Bryant BW9, Installation, Start-Up, And Operating Instructions Manual, Page: 7 / 52

E. Combustion Air and Vent Pipe Requirements
This boiler requires a dedicated direct vent system. In a direct vent system, all air for combustion is taken directly from outside atmosphere, and
all flue products are discharged to outside atmosphere. Combustion air and vent pipe connections must terminate together in the same atmospheric
pressure zone, either through the roof or sidewall (roof termination preferred). See Fig. 10, 11, 12, and 13 for required clearances.
WARNING: Keep boiler area clean of debris and free of flammable and combustible materials, vapors and liquids.
Failure to follow this warning could result in explosion, electrical shock, fire, personal injury, or death.
WARNING: Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide
poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, local gas supplier, or your distributor or branch for information or assistance.
The qualified installer or agency must use only factory-authorized and listed kits or accessories when modifying this
product. Failure to follow this warning can cause electrical shock, fire, personal injury, or death.
WARNING: When vent pipe is exposed to temperature below freezing, such as when it passes through an unheated
space or when a chimney is used as a raceway, vent pipe must be insulated with 1/2–in. Armaflex or equivalent. In extreme
cold climate areas, use 3/4–in. Armaflex or equivalent. Combustion air must be clean outdoor air. Combustion air must not
be taken from inside structure because that air frequently is contaminated by halogens, which include fluorides, chlorides,
phosphates, bromides, and iodides. These elements are found in aerosols, detergents, bleaches, cleaning solvents, salts, air
fresheners, paints, adhesives and other household products. Locate combustion air inlet as far away as possible from
swimming pool and swimming pool pump house. All combustion air and vent pipes must be airtight and watertight.
Combustion air and vent piping must also terminate exactly as shown in Fig. 10, 11, 12, and 13. Vent connections serving
appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under
positive pressure. Solvent cements are combustible. Keep away from heat, sparks, and open flame. Use only in well
ventilated areas. Avoid breathing in vapor or allowing contact with skin or eyes. Failure to follow the aforementioned
warnings could result in fire, property damage, personal injury, or death.
F. Condensate Drain Requirements
Condensate drain line to be pitched to floor drain at a minimum of 1/4-in. per foot. An external condensate pump (not furnished) may be used
if floor drain is not available. The condensate pump must be designed for flue gas condensate application.
NOTE:
1. Condensate trap is built into boiler. External trap is not required and should not be used.
2. Wood frame or blocks may be used to raise boiler to maintain drain pitch or to be above external condensate pump reservoir.
3. There is a 115 volt AC receptacle provided on the service switch junction box which is located at the boiler right side, to provide power
for an external condensate pump (if needed).
4. The receptical is wired ahead of the ON/OFF switch assembly. If the switch is turned off, the receptical is still energized.
G. Foundation Requirements
Boiler must be placed on level surface. Boiler is NOT to be installed on carpeting.
NOTE:
1. If boiler is not level, condensate drain lines will not function properly. Adjustable feet are located on the boiler to make up for minor surface
irregularities or tilt.
2. Wood frame or blocks may be used to raise boiler to maintain drain pitch or to be above external condensate pump reservoir.
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