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Marine Duty Wall & Remote Mount NFPA 496 Building Pressurization Units

Model WDP & RDP
Wall & Remote Mount NFPA 496
Building Pressurization Units

Standard Features

explosion-proof building pressurization units, hazardous location building pressurization units, classified area explosion proof building pressurization units

Unit Control Features

All Bebco Whisper Drive™ Wall and Remote Mount Building Pressurization Units feature a unique set of controls that ensure
absolute compliance with all NFPA 496 Code requirements; while operating in a manner you prefer to establish critical
parameters and preferred delays that ease entry and exit of your room or building and prevent unnecessary alarms.

These controls are located on the Variable Frequency Drive Interface (VFDI) Logic Control Board, and
are provided in the form of two set point adjustments and two delay timer adjustments. All adjustment
take affect in real time, as inputs to the on-board micro-processor, that is redundantly monitored by
a watchdog timer and pulsing led, to supervise performance and display real-time operating status.



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Unit Control Features
Field Adjustable Set Points & Delay Timers
Provides room pressure and alarm pressure settings, along with secondary fan and alarm activation timers

Room Pressure & Alarm Activation Set points


 
 




 
 
 
 
 
 
PFS:
 
 



ASP:
 
 
 
 
 
 
Primary Fan Speed Set Point Adjustment
sets primary fan speed to maintain safe room pressure.

Factory Set Point: 0.25"
Adjustment Range: 0.10" to 0.40"
 
Alarm Activation Set Point Adjustment
sets alarm to active upon loss of safe room pressure.

Factory Set Point: 0.15"
Adjustment Range: 0.05" to 0.25"
 
Secondary Fan & Alarm Activation Delay Timers


 
 
 
 
 
 

 
 
 
 
 
 
SFD:
 
 
 
 
 
 
ASD:
 
 
 
 
 
 
Secondary Fan Activation Delay Adjustment
sets time delay cycle to prohibit the secondary fan from engaging when room pressure falls below alarm set point.

Factory Set Point: 0 Seconds
Adjustment Range: 0-35 seconds
 
Alarm Signal Activation Delay Adjustment
sets time delay cycle to prohibit alarm signal output
when room pressure falls below alarm set point.


Factory Set Point: 15 Seconds
Adjustment Range: 0-35 seconds
Delay Timers reset automatically if Safe Pressure is
restored prior to expiration of the delay timer cycles.




Bebco Environmental Controls Corporation
Physical Address: 4725 Lawndale Street, La Marque, Texas 77568
Mailing Address: P.O. Box 68 Hitchcock, Texas 77563
Phone: (844) 397-4822     |   Fax: (409) 935-5819
Office Hours:
 8 AM to 5 PM CST, Monday - Friday
Please visit this site for NFPA 496 UL Classified Enclosure Purging Systems:
Best Purging Systems Corporation

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