CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
A.O. Smith – Technical Training Department
9
Ashland City, Tennessee © 200
9
Servicing should only be performed by a Qualified Service Agent
316586-000
CYCLONE VENTING
Category IV
• Positive pressure in vent, above atmospheric.
• These models will produce excessive condensate in vent.
• Vent system must not be combined with any other appliances.
• Flue gas temperatures less than 140°F.
• 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.
Type venting
• 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.
Vertical and horizontal
Vent system can be terminated vertically or horizontally (side
wall).
Vent materials
• PVC schedule 40.
• CPVC schedule 40.
• ABS schedule 40.
• Cellular Core PVC.
Concentric Venting
Concentric vent kits for all models.
INSTALLATION – VENTING CATEGORY AND MATERIALS
