AFA4000/E
VAV Airflow Controller / p.49
5.1.1
SM7 airflow sensor installation notes
It is very important to position the SM7 airflow sensor in the correct position to give a long-term
stable reading of the face velocity.
Figure 15: Airflow sensor installation diagram
Please read the notes below and if in doubt contact us for further advice.
1.
The SM7 sensor must be positioned where it can sense the room pressure of the laboratory.
The back-connection spigot of the sensor is designed to accept a tube with outside diameter
of 25 mm, which should be connected to the inner chamber of the fume cupboard. This tube
and fittings are known as the ‘vent kit’.
The ideal position for the end of the 25 mm diameter tube, for most fume cupboards, is 100
mm back from the sash glass and 100 mm higher than the normal sash opening height
through the inner side wall.
2.
If possible, mount the sensor on the front of the fume cupboard and use a short length of
tube. Tube lengths of more than 1 m or smaller diameter will restrict the airflow through the
Summary of Contents for AFA4000/E
Page 1: ...AFA4000 E VAV Airflow Controller Installation and operating manual Issue 2...
Page 57: ...AFA4000 E VAV Airflow Controller p 57 Figure 22 AFA4000 E inverter control connections...
Page 58: ...AFA4000 E VAV Airflow Controller p 58 Figure 23 AFA4000 E damper control connections...
Page 59: ...AFA4000 E VAV Airflow Controller p 59 Figure 24 AFA4000 E typical connection diagram...
Page 60: ...AFA4000 E VAV Airflow Controller p 60 Figure 25 AFA4000 E AS typical connection diagram...
Page 62: ...AFA4000 E VAV Airflow Controller p 62 Figure 27 SM7 airflow sensor dimensions...
Page 96: ...AFA4000 E VAV Airflow Controller p 96 6 9 Auto Sash System Control Box general wiring diagram...
Page 158: ...AFA4000 E VAV Airflow Controller p 158...
Page 182: ...AFA4000 E VAV Airflow Controller p 182 Figure 79 Connection diagram with RS232 485 converter...
