P a g e
| 18
Rev. 2.1 7-7-2017
Copyright © 2017 by Cool Air Incorporated. All rights reserved.
PROGRAMMING AND OPERATION
The LBW-420-LEL detector is easy to program and operate.
Follow the instructions in this section to:
Program the ammonia alarm set point
Set the 4 to 20mA range
Set the Service mode time out
Programming the Ammonia Alarm Set Point
The Alarm set point can be set from .1% to 9.9% in .1% increments.
1.
Open the detector enclosure and move the service jumper to the
“ON” position.
2.
Set the rotary selector switch to position “3”.
3.
Press the “UP” or “DOWN” button until the desired set point
concentration in % is displayed.
4.
Press and hold the “ENTER” button for at least 2 seconds. The
new set point is now programmed.
5.
Return the rotary selector switch to the desired position.
6.
Be sure the ammonia concentration reading is below the
alarm set point
, then move the service jumper to the “OFF”
position and close the detector enclosure.
Resetting the Relays (for use only when the ammonia
concentration is below the alarm set point)
If the detector has gone into an alarm condition (at or above the
Ammonia Alarm Set point) the relays will activate and stay
activated until this manual reset procedure is completed.
1.
Install the jumper on the jumper pins (labeled “SET1”) located
below the rotary selector switch on the front panel-mounted
circuit board.
2.
Set the rotary selector switch to position “5”. The display will
indicate the current ammonia concentration in percentage.
3.
Press the “ENTER” button for two seconds. The relays should
reset to their normal operating condition.
