9017 Series Z-Purge Faq's

 

Question: The enclosure is not maintaining enough pressure, the pressure meter on the front of the enclosure never reaches the safe area (the green portion of the dial), and/or the pressure good indicator will not light when the reset button is pressed.

 

Possible Problems/Solutions:

Doors Not Sealed
Check to ensure that all doors and panels are installed, closed, and sealed or latched.

 

Enclosure Not Properly Sealed (other manufacturer's enclosure)
Check the sealing on all openings, panels, and doors on the enclosure to ensure that they are capable of maintaining internal pressurization. Some manufacturer's enclosures are only designed for minimum protection from environmental ingress; these enclosures are typically not suitable for purging applications. Other enclosure may need some slight modifications to enable them to maintain the required pressure for hazardous area protection.

 

Pack Seals Not Poured
The conduit that brings your power and signals into the enclosure must be sealed with Pack Seal compound (this can be purchased independantly, or you can purchase a PacSeal kit from Daisy Data, model number 9026). Not only does this seal the conduit to prevent the escape of air pressure (the cause of this problem), but Pack Seal encapsulation is required by the NFPA specifications for this equipment in hazardous areas.

 

Exhaust Port Incorrectly Adjusted
The exhaust port on the purge control may be adjusted incorrectly (due to a change in conditions or accidental resetting of a previously adjusted system). The adjustment for the exhaust port is the screw in the center of the black anodized circular exhaust cover on the purge control panel. Gently turn this screw clockwise to increase the internal pressure (the effects of adjustments can take up to two minutes to be fully apparent). Note that this adjustment should not be forced - the screw will stop turning easily at the end of the control range, and attempting to exceed this range will damage the control mechanism.

 

 

Question: Is the power on inside the enclosure when the pressure in the enclosure is not within the safe range?

 

Answer: Yes, it is possible that the power is on. In a Division 2 system, the power is switched on or off by the operator of the system.

 

 

Question: Can the purge control purge more than one enclosure?

 

Answer: Yes. The cabinets must be connected together with some air passageway that ensures that they both maintain the same internal pressure at all times, and so that purge air can flow freely between them. The end of the inlet flow tube must also be located at the farthest point away from the purge exhaust port (in the enclosure that is most remote from the purge exhaust).