Expo-Telektron Safety Systems MiniPurge Z & Y Purge Manual ...

Expo-Telektron MiniPurge Z purge Handbook ML 307 Issue A Page 4-1
4 Description and principle of operation
MiniPurge systems are classified according to the four major attributes as shown in this
example:
• The size or capacity of the system
00 1ZLC/ss/IS/WM (example part number see 4.2)
1 = Sub MiniPurge
2 = MiniPurge
3 = Super MiniPurge
• The certification of the system
00 1ZLC/ss/IS/WM (example part number see page 4-2)
Z = USA / Canada NFPA 496 cULus, E190061. FM, 1X8A4AE
Class I Div 2 Group A, B, C & D
Y = USA / Canada NFPA 496 cULus, E190061. FM, 1X8A4AE
Class I Div 1 Group A, B, C & D
• The method of pressurization
For more detail refer to section 4.3
00 1ZLC/ss/IS/WM (example part number see page 4-2 )
CF = Continuous Flow
LC = Leakage Compensation
• The type of alarm output and indication of the system
00 1ZLC/SS/IS/WM (example part number see page 4-2)
IS = Intrinsically Safe, Exi & EEx i circuit ‘Alarm’ and ‘Pressurized’: used with
others Ex i relay / barrier for alarm interface.
When located in a Division 2, an non-incendive circuit can replace the Ex I circuit or
when the alarm switch is fitted within the pressurized enclosure, 110 / 230V ac mains
supply can be used.
PO = Pneumatic Output
Signal ‘Alarm’: Loss of Pressure = No signal
”Pressurized” = 60 psi / 0.4MPa / 4 bar Signal
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