Direct and Indirect-Fired Solutions

New Berlin WWTP - New Berlin, PA

Explosion Proof Heating System

AA-Series 100% Outside Air, Variable Volume System
Explosion Proof Options

Key Facts:
Product: AbsolutAire AA-Series 100% Outside Air, Variable Volume System
Model: VAA1-UVX
Airflow: 4,600 (High)/3,250 (Low) CFM
Capacity: 273 MBH
Fuel: Propane

Spark Resistant Fan
Explosion Proof Controls
Filter Section with DustLOK Filters
Service Platform
Low Leak, Spring Return Motorized Discharge Damper
Variable Frequency Drive (VFD)
Powered GFI Service Outlet
36" High Support Legs

Installed: 2010

Project Overview:

The newly constructed New Berlin WWTP utilites and equipment area was in need of make-up air to replace exhausted building air in the space and also to prevent freezing of the pipes. They chose an AbsolutAire AA1-UVX for this application. Construction features of this equipment included a spark resistant fan, low leak, spring return discharge damper, and explosion proof controls that were mounted in the space. A VFD was also included to vary the airflow speeds during various seasons. During the winter months, the fan runs on high speed to properly heat the space. A room override stat allows for an even higher increase in the discharge air temperature when personnel are working in the building. During the warmer summer months, the VFD drops down to low speed, as not as much heat is needed in the space. An override switch running on a three hour timer was included, however, so that the fan could also run at high speed, if needed, in the summer.

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