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134 VAV-PRC011M-EN
Controls Specifications
For all VariTrane™ units, the unit controller continuously monitors the zone temperature and varies
the primary airflow as required to meet zone setpoints. Airflow is limited by adjustable minimum
and maximum setpoints.
Additionally, for series fan-powered units, the controller will start and run the fan continuously
during the occupied mode and intermittently during the unoccupied mode. Upon a further call for
heat, any hot water or electric heat associated with the unit is enabled.
For parallel fan-powered units, the controller energizes the fan upon a call for heat. Upon a further
call for heat, reheat is enabled.
Direct Digital Controls (DDC)
LONMARK Direct Digital Controller
Trane-designed L
ONMARK
®
certified controller uses the space comfort control (SCC) profile to
exchange information over a LonTalk™ Network. LonMark networks provide the latest open
protocol technology.
Direct Digital Controller
The microprocessor-based terminal unit controller provides accurate, pressure-independent
control through the use of a proportional integral control algorithm and direct digital control
technology. The UCM, monitors zone temperature setpoints, zone temperature, the rate of
temperature change, and valve airflow. With the addition of optional sensors, room occupancy or
supply duct air temperature can be monitored. The controller is provided in an enclosure with 7/
8” (22 mm) knockouts for remote control wiring. A Trane DDC zone sensor is required.
DDC Actuator
Trane 3-wire, 24-VAC, floating-point quarter turn control actuator with linkage release button.
Actuator has a constant drive rate independent of load, a rated torque of 35 in-lb, a 90-second drive
time, and is non-spring return. Travel is terminated by end stops at fully opened and closed
positions. An integral magnetic clutch eliminates motor stall.
DDC Actuator - Belimo
LMB24-3-T TN 3-wire, 24 VAC/DC, floating-point, quarter turn actuator with linkage release button.
Actuator has a constant drive rate independent of load, a rated torque of 45 in-lb, a 95 second drive
time, and is non-spring return. Travel is terminated by end stops at fully-opened and -closed
positions. Internal electronic control prevents motor stall when motor reaches end stops.
DDC Zone Sensor
The UCM controller measures zone temperature through a sensing element located in the zone
sensor. Other zone sensor options may include an externally-adjustable setpoint, communications
jack for use with a portable service tool, and an override button to change the individual controller
from unoccupied to occupied mode. The override button has a cancel feature that will return the
system to unoccupied. Wired zone sensors utilize a thermistor to vary the voltage output in
response to changes in the zone temperature. Wiring to the UCM controller must be 18 to 22 awg.
twisted pair wiring. The setpoint adjustment range is 50–88ºF (10–31°C) Depending upon the
features available in the model of sensor selected, the zone sensor may require from a 2-wire to
a 7-wire connection. Wireless zone sensors report the same zone information as wired zone
sensors, but do so using radio transmitter technology. No wiring from the zone sensor to the UCM
controller is necessary.
Digital Display Zone Sensor with Liquid Crystal Display (LCD)
The direct digital zone sensor contains a sensing element which sends a signal to the UCM. A Liquid
Crystal Display (LCD) indicates setpoint, or space temperature. Sensor buttons allow setpoint
adjust, and allow space temperature readings to be turned on or off. The digital display zone sensor
also includes a communication jack, for use with a portable edit device, and an override button to
change the UCM from unoccupied to occupied. The override button has a cancel feature, which
- 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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