Field Controls B-34TJ User Manual

DRAFT REGULATOR

Model: B-34TJ

LISTED UNDER RE-EXAMINATION SERVICE OF UNDERWRITERS

LABORATORIES, INC. LISTED UNDER LABEL SERVICE OF CANADIAN
STANDARDS ASSOCIATION. NOT CSA CERTIFIED FOR SOLID FUELS.

The regulator contained in this package is manufactured with
careful precision. It is designed to regulate chimney draft with a
high degree of accuracy and fuel efficiency.

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INSTALLATION OF TEE SECTION

Figure 9

Locate the draft control as near to the furnace or boiler as possible. If the
installation has a smokepipe stack control, locate the regulator at least 18" away
from the stack control. (See Figures 3-9)

FOR WOOD FUEL

When burning wood, creosote builds up in the flue pipe. For this reason the tee
should be assembled so that the beaded and crimped end is pointed downward.
This prevents seepage at the joints. (See Figure 1)

FOR OTHER FUEL

Figure 2Figure 1

Install tee with beaded and crimped end pointed upward. (See Figure 2)

NOTE: Damper must be mounted with the hinge pins horizontal and the face of the damper plumb for correct operation.
This is done by rotating the damper section within the collar for any pipe position. Tighten screw to hold firmly in place.

BEST LOCATIONS FOR OIL OR SOLID FUELS Figures 3-8

*Selected sizes CSA and UL approved. Not CSA certified for solid fuels.

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BALANCING WEIGHT ASSEMBLY AND DRAFT ADJUSTMENT

Figure 10

Figure 11

TYPE B-34 (See Figure 10)

1. Assemble the “counter balance weight assembly” to the draft control
as shown in Figure 10 Thread “counter balance weight” through
“threaded nut” attached to the vane. Assemble “hex nut” and “knurled
nut” on front of vane as shown in Figure 10.

2. Turn “knurled nut” counter clockwise for less draft, clockwise for more
draft.

3. When adjustment is made for desired draft, lock the “counter balance
weight assembly” in place by tightening the “hex nut” located under
the “knurled nut” against the vane.

TYPE DR (See Figure 11)

1. Assemble the “carriage bolt” through the “weight support bracket” attached to
vane.

2. Thread tapered “counter balance weight” on “carriage bolt” (tapered portion of
weight must point toward bottom of draft control). For less draft, slide “counter
balance weight assembly” toward “Lo” position marked on the bracket; for more
draft, slide “counter balance weight assembly” toward “Hi” position.

3. When adjustment is made for desired draft, tighten weight securely to “carriage
bolt”. Vertical installation: The 8” and 9” sizes, when mounted in vertical installations
only, require a small screw and nut (supplied) assembled in the hole at the bottom
vane. The 6” and 7” regulators do not require this additional hardware in vertical installation.

WOOD AND COAL FIRED APPLICATIONS

1. Installations of this Draft Control should be made in accordance with the stove manufacturer's instructions. When this
is not possible, follow the directions below: (NOTE: For the regulator to operate properly, the chimney must be clean
and free of obstructions.

2. The best setting for wood and coal burners is a draft gauge reading of .04” to .08 W.C. If a draft gauge is not
available, with the draft regulator fully installed and a good fire burning, adjust the counterbalance weight closer to the
gate for as low a draft setting as possible, without the fire dying or getting smoke-back with the stove door slightly
open. To obtain higher heat levels, move the weight away from the gate to increase the setting.

3. For best combustion efficiency, stack temperature (below the draft regulator) should be 350° to 450° F for dry wood.
Recommended stack temperatures and draft settings for coal vary according to the manufacturer of the stove.

OIL FIRED APPLICATIONS

Proper operation of the regulator depends upon proper installation and adjustment. Use a CO2 indicator, stack
thermometer and draft gauge to adjust draft for oil fired burners. Domestic oil burners work best with the draft over fire of
.01 to .02-inches W.C.

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