Vermont Castings Radiance RADVT Series Installation & Operating Manual page 9

Vertical Termination
A vertical vent system must terminate no less than 8' (2.44 m)
and no more than 40' (12 m) above the appliance flue collar.
A restrictor plate (supplied) must be used, where specified,
in all vertically terminated vent systems. (Refer to Figure
2.8) NOTE: The restrictor plate supplied with the vertical
termination should be discarded. Adjust the restrictor plate
according to recommendations in Figure 2.10. A vertically
terminated 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 2.8.
40
39
38
37
All Vertical
36
Terminations in this
35
area Require use
34
of the Restrictor
33
Plate*
32
31
30
29
28
27
Vertical terminations
26
must be within this
25
area
24
23
22
21
20
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
**
3
2
1
0
1 2 3 4 5
Horizontal Run (in feet)
**No Restrictor Plate
Figure 2.8 - Vertical vent termination window.
99
Unacceptable
Venting Configuration
6 7 8 9 10 11 12 13 14 15 16 17 18 19
Vermont Castings • Radiance RADVT Installation Manual_R4 • 04/19
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 loosening the
adjustment screw to allow the restrictor plate to slide up or
down. (Figure 2.9) A guide for usage is shown in Figure 2.10.
NOTE: Some installations may require some adjustment by
the installer for optimum flame appearance. Optimum flame
appearance is a flame that is not subject to tall, dirty yellow
flames producing soot or flames lifting off of the ember bed
ports.
Restrictor Plate Adjustment
• Remove the screw in the back wall of the firebox.
• Install restrictor plate as shown in Figure 2.9 with cut out
on left side. Secure with adjustment screw.
• Measure from center of screw to top edge of diverter
(Figure 2.9) to adjust plate according to guidelines in
Figure 2.10.
• Tighten attachment screw.
• Install logs following log installation instructions.
Adjustment Screw
ST132a
FDV28
Vertical
vent run
12/3/99 djt
Figure 2.9 - Loosen screw to adjust restrictor plate.
Examples for Extended Run/Restrictor Plate Settings
Vertical 20'
(6 m), 90° (3.4 m), 90°
elbow, out 8' elbow, out 2'
(2.4 m)
Restrictor plate measurement from top of plate to
center of screw:
20 2 ⁄ " (70 mm)
3
4
from center to top of slot
of screw to
top edge of
plate
Figure 2.10
ST917
Vertical 11' Vertical 40'
(12 m)
restrictor plate
(610 mm)
6/07
Plate down Plate down
to top of slot
Vertical 5'
(1.5 m), 90°
elbow, out 5'
(1.5 m)
2 ⁄ " (60 mm)
3
8
from center
of screw to
top edge of
plate
3-90-30007498