Weil-McLain GV90+ manual Prevent combustion air contamination

GV90+ gas-fired water boiler — User’s Information Manual

Prevent combustion air contamination —

Air contamination Combustion air contamination:

Common household and hobby products often contain fluorine or chlorine compounds. When these chemicals pass through the boiler, they can form strong acids in the vent system or boiler. The acid can eat through the vent or boiler wall, causing serious damage and presenting a possible threat of flue gas spillage into the building.

Please read the information below. If the contaminating chemicals will be present, have your installer pipe the boiler air from outside per the Boiler manual.

If the boiler is installed in any area likely to cause contamination, or if products which would contaminate the air cannot be removed, you must pipe combustion air to the boiler air in- take. Contaminated combustion air will damage the boiler and vent system, re- sulting in possible severe personal injury, death or substantial property damage.

Do not operate a GV90+ boiler in a laundry room or pool facility, for

example, without using ducted outside air. These areas will always contain con- taminants.

Ensure that the combustion air will not contain any of the contaminants in Figure 1.

Combustion air supply openings or intake terminations must NOT be near a swimming pool, for example.

Avoid areas subject to exhaust fumes from laundry facilities. These areas will always contain contaminants.

Figure 1 Corrosive contaminants and sources

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 cleaning solvents found in household laundry rooms

Adhesives used to fasten building products and other similar products

Excessive dust and dirt

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

4 Part number 550-142-055/0411