Room pressurization through air flow tracking and temperature control, heating and cooling coil or ceiling heating/chilled ceiling or radiator
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- For pressurized rooms with VAV actuators and optional fume hoods
- Supply and exhaust air volume control for fast, precise VAV damper actuators on 0...10 V outputs
- Airflow coordination and tracking of supply air/exhaust air ratio for positive/negative air flow control
- Ventilation control to remove and dilute air contaminants for rooms with defined air change rates
- Temperature control by adapting volume air flow (air change rate), cooling coil, or ceiling heating/chilled ceiling or radiator
- Monitoring of VAV air volume flows and min. room air volume flow (Air Change Rate)
- Configurable control functions by means of unused inputs and outputs
Plant diagram
DXR2… | Room automation station |
Function diagrams / sequence diagrams
Heating and cooling valve, air volume flow | ||
V | Air volume flow (Setpoint) |
Minimum air volume flow | ||
VavSuAirFlMaxH | Maximum volume flow Heating |
Function description
Basic functions
| Options
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Auxiliary functions
| Variants
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Siemens devices
Description | Device type | Data sheet | Type | Qty. |
---|---|---|---|---|
DXR2… | Compact room automation station, BACnet/IP, 24 V, | A6V10959860 | DXR2.E17C-103°A | 1 |
RU | KNX PL-Link room operator unit with sensors for temperature, humidity, CO2, segmented backlit display, touchkeys | N1602 | QMX3.P34 | 1 |
YS, YE | VAV damper actuator, AC 24 V, DC 0...10 V, 6 Nm, 2 s | N4608 | GAP191.1E | 2 |
YSP, YEP | Airflow differential pressure sensor, AC 24 V, SCOM, 0..250 Pa with or without installation box | A6V101063803 | DXA.S04P1 or DXA.S04P1-B | 2 |
Optional 1)
Description | Device type | Data sheet | Type | Qty. |
---|---|---|---|---|
BP, BS, BE | Cable temperature sensor PVC 2 m, LG-Ni1000 | N1831 | QAP22 | 1 |
DW | Door/window contact, white | 2) | S 290/11 | 23) |
DP | KNX PL-Link presence detector with brightness sensor | 2) | UP 258D12 | 1 - 4 |
YC | 2-port, 3-port valve or 3-port valve with bypass, PN16 | N4847 | V...P47.. | 1 |
| Motorized 3-positioning actuator for V...P47..., AC 24 V | N4864 | SSP81... | 1 |
YH | 2-port, 3-port valve or 3-port valve with bypass, PN16 | N4847 | V...P47... | 1 |
| Motorized 3-positioning actuator for V...P47..., AC 24 V | N4864 | SSP81... | 1 |
YHC | 2-port, 3-port valve or 3-port valve with bypass, PN16 | N4847 | V...P47... | 1 |
| Motorized 3-positioning actuator for V...P47..., AC 24 V | N4864 | SSP81... | 1 |
YSP, | Differential pressure sensor, AC 24 V, DC 0...10 V, 0...300 PA | N1925 | QBM3460-3 | 2 |
1) Can be combined as per available on-board I/Os on controller.
2) Additional documents available at www.siemens.com/gamma-td.
3) Type of operation (NC or NO). Multiple devices of the same type can be connected.
Connection diagram
Application configuration
Group | Equipment | Values/range | Template settings |
---|---|---|---|
On-board output | Variable air volume | Y1, Y2; 3-position | Y10; 0...10 V |
Variable air volume Extract air | Y3, Y4; 3-position | Y20; 0...10 V | |
On-board input | Extract air differential pressure | X1; X3; 0…10V, 4...20mA; SCOM | P1; P3; SCOM |
Supply air differential pressure | X2; X4; 0…10 V, 4...20mA; SCOM | P2; P4; SCOM | |
KNX PL-Link devices | Room operator unit 1 | QMX3.P02, QMX3.P34, QMX3.P36, QMX3.P37, QMX3.P74 | QMX3.P34 |
Optional configuration
Group | Equipment | Values/range | Template settings |
---|---|---|---|
On-board output | Cooling coil valve | Water; Y1/Y2; Y3/Y4; 3-position | Water; Y1, Y2; 3-position |
Heating/cooling valve | 4-pipe, 6-way; Y10; Y20; Y30, Y40; 0..10 V |
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Heating coil valve | Water; Y1/Y2; Y3/Y4; 3-position |
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Enable electric heating coil | Y1; Y3 NC |
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Ceiling heating/chilled ceiling valve 1...2 | Cooling; Y1/Y2; Y3/Y4; 3-position |
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Radiator valve 1...2 | Water; Y1/Y2; Y3/Y4; 3-position |
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Enable output radiator electric 1..2 | 1) Y1; Y3; NC |
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Dehumidifier position | Y10; Y20; Y30; Y40; 0...10 V |
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Enable humidification | Y1; Y2; Y3; Y4; NC |
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Binary output 1..4 | Y1; Y2; Y3; Y4; NC |
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Analog output 1..2 | Y10; Y20; Y30; Y40; 0...10 V |
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On-board input | Room temperature | X1; X3; LG-Ni1000, 0...10V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4...20mA |
|
Supply air temperature | X2; X4; LG-Ni1000, 0...10 V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4...20mA | X3; LG-Ni1000 | |
