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 CO
2
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.
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.
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 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.
