Gas Specifications; Gas Inlet And Manifold Pressures; High Elevations; Horizontal Termination - Vermont Castings SDDVRBD, SDDVRC, SDDVRCCB Installation And Operating Manual

Stardance Direct Vent - Rear Vent Gas Heaters
Gas Specifications
Model Fuel
SDDVR Series Nat
SDDVR Series Prop
SDDVRC Series Nat
SDDVRC Series Prop Comfort Control 21,000 16,000
Air Shutter Setting
Minimum rear injector air inlet openings.
Model
SDDVR/SDDVRC
Weight: Fully assembled 350 lbs.

Gas Inlet and Manifold Pressures

Inlet Minimum
Inlet Maximum
Manifold Pressure
The installation must conform with local codes or, in
the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 - latest edition. (EXCEP-
TION: Do not derate this appliance for altitude. Main-
tain the manifold pressure at 3.5" w.c. for Natural Gas
and 10" w.c. for Propane.)

High Elevations

Input ratings are shown in BTU per hour and are
certified without deration for elevations up to
4,500 feet (1,370m) above sea level.
For elevations above 4,500 feet (1,370m) in USA,
installations must be in accordance with the
current ANSI Z223.1/NFPA 54 and/or local codes
having jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at
elevations above 4,500 feet (1,370m).
WARNING: Improper installation, adjust-
ment, alteration, service or maintenance
can cause injury or property damage. Refer
to this manual for correct installation and
operational procedures. For assistance or
additional information consult a qualified
installer, service agency, or the gas supplier.
8
Max.
Input Input
Gas Control BTU/h BTU/h
Millivolt 21,000 15,000
Millivolt 21,000 16,000
Comfort Control 21,000 15,000
Natural Gas LP
1/2" Open 1/2" Open
Natural LP (Propane)
5.5" w.c. 11.0" w.c.
14.0" w.c. 14.0" w.c.
3.5" w.c. 10" w.c.
Min.
The vent must rise vertically a minimum of 24" (610mm)
after the first elbow directly off the back of the unit,
before the next elbow. The horizontal run may extend
up to 20' (6m) and include a vertical rise of up to 40'
(12m). (Fig. 7) Horizontal termination must also meet
the criteria shown in Figures 9 and 10.
• Approved vent systems must terminate above and
including the heavy line in Figure 7.
• Two 45° elbows may be substituted for each single
90˚ elbow.
• With a rise between 2' - 5', one 90° or two 45° el-
bows may be used (Excluding the first elbow directly
off the back of the unit.
30
29
28
27
26
25
24
23
22
21
20
19
18
16
15
14
13
12
11
10
9
8
7
6
5
One 90°
4
Elbow*
3
2
1
0
1 2
Fig. 7 Horizontal vent termination window.
* Not the transition elbow.

Horizontal Termination

Unacceptable
Venting Configuration
May use up to
three 90° Elbows
(Excluding elbow
directly off back
of unit.)
Unacceptable
Venting Configuration
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Horizontal Run (in feet)
ST134a
FDV28
Horizontal
vent run
12/3/99 djt
areas modified
1/11/00 djt
ST134f
20012950