Extract air temperature | X1; X2; X3; X4; LG-Ni1000, 0...10 V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4...20mA | X1; LG-Ni1000 | |
VAV differential pressure supply air | P1; P3; SCOM | P1; SCOM | |
Supply air VAV air velocity | X1; X3; 0...10 V |
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Supply air VAV air volume flow | X1; X3; 0...10 V |
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VAV differential pressure extract air | P2; P4; SCOM | P2; SCOM | |
Extract air VAV air velocity | X2; X4; 0...10 V |
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Supply air VAV air volume flow | X2; X4; 0...10 V |
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Room pressure | X1; X2; X3; X4; 0...10 V |
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Demand control ventilation setpoint input | X1; X2; X3; X4; 0...10 V |
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Room air quality | X1; X2; X3; X4; 0...10 V |
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Relative room air humidity for room | X1; X2; X3; X4; 0...10 V |
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Relative room air humidity for duct | X1; X2; X3; X4; 0...10 V |
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Primary air temperature for air after-treatment | X1; X2; X3; X4: LG-Ni1000, 0...10 V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4...20mA | X4; LG-Ni1000 | |
Brightness | X1; X2; X3; X4; 0...10 V |
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Door/window contact | D1; D2; D3; NO (normally open) | D1 | |
Presence detector 1..2 | D1; D2; D3; NC | D2 | |
Emergency off | D1; D2; D3; NO |
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Heating coil overtemperature detector | D1; D2; D3; NO |
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Radiator overtemperature detector | D1; D2; D3; NO |
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Condensation monitor for chilled ceiling | D1; D2; D3; NO |
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Condensation monitor VAV cooling coil | D1; D2; D3; NO |
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Humidity detector in duct | D1; D2; D3; NO |
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Flow sensor | D1; D2; D3; NO |
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Blinds collision detector 1..2 | D1; D2; D3; NO |
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Binary input 1..7 | D1; D2; D3; NO |
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Analog output | P1; P2; P3; P4; SCOM |
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Default values
Group | Parameter | Values/range | Template settings |
---|---|---|---|
Temperature setpoints | Cooling setpoint for Comfort | 0...50 °C | 24 °C |
Delta cooling setpoint for Pre-comfort | 0...10 K | 1 K | |
Cooling setpoint for Economy | 0...50 °C | 35 °C | |
Cooling setpoint for Protection | 0...50 °C | 40 °C | |
Heating setpoint for Comfort | 0...50 °C | 21 °C | |
Delta heating setpoint for Pre-comfort | 0...10 K | 1 K | |
Heating setpoint for Economy | 0...50 °C | 15 °C | |
Heating setpoint for Protection | 0...50 °C | 12 °C | |
CO2 air quality control | Setpoint room air quality for Comfort | 0...2000 ppm | 900 ppm |
Setpoint room air quality for Pre-comfort | 0...2000 ppm | 1100 ppm | |
Setpoint room air quality for Economy | 0...2000 ppm | 1500 ppm | |
Setpoint room air quality for Protection | 0...2000 ppm | 1500 ppm | |
Supply air VAV | Supply air VAV max. air volume flow | 0...10,000 m3/h | 100 m3/h |
Supply air VAV min. air volume flow | 0...10,000 m3/h | 50 m3/h | |
Supply air VAV max. air volume flow | 0...10,000 m3/h | 100 m3/h | |
Supply air VAV min. air volume flow | 0...10,000 m3/h | 50 m3/h | |
Supply air VAV max. air volume flow | 0...10,000 m3/h | 100 m3/h | |
Supply air VAV min. air volume flow | 0...10,000 m3/h | 0 m3/h | |
Room operator unit | Room unit, temperature display | None | Display room temperature |
Room unit, window state display | Yes, No | No | |
Room unit, air quality display | None Display room temperature | Display room air quality | |
Room unit, air quality display | Numeric (in ppm) | Textual | |
Room unit, display heating/ | Yes, No | Yes | |
Enable operation: | Yes, No | Yes | |
Room unit, room temp. | Absolute temperature setpoint Relative setpoint shift | Relative setpoint shift | |
Enable operation: Fan speed | Yes, No | Yes | |
Enable operation: Presence button | Yes, No | No | |
Enable operation: Temporary | Yes, No | No | |
Enable operation: Room operating mode | Yes, No | No | |
Enable operation: Green Leaf | Yes, No | Yes |
Engineering
- The ABT Site engineering tool is required to engineer DXR2 automation stations.
- See the Siemens Download Center at www.siemens.com/bt/download for the latest application configuration and workflow tutorials.
- Options combined as per available on-board - I/Os.
Management platform
Example of VAV applications in Desigo CC