Troubleshooting guide

11
SECTION V: VENTING
This is a Powered Direct Vent Gas Water Heater where all air for combustion is obtained from the outside atmosphere
and all flue gases are discharged to the outside atmosphere. The venting system is a coaxial (pipe within a pipe) design
where the flue products are discharged through the inside flue tube and the combustion air supply surrounds the flue tube
enclosed by the outside pipe. The venting system incorporates both the combustion air supply and the flue exhaust. The
venting system component, which is outside the building and takes in the combustion air supply and discharges the flue
products, (while keeping them separate) is referred to as the “direct vent terminal”.
Note: Provide protection of the building materials from degradation by flue gases from the direct vent terminal.
Figure 3
The venting system must be installed properly following all local codes or in the absence of local codes, the latest
edition of the National Fuel Gas Code (ANSI Z223.1- latest edition), or in Canada, The Natural Gas and Propane
Installation Code (B149.1-00 latest edition). Failure to properly install the venting system could result in property
damage, personal injury, or death.
Carefully inspect the venting system of a replacement water heater installation before connecting to the venting
system. All joints in the vent connector must be securely fastened with screws and fit tightly together. Inspect the
venting system for signs of deterioration (rust and perforation) and replace any sections that are not in good
condition.
The direct vent system must be properly installed. Failure to properly install the direct vent system could
result in property damage, personal injury, or death.
DO NOT install any damaged direct vent system components. If damage is evident then please contact the
supplier where the water heater was purchased or the manufacturer listed on the rating plate for
re
p
lacement
p
arts.
WARNING