Field Controls 46229000, Manual

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Figure 2
E
QUIVALENT
L
ENGTH
(F
EET
) O
F
V
ENT
P
IPE
F
OR
V
ENT
P
IPE
F
ITTING
VENT PIPE DIAMETER
VENT PIPE
FITTINGS
3” 4” 5” 6” 7” 8” 9” 10”
TEE
19 25 31 38 44 50 56 63
90° ELBOW
5 7 9 11 12 14 16 18
45° ELBOW
3 4 4 5 6 7 8 9
d/D
¼
8 11 14 17 19 22 25 28
½ 5 7 8 10 12 13 15 17
SUDDEN
REDUCER OR
INCREASER
FOR THREE
*RATIOS (d/D)
¾ 2 3 3 4 4 5 6 6
*Reducer or increaser ratio (d/D) small diameter divided by the larger diameter.
Example 4" to 8" reducer: The 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. See Figure 2. 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.
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.
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 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 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,
A.N.S.I.Z223.1, and/or manufacturer's recommendations 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.
d. The vent termination of a direct vent appliance with an input of 50,000 BTU's 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 BTU's
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 finished grade.
3.
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