Gas Specifications; Gas Inlet And Manifold Pressures; High Elevations; Horizontal Termination - Vermont Castings RADVT(CS)CBSB Installation And Operating Instructions Manual

Radiance Direct Vent Gas Heater
®

Gas Specifications

Model Fuel Gas Control BTU/h BTU/h
RADVT Series Nat Millivolt Manual 38,000 25,000
RADVT Series Prop Millivolt Manual 36,000 25,000
RADVTCS Series Nat
RADVTCS Series Prop
Weight: Fully assembled; 350 lbs.

Gas Inlet and Manifold Pressures

Inlet Minimum
Inlet Maximum
Manifold Pressure
The installation of your Vermont Castings stove 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, or CSA B149.1 Installation code.
(EXCEPTION: Do not derate this appliance for altitude up
to 2,000 (610 m) for natural gas and 4,500 feet (1,370
m) for LP Gas. Maintain the manifold pressure at 3.5"
w.c. for Natural Gas and 10.0" w.c. for LP Gas.

High Elevations

Input ratings are shown in BTU per hour and are
certified without deration for elevations up to 2,000
feet (610 m) for natural gas and 4,500 feet (1,370 m)
for LP gas above sea level.
In the USA installations with elevations above 2,000
feet (610 m) for natural gas and 4,500 feet (1,370 m)
for LP gas 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 2,000 feet (610 m) for natual gas
and 4,500 feet (1,370 m) for LP gas.
WARNING: Improper installation, adjustment, al-
teration, service or maintenance can cause injury
or property damage. Refer to this manual for correct
installation and operational procedures. For assis-
tance or additional information consult a qualified
installer, service agency, or the gas supplier.
88
Max. Min.
Input Input
Millivolt Hi/Lo 38,000 25,000
Millivolt Hi/Lo 36,000 25,000
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.

Horizontal Termination

The vent must rise vertically a minimum of 24" (610 mm)
off the top of the unit, before the first elbow. The horizontal
run may extend up to 20' (6m) and include a vertical rise of
up to 40' (12 m). (Fig. 7) Horizontal termination must also
meet the criteria shown in Figures 10 through 12.
• Approved vent systems must terminate above and includ-
ing 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° elbows
may be used.
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
No Restrictor Plate
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 3 4 5 6 7
Horizontal Run (in feet)
Fig. 7 Horizontal vent termination window.
May use up to
three 90° Elbows
Required
Unacceptable
Venting Configuration
8 9 10 11 12 13 14 15 16 17 18 19 20
20306759
ST134b
Radiance
Horizontal
vent run
6/07
ST134a