Century Jefferson manual Gas Specifications, Gas Inlet and Manifold Pressures, High Elevations

Jefferson Direct Vent/Natural Vent Gas Heater

	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.
Gas Inlet and Manifold Pressures
		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.

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.

	40
	39
	38
	37
	36
	35
	34
	33
pipe.)	32
	31
vent	30
	29
the	28
of
	27
RunVertical(in feet) flueappliancecollar to the top										May			use		up to
	19
	26
	25								three 90°						Elbows
	24
	23
	22
	21
the	20
	18
from	16
(Measured	15
	14
	13
	12
	11
	10
	9
	8
	7
	6
	5
	4
	3
			One		90°
	2		Elbow														Unacceptable
	1
															Venting Configuration
	0
	1	2	3	4		5	6	7	8		9	10		11		12		13	14	15	16	17	18	19	20

Horizontal Run (in feet)

ST134a

Fig. 7 Horizontal vent termination window.

88 30004177