Application
Table Of Contents
- Overview
- Sequence of Operation
- Average Face Velocity Control
- AVS Calibration
- AO2 Flow Signal
- Control Loop - Damper Application
- Venturi Application
- Minimum Exhaust Mode
- Maximum Exhaust Mode
- Warning Limits
- Alarm Limits
- Alarm Output
- Horn Disable
- Sash Area Alarms
- Table Access Feature
- Emergency Mode
- Start-up/Decommission Mode
- Fail Mode
- Wiring Diagrams
- Point Database Application 6741
- Point Database Application 6742
Overview
Hardware Inputs
8
Siemens Industry, Inc. Application Note 140-1344
Restricted 2015-11-09
Hardware Inputs
Analog
Air velocity sensor(s) – (2nd sensor available for field use)
(Optional)
Differential pressure transmitter/Linear Flow input (Vortex Shedder)
(Optional)
External face area
Vertical sash sensor(s)
Digital
Operator Display Panel (ODP)
ATTN.UNATTN (through DI 2)
OCC.UNOCC (through DI 2)
(Optional)
OCC Face Velocity Setpoint (through ODP)
Remote Emergency Purge (through DI 6)
Hardware Outputs
Analog
Operator Display Panel (ODP)
AO2 (flow signal, 1 to 10 Vdc)
AO3 Analog Actuation
Digital
Autozero Solenoid in Offboard Air Module (DO8)
(Optional)
Alarm (DO 7)
(Optional)
OFF Mode (DO 6)
Exhaust damper (DO 1 and DO 2, Floating Control Actuation)
Sash Alert
Ordering Notes
570-00701 BACnet FHC-OAVS VAV Fume Hood Controller, Fast-acting
Actuation for Damper or Venturi Air Valve with Vertical Sash
Configurations – Application 6741 and 6742
Requires Offboard Air Module – order and ship separately
550-819B Offboard Air Module (OAM) – order and ship separately
575-820A Operator Display Panel
AQM2200 Power Module
546-04000
546-04001
Fume Hood Sash String Pot 50"
Fume Hood Sash String Pot 80"