Atest Gaz Alpa EcoWent XT, Руководство пользователя

Страница: 20 / 48

www.atestgaz.pl
In the detectors, set the configuration switch in position 1. In the last detector, set the
configuration switch in position 2 (see Figure 8). The control unit should show the state of
OPERATION for the whole bus.
Perform the test of the entire assembled bus. For this purpose, force the alarm on the last
detector by pressing the TEST button in the detector. After a period of time dependent on the
number of sensors (approx. 5-30 seconds), the control unit should signal ALARM.
With the pressed TEST button, measure the power supply voltage on the last detector. It should
not be less than 10 V. If it is lower, it is recommended to use a higher power supply voltage or use
a connection into a closed alarm loop.
For details, see Appendix [3].
9.2.2.3 Closed alarm loop
This system differed from the one mentioned above only in that:
in all the detectors being part of the loop, the configuration switches are set to position 1 (the
control unit works as the last detector) – see Figure 8,
the input of the last T-connector is plugged to the output of the control unit.
For details, see Appendix [3].
9.3 Start-up
9.3.1 Handover inspection
After performing the power supply and signal installation of the detectors, it is necessary to check and start
the installation. Checking is based on further addition of detectors (or their simulator – see below) to the
installation and checking the reaction of the control unit.
9.3.2 Checking
The verification of the correctness of operation of the installation is based on:
checking whether the control unit shows the status of OPERATION without the activation of the
sensors with gas,
activating the first detector with gas and checking the reaction of the control unit (it should display
WARNING or ALARM – depending on the concentration of the fed gas),
activation of the last detector with gas and checking the reaction of the control unit and all the
intermediate detectors (they should display or ALARM – depending on the concentration of the
fed gas),
random activation of selected intermediate detectors,
random disconnection of the detectors and checking the reaction of the control unit – it should
display the status of FAILURE.
9.3.3 Start-up of the system
After performing the electrical connection and handing it over to operation, the installation is ready to
work. After performing the electrical installation, it is possible to conduct start-up and verification of the
system in accordance with the procedure below:
p. 20|24
User Manual: POD-042-ENG R04