Field Controls B-34TJ - Manual (Page 3)

Page 3
BALANCING WEIGHT ASSEMBLY AND DRAFT ADJUSTMENT
T
YPE 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.
T YPE D R (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 CO
2
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.
Figure 10
Figure 11