Combustion Blower Dip Switch Settings

To assure optimum efficiency and reduced noise levels, the combustion blower switch has two dip switch settings. Dip switch number 1, the top dip switch, is shipped from the factory set to the ON position to compensate for the maximum vent/air intake length.

Depending upon the vent/air intake length of the installation, dip switch number 1 may need to be adjusted to compensate for the venting system distance.

When the equivalent length of vent pipe, D, is less than 19 feet (5.7 m), move dip switch number 1 to the OFF position.

When the equivalent length of vent pipe, D, is 19 feet (5.7 m) or more, leave dip switch number 1 in the ON position.

Dip switch number 1 is located in the top row of dip switches, 1 through 8 on the PC board. See the following diagram to identify the correct switch. If you do not understand the information concerning the dip switch settings or the location of the dip switch, contact Bradford White Sales (800-532-4020) or Technical Service (800-334-3393) for assistance. Use the following examples and the previous discussion on calculating the equivalent vent length to determine the correct setting for dip switch number 1.

Example #1:

You have 6 feet (1.82 m) of vent pipe and one 90° elbow.

D = 6 + (1 x 6) + (0 x 1.5)

D = 12 feet of equivalent vent pipe

Dip switch number 1 should be moved to OFF position.

Example #2:

You have 15 feet (4.57 m) of vent pipe and two 90° elbows.

D = 15 + (2 x 6) + (0 x 1.5)

D = 27 feet of equivalent vent pipe

Leave dip switch number 1 in the ON position (default setting).

Figure 13. Dip Switch

Settings.

WARNING

Do not alter dip switch number 1 before using the formula and venting charts to determine the equivalent vent length. All other dip switches with the exception of dip switch number 1, shown in the illustration, MUST NOT be altered unless instructed to do so. Unauthorized adjustments can cause property damage, personal injury, scalding, or death.

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Bradford-White Corp TG-199I-N(X), TG237I-N(X), TG-150I-N(X), TG-180I-N(X) Combustion Blower Dip Switch Settings
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