Owner's Manual

C199 Manual 7
Common Vent & Commercial Hybrid System Applicaons Only
Room air can  be used in applicaons that ulize either the approved Rinnai common vent method, or the
commercial hybrid system (Refer to Rinnai Common Vent or Commercial Hybrid System installaon manual for
further details)
Combuson
Air Intake
Exhaust
(Concentric)
Concentric venng requires
air intake cap to remain
installed.
Combuson
Air Intake
Exhaust
(PVC/CPVC)
Two pipe venng requires air
intake cap to be removed to
accommodate air intake pipe.
Combuson Air Requirements
This water heater requires adequate combuson air for venlaon and diluon of ue gases. Failure to provide
adequate combuson air can result in unit failure, re, explosion, serious bodily injury or death. Use the follow-
ing methods to ensure adequate combuson air is available for correct and safe operaon of this water heater.
Important: Combuson air must be free of corrosive chemicals. Do not provide combuson air from
corrosive environments. Appliance failure due to corrosive air is not covered by warranty.
Combuson air must be free of acid forming chemical such as sulfur, uorine and chlorine. These chemicals have
been found to cause rapid damage and decay and can become toxic when used as combuson air in gas appli-
ances. Such chemicals can be found in, but not limited to bleach, ammonia, cat lier, aerosol sprays, cleaning
solvents, varnish, paint and air fresheners. Do not store these products or similar products in the vicinity of this
water heater.
Common Vent Room Air
Appliance Adapter