Vermont Castings Jefferson Direct Vent/Natural Vent Gas Heater
Gas Specifications
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Model | Fuel | Gas Control | BTU/h | BTU/h | |||
JDVRN | Nat |
| Millivolt | 28,000 | 20,000 |
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JDVRP | Prop |
| Millivolt | 28,000 | 19,000 |
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Weight: Fully assembled; 350 lbs. |
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Gas Inlet and Manifold Pressures | |||||||
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| Natural |
| LP (Propane) |
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Inlet Minimum |
| 5.5Ó w.c. |
| 11.0Ó w.c. |
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Inlet Maximum |
| 14.0Ó w.c. |
| 14.0Ó w.c. |
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Manifold Pressure |
| 3.5Ó w.c. |
| 10.0Ó w.c. |
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Horizontal Termination -
Direct Vent ONLY
The vent must rise vertically a minimum of 24Ó (610mm) off the top of the unit, before the first elbow. The horizon- tal run may extend up to 20Õ (6m) and include a vertical rise of up to 40Õ (12m). (Fig. 7) Horizontal termination 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 45û elbows may be substituted for each single 90û elbow.
•With a rise between 2' - 6', one 90û or two 45û elbows may be used.
Jefferson Direct Vent/Natural Vent
Certified to:
ANSI Z21.88b-2001 / CSA 2.33b-2001
Vented Gas Fireplace Heaters
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 - latest edition, or CSA B149.1 Installation code. (EXCEPTION: Do not derate this appliance for altitude up to 4,500 feet (1,370m). Maintain the manifold pressure at 3.5Ó w.c. for Natural Gas and 10.0Ó 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 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
Vertical Run (in feet) (Measured from the appliance flue collar to the top of the vent pipe.)
40
39
38
37
36
35
34
33
32
31
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
4
3
2
1
0
May use up to
three 90° Elbows
One 90°
Elbow
Unacceptable
Venting Configuration
this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
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| Horizontal Run (in feet) |
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| ST134a | |||||||||
Fig. 7 Horizontal vent termination window.
20002191 | 7 |
