Submittal Sheet
Figure 2
BAROMETRIC DRAFT CONTROLS
Model: 4”-7” RC
WARNING: Read the installation instructions carefully and completely
before proceeding with the installation.
ITEMS INCLUDED:
Barometric Draft Control
WHEN SHIPPED WITH A COLLAR ADDITIONAL ITEMS:
Mounting straps, Collar, Mounting Hardware
GENERAL INFORMATION
BAROMETRIC DRAFT CONTROLS WITH OR WITHOUT COLLAR
The Field RC is furnished as standard
equipment on many leading brands of oil
fired heating equipment. It is calibrated
to allow for easy adjustment to the
furnace or boiler manufactures
specifications. Designed for draft settings
from .02” to .08” inches of W.C.
CONTROL LOCATIONS
The control should be located as close
as possible to a furnace or boiler and
positioned as shown in Figure 1. It
should be 18” from a stack switch and at
least 18” from a combustible ceiling or
wall. Do not locate in a room separated
from the appliance. NOTE: When a
sheet metal tee is used instead of the
collar, the “B” dimension must not be
less than indicated for proper operation.
(See Figure 2 and Table 1)
COLLAR INSTALLATION
WHEN SHIPPED WITH A COLLAR
To attach the collar to the flue, see Figure 2 and follow the
instructions as follows:
1. Bend the two ears at the front corners of the collar outward. Bend
90°, ¼” behind the single hole on the straps.
2. Insert clamping screw in ears on collar and bolt the remainder of
the collar together.
3. Hold the collar against the side of the flue in the exact position it is to
be installed (shown by dotted lines) and mark the outline of the collar
on the flue.
4. Cut a hole in the flue about ½” inside of the outline.
5. Make a series of cuts about ½” apart from the edge of this hole to
the outline marks.
6. Strap the collar to the flue pipe.
7. Bend the tabs formed by the series of cuts outward against the inside of the collar to make a tight joint.
8. Insert the draft control. (See Installation & Adjustment)
If flue pipe is made of material too heavy to bend out into collar, make the diameter of the opening within ½” of the inside diameter of
the collar. Seal with high temperature RTV silicone or high temperature foil tape UL listed for the temperature of the application.
For proper settings and operation of the burner and the draft combustion testing instrumentation and draft gauges must be used.
Figure 1