Raypak HI DELTA 302B Installation & Operating Instructions Manual

Also see for HI DELTA 302B: Brochure & specs Specification sheet Replacement parts Specifications

Raypak HI DELTA 302B Installation & Operating Instructions Manual Manual pdf 54 page image

54APPENDIXInside Air ContaminationAll heaters experience some condensation duringstart-up. The condensate from flue gas is acidic.Combustion air can be contaminated by certain vaporsin the air which raise the acidity of the condensate.Higher acidity levels attack many materials includingstainless steel, which is commonly used in high effi-ciency systems. The heater can be supplied withcorrosion-resistant, non-metallic intake air vent materi-al. You may, however, choose to use outsidecombustion air for one or more of these reasons:1. Installation is in an area containing contaminantslisted below which will induce acidic condensation.2. You want to reduce infiltration into your buildingthrough openings around windows and doors.3. You are using AL29-4C stainless steel vent pipe,which is more corrosion-resistant than standardmetallic vent pipe. In extremely contaminated ar-eas, this may also experience deterioration.Products causing contaminated combustion air:• spray cans containing chloro/fluorocarbons• permanent wave solutions• chlorinated waxes/cleaners• chlorine-based swimming pool chemicals• calcium chloride used for thawing• sodium chloride used for water softening• refrigerant leaks• paint or varnish removers• hydrochloric acid/muriatic acid• cements and glues• antistatic fabric softeners used in clothes dryers• chloride-type bleaches, detergents, and cleaningsolvents found in household laundry rooms• adhesives used to fasten building products• similar productsAreas where contaminated combustion air commonlyexists:• dry cleaning/laundry areas• metal fabrication plants• beauty shops• refrigeration repair shops• photo processing plants• auto body shops• plastic manufacturing plants• furniture refinishing areas and establishments• new building construction• remodeling areas• open pit skimmersCheck for areas and products listed above before in-stalling heater. If found:• remove products permanently, OR• install TruSeal direct vent