A.O. Smith BPD-400 - Manual (Page 11)

11
FIGURE 9
WIRE FENCE
When the water heater outlet terminal is low enough to be touched
accidentally, or is accessible to small children, a wire mesh chain link
fence (as shown in Figure 9) may be used. Care should be taken to
maintain adequate ventilation around the outlet terminal. If a chain link
fence is installed, it must not be used as a storage area for items that
may block proper ventilation.
FIGURE 9
WARNING
THE LOCATION SELECTED MUST PROVIDE CLEARANCES FOR SERVICING
AND PROPER OPERATION OF THE WATER HEATER.
WARNING
VENT TERMINATION MUST NOT BE WITHIN 4 FEET OF ANY ITEMS SUCH AS GAS
METERS, GAS VALVES OR OTHER GAS REGULATING EQUIPMENT.
WARNING
FAILURE TO HAVE REQUIRED CLEARANCES BETWEEN WATER HEATER
AND COMBUSTIBLE MATERIAL WILL RESULT IN A FIRE HAZARD.
FIGURE 7
FACTS TO CONSIDER ABOUT THE LOCATION
VENTING THROUGH ROOF-CLEARANCES
• 1" (2.5 cm) clearance for 4" or 6" PVC or CPVC piping from
combustible surfaces for outlet piping.
• 0" clearance for 4" or 6" PVC or CPVC piping from combustible
surfaces for inlet piping.
• The Power Direct Vent inlet and outlet terminals shall terminate at
least 18" (46 cm) above the roof surface. See Figure 10.
• The venting system must be installed in a manner which allows
inspection of the installation of the venting pipes and joints as well as
periodic inspection after installation as required by ANSI Standards.
FIGURE 8 - DIRECT VENT TERMINAL CLEARANCES - US INSTALLATION