AFA4000/E
VAV Airflow Controller / p.115
Figure 64: Red Power On LED
6.
Ensure that Switch 1 (
sw1
),
see Figure 54
, is set to the correct range:
Fume Hood Size
Sash Beam Range
sw1 Setting
0 to 10’ (up to 3000mm)
Short
Off
10’ to 16’ (3000 to
5000mm)
Long
On
7.
Ensure that Switch 2
(sw2)
(Figure 63) is set to
Off
(Operation Mode)
.
8.
Ensure that Switch 3 (
sw3
) is set to
On
(Normal Operation)
.
9.
Set Switch 4
(sw4)
to
On
. A buzzer will then sound when the beam is broken, this aids the
setting up of the beam.
The signal LED indicates beam status:
•
Green if the detection area is clear.
•
Red if the area is not clear.
10.
Turn the gain potentiometer anti-clockwise, to the minimum. The transmitter and receiver
can no longer sense each other.
11.
Slowly adjust the gain potentiometer (Figure 63) clockwise (to maximum) until the
transmitter and receiver can sense each other, for example, the receiver can detect the
beam sent from the transmitter.
12.
Set
sw3
to
Off
to store the settings.
13.
Turn the gain potentiometer approximately 5 degrees clockwise to ensure sufficient gain.
14.
Use a glass object to test whether it breaks the beam. Do this across the entire open face of
the fume hood.
If the glass object does not break the beam, adjust the gain potentiometer counter-clockwise
until inserting the glass object breaks the beam.
15.
If required, set
sw4
to
Off
to disable the buzzer.
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...
