Kewaunee Air Alert 300, Инструкция по установке и эксплуатации, Страница: 15 / 26

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3.4 Quick Start Installation
Follow the instructions below for installing and commissioning the unit. :-
Before connecting the unit, it is important to decide on the type of calibration that is to be used on the installation.
The two methods are described in section 1.2 Alarm Configuration / Calibration above.
1. Fit the alarm to the Fume Hood using the cut-out details provided with the unit
--- see page 11
2. Plug in the power adapter to a Mains AC power socket and connect the flying lead to the alarm unit --- see
typical connection diagram on page 13 & 14
3 Power up the unit and wait at least 30 secs while the sensor temperature stabilizes.
During this time the Red & Green LEDs will both be on ( not flashing )
If the unit has not been previously calibrated the Red & Green LEDs will begin to flash
on/off at the end of the 30 sec start up time delay but the audible alarm will not sound.
If the alarm has been calibrated it will go into normal operation.
5. Calibration :-
Alarm Point Capture ( With jumper J2 connected )
a.
Set the exhaust Fan speed to the alarm point level.
b.
Press and hold the Enter button for 5 secs to go into the calibration mode. This is indicated by both Red
and Green LEDs flashing on/off together with the audible alarm sounding ( ‘Beep on/off 4 times every 1
sec ).
c.
To initiate the alarm point calibration press and hold the ENTER and the SET buttons at the same time.
The unit will then sample the airflow for a 5 sec period during which time the GREEN LED goes off and
the RED LED flashes on/off. The audible alarm continues to sound during this period and if the sampling
is successful will give a two tone beep at the end of the period and the unit will then go automatically into
the RUN mode.
If the buttons are released during the sampling period or if the airflow is fluctuating more than the pre-set
value the audible alarm will give a lower frequency buzzing sound for a short period and then go back
into the calibration mode. If this occurs re- press the ENTER and SET buttons to repeat the airflow
sampling.
d. When complete re-set the airflow to the normal value and the unit will go to the Safe
running condition with the GREEN LED on.
The unit will now function and go into the alarm condition if the Fume Hood air velocity falls below the alarm
value.