CAVA - MANUAL
11 | CAVA – Manual |
Fume Hood Valve Module (FVM) - Venturi FX Valve (VFX) and Terminal
Unit (TU) Applications
The Fume Hood Valve Module (FVM) works directly with Cava™
to accurately meet
the required exhaust airflow and fume hood face velocity. The FVM used in Venturi
FX Valve (VFX) and Terminal Unit (TU) applications uses high-accuracy pressure
readings to measure the airflow through the valve. The FVM delivers this real-time
airflow device information to Cava™
for display and communication over CANbus.
See the FVM product submittal on
Dimensions, and Wiring.
Mechanical Installation
Overview
The FVM is factory calibrated and mounted on the valve with which it was ordered. Only
electrical installation is required. Open the controls enclosure on the valve and follow the
wiring diagram in the project submittals for electrical installation.
Components
A
4 Analog Outputs (0 to 10 VDC, 10 mA Max. Each connected actuator requires 1 output)
B
Terminal Block to be connected to 24VAC power source (50/60 Hz, 17 VA Max)
C
High-pressure port
D
Low-pressure port
E
Indicator LED
F
CANbus terminal for connection to CAVA and other CANbus devices
G
Fume Hood Valve Module (FVM) pre-installed in fume hood valve enclosure
NOTE:
The FVM is factory mounted within the enclosure using #8 x 5/16 in. screws through
three mounting holes.
NOTE:
The maximum torque rating for any bushings on the enclosure is 4.43 in·lbs (0.5 N·m).
A
B
C
D
E
F
G