Field Controls SWG Stainless, SWGII Diagram B, INSTALLATION USING SINGLE WALL VENT PIPESee Table

Diagram B

CONNECTING POWER VENTER TO APPLIANCE

Venting system should be installed and supported in accordance with the National Flue Gas Code A.N.S.I.Z223.1, or in accordance with any local codes. A vent pipe connector shall be supported for the design and weight of the material employed, to maintain clearances, prevent physical damage and separation of joints. A vent pipe increaser or reducer may be required for connecting the power venter to the vent system. If needed, place the reducer close to the power venter. Smaller vent pipe sizes than a chimney-vented system may be used for the vent system.

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 (See Table 3)

Table 3

INSTALLATION CLEARANCE WITH SINGLE WALL VENT PIPE

DOUBLE PIPE SYSTEM			SINGLE PIPE SYSTEM
Allowable inlet	Allowable inlet		Allowable inlet	Allowable inlet
temperature		Clearance	temperature		Clearance
	temperature			temperature
SWG Stainless		(A)	SWG Stainless		(B)
	SWG/SWGII			SWG/SWGII
Steel			Steel
400°F or less	400°F or less	1/2”	400°F or less	400°F or less	3”
		minimum			minimum
400°F to	400°F to 550°F	1”	400°F to	400°F to 550°F	4”
650°F US/575°F CA		minimum	650°F US/575°F CA		minimum
400°F to		1/2”	400°F to		3”
	400°F to 550°F	minimum		400°F to 550°F	minimum
650°F US/575°F CA		with sheet	650°F US/575°F CA		with sheet
		metal liner			metal liner
Use a PEK series extension kit or follow installation method below for a double pipe system. 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
the power venter. (See Figure 5) This allows clearance for the adjustment damper. Install the
needed pipe extensions and terminate the outer pipe extension with the end pipe cover (see
Diagram B). The table above 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					Figure 5
guidelines when determining clearances. Figure 6 shows how the airflow pattern through an
SWG reduces the required clearances to combustibles. NOTE: Vent pipe joints should be
secured with at least (3) three sheet metal screws.

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