Option Purging Enclosure Or Enclosure Ventilation - M&C PMA Series Instruction Manual

16.2

OPTION PURGING ENCLOSURE OR ENCLOSURE VENTILATION

According to the Ex-Certificate (see annexe) purging of the enclosure is also required in case of increased
inlet pressure of 1.1 to max. 1.5 bar abs. To do this, choose the option Part No. 05A9005. For increased pressure
and corrosive gases, the analyzer must be equipped with the option enclosure purging (Part No. 05A9000).
When measuring corrosive gases, it is recommended to equip the analyzer also with the option enclosure
purging (Part No. 05A9000). This reduces the risk of the analyzer being destroyed by corrosion in the event
of leaking gas paths.
Purge gas inlet and outlet or vent, equipped with breathing and draining devices type MC95A with 1/4" NPT
female connections 3 (see Figure 1), are located on the top of the analyzer housing.
Dry air or nitrogen has to be used for purging the enclosure. The purge gas flow rate has to be adjusted
between 10 Nl/h and 60 Nl/h. The purge gas inlet pressure is max. 1.1 bar abs.
For retrofitting the analyzer with the option enclosure purging, the following components are necessary:
 2 x breathing and draining devices type MC95A, part number 90A5150
 1 x male connector DN 4/6-1/4""NPT female, part number 05V2060 for the purge gas connection.
Warning
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Use breathing and draining devices with LOCTITE™ Type 270 to prevent un-
intentional release of the devices!
PMA 50 EX | 1.01.04 21