Field Controls SWGII-5 Manual page 6

CONNECTING POWER VENTER TO APPLIANCE
Venting system should be installed and supported in accordance with the National Fuel Gas Code ANSI
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 pipe's rated
clearance. Always check local code requirements for code restrictions.
Route the vent pipe from the appliance to the power venter using as few 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 ANSI 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
TEMPERATURE
400ºF Or Less
400ºF To 550ºF
400ºF To 550ºF
INSTALLATION CLEARANCE WITH SINGLE WALL VENT PIPE
CLEARANCE (A)
⁄ "Minimum
1
2
1" Minimum
⁄ " Minimum With
1
2
Sheet Metal Liner
page 6
SINGLE PIPE SYSTEM
ALLOWABLE INLET
TEMPERATURE
400ºF Or Less
400ºF To 550ºF
400ºF To 550ºF
Diagram B
CLEARANCE (B)
3" Minimum
4" Minimum
3" Minimum With
Sheet Metal Liner