Accel CS Boiler - Gas Heat - Eighth Edition – January, 2015 11
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 after five minutes of main burner operation. Use a draft gauge or pressure gauge to verify that the vent
pipe at the breech of the appliance is under draft (negative pressure) relative to the room.
6. Repeat steps 4 and 5 for each appliance connected to the common venting system, one appliance at a time.
7. 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.
8. Any improper operation of the common venting system should be corrected so the installation conforms to the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CGA B149 Installation Codes. 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/CGA B149,
Installation Codes.
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