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88 VAV-PRC011M-EN
DDC Controls
Trane LonMark™ DDC VAV Controller (VV550)
This LonMark™ certified controller uses the Space Comfort Controller (SCC) profile to exchange
information over a LonTalk™ network. Networks with LonMark certified controllers provide the
latest open protocol technology. Being LonMark certified guarantees that owners and end-users
have the capability of adding Trane products to other “open” systems and relieves owners of the
pressure and expense of being locked into a single DDC supplier. The Trane VV550 VAV controller
with VariTrane VAV units can be applied to more than just Trane systems. When a customer buys
a Trane VAV unit with Trane DDC controller, they take advantage of:
• Factory-commissioned quality
• Knowing they have selected the most reliable VAV controllers in the industry
• Trane as a single source to solve any VAV equipment, or system-related issues
• The most educated and thorough factory service technicians in the controls industry
• Over 150 local parts centers throughout North America that can provide what you need, when
you need it.
Don’t let your existing controls supplier lock you out of the most recognized name in VAV system
control in the industry. Specify Trane open-protocol systems.
The features of this controller are explained below.
General Features and Benefits
Assured Accuracy
• 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 that automatically adjusts valve position to maintain
required 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.
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 VAV, controller, and thus, overall unit.
• When in PI-mode, EH is disabled when the sensed flow is below the minimum required.
- Product Catalog 1
- Introduction 2
- Table of Contents 3
- UC210 BACnet Controller 8
- UC400 BACnet Controller 8
- Air-Fi Wireless System 9
- Wireless Zone Sensor Set 9
- Pneumatic Controller 10
- Binary Input Controller 10
- Features and Benefits 11
- Agency Certifications 12
- Model Number Descriptions 14
- Selection Procedure 17
- General Data 19
- 20 VAV-PRC011M-EN 20
- Performance Data 21
- 22 VAV-PRC011M-EN 22
- VAV-PRC011M-EN 23 23
- 24 VAV-PRC011M-EN 24
- VAV-PRC011M-EN 25 25
- 26 VAV-PRC011M-EN 26
- VAV-PRC011M-EN 27 27
- 28 VAV-PRC011M-EN 28
- VAV-PRC011M-EN 29 29
- 30 VAV-PRC011M-EN 30
- VAV-PRC011M-EN 31 31
- 32 VAV-PRC011M-EN 32
- VAV-PRC011M-EN 33 33
- 34 VAV-PRC011M-EN 34
- VAV-PRC011M-EN 35 35
- 36 VAV-PRC011M-EN 36
- VAV-PRC011M-EN 37 37
- 38 VAV-PRC011M-EN 38
- Electrical Data 39
- 40 VAV-PRC011M-EN 40
- VAV-PRC011M-EN 41 41
- 42 VAV-PRC011M-EN 42
- VAV-PRC011M-EN 43 43
- 44 VAV-PRC011M-EN 44
- VAV-PRC011M-EN 45 45
- 46 VAV-PRC011M-EN 46
- VAV-PRC011M-EN 47 47
- 48 VAV-PRC011M-EN 48
- VAV-PRC011M-EN 49 49
- 50 VAV-PRC011M-EN 50
- Dimensional Data 51
- 52 VAV-PRC011M-EN 52
- VAV-PRC011M-EN 53 53
- 54 VAV-PRC011M-EN 54
- VAV-PRC011M-EN 55 55
- LEFT HAND RIGHT HAND 56
- VAV-PRC011M-EN 59 59
- Mechanical Specifications 60
- Outlet Conection 61
- Hot Water Coils 61
- Electric Heat Coils 61
- Electric Heat Options 61
- Direct Digitals Controls 62
- Control Options 63
- Hot Water Valves 63
- 64 VAV-PRC011M-EN 64
- Dual-Duct VAV Terminal Units 66
- Octave Band 234567NC 67
- Outlet Connection 77
- Direct Digital Controls 77
- Reliable Operation 80
- Safe Operation 80
- System-Level Optimization 80
- Simplified Installation 80
- Controller Flexibility 81
- Control Logic 81
- Space Temperature Control 82
- General Operation-Cooling 82
- Ventilation Control 84
- Flow Tracking Control 85
- General Features and Benefits 88
- ONMARK open protocol 94
- DDC Controls 100
- Air-Fi™ Wireless System 101
- Dimensions 102
- Specifications 102
- DDC Zone Sensor 104
- Wall Sensor and Duct CO 105
- DDC Zone Sensor with LCD 106
- Zone Occupancy Sensor 107
- Two-Position Water Valve 109
- Proportional Water Valve 110
- VAV Piping Package 111
- Transformers 113
- Trane Spring Return Actuator 115
- VariTrane™ DDC Retrofit Kit 116
- Retrofit Kit Actuator 116
- Static Pressure Controller 117
- Pneumatic Controls 121
- Pneumatic Damper Actuator 123
- Reversing Relay 123
- Signal Limiter 125
- VAV-PRC011M-EN 133 133
- Controls Specifications 134
- DDC Retrofit Kit (VRTO) 136
- Retrofit Kit Options 136
- Other Options Available 137
- Application Considerations 138
- Terminal Heat 139
- Dual-Duct Systems 139
- VariTrane VAV Terminal Units 140
- VAV Terminal Unit Types 140
- Fan-Pressure Optimization 141
- Ventilation Reset 141
- Control Types 142
- Pneumatic Control Systems 143
- Room Thermostats 144
- Pneumatic Volume Regulators 144
- Flow Measurement and Control 146
- Accuracy 147
- Air Density Effects 147
- Reheat Options 148
- Electric Reheat 149
- Insulation 150
- Acoustics 150
- Insulation types 151
- Placement of units 151
- Unit Attenuation 151
- Certification and Testing 152
- Duct Design 153
- Best Practices 154
- Unit Conversions 155
- VariTrac™ catalog 157
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