Trane Round In/Round Out Seznam dílů Strana 98
- Strana / 158
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
98 VAV-PRC011M-EN
DDC Controls
Connections
1/4" (6.35 mm) Stab Connections
Communications
RS-485; Stranded wire, twisted pair, shielded, copper conductor only, 18–20 awg
Fan Control
• Series fan: On unless unoccupied and min. flow has been released.
• 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).
Heat Staging
Staged electric or hot water proportional or pulse-width modulation
Trane DDCVAV Controller Logic - UCM 4
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 airflow setpoints, temperature and temperature setpoints, valve position, fan status (on
or off, and mode of operation: series or parallel), reheat status (on or off), box type and air valve
size, temperature correction offsets, flow correction values, ventilation fraction, etc. are available
on a simple twisted-shielded wire pair.
Trane DDC controllers provide Trane-designed, solid-state electronics intended specifically for VAV
temperature 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 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 airflow to cooling load. In heating control action, the DDC controller matches
the heating airflow to control 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
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™or Rover™ V4).
• Multiple reheat control options including staged electric, staged hot-water (normally on or
normally off), proportional hot-water, slow pulsed width modulation, electric, and SCR electric.
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.
• 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
2
sensor. When sensor is mounted in the supply air duct 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. Otherwise, the input will be used for
- 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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