Gas Specifications; Gas Inlet And Manifold Pressures; High Elevations; Horizontal Termination - Vermont Castings Radiance RADVTCB Homeowner's Installation And Operating Manual

Radiance Direct Vent Gas Heater
Gas Specifications
Model Fuel
RADVT Series Nat
RADVT Series Prop
RADVTC Series Nat
RADVTC Series Prop Comfort Control 36,000 25,000
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,
alteration, service or maintenance can cause in-
jury 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.
88
Max.
Input Input
Gas Control BTU/h BTU/h
Millivolt 38,000 25,000
Millivolt 36,000 25,000
Comfort Control 38,000 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.
Min.
The vent must rise vertically a minimum of 24" (610mm)
off the top of the unit, before the first elbow. The hori-
zontal run may extend up to 20' (6m) and include a
vertical rise of up to 40' (12m). (Fig. 7) Horizontal termi-
nation must also meet the criteria shown in Figures 10
through 12.
• 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˚ elbows
may be used.
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Fig. 7 Horizontal vent termination window.

Horizontal Termination

May use up to
three 90° Elbows
No Restrictor Plate
Required
Elbow
Unacceptable
Venting Configuration
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Horizontal Run (in feet)
ST134b
Radiance
Horizontal
vent run
6/07
ST134a
20012697