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INSTALLATION
SL 80-399 MODULATING GAS BOILER
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
All venting must be installed in accordance with the requirements of the jurisdiction having
authority: in Canada, Part 8, Venting Systems of the B149.1-10 Code and any other local
building codes are to be followed. In the USA, the National Fuel Gas Code, ANSI 223.1,
latest edition, prevails. Where there is a discrepancy between the installation instructions
below, and the code requirements, the more stringent shall apply.
Provisions for the combustion and air ventilation must be in accordance with the section
“Air for Combustion and Ventilation” of the National Fuel Gas Code, ANSI Z223.1/NFPA
54, or Clause 8.2, 8.3 or 8.4 of the Natural Gas and Propane Installation Code, CAN/CSA
B149.1, or applicable provisions of the local building codes.
IMPORTANT:
When an existing boiler is removed from a common venting system, the common venting
system is likely to be too large for proper venting of the appliances that remain connected
to it.
When resizing any portion of the common venting system, the common venting system
should be resized to approach the minimum size using the appropriate tables in the
National Fuel Gas Code, ANSI Z223.1 - latest edition. In Canada, use the B149.1
Installation Code.
At the time of removal of an existing boiler the following steps shall be followed with each
appliance remaining connected to the common venting system placed in operation, while
the other appliances remaining connected to the common venting system are not in
operation.
•
Seal any unused opening in the common venting system.
•
Visually inspect the venting system for proper size and horizontal pitch and determine
there is no blockage or restriction, leakage, corrosion and other deficiencies that
could cause an unsafe condition.
•
Insofar as is practical, close all building doors and windows and all doors between
the space in which the appliances remaining connected to the common venting
system are located and other spaces of the building. Turn on clothes dryers and
any appliance not connected to the common venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan. Close fireplace dampers.
WARNING
Venting, condensate drainage,
and combustion air systems for
all IBC boilers must be installed
in compliance with all applicable
codes and the instructions of
their respective Installation
Manuals.
Inspect finished vent and air
piping thoroughly to ensure all
are airtight and comply with the
instructions provided and with
all requirements of applicable
codes.
Failure to comply will result in
severe personal injury or death.
Figure 3: Flue gas venting
