Field Controls SWG-AF Série Mode D'emploi page 4

*Reducer or increaser ratio (d/D) small diameter divided reducer ratio is d/D =
4/8 = 1/2. To estimate the equivalent foot length for the fitting, use the smaller
pipe diameter for the equivalent length figure. Example 4" to 8" reducer; the
reducer ratio is 1/2 and the smaller pipe diameter is 4". So, from the chart,
the equivalent length would be 7 feet (see Figure 1).
Example: System Pipe Size = 4"
Step 1 Two 4" 90° elbows @ 7 feet each = 14 ft.
Step 2 Ten 2 foot lengths of 4" pipe = 20 ft.
Step 3 Total equivalent feet = 14 ft. + 20 ft. = 34 ft.
INSTALLING SWG-AF POWER VENT
WARNING: Failure to install, maintain and/or operate the power vent system in accordance with manufacturer's
instructions can result in conditions which may cause Death, Bodily Injury and/or Property Damage.
1. Remove power vent from box and inspect unit for damage. If the carton has been crushed or mutilated, check unit
very carefully for damage. Rotate blower wheel to insure that the motor and blower wheel rotate freely. DO NOT
install if any damage is apparent. Refer to Table 1 (Page 3) to check for proper vent sizing.
2. Location of the termination of the venting system should be determined according to in:
United States

NFPA 211 Standard for Chimneys, Fireplaces, Vents and Solid Fuel-Burning Appliances, the International
Mechanical Code and / or International Residential Code. The appliance manufacturer's installation
instructions and /or local codes and the authority having jurisdiction.

See requirements below or refer to installation location, Diagram A (Page 5), for typical locations.
Canada

CSA B365 Installation Code for Solid Fuel-Burning Appliances and Equipment and any other federal,
provincial, local code requirement and the manufacturer's installation instructions.

See requirements below or refer to installation location, Diagram A (Page 5), for typical locations.
a. The exit termination of mechanical draft systems shall not be less than 7' above grade when located adjacent to
public walkways.
b. A venting system shall terminate at least 3' above any forced air inlet located within 10'.
c. The venting system of other than a direct vent appliance shall terminate at least 4' below, 4' horizontally from or 1'
above any door, window or gravity air inlet into the building.
d. The vent termination point shall not be installed closer than 4' from an inside corner of an L-shaped structure.
e. The vent termination should not be mounted directly above, or within 3' horizontally from an oil tank vent or gas
meter.
f. The bottom of the vent terminal outlet shall be at least 12" above finished grade or typical yearly snow line. If this
is not possible use the SWG-VR-AF series power vent riser.
g. The area in front of power vent and 4' either side of power vent MUST be clear of any obstruction. Such as:
landscaping plants, landscaping mulch, landscaping timbers etc.
h. DO NOT install over wood deck.
i. DO NOT install under a deck.
3. Before starting refer to Typical Installation Configuration Diagram on Page 15. Familiarize yourself with the layout of
an installation. Determine the vent system termination location (See Diagram A on Page 5) and prepare the
installation area: When through the wall vent penetration must be near or below the surrounding grade use a SWG-
VR-AF series power vent riser. Provision must be made to protect the vent riser from standing water. A well structure
must be used with adequate drainage and protection from water runoff. When a well structure is utilized, adequate
clearance from the well wall to the vent riser MUST allow for installation, inspection and cleaning of debris. It is
recommended that a sill structure and grating be employed to help prevent water and debris entry into the well (See
Figure 4). Refer to local building codes governing such structures.
½ 7
¾ 3
Page 4
8 10 12
3 4 4
13
5
Figure 1