
3.5.1.1 Important considerations when removing an existing boiler
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, use the minimum size according to
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. Determine
that there is no blockage or restriction, leakage, corrosion and other deficiencies that
could cause an unsafe condition.
(Where practical) Close all building doors and windows such as doors adjacent to
appliances remaining connected to the common venting system 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.
Place in operation the appliance being inspected.
Follow the lighting instructions.
Adjust the thermostat so that the appliance operates continuously.
After determining 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.
Any improper operation of the common venting system should be corrected, so the
installation conforms with the National Fuel Gas Code, ANSI Z223.1 - latest edition. In
Canada, all installations must conform with the current CAN/CGA - B149.1-10
Installation Code and/or local codes.
Warning
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
20
Section: Installation
Содержание EX Series
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