Troubleshooting guide

Set-up
12
Combustion Air Supply
This boiler needs fresh air for safe
operation and must be installed so there
are provisions for adequate combustion
and ventilation air. Refer to
requirements of local juris dictions in
addition to the information in this
manual.
All combustion air must come from the
outside.
Provisions for combustion and
ventilation air must be made in
accordance with section 5.3, Air for
Combustion and Ventilation, of the
National Fuel Gas Code, ANSI Z223.1
(latest edition) or applicable provisions
of the local codes. In Canada follow
CAN/CSA-B149.1 or .2 Natural Gas
Installation Codes (latest edition) for
combustion and ventilation air
requirements.
Whenever possible, install boiler near an
outside wall so that it is easy to duct
fresh air directly to the boiler area. See
example in Fig. 2. Refer to national
codes for duct sizing. Round ducts can
be used.
The boiler location should never be
under negative pressure. Exhaust fans,
attic fans, or dryer fans may cause air
to be exhausted at a rate higher than air
can enter the structure for safe
combustion. Corrective action must be
taken to ensure enough air is available.
Nevercovertheboilerorstoredebrisor
other materials near the boiler, or in any
way block the flow of adequate f resh
combustion air to the boiler.
5167 450 v1.4
Outside
Venting
Combustion air ducted
from outside
Ventilation air
Fig. 2
Follow local regulations with respect
to CO detectors. Follow all s afety
information f rom LP or gas supplier.
CAUTION
Failure to provide an adequate supply
of fresh combustion air can cause
poisonous flue gases to enter living
space which can cause severe
personal injury or loss of life.
WARNING