Field Controls 46001000, B-34, DR Installation Instruction

INSTALLATION INSTRUCTION

THE FIELD CONTROLS COMPANY

DRAFT REGULATORS (3"-10")

TYPES B34, AND DR

READ CAREFULLY

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. The control may be
marked B-34 or DR. The basic draft adjustments are similar, but where variations apply, the
following paragraphs will explain the procedure.
Proper operation of the regulator depends upon proper installation and adjustment. Use a CO2
indicator, stack thermometer and draft gauge to adjust oil or solid fuel burners. Domestic oil
burners work best with the draft over fire of .01 to .02-inches W.C.
Solid fuel burners work best with over-fire draft of .04 to .08. Excessively high draft settings
over the fire create smokey fires and pulsation.

Step 1 Weight assembly must be attached to

damper prior to its installation in flue
pipe, refer to appropriate illustration
below.

Step 2 LOCATION OF DRAFT CONTROL (See Figs.

3-8)
Locate the draft control as near to the
furnace or boiler as possible. If the
installation has a smoke pipe stack control,
locate the regulator at least 18" away from
the stack control.

BEST LOCATIONS FOR
OIL OR SOLID FUELS

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

solid fuels.

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.

Step 3 BALANCING WEIGHT ASSEMBLY AND DRAFT ADJUSTMENT

as shown in Fig. 1.

TYPE B-34 (See Fig. 1)

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

Tighten screws to hold firmly
in place.

Turn "knurled nut" counter clockwise for less draft, clockwise for more draft.
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 Fig. 2)

Assemble the "carriage bolt" through the "weight support bracket" attached to vane.
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
"Low" position marked on the bracket; for more draft, slide "counter balance weight assembly"
toward "Hi" position.
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 a vertical installation.

Directions for Assembly/Installation of Collar
READ CAREFULLY - DON'T GUESS

If draft regulator is purchased without a collar or a tee joint, the depth "B" of the collar (Fig.

10) or the stub of the tee joint used must be of adequate length to avoid the damper plate entering
the flue pipe - preventing flow interference.See Fig. 10 below.

ONE-PIECE EARED COLLAR - (Fig. 1) Supplied
W/3"-5" B34

- Hook tongues "A" together to form a round collar.

- Pull the assembled collar outward until the tongues are
seated in the slots and recess.

- With the tongues recessed, flatten tongues with a pair of
pliers.Bend the tip of each tongue into the open slot, thus
entirely closing the slot opening.

- Now bend the lugs "B" outward at a 90o angle. Insert bolt
through lugs and place nut on it.

- Proceed with instructions starting at paragraph 2 (a)
below under "TWO-PIECE EARED COLLAR".

ONE-PIECE ROLLED COLLAR - (Fig. 2) Supplied
W/6" & 7" B34 & DR

- Bend the lugs "A"" outward at 90o angle.

- Simply align the holes "B" toward the back of the collar
and bolt together.

- Insert bolt through lugs "A", place a nut on it, but do
not tighten until the damper section is in place.

- Proceed with instructions starting at paragraph 2 (a)
below under"TWO-PIECE EARED COLLAR".

TWO-PIECE ROLLED COLLAR - (Fig. 3) Supplied
W/8" & 9" B34 & DR

- Bend the lugs "A" outward at 90o angle.Simply align the
holes"B"in the two collar halves and bolt together with the
hardware supplied.

- Insert longer bolt through lugs "A"place nut on it but do
not tighten until the damper section is in place.

- Proceed with instructions starting at paragraph 2 (a)
below under "TWO-PIECE EARED COLLAR".