1
Determine boiler location
12
When removing a boiler from existing
common vent system:
Do not install the Knight XL into a
common vent with any other appliance.
This will cause flue gas spillage or appliance
malfunction, resulting in possible severe
personal injury, death, or substantial
property damage.
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.
a. Seal any unused openings in the common venting
system.
b. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage
or restriction, leakage, corrosion, or other deficiencies,
which could cause an unsafe condition.
c. Test vent system – 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.
d. Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance
will operate continuously.
e. 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.
f. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined herein, return
doors, windows, exhaust fans, fireplace dampers, and any
other gas-burning appliance to their previous conditions
of use.
⚠
DANGER
g. 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
and/or CAN/CSA B149.1, Natural Gas and Propane
Installation Code.
Installation & Operation Manual
