Applications and Filter Sections

The exhausted air from the cooking operation passes through the Quiet-Aire ventilator and is ducted to the Ecology APU for the removal of the remaining grease particulate and smoke. The Ecology APU uses a three-stage filter system that is designed to progressively remove the exhaust grease and smoke particulate matter to an ASHRAE standard rated at 99+% clean air.

The filter section also includes:

• Pre-Filter, a disposable pleated media designed for 40% efficiency.
  
  
• Bag Filter, a disposable high efficiency, pleated bag filter with a 95% efficiency ASHRAE Std. 52-76-92 efficiency.
  
  
• Box Filter, a disposable 12” deep filter media with an efficiency of 99.8% (ASHRAE Std. 52-76, 95% D.O.P. test method to 0.3 Microns.
  
  
• A UL/ULC Listed fire damper is located downstream of the filter section with a fusible link to close the spring loaded damper.
  
  
• A pressure switch assembly is located on the filter section to monitor the status of each filter, and send service information to the remote mounted monitoring panel.
  
  
• A Fire Stat located in the filter section monitors the temperature within the unit and sends an alarm signal to the monitoring panel should the inside temperature rise above normal.
  
  

The Status Panel is constructed of stainless steel and is designed for remote mounting. The panel ACD model is used with the Quiet-Aire dry extractor type exhaust hoods and the model ACW panel is used with the Quiet-Aire model W1 wash type exhaust hoods.

The Status Panel features a 120/24v AC control circuit and contains the Fan ON/Off switch, lamps to indicate Power On, Replace Pre-Filter, Replace Bag Filter, Replace Box Filter, Filter Out, Fire, Alarm Reset pushbutton and Alarm Buzzer. Among the options available are Low Odor Liquid lamp, Hand-Off-Auto Switch and connections for controlling the unit and sending filter status signals to the Building Management System (BMS).

When equipped with the optional odor control section, the Ecology APU can effectively control objectional odors produced from commercial cooking. The exhaust airstream from the filter section is purified of grease and smoke but will still contain malodors produced from the cooking process. Control of these odors is accomplished by passing the exhaust airstream from the filter section through one of the odor control options offered by Quiet-Aire.

QA-ENVIRONSAFE
Is a liquid specially-formulated to remove malodors safely and effectively? The QA-EnvironSafe liquid is atomized directly into the exhaust airstream of the odor cabinet. QA-EnvironSafe is a formulation of natural ingredients from essential oils; it is nontoxic, biodegradable, water soluble and environmentally safe. QA-EnvironSafe is not an enzyme or chemical mask, it works by modifying the odor molecule to form a neutral substance. The combined molecular weight of the malodor and QA-EnvironSafe causes the molecules to fall to a lower atmospheric level and biodegrade naturally. A fresh natural scent results.

ACTIVATED ALUMINA SPHERES IMPREGNATED WITH POTASSIUM PERMANGANATE
Is an oxidizing media arranged in steel trays inside the odor control section. As the exhaust airstream passes through the trays, the media causes a chemical reaction, oxidation, that breaks the odor causing molecules into odorless natural substances.

ACTIVATED CARBON
Is an absorption/adsorption media arranged in steel trays inside the odor control section. As the exhaust airstream passes through the trays, the media works through a process of absorption and adsorption on the odor causing molecules. Also available is a 50/50 blend in equal amounts of activated carbon and alumina spheres impregnated with potassium permanganate.