Data Sheet for Product

ManualsBrandsSiemens ManualsBuilding automationSingle Fan VAV AHU DX Cooling with Options Application Data Sheet

Predator VAV with CO2

Application Data Sheet

Predator VAV with CO2 Controller Configuration

Features

• Demand Ventilation Control that adapts to meet IAQ specification requirements

• Economizer control of outside air damper that provides energy savings

• LonMark compliant with space-comfort controller functional profile (8502)

• PID control minimizes offset and maintains tighter set point control to increase space comfort

• Standby mode enables energy savings during occupied hours for rooms that are not always

used. When occupants are sensed, the controller quickly responds to maintain comfort levels.

• Diversity control, through a demand limit input, maximizes comfort by maintaining even air

distribution to all zones during morning warm-up or pre-cool operation.

• Conforms to the LonMark interoperability guidelines, enabling information sharing with LonMark

products from other vendors.

Sequence of Operation

In this core configuration, the Predator operates perimeter heat, the reheat coil and the primary air

damper to maintain required room temperature and ventilation conditions.

Occupied Mode

The Predator applies occupied settings for the space temperature setpoints and the primary air flow

minimum. The typical result is continuous ventilation, with heating or cooling automatically selected

to maintain comfort.

Cooling

The cooling PID maintains the measured space temperature at the occupied cooling setpoint by

modulating the primary air flow setpoint between the maximum cooling flow and the minimum

cooling flow.

Document No. 588-209 Revision CA December 2008

Summary of content (13 pages)

PAGE 1
Predator VAV with CO2 Application Data Sheet Predator VAV with CO2 Controller Configuration Features • Demand Ventilation Control that adapts to meet IAQ specification requirements • Economizer control of outside air damper that provides energy savings • LonMark compliant with space-comfort controller functional profile (8502) • PID control minimizes offset and maintains tighter set point control to increase space comfort • Standby mode enables energy savings during occupied hours for rooms that
PAGE 2
The ventilation PID calculates ventilation demand in occupied mode by measuring the space CO2 and comparing it to the configured CO2 setpoint. The ventilation demand is used by the flow component to generate a primary air flow setpoint between 0 and the configured maximum cooling flow. If both the cooling and ventilation PIDs are generating demand values, then the component with the larger setpoint value will drive the primary air flow PID.
PAGE 3
Bypass Mode During unoccupied periods, an occupant can put the Predator in the bypass mode by pressing the bypass button on the room temperature sensor. This causes the controller to operate exactly as in the occupied mode, for an adjustable amount of time. Standby Mode Standby mode applies separately adjustable temperature and ventilation setpoints. These may be adjusted to conserve energy, but allow quicker recovery compared to the unoccupied mode. Otherwise, operation is the same as the unoccupied mode.
PAGE 4
Occupancy Control Occupancy Mode The Predator controller defaults to the occupied mode of operation. Upon receipt of the 4state LonMark occupancy override (nviOccManCmd), the controller will switch to the appropriate mode of operation. A brief summary of each mode follows below: LonMark Occupancy State Mode Description (0) Occupied (1) Unoccupied Controller in Unoccupied mode and uses Unoccupied setpoints.
PAGE 5
Optional Functions Room Temperature Sensor Sharing The Predator Room Temperature Sensor may share its value with other controllers on the LonTalk network via a network binding. This is most commonly done when multiple terminal units serve a room or area. Occupancy Sensor/Wall Switch An optional maintained contact wall switch may be used to control the occupancy mode of a room. Rooms with variable occupancy (conference rooms, etc.) can use this device to control occupancy and the lights with one switch.
PAGE 6
Hardware Map – VAV with CO2 Sample Hardware Map for the VAV with CO2 Application Configuration Configuration Element Property inStat Inputs statTempOffset statSetptOffset - statTemp statSetpt statOvrd IN1 IN2 IN3 TEMP TEMP DI DI, TEMP DI, TEMP DI, PCT, TEMP DI, PCT, TEMP DI, PCT, TEMP PCT AO AO DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR DO, FLT_MTR IN4 IN5 outputs IN6 OUTA1 OUTA2 OUTD1 OUTD2 OUTD3 OUTD4 OUTD5 OUTD6 OUTD7 OUTD8 Page 6 of 13 Input/Output Fac
PAGE 7
Sample Wiring Diagram for VAV with CO2 Application Configuration Note: Route wiring from either the bottom opening when using a J-box or from the base sides as shown in the picture when flat or din rail mounting. The image above is for illustrative purposes only Wiring Recommendations: IN and AO: 20 to 22 AWG DO: 18 to 22 AWG Power: 16 to 18 AWG LON Network: 22 AWG Level 4 Transformer Requirements: Type: Class 2, 24 VAC, 50/60Hz Predator Wiring Diagrams (Full Point Board Shown) Document No.
PAGE 8
Ideal Material Solution Tag A B C D E F Description Product # Predator VAV with CO2 5IN, 8DO, 2AO, 1 DPS, 1RTS 588-518 Predator Full Point Wiring Base 587-175 Predator VAV Actuator 2301* 588-524 Predator Room Sensors: Sensing Only 587-180 Override 587-181 Setpoint 587-182 Temperature Display** 587-183 Setpoint and Override 587-184 Override and Temperature Display** 587-185 Setpoint and Temperature Display** 587-186 Setpoint and Temperature Display** 587-187 With terminal blocks and warmer/cooler setpoi
PAGE 9
Configuration Table The following table lists all of the configuration properties (CPs) available with this application. For more information on how to set these properties, please consult the Predator VAV with CO2 Application Guide.
PAGE 10
Configuration Property Element Language-dependent Name Programmatic Name PercentOff Factory Value 0.00% hCoilUnocc Unocc Operation for Htg Coil Cycle hCoilWrmup Warmup Operation for Htg Coil Cycle hStageCyc Staged Heat Cycle Time 10 minutes htgClgSwit Heating Cooling Switchover Logic DmdDeadband TmpDeadband TimeDelay htgDmdCtrB PID Controller Gain of the Heating Controller htgDmdFanRq Heating Demand Fan Request Pb 1.0% 0.9°F (0.5°C) 3 minutes 10.0°F (5.56°C) Ti 1000.0 seconds Td 0.
PAGE 11
Configuration Property Element Language-dependent Name Programmatic Name Factory Value DmdAtMin 0.00% DmdAtMax 100.00% TravelTime 125 seconds Reverse False SyncDirection close perimHtgMotr Perimeter Htg Coil Motor sensConstVAV Trm Flow Gain 1 seriesStDelay Series Fan Start Delay 0.0 seconds sourceTempLim Heating Cooling Limits NeededToCool 18.0°C (64.4°F) NeededToHeat 25.0°C (77.
PAGE 12
Configuration Property Element Language-dependent Name Programmatic Name Factory Value trmHtgMotr Terminal Heating Coil Motor TravelTime 125.0 seconds Reverse False SyncDirection Close Pb 0.00 Ti 0 seconds Td 0 seconds ventDmdCtrB Ventilation Demand Cntr Band ventTempDB Ventilation Disable Temp DBand 1.11°C * Available on some models of the Predator Room Temperature Sensor.
PAGE 13
Control Mode Interaction Table – VAV/CV Notice: Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as design improvements are introduced. Credits: Raptor, Predator, and TALON are trademarks of Siemens Building Technologies, Inc. Niagara Framework is a registered trademark of Tridium, Inc. Other products and company names herein may be the trademarks of their respective owners. Siemens Building Technologies, Inc.