Gas Specifications; Air Shutter Setting; Gas Inlet And Manifold Pressures; High Elevations - Vermont Castings Intrepid INDVRCB Homeowner's Installation And Operating Manual

Intrepid® Direct Vent - Rear Vent Gas Heater

Gas Specifications

Model Fuel
INDVR Series Nat
INDVR Series Prop

Air Shutter Setting

Minimum injector air inlet opening
Model Natural Gas
INDVR
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. (EXCEPTION:
Do not derate this appliance for altitude. Maintain 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 cur-
rent 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, adjustment,
alteration, service or maintenance can cause
injury or property damage. Refer to this manual
for correct installation and operational proce-
dures. 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 18,500 12,500
Millivolt 16,000 12,000
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.
Except for straight-through the wall vent installations.
The vent must rise vertically a minimum of 24" (610 mm)
after the first elbow directly off the back of the unit, before
the next elbow. The horizontal run may extend up to 20' (6
m) and include a vertical rise of up to 40' (12 m). (Fig. 7)
Horizontal termination must also meet the criteria shown
in Figures 11 and 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 (Excluding the first elbow directly off the
back of the unit.
directly off back of
Two 90°
Elbows
Fig. 7 Horizontal vent termination window.

Horizontal Termination

Unacceptable
Venting Configuration
May use up to
four 90° Elbows
(Including elbow
unit.)
Unacceptable
Venting Configuration
Horizontal Run (in feet)
ST134a
FDV28
Horizontal
vent run
12/3/99 djt
areas modified
1/11/00 djt
ST134f
20012761