Install Instructions

9
Combustion Air and Venting
Removal of an Existing Boiler and or Water
Heater from a Common Vent System
When an existing boiler and/or water
heater is removed from a common vent-
ing 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 and/or water
heater, the following steps shall be fol-
lowed with each appliance remaining
connected to the common venting system
placed in operation, while the other appli-
ances remaining connected to the com-
mon venting system are not in operation.
1. Seal any unused openings in the common
venting system.
2. Visually inspect the venting system for
proper size and horizontal pitch and deter-
mine there is no blockage or restriction,
leakage, corrosion and other deficiencies
which could cause an unsafe condition.
3. Insofar as is practical, close all building
doors and windows and all doors between
the space in which the appliances remain-
ing connected to the common venting sys-
tem 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.
4. Place in operation the appliance being
inspected. Follow the lighting instructions.
Adjust thermostat so 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 can-
dle, or smoke from a cigarette, cigar or pipe.
6. After it has been determined that each
appliance remaining connected to the com-
mon venting system properly vents when
tested as outlined above, return doors, win-
dows, 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, 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 II of the
National Fuel Gas Code ANSI
Z223.1/NFPA 54 and/or CAN/CSA
B149.1, Installation codes.
Do not install the CHALLENGER into a
common vent with other gas or oil appli-
ances. This may cause flue gas spillage or
appliance malfunction, resulting in possi-
ble severe personal injury, death or sub-
stantial property damage.
DANGER
BEST PRACTICE