Century Jefferson - Manual (Page 8)

8 8
Jefferson Direct Vent/Natural Vent Gas Heater
30004177
Gas Specifications
Max. Min.
Input Input
Model Fuel Gas Control BTU/h BTU/h
JDVBRN Nat Millivolt 28,000 20,000
JDVBRP Prop Millivolt 28,000 19,000
Weight: Fully assembled; 350 lbs.
Natural LP (Propane)
Inlet Minimum 5.5” w.c. 11.0” w.c.
Inlet Maximum 14.0” w.c. 14.0” w.c.
Manifold Pressure 3.5” w.c. 10” w.c.
Gas Inlet and Manifold Pressures
The installation of your CFM Corporation stove must
conform with local codes, or in the absence of lo-
cal 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 4,500 feet (1,370 m).
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
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.
Horizontal Termination -
Direct Vent ONLY
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’ (6 m) and include a
vertical rise of up to 40’ (12 m). (Fig. 7) Horizontal ter-
mination must also meet the criteria shown in Figures 9
through 11.
• 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’ - 6’, one 90˚ or two 45˚ elbows
may be used.
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 8 9 10 11 12 13 14 15 16 17 18 19 20
Vertical Run (in feet)
(Measured from the appliance flue collar to the top of the ven
t pipe.)
Horizontal Run (in feet)
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
ST134a
FDV28
Horizontal
vent run
12/3/99 djt
areas modified
1/11/00 djt
ST134a
Fig. 7 Horizontal vent termination window.
May use up to
three 90° Elbows
One 90°
Elbow
Unacceptable
Venting Configuration