Combustion Air Supply - Weil-McLain Gold GV Series 3 Supplement Manual

GOLD GV Series 3 & 4 — Z-Vent II Venting Supplement

Combustion air supply

Special note
Refer to GV Boiler Manual for sizing free area of combustion/ventilation air openings.
All boilers experience some condensation in section assembly during start-up. Unlike most conventional boilers,
condensation is minimized in the GV Boiler by a built-in mixing system, maintaining boiler return water
temperature above 130
Flue gas condensate is slightly acidic. In most cases pH level is not harmful to vents or drains. When combustion
air is contaminated by vapors from products and areas, listed in Table 1 below, condensate acidic levels increase.
Higher acidic levels attack many materials, including stainless steel commonly used in high efficiency systems.
You may choose to use outside combustion air for any of the following reasons:
• Installation is in an area containing contaminants listed in Table 1 below, which will induce acidic
contamination.
• You want to reduce infiltration into your home through openings around windows and doors.
Table 1
Products to avoid
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
Chlorine-type bleaches, detergents, and clean-
ing solvents found in household laundry rooms
Adhesives used to fasten building products and
other similar products
2
0
F, during steady state operation.
Corrosive contaminants
To prevent the potential of severe personal injury or death, check for areas and products listed
above before installing boiler. If found:
• remove products permanently — OR —
• provide outside combustion air
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
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
Garages with workshops
Part number 550-110-266/0601