Field Controls 46256400 Manual page 6

If mounting venting system near combustible materials, refer to Diagram B for allowable installation clearances.
Clearances are based on an installation using single wall galvanized steel vent pipe. For metal thickness of galvanized
steel pipe connectors, refer to NFPA 211 or NFPA 54 Standards for guidelines. If manufactured double wall vent pipe is
required or used for the installation, clearance should be based on the vent pipes rated clearance. Always check local
code requirements for code restrictions.
Route the vent pipe from the appliance to the power venter using a minimum number of elbows as possible. The
horizontal section of the vent pipe should have a slight upward slope from the appliance to the power venter. For
clearances to combustible materials, multiple appliance venting and other installation requirements, refer to the National
Fuel Gas Code A.N.S.I.Z223.1, and/or any applicable local codes or appliance manufacturer's installation instructions.
INSTALLATION USING SINGLE WALL VENT PIPE
DOUBLE PIPE SYSTEM
ALLOWABLE INLET
TEPERATURE
400°F OR LESS
400°F TO 550°F
400°F TO 550°F
To install an outer pipe extension to the SWG power venter, the end pipe cover on the power
venter must be removed. Then, cut a 1-inch square notch into the vent pipe extension before
attaching to the power venter. (See Figure 6) This allows clearance for the adjustment damper.
Install the required length of outer pipe extension lengths as needed for clearance to combustible
materials. Terminate the outer pipe extension with the end pipe cover. (See Diagram B) The table
shows minimum allowable clearances when using single or double pipe systems. When the outer
pipe is extended over the inner pipe use the double pipe guidelines when determining clearances.
NOTE: Vent pipe joints should be secured with at least (3) three sheet metal screws.
INSTALLATION CLEARANCE WITH SINGLE WALL VENT PIPE
CLEARANCE (A)
½ INCH MINIMUM
1 INCH MINIMUM
½ INCH MINIMUM WITH
SHEET METAL LINER
SINGLE PIPE SYSTEM
ALLOWABLE INLET
TEMPERATURE
400°F OR LESS
400°F TO 550°F
400°F TO 550°F
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Diagram B
CLEARANCE (B)
3 INCH MINIMUM
4 INCH MINIMUM
3 INCH MINIMUM WITH
SHEET METAL LINER
Figure 6
Figure 7