Field Controls SWG Stainless Series Manual page 4

Table 2
VENT PIPE FITTINGS
TEE
90º ELBOW
45º ELBOW
SUDDEN REDUCER OR INCREASER
FOR 3 *RATIOS (d/D)
*Reducer or increaser ratio (d/D) small diameter divided reducer ratio is d/D =
To estimate the equivalent foot length for the fi tting, use the smaller pipe diameter for the
equivalent length fi gure. Example 4" to 8" reducer; the reducer ratio is 1/2 and the smaller
pipe diameter is 4". So, from the chart, the equivalent feet 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.
INSTALLATION
CAUTION: Failure to install, maintain and/or operate the power venting system in accordance with
manufacturer's instructions will result in conditions which may produce bodily injury
and/or property damage.
1. Remove power venter from packaging and inspect unit for damage. If the packaging has been crushed or
mutilated, check unit very carefully for damage. Rotate blower wheel to ensure that the motor and blower
wheel rotate freely. DO NOT install if any damage is apparent. Refer to unit sizing chart to check proper venting
sizing.
2. Location of the termination of the venting system should be installed in accordance with the National Fuel Gas
Code ANSI Z223.1, manufacturer's recommendations and/or local codes which are applicable. See requirements
below or refer to installation location, Diagram A, 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. When venting oil fi red equipment with a Field Control's
CAS-2 series Airboot
d.
The vent termination of a direct vent appliance with an input of 50,000 BTUs per hour or less shall be located at least
9" from any opening through which vented gases could enter the building. With an input over 50,000 BTUs per hour,
a 12" termination clearance shall be required.
e.
The vent termination point shall not be installed closer than 3' from an inside corner of an L-shaped structure.
f.
The vent termination should not be mounted directly above, or within 3' horizontally from an oil tank vent or gas
meter.
g.
The bottom of the vent terminal shall be located at least 12" above fi nished grade.
3. After determining the location of the venting system termination point (See Diagram A), cut a square hole
through the wall at least 1" larger than the outer pipe diameter of the power venter. Mount the power venter
through the wall, keeping the outer pipe centered in the hole. (See Figure 3) Fasten the power venter to the
outside wall with appropriate fasteners, sealing the edges of the power venter base plate to the wall with a high
temperature silicone sealant. DO NOT enclose the spaced plates on the power venter body. This will result in
reduced cooling of the power venter body. Wood or vinyl siding should be cut so that the unit mounts directly
on the wall board to provide a stable support. If the siding is greater than
behind the power venter mounting plate. (See Figure 2)
P/N 46139100 Rev P 08/19
EQUIVALENT LENGTH (FEET) OF VENT PIPE FITTING
3"
19
d/D
1
⁄
4
1 ⁄
2
3 ⁄
4
®
kit, the intake air hood can be mounted within 12 inches of the power venter exhaust.
page 4 of 12
VENT PIPE DIAMETER
4" 5" 6"
25 31 38
5 7 9 11
3 4 4 5
8 11 14 17
5 7 8 10
2 3 3 4
4 1
⁄ = ⁄ .
8 2
7" 8" 9"
44 50 56
12 14 16
6 7 8
19 22 25
12 13 15
4 5 6
1 ⁄ " thick use a spacer plate or board
2
10"
63
18
9
28
17
6
Figure 1