ACV CC105, Installation & Maintenance Manual, Page: 12 / 76

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3. Combustion Air & Venting
3.3 Combustion Air and Vent Piping
The CHALLENGER requires a Category IV venting system, which is
designed for pressurized venting and condensate.
The CHALLENGER is certified as a Direct Vent (sealed combustion)
appliance. A Direct Vent appliance utilizes uncontaminated outdoor air
piped directly to the appliance for combustion.
Install combustion air and vent pipe as detailed in the
CHALLENGER PVC, CPVC, and SS Vent Supplement in-
cluded in the appliance installation envelope. Refer to
instructions for parts list and method of installation.
Contact ACV-Triangle Tube for other venting options in-
cluding PVC Concentric Vent/Air Termination Supple-
ment or CHALLENGER Concentric Vent/Air System
Supplement. Refer to these instructions for parts list
and method of installation.
Verify installed combustion air and vent piping are
sealed gas tight and meet all provided instructions and
applicable codes. Failure to comply will result in sub-
stantial property damage, serious injury, or death.
3.4 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 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 ex-
isting boiler, the following steps shall be followed with
each appliance remaining connected to the common
venting system place in operation, while the other ap-
pliances connected to the common venting system are
not in operation.
Seal any unused openings in the common venting system. 1.
Visually inspect the venting system for proper size and 2.
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion, or other deficiencies which could
cause an unsafe condition.
NOTICE
NOTICE
DANGER
BEST PRACTICE
Insofar as is practical, close all exterior building doors and 3.
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.
Place in operation the appliance being inspected. Follow the
4.
lighting instructions. Adjust thermostat so the appliance will
operate continuously.
Test for spillage at the draft hood relief opening after 5 minutes
5.
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
6.
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 appliances to
their previous condition of use.
Any improper operation of the common venting system should
7.
be corrected so the installation conforms with the National Fuel
Gas Code (NFPA 54/ANSI Z223.1) and/or CAN/CSA B149.1.
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
Chapter 13 of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1) and/or CAN/CSA B149.1.
Do not install the CHALLENGER into a common vent
with other gas or oil appliances. This may cause flue
gas spillage or appliance malfunction, which will result
in substantial property damage, serious injury, or
death.
DANGER