................................................................... 84
Discharge Cooling Setpoint ........................................................... 84
Discharge Heating Setpoint ........................................................... 84
Mini u Opposite Callers ............................................................85
Mini u Opposite Strong Callers ................................................85
Static Pressure Setpoint Multiplier ................................................ 86
Syste Balance Mode .................................................................... 87
Adjust Groups for Balance Mode .................................................. 88
Disabling the Syste Balance Mode .............................................89
Changing Li its Globally ...............................................................89
Calibrate Now .................................................................................90
Syste Status ........................................................................................91
Chapter 9

VAV-SVU01A-EN vii
Zone Setup and Status.................................................................................96
Zone Setup .............................................................................................96
Zone Na e......................................................................................97
Heat/Cool Vote ................................................................................. 97
Use Local Setpoint .......................................................................... 97
Flow Override..................................................................................97
Unoccupied Cooling Setpoint ........................................................98
Occupied Cooling Setpoint ............................................................98
Occupied Heating Setpoint ............................................................98
Unoccupied Heating Setpoint ........................................................98
Zone Sensor Setpoint Li its.......................................................... 99
Cooling High Li it ..........................................................................99
Heating High Li it ..........................................................................99
Cooling Low Li it ...........................................................................99
Heating Low Li it ...........................................................................99
Airflow Maxi u Position .......................................................... 100
Airflow Cooling Mini u Position ............................................. 100
Airflow Heating Mini u Position ............................................. 100
Local Heat Mini u Position (UCM 4.0 and later) .................... 100
Occupancy Sensor Setup (UCM 4.0 and later) ........................... 101
Aux Sensor Set To (UCM 4.0 and later) ....................................... 101
Zone Status .......................................................................................... 102
Group Setup ......................................................................................... 104
Group Na e ................................................................................. 105
Vent Mode ..................................................................................... 105
Flow Override................................................................................ 105
Energy Saver Mode ...................................................................... 105
View or Edit Current Group Me bers ......................................... 105
cont’d
Chapter 9

VAV-SVU01A-EN viii
Table of Contents

VAV-SVU01A-EN 1
About This Guide
This manual describes the steps required to properly set up and operate VariTrac
changeover-bypass variable air volume VAV) systems, delivered VAV systems,
and the VariTrac central control panel CCP). The information in this guide
includes:
VariTrac History. A brief overview of the VariTrac product history.
Feature Summary. A summary of the new features and enhancements of
VariTrac 3).
Software Change History. A chronology of version changes to the VariTrac CCP
embedded software.
ntroduction to VariTrac. General information about the VariTrac CCP.
VariTrac Operation Overview. Basic operation information covering startup,
heat/cool decisions, zone controller and zone sensor operations, and modem
interface.
Delivered VAV Operation Overview. Basic delivered VAV operation information
covering startup, heat/cool decisions, zone controller and zone sensor operations,
and modem interface.
Using the Operator Display. Information and procedures for navigating through
the operator display menus, including Home, View, Alarms, Schedules, and After
Hours.
Advanced Functions. Information for advanced users, including CCP setup and
service, system setup and status, zone setup and status, and group setup.
VariTrac CCP Na ing Conventions
The use of the name “VariTrac CCP” in this manual implies the VariTrac central
control panel and the VariTrac CCP embedded system software. Where
information is unique to one model, that model is specified.
Chapter 1

VAV-SVU01A-EN
2
About This Guide
Cautionary State ents
The following cautionary statements signal procedures or conditions that
require particular attention. Personal safety and the proper operation of
the system depend upon the strict observance of these precautions.
WARN NG
ndicates a potentially hazardous situation, which, if not avoided, could
result in serious injury or death.
CAUT ON
ndicates a potentially hazardous situation, which, if not avoided, may
result in minor or moderate injury.
CAUT ON
ndicates a situation in which property-damage-only accidents could occur.
t is also used to alert against unsafe practices.
MPORTANT
Alerts installer, servicer, or operator to potential actions that could cause the
product or system to operate improperly, but will not likely result in potential for
damage.
Related Literature
The following literature is referred to or pertains to equipment referred to
in this manual.
• VariTrac CCP installation guide, VAV-SVN03A-EN
• VAV UCM installations and operations, VAV-SVX01B-EN
• Voyager service literature
• Reliatel service literature

VAV-SVU01A-EN 3
VariTrac History
With the introduction of VariTrac in 1989, Trane brought their expertise in variable
air volume VAV) controls into the changeover-bypass zoning market.
The concept of changeover-bypass zoning brings the flexibility and comfort of VAV
systems into the light commercial unitary market, at an affordable price.
The first generation of VariTrac was a 16-zone pressure dependent system. The
zone dampers featured the same electronic zone controller Trane developed for its
VAV boxes, operating in the pressure dependent mode. The heart of the system
was the Comfort Manager™, a panel which was designed to manage the HVAC
unit, bypass damper functions, and changeover decisions. The functional concept
of this original system continues to be the backbone of today’s zoning system.
In the early 90s, two important enhancements were added to the system:
• Trane’s new Comm4 communications link for the damper controllers
• The ability to directly communicate with Trane’s new Voyager UCP electronic
rooftop unit controls
Trane introduced the second generation of VariTrac in 1995. This generation
featured the central control panel as the functional replacement for Comfort
Manager. The new panel consisted of a resin enclosure, optional relay board for
24 VAC unit control, and a move to static pressure for bypass control. Improved
changeover control was added to the operating system, and the zone damper
controls were upgraded to UCM Version 3.
Trane introduced a new generation of VariTrac controls in 2002. This generation
kept all the great features of the original VariTrac system, plus added new features
and enhancements. The enhancements were designed to make the 2002
generation of VariTrac the simplest changeover-bypass zoning system to install,
commission, and service of any light commercial controls system available today.
Chapter 2

