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GrenClOr Design Criteria AX20 and AM 00 Pods • Insulated foam-core lids with a minimum R-value of R-6(RSI-1)are standard equipment to prevent heat loss through the top of AX20 and AX100 pods.If necessary,insulation board or spray-on insulation foam can be added during installation. • The depth of the recirculation-blend tank can be increased—but the tank must still be accessible to operators for maintenance activities. • Warm air ventilation is critical.High flows of cold air through the treatment unit can cause significant temperature drops. • Orenco Fiberglass Shelters provide a climate-controlled environment—providing a temperature controlled air source for the treatment sys- tem,access to the control system,and equipment and storage for chemical feed equipment. AX-Max Units • Units are configurable for use in climates with extreme temperatures ranging from -60°F to 125°F(-51°C to 52°C). • Units are constructed with 4-inch(100-mm)foam cells that provide an estimated insulation value of R-26(RSI-5). • Orenco Fiberglass Shelters provide a climate-controlled environment—providing a temperature controlled air source for the treatment sys- tem,access to the control system,and equipment and storage for chemical feed equipment. General Cold Weather Considerations for All Systems • Standard cold weather practices for AdvanTex systems include allowing all lines to drain back to tankage and insulating access lids on primary and recirculation-blend tankage. • In extreme climates with long periods of subfreezing weather,a warm air source into the treatment pods or units or immersion heaters may be necessary to keep treatment temperatures above 50°F(10°Q. • In areas where snow typically accumulates each winter,air vents must be extended to ensure they are above peak snow levels. • In areas where frost heave is a concern,backfilling access riser excavations with pea gravel is recommended. Several times per year Orenco provides training on general wastewater concepts,design,and operation and maintenance at our facility in Suther- Iin, Oregon,as well as throughout the United States and abroad. If you are interested in attending a training session,contact Orenco or your local Orenco Dealer. Orenco staff is prepared to support the designer throughout the project cycle,from the initial evaluation of technologies,to the preliminary design, to a thorough and timely design review—all without cost.Orenco can also assist with the approval process and the evaluation of operational and life cycle costs. NDA-ATX-1 Orenco Systems®•800-348-9843•+1 541-459-4449•www.orenco.com Rev.8,©10/20 Page 20 of 38