Vermont Casting RADVTCB - Manual (Page 9)

9
Radiance Direct Vent Gas Heater
20012697
Vertical Termination
A vertical vent system must terminate no less than 8’
(2.44 m) and no more than 40’ (12 m) above the ap-
pliance flue collar. A restrictor plate (supplied) must be
used, where specified, in all vertically terminated vent
systems. (Refer to Figure 8) NOTE: The restrictor
plate supplied with the vertical termination should
be discarded. Adjust the restrictor plate according
to recommendations in Figure 10. A vertically termi-
nated vent system must also conform to the following
criteria:
• No more than three 90° elbows may be used.
• Two 45° elbows may be substituted for one 90˚
elbow. No more than six 45° elbows may be used.
• Vent must rise a minimum of 2 feet (305 mm) before
offset is used.
• Termination height must conform to roof clearance
as specified in Figure 11.
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Vertical Run (in feet)
(Measure from the appliance flue collar to the top of the vent
pipe.)
Horizontal Run (in feet)
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ST132a
FDV28
Vertical
vent run
12/3/99 djt
ST132a
Fig. 8 Vertical vent termination window.
Restrictor Plate Adjustment
for Extended Pipe Runs
The Radiance stove is shipped with a restrictor plate
in the Parts Bag. Adjustments can be made by loosen-
ing the adjustment screw to allow the restrictor plate to
slide up or down. (Fig. 9) A guide for usage is shown in
Figure 10.
NOTE: Some installations may require some adjust-
ment by the installer for optimum flame appearance.
Optimum flame appearance is a flame that is not sub-
ject to tall, dirty yellow flames producing soot or flames
lifting off of the ember bed ports.
Restrictor Plate Adjustment
1. Remove the screw in the back wall of the firebox.
2. Install restrictor plate as shown in Figure 9 with cut
out on left side. Secure with adjustment screw.
2. Measure from center of screw to top edge of diverter
(Fig. 9) to adjust plate according to guidelines in
Figure 10.
3. Tighten attachment screw.
4. Install logs following log installation instructions.
ST917
restrictor plate
6/07
Adjustment Screw
ST917
Fig. 9 Loosen screw to adjust restrictor plate.
Figure 10
Examples for Extended Run/Restrictor Plate Settings
1. Vertical 20’ (6 m), 90° elbow, out 8’ (2.4 m)
2. Vertical 11’ (3.4 m), 90° elbow, out 2’ (610 mm)
3. Vertical 40’ (12 m)
4. Vertical 5’ (1.5 m), 90° elbow, out 5’ (1.5 m)
Restrictor plate measurement from top of plate to center of
screw:
1. 2³⁄₄” (70 mm) from center of screw to top edge of plate
2. Plate down to top of slot
3. Plate down to top of slot
4. 2³⁄₈” (60 mm) from center of screw to top edge of plate
**
Unacceptable
Venting Configuration
**No Restrictor
Plate
All Vertical Ter-
minations in this
area Require use
of the Restrictor
Plate*
Vertical terminations
must be within this
area