Advertisement
IMPORTANT
For gas-fired boilers for connection to gas
vents or chimneys, vent installations shall be in
accordance with Part 7, "Venting of Equipment," of
the National Fuel Gas Code, ANSI Z223.1/NFPA-
54, or Section 7, "Venting Systems and Air Supply
for Appliances," of the CAN/CSA B149.1, Natural
Gas and Propane Installation Code, and applicable
provisions of local building codes.
For oil-fired boilers for connections to vents or
chimneys, vent installations shall be in accordance
with applicable provisions of "Installation of Oil,
Burning Equipment" NFPA-31 – latest revision, and
applicable provisions of local building codes.
!
Boiler is to be vented by natural draft and
shall not be connected into any portion of a
mechanical draft system operating under a
positive pressure.
Inspect chimney to make certain it is
constructed according to the latest revision
of the NFPA211. Local codes may differ from
this code and should be checked. Where
there is a conflict, the local code will prevail.
In Canada refer to the National Building
Code or CSA-A405 as applicable.
When the boiler is removed from the common venting
system, test to see if the vent system is too large for
the remaining appliance. 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.
1. Seal any unused openings in the common venting
system.
!
WARNING
2. Visually inspect the venting system for proper
size and horizontal pitch and determine there is
no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe
condition.
3. 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.
4. Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
5. Test for spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use
the flame of a match or candle, or smoke from a
cigarette, cigar or pipe.
6. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above,
return doors, windows, exhaust fans, fireplace
dampers and any other gas-burning appliance to
their previous condition of use.
7. Any improper operation of the common venting
system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural
Gas and Propane Installation Code. When resizing
any portion of the common venting system, the
common venting system should be resized to
approach the minimum size as determined using
the appropriate tables in Part 11 of the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA
B149.1, Natural Gas and Propane Installation Code.
5
Advertisement
