Vertical Termination; Restrictor Plate Adjustment For Extended Pipe Runs - Vermont Castings RADVT(CS)CBSB Installation And Operating Instructions Manual

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 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 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 11.
40
39
38
All Vertical Ter-
37
36
minations in this
35
area Require use
34
33 of the Restrictor
32
Plate*
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 6 7
**No Restrictor
Horizontal Run (in feet)
Plate
Fig. 8 Vertical vent termination window.
20306759
Unacceptable
Venting Configuration
8 9 10 11 12 13 14 15 16 17 18 19
Restrictor Plate Adjustment
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. (Fig. 9) A guide for usage is shown in Figure 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
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 Fig-
ure 10.
3. Tighten attachment screw.
4. Install logs following log installation instructions.
Adjustment Screw
ST132a
FDV28
Vertical
vent run
12/3/99 djt
Fig. 9 Loosen screw to adjust restrictor plate.
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. 2 ⁄ " (70 mm) from center of screw to top edge of plate
3
4
2. Plate down to top of slot
20
3. Plate down to top of slot
ST132a
4. 2 ⁄ " (60 mm) from center of screw to top edge of plate
3
8
Figure 10
Radiance Direct Vent Gas Heater
®
for Extended Pipe Runs
ST917
restrictor plate
6/07
ST917
9