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The boiler is not intended to be common vented with any other existing appliance!
Boiler removal from a common vent system
At the time of removal of an existing heater, 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 common venting system are not operating.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch to determine if there is
blockage, leakage, corrosion or other deficiencies that could cause an unsafe condition.
3. If practical, close all building doors, windows and all doors between the space in which the appli-
ance remains connected to the common venting system located and other spaces in the building.
Turn on clothes dryers and any appliances not connected to the common venting system. Turn on
any exhaust fans, such as range hoods and bathroom exhausts, at maximum speed. Do not
operate a summer exhaust fan. Close all fireplace dampers.
4. Place in operation the appliance being inspected. Follow the lighting instructions. Adjust the
thermostat so the 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.
6. After it has been determined that each appliance remaining connected to common venting system
properly vents when tested as outlined, 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 deter-
mined 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.
DANGER
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