fireplace dampers and other gas burning appliances to their previous conditions of use.
All boiler venting systems shall be installed in accordance with the National Fuel Gas Code, ANSI Z223.1 or
INTAKE/EXHAUST INSTALLATION REQUIREMENTS
1.The termination must be 12 inches (30.5 cm) above snow or grade level whichever is higher.
2.Due to normal formation of water vapor in the combustion process, horizontal terminations must not be located over areas of pedestrian or vehicular traffic, i.e. public walkways or over areas where condensate could create a nuisance or hazard. This is especially true in colder climates where ice buildup is likely to occur. A.O. Smith Corporation will not be held liable for any personal injury or property damage due to any dislodging of ice.
3.The exhaust terminal of the venting system must maintain a minimum clearance of 4 feet (1.22 m) horizontally from, and in no case above or below, unless a
4.The minimum distance from inside corner formed by two exterior walls is 6 feet (1.8 m) but 10 feet (3.1 m) is recommended where possible.
5.Maintain a minimum distance of 4 feet (1.2 m) from any soffit or eve vent to the exhaust terminal.
6.Maintain a minimum distance of 10 feet (3.1 m) from any forced air inlet. Fresh air or make up air inlet such as a dryer or furnace area is considered to be a forced air inlet.
7.Avoid areas where condensate drainage may cause problems such as above planters, patios, or adjacent to windows where the steam from the flue gases may cause fogging.
8.Select the point of wall penetration where the minimum 1/4" per foot (2 cm/m) of slope up can be maintained.
9.The through the wall termination kit is suitable for zero clearance to combustible materials.
10.The mid point of the termination elbow must be a minimum of 12 inches (30.5 cm) from the exterior wall.
SYSTEM INSTALLATION
GENERAL
If the system is to be filled with water for testing or other purposes during cold weather and before actual operation, care must be taken to prevent a down draft entering the boiler or freezing air from contacting the system. Failure to do so may cause the water in the system to freeze with resulting damage to the system. Damage due to freezing is not covered by the warranty.
Good practice requires that all piping, etc., be properly supported.
The boilers described in this manual may be used for space (hydronic) heating or for the heating of potable water. If the heater is to be used for hydronic space heating, follow the instructions on pages 16
INSTALLATION AS BOILER REPLACEMENT
Installation as boiler replacement on an old system with large water
CAUTION
STANDARD VENTING
DIRECT VENT APPLICATIONS
DIRECT VENTING INTO DEAD AIR SPACES SUCH AS ALLEYS, ATRIUMS AND INSIDE CORNERS CAN CAUSE RECIRCULATION OF FLUE GASES. RECIRCULATION OF FLUE GASES WILL CAUSE SOOTING, PREMATURE FAILURE OF THE HEAT EXCHANGER AND ICING OF THE COMBUSTION AIR INTAKE DURING SEVERE COLD WEATHER. TO PREVENT THE RECIRCULATION OF FLUE GASES, MAINTAIN AS MUCH DISTANCE AS POSSIBLE BETWEEN THE COMBUSTION AIR INTAKEAND THE EXHAUST VENTTERMINAL.
Note: Venting system of other than
Figure 5. Vent Termination Installation Clearances
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