VAV-SVU01A-EN4
VariTrac History

VAV-SVP01A-EN 5
Feature Su ary
New Features
CCP with three-piece enclosure design and optional operator display
Quick snap-in optional relay board with easy-to-wire terminal strip
Communicating sensor assembly including a UCM 4 with integral temperature
and pressure sensor, and output to the bypass damper s)
Bypass damper with factory-installed wiring harness for plug-in connection to
the communicating sensor assembly
Zone dampers with UCM 4 boards and:
– Zone occupancy sensor input
– Zone carbon dioxide) CO2 sensor input
New rectangular zone dampers sizes given in inches):
– 8×12, 8×14, 8×16
– 10×16, 10×20
– 14×18
Same Comm4 communications to the zone dampers for reliable operation and
backward compatibility
Supports Comm5 communications to the new Tracker Version 10 panel
Optional touch-screen operator display with built in 7-day time clock
Windows®-based PC software program for system interface
Digital display zone temperature sensor
Pressure-independent box capability
Local heat capability
Chapter 3

VAV-SVP01A-EN6
Feature Summary
Functional Enhance ents
Increased Zone Count
The new VariTrac system now supports 24 zones instead of 16. The
zones may be VariTrac dampers, or any type of VariTrane VAV box
including fan-powered boxes or boxes with factory-installed local heat.
Discharge Air Control
VariTrac now does discharge air control. When there is demand for
heating or cooling from a zone, the CCP controls the discharge air
temperature to the discharge air setpoint default 55°F cooling, 110°F
heating), using as many stages as necessary.
Supply Air Te pering
It is now possible to enable the supply air tempering function in a
Voyager via the CCP. This allows the Voyager to cycle a stage of heat on
and off to warm up the supply air stream and better manage the load
created by increased ventilation air requirements.
CO2-Based De and-Controlled Ventilation
CO2 sensors can now be connected to VariTrac zone UCMs. The CCP
demand control ventilation will reset the ventilation damper position for
the Voyager/Precedent unit based on the CO2 level.
Zone Occupied Standby Function
A VariTrac UCM can now have an occupancy sensor connected to it. It
can be configured to perform an occupied standby function at the zone
level during the system occupied mode.
Syste Balance Mode
A VariTrac system can be placed in the balance mode from the operator
display or the PC software using a single button selection. In this mode,
the CCP automatically prepares the VariTrac system for balancing by
starting the supply fan, disabling heating and cooling, closing the bypass
damper, and opening all zone dampers to their maximum position.
Global Sensor Setpoint Li it Setup
The VariTrac CCP allows you to create a single set of limits for the zone
sensor setpoint thumbwheels and broadcasts them to all the zones on
the system at one time by pushing a single button.

VAV-SVU01A-EN 7
Software Change History
New software versions add capabilities and improve existing operation. Each new
software version includes the features of previous versions. Only the latest
software version is shipped in new VariTrac CCP units. Existing units may contain
a previous version.
The following information states the history of VariTrac CCP embedded software
version changes:
Version 4.0.284. Pre-release version of VariTrac 3) central control panel.
Version 4.0.290. First release of VariTrac 3) central control panel.
Version 4.1.296. Second release version of VariTrac 3) central control panel.
Corrected CCP to Voyager Commercial occupancy state sync issue when
power was cycled at the unit but not at the CCP
Corrected CCP to Voyager II slave state sync issue when power was cycled at
the unit but not at the CCP
Chapter 4

VAV-SVU01A-EN8
Software Change History

VAV-SVU01A-EN 9
General Infor ation
The VariTrac comfort control system brings individual temperature control
to each comfort zone in a building while using the same single-zone air-
conditioning unit. VariTrac varies the flow of supply air to each zone,
providing the heating and cooling capacity required. The VariTrac
changeover-bypass VAV system includes the following components:
• VariTrac central control panel CCP)
• Communicating sensor–bypass control assembly
• Main supply duct bypass damper s)
• VariTrac zone dampers with unit control module UCM) and zone
temperature sensor
Central Control Panel
The CCP provides coordination, monitoring, and diagnostics for the
VariTrac zone-control system. It is responsible for communicating with
the zone dampers to determine space heating and cooling requirements,
and selecting the mode and number of stages for the heating and cooling
unit to meet those needs.
The VariTrac CCP is designed to provide coordinated control of up to 24
VAV zones and one air-handling unit. The CCP can be controlled and
monitored from an upper level system such as a Tracker Version 10.
VariTrac can also function as a stand-alone device with its occupied/
unoccupied function initiated by the time clock built into the CCP
operator display, or by a binary input from an external time clock or other
contact closure.
Co unicating Sensor–Bypass
Control Asse bly
The communicating duct sensor assembly consists of a static-pressure
sensor, supply-air-temperature sensor, and communicating zone UCM
board combined into one enclosure. This device performs the following
functions:
• Measures the air pressure in the main supply duct
• Monitors the temperature of the air in the main supply duct
• Controls the position of the bypass damper
• Communicates all this information to the CCP
Chapter 5

VAV-SVU01A-EN10
General Information
Bypass Da per(s)
The main supply-duct bypass damper s) are modulated by the CCP via
the communicating sensor–bypass control assembly to maintain
consistent supply duct static pressure.
Zone Da per with UCM and
Zone Te perature Sensor
The zone damper UCM compares the space temperature to the active
setpoint to determine space requirements, and to the supply air
temperature to determine available heating or cooling. It modulates the
damper to provide the proper amount of heating or cooling air to meet
comfort conditions.
The zone UCM also provides the VariTrac CCP with information about the
current comfort conditions and heating or cooling requirements of the
space.