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9.3. Filter Maintenance
NOTE: Use Raypak replacement filters, for models 0856
- 1506 kit number 016860F; for models 1756 - 3006 kit
number 012552F.
•
Inspect quarterly.
•
Replace as needed. The recommended interval is
once per year.
10. APPENDIX
10.1. Inside Air Contamination
All heaters experience some condensation during start-
up. The condensate from flue gas is acidic. Combustion
air can be contaminated by certain vapors in the air which
raise the acidity of the condensate. Higher acidity levels
attack many materials including stainless steel, which is
commonly used in high efficiency systems. The heater
can be supplied with corrosion-resistant, non-metallic
intake air vent material. You may, however, choose to use
outside combustion air for one or more of these reasons:
1. Installation is in an area containing contaminants
listed below which will induce acidic condensation.
2. You want to reduce infiltration into your building
through openings around windows and doors.
3. You are using AL29-4C stainless steel, PVC,
CPVC or Polypropylene vent pipe, which is more
corrosion-resistant than standard metallic vent
pipe. In extremely contaminated areas, 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 cleaning
solvents found in household laundry rooms
•
adhesives used to fasten building products
•
similar products
Areas where contaminated combustion air commonly
exists:
•
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 skimmers
Check for areas and products listed above before in-
stalling heater. If found:
•
remove products permanently, OR
•
install TruSeal direct vent.
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