Fume hood with variable air volume flow control, vertical and horizontal sash and lighting

 

  • Fume hood exhaust air volume control and control for fast, precise VAV actuator on 0...10V output.
  • Consisting of functions for face velocity setpoint, exhaust air volume flow setpoint, sash positioning, and lab operator display panel. Integrated lighting control
  • Configure the exact functionality based on connected devices and application block.
  • Configurable, generic universal control functions for free I/Os

Plant diagram with integrated lighting control

DXR2…

Room automation station

YE

VAV exhaust air control with damper actuator YEM and pressure sensor YEP

SV

Vertical sash sensor

RU

Fume hood control unit

F

Flow sensor

L

Lighting

R

Room

 

Function diagrams / sequence diagrams

Exhaust air volume flow setpoint

V
EhAirFlMax
FhAflMinEffEh
EhAirFlMin
Sash pos
Air flow Sp
SshpSpAflMin
SshpSpAflMin
FhSpAirFlEh

Volume flow (Setpoint)
Exhaust air VAV maximum air volume flow
Fume hood exhaust effective minimum air volume flow
Exhaust air VAV minimum air volume flow
Front shutter position
Face velocity setpoint
Sash position for minimum exhaust air volume setpoint
Sash position for maximum exhaust air volume setpoint
Exhaust air volume flow setpoint

Function description

 

Basic functions

  • PID control for fume hood exhaust air VAV
  • Fume hood VAV exhaust flow rate dynamically set as per face velocity, fixed flow rates selected off-line or as per occupancy, flow rates selected automatically as per sensors connected to sashes, flow rates selected manually.
  • Supports different types of VAV damper actuators.
  • Supports dedicated sensors for detecting face velocity, sash position, fume hood extract air volume flow.
  • Regular automatic pressure sensor calibration (DXA.S04P…)
  • Supports dedicated KNX PL-Link operator display panel (ODP).
  • Pushbuttons, switches for integrated lighting
  • Different exhaust air control strategies including emergency functions (e.g. Emergency air volume flow)
  • The application function communicates with room control using the room/segment model.

Options

  • Extract air VAV sensor 0...10 V
  • Optional system alarms displayed on the management station notify building operators of possible faults
  • Optional trends can be enabled
  • Fume hood sash switch for fume hood setpoint (2-position volume air flow control )

Auxiliary functions

  • Green Leaf function (energy saving indication)
  • Multisegment use of DXR2 automation stations with pressurized room application
  • Control via central commands (e.g. scheduler program for fume hood)
  • Central override functions for VAV dampers
  • Configurable, generic universal control functions for free I/Os

Variants

  • KNX PL-Link sensor or binary sensor detects presence

 

Siemens devices

Description

Device type

Data sheet

Type

Qty.

DXR2…

Compact room automation station, BACnet/IP, 24 V,
DIN housing, 3 DI, 2 BI, 4 UI, 4 DO triacs, 4 AO 0…10 V

A6V10959860

DXR2.E17C-103°
DXR2.E17CX-103A

1

RU

KNX PL-Link room operator for fume hood, segmented backlit display, touchkeys or soft touch keypad (Slim)

A6V1095985
A6V10959882

QMX3.P87
QMX3.P88 (Slim)

1

YEM

VAV damper actuator, AC 24 V, DC 0...10 V, 6 Nm, 2 s

A6V11991165

GAP191.1E

1

YEP

Airflow differential pressure sensor, AC 24 V, SCOM, 0..250 Pa with or without installation box

A6V11174697

DXA.S04P1 or
DXA.S04P1-B

1

F

Flow sensor AC24V, DC 0...10 V, 0..1.3m/s

A6V10634812

QVE3001

1

SV

Vertical sash sensor, 0...10kOhm, 1300mm
Vertical sash sensor, 0...10kOhm, 2000mm

A6V11178717

DXA.B130

DXA.B200

1

L

KNX PL-Link lighting switch, RL512/23, RS510/23, UP510/03, UP510/23, RS525/23, UP525/13, JB512C23, JB510C23, JB525C23

1)

 

1

1) Additional documents available at www.siemens.com/gamma-td

 

Optional 1) 3)

Description

Device type

Data sheet

Type

Qty.

SH

Horizontal sash sensor

A6V11178717

DXA.B130
DXA.B200

1

DW

Door/window contact, white

2)

 

1

DP

KNX PL-Link Presence detector

2)

Third-party

1

YEP

Differential pressure sensor, AC 24 V, DC 0..10V, 0..300 PA

N1925

QBM3460-3

1

1) Can be combined as per available on-board I/Os on controller.
2) Additional documents available at www.siemens.com/gamma-td.
3) Horizontal sashes require a flow sensor (F), horizontal sash sensor (SH), or switch on a digital input.

 

Connection diagram

 

Application configuration

Group

Equipment

Values/range

Template settings

On-board output

Extract air VAV position

Y10; 0...10 V
Y1, Y2

Y10, 0..10V

On-board input

Extract air differential pressure

X1; 0..10V,
4..20mA; SCOM

SCOM

Fume hood sash position 1

B1; B2; 0..10kOhm

B1

Fume hood face velocity

X1; X2; X3; X4; 0..10V

X2

KNX PL-Link devices

Operator display panel

QMX3.P87, QMX3.P88

QMX3.P88

Lighting

RL512/23, RS510/23, UP510/03, UP510/23, RS525/23, UP525/13, JB512C23, JB510C23, JB525C23

RS510/23

Optional configuration

Group

Equipment

Values/range

Template settings

On-board output

Fume hood alarm contact

Y1; Y2; Y3; Y4; NC (normally closed)

 

Fume hood decommissioning contact

Y1; Y2; Y3; Y4; NC

 

Binary output 1...4

Y1; Y2; Y3; Y4; NC

 

Analog output 1...4

Y10; Y20; Y30; Y40; 0...10 V

 

On-board input

Exhaust air VAV air velocity

X1; 0...10V

 

Extract air temperature

X1; X2; X3; X4: LG-Ni1000, 0...10V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4...20mA

 

Fume hood sash position 2

B1; B2; 0...10kOhm

 

Fume hood fire detector

D1; D2; D3; X1; X2; X3; X4; NO (normally opened)

 

Fume hood presence detector 1...2

D1; D2; D3; X1; X2; X3; X4; NC (normally closed)

D1

Brightness

X1; X2; X3; X4; 0..10V

 

Fume hood remote emergency purge switch

D1; D2; D3; X1; X2; X3; X4; NO

 

Fume hood sash alert switch

D1; D2; D3; X1; X2; X3; X4; NO

 

Fume hood sash switch 1..2

D1; D2; D3; X1; X2; X3; X4; NO

 

Fume hood stabilizing jet fan state

D1; D2; D3; X1; X2; X3; X4; NC

 

Binary input 1...7

D1; D2; D3; X1; X2; X3; X4; NO

 

Analog input 1...7

X1 ; X2: X3 ; X4 ; LG-Ni1000, 0..10V; NTC100k, NTC 10k, T1 (PTC); Pt1000 (EU, NA); 4..20mA

 

 

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

Sample illustration of VAV application for fume hood in Desigo CC