IECEx (Zone 2 and 22 purging system
installation)
246
GasEye Cross Duct SG and MG
Operating instructions, 05/2021
Zone 2 and 22 purging system adjustment possibilities
5500-type purging systems are supplied by Airoptic with already configured software
and hardware settings. However, some parameters can be adjusted by the user,
those are:
- Inlet gas pressure
User must supply regulated pressure gas source into manifold inlet.
Pressure must not exceed 2 bar(g) and should not be less than 1.4 bar(g)
at this point.
- Average gas flow rate after purging
During purging procedure, 5500 controller opens solenoid valve in
manifold completely, increasing gas flow through the system. After
respective purging time there is no need to purge more so the solenoid
valve is being closed and gas at the manifold flows only through a needle
valve which level of opening can be adjusted by the user after purging
(special key is included in the kit).
This adjustment regulates average value of the gas flow. If the needle valve
is opened more, the flow is greater and compensation for system leakages
is better, although the consumption of the gas will be greater too – even
more than 10l/min. If the needle valve is closed completely, purging
controller will be opening the manifold more often to build up pressure at
the vent above P2 value and the gas flow will be pulsed, making
unnecessary gas turbulences in the system. It is good to set some constant
flow through manifold and thus make the pump-up action less frequent.
- Password to the 5500-controller parameters menu
Password to controller menu is ‘0000’ by default. It can be reset by
choosing ‘change password’ in the menu. After that controller will
immediately ask for a new password. Entrance to the controller menu is
achievable only by holding ‘set’ button for 5 seconds.
WARNING
Customer is not allowed to change any other purging system settings nor replace
any hardware element
