Draft Control Type RC Barometric

DRAFT CONTROLS

How Draft Controls Work

Static pressure of the cool air (1) Illustration A 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 (2) to flow (draft) through the unit and rise through the breaching and chimney.
Room temperature air (3) enters through the barometric draft control (4) 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.

Type RC

Oil or Coal – Residential and Commercial
The Field RC is furnished as standard equipment on many leading brands of oil or coal-fired heating equipment. It is calibrated to allow for easy adjustment to the furnace or boiler manufacturer’s specifications. Designed for settings from .02" to .08", this control is so sensitive that instrumentation should be used when adjusting the unit during installation.

Recommended Pipe Sizes (in.)

Model

Control Size

Nominal Capacity Sq. In.

Dia.

Circum.

4" RC/RCBT

12.6

3-4-5

9 1/2 to 15 3/4

2 1/2

2 5/16

4 9/16

2 1/2

5" RC/RCBT

19.6

4-5-6

12 1/2 to 19

2 1/2

2 5/16

5 9/16

2 1/2

6" RC/RCBT

28.3

5-6-7

15 3/4 to 22

1 7/8

6 5/8

2 3/4

7 5/8

7" RC/RCBT

38.5

6-7-8

19 to 25 1/4

2 5/8

3 1/2

2 1/2

7 5/8

2 3/4

8 5/8

8" RC/RCBT

50.3

7-8-9

22 to 28 1/8

4 3/8

3 3/8

8 11/16

1 1/8

2 5/8

9" RC/RCBT

63.6

8-9-10

25 1/4 to 31 1/2

5 1/8

4 1/2

3 3/4

9 11/16

1 1/2

2 5/8

12 1/4

MATERIAL GAUGES
Size	RING	GATE	COLLAR
4"	22	24	26
5"	24	24	26
6"	24	24	26
7"	22	24	26
8"	20	20	26
9"	20	20	26

Field Controls Replacement Part list & prices (Click Here)

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