Removal Of An Existing Boiler From A Common Vent System - Aerco Esteem 399 Installation, Operation & Maintenance Manual

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3.8 REMOVAL OF AN EXISTING BOILER FROM A COMMON VENT SYSTEM

Do not install the esteem unit into a common vent with other gas
or oil appliances. This may cause flue gas spillage or appliance
malfunction, resulting in possible severe personal injury, death or
substantial property damage.
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 remaining appliances.
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 openings 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 which 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.
• Operate the appliance being inspected. Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.
•
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.
•
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.
•
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/CGA B149, Installation codes. When re-sizing any portion of the common venting
system, the common venting system should be re-sized to approach the appropriate
tables in Part II of the National Fuel Gas Code ANSI Z223.1/NFPA 54 and/or CAN/CGA
B149, Installation codes.
Page 26 of 188
02/05/2019
Esteem 399 Low NOx Boiler
Installation, Operation & Maintenance Manual Combustion Air/Venting
WARNING!
NOTE
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
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