Field Controls SWG Stainless, SWGII installation instructions For 3 *RATIOS d/D

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PROCEDURE FOR CALCULATING TOTAL EQUIVALENT PIPE LENGTH IN FEET

1.Calculate the total equivalent feet for each type of fitting used in the venting system from the chart below.

2.Calculate the total amount of feet for the straight lengths of vent pipe.

3.Add the equivalent feet for the fitting with the total amount of feet of straight lengths. This will approximate the total equivalent feet of the vent system.

Table 2

EQUIVALENT LENGTH (FEET) OF VENT PIPE FOR VENT PIPE FITTING

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUDDEN REDUCER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR INCREASER

1/4

8

11

14

17

19

22

25

 

 

28

 

 

FOR 3 *RATIOS (d/D)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2

5

7

8

10

12

13

15

 

 

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3/4

2

3

3

4

4

5

6

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*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 feet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

would be 7 feet. (See Figure 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 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, 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.

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.

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Contents Contents Typical Venting System ComponentsOptional System Components General System InformationInstallation Safety Instructions Control KitsOIL GAS Maximum Equivalent Feet of Vent Pipe For 3 *RATIOS d/D Diagram a Double Pipe System Single Pipe System SWG/SWGIIWiring Class B and Class L Double Wall Vent Pipe InstallationAIR Flow Adjustments General Installation Inspection MaintenanceReplacement Parts Model Repair Motor Assembly Blower WheelSWG/SWGII-4HD SWG/SWGII-5Installation Initial Burner and Venting System Operational Information DateFor GAS Fired Equipment For OIL Fired Equipment46139100 Rev J 05/01

SWGII, SWG, SWG Stainless specifications

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