4. OPERATION AND MAINTENANCE
©2014 Kraus Global Ltd.
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Retail CNG Dispenser Manual
4.4.4 Air purge system
Kraus’ Retail CNG dispensers incorporate an air purge system to
ensure the open electronics in the upper cabinet are protected from
potential gas leaks that may cause explosion. The air purge system
uses a purge fan to maintain a positive air pressure of at least 0.15
inches-of-water in the upper cabinet; otherwise the dispenser
system is automatically shutdown. A Magnehelic gauge, located in
the lower cabinet is used to monitor this pressure.
Purge fan filter maintenance guidelines
Inspect and clean the purge fan filter
once-a-month.
To clean, rinse the filter with soap and
water.
Dry thoroughly before reinstalling filter.
