Dwyer 670 - Manual (Page 9)

8
1.1 General Description
All systems comprise of the following components :
1 - 670 Alarm unit 1 - IOM
1 - AC power supply 1 - Vent kit
1 - 24˝ tubing 1 - Mounting bracket w/screws
Operator Features - the alarm has the following operator features :
Safe LED - Green LED (Not flashing) will be displayed if the airflow is greater than the Low
air alarm point.
Alarm LED - Red LED (Not flashing) will be displayed if the airflow is lower than the Low air
alarm point.
Sash High - Red LED (Flashing) will be displayed when the Sash is raised above the max
safe working opening.
Audible Alarm - The Audible alarm will sound ( can be muted ) in the Air Fail and the
Sash High alarm condition.
Night Set-back - When the Night Setback input is activated the Audible alarm will be muted and
the Green LED will flash on/off.
ENTER - The alarm has an Enter button - this is multi-functional as follows:
Pressing Enter momentarily when Low Air alarm is sounding will mute the alarm.
Pressing Enter momentarily when Sash High alarm is sounding will mute the alarm
and initiate a repeat timer that will re-sound the alarm if the Sash is not lowered to a safe
position before the end of the time period.
Pressing Enter for 5 secs will gain access to Calibration mode.
SET- Press SET for 10 seconds to permanently disable the audible alarm. The audible alarm
will beep 3 times to indicate a successful permanent audible disable. If audible alarm is
permanently disabled, press SET for 10 seconds to enable. The 3 beep audible signal will
notify a successful audible enable has been programmed. Also used during the airflow
Calibration of the alarm.
AV-670:B-32 10/1/09 2:20 PM Page 9