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Black Tee With Draft Control

Control, Type RC/BT

Type RC/BT Draft Control for Wood or Coal Residential Equipment

The Field Type RCBT (Black Tee) draft control is furnished with a Tee pipe section. Designed for settings from .02″ to .08″, this control is so sensitive that instrumentation should be used when adjusting the unit during installation.

How do draft controls work? Static pressure of the cool air exerts pressure on the outside of the furnace or boiler, the breaching, and stack. The pressure difference between the room air and heated gas (air) causes products of combustion to flow (draft) through the unit and rise through the breach and chimney. Room temperature air enters through the barometric draft control in the precise amount needed to overcome the excess drafts caused by temperature variations, wind fluctuations, and barometric pressure changes. Combustion of fuel is complete and the process is stabilized. The velocity of combustion gases through the heat exchanger is slowed so more heat is extracted. The unit operates more efficiently, reliably, and requires less maintenance.

When to use a draft control? Refer to our Contractor Reference Guide on when to use a draft control with a draft inducer/power venter, power burners, forced draft burners, dual fuel appliances and gas-fired appliances.

Specifications

PART # MODEL CONTROL SIZE VOLTAGE NOMINAL CAPACITY (sq. in.)
RECOMMENDED PIPE SIZE (ins.)
Diameter Circumfrence
DIMENSIONS (ins.)
A B C D E G H M
46207204 5"RC/BT 5 19.6 4-5-6 12 1/2 to 19 5 2.5 2 2.3125 5.5625 1 2.5 7
02722704 6"RC/BT 6 28.3 5-6-7 15 3/4 to 22 6 1.875 3 2 6.625 1 2.75 7.625
01845404 8"RC/BT 8 50.3 7-8-9 22 to  28 1/8 8 4.375 4 3.375 8.6875 1.125 2.625 11
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