Installation - Venting Category And Materials - A.O. Smith BTH 120 Series Service Handbook

INSTALLATION – VENTING CATEGORY AND MATERIALS
Category IV
Type venting
Vertical and horizontal
Vent materials
Concentric Venting
10
CYCLONE VENTING
• Positive pressure in vent, above atmospheric.
• These models will produce excessive condensate in vent.
• Vent system must not be combined with any other appliances.
• Condensing water heater, thermal efficiency of this product will produce condensate in
the vent system, the heater is equipped with provision for draining condensate from vent
system.
• PH of condensate approximately 3.59; within tolerance for cast iron drains.
• May be installed Direct Vent; draws all fresh air for combustion from and discharges flue
gases to the outdoor atmosphere through 2 pipes.
• May be installed Conventional Vent; uses room air for combustion and discharges flue
gases to the outdoor atmosphere through 1 pipe.
Vent system can be terminated vertically or horizontally (side wall).
• PVC schedule 40.
• CPVC schedule 40.
• ABS schedule 40.
Concentric vent kits for all models.
Servicing should only be performed by a Qualified Service Technician