User manual

www.okinternational.com
12
6.0 Ambient Temperature Alarm Calibration
The BVX-200 filter-block alarm is factory calibrated to a specific temperature
setting and will, for most users, require no adjustment. However, users in
warmer climates may need to adjust the BVX-200 temperature setting to
prevent false alarms. Details are available from your local OK International
representative.
1 Assemble the BVX-200 as per the User Guide. Both the remote switch
the main power switch should be in the ‘Off’ position.
2 Switch On the main unit and press the remote switch. The remote switch
LED will light when powered. The unit will run and you will hear the
alarm sound momentarily but then stop while the motor continues to run.
Allow the motor to run for at least 10 minutes to attain normal operating
temperature.
3 With one inlet port already blocked, place a block plate with a 6mm Ø
hole over the other air inlet and listen for the alarm tone. If heard, go to
next step; if not, remove the plastic blanking-plug and turn the
potentiometer counterclockwise until the alarm tone is heard.
4 Replace the 6mm Ø hole blank with a 15mm Ø one. If the alarm still
sounds, gently adjust the potentiometer by turning screwdriver clockwise
until the alarm can no longer be heard. Refit the blanking plug once the
correct setting is obtained.
To make your own block-plates:
 A standard CD has a 15mm Ø hole at its centre.
 A paper hole-punch may be used on stiff card to make a hole that is
approximately 6mm.
End View
Adjustment
potentiometer