Vermont Casting SDDVRVG Gas Specifications, Gas Inlet and Manifold Pressures, High Elevations

Stardance Direct Vent - Rear Vent Gas Heaters

Gas Specifications

			Max.	Min.
			Input	Input
Model	Fuel	Gas Control	BTU/h	BTU/h
SDDVR Series	Nat	Millivolt	21,000	15,000
SDDVR Series	Prop	Millivolt	21,000	16,000
SDDVRC Series	Nat	Comfort Control	21,000	15,000
SDDVRC Series	Prop	Comfort Control	21,000	16,000

Air Shutter Setting

Minimum rear injector air inlet openings.

Model	Natural Gas	LP
SDDVR/SDDVRC	1/2” Open	1/2” Open
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 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. (EXCEP- TION: Do not derate this appliance for altitude. Main- tain 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 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

The vent must rise vertically a minimum of 24” (610mm) after the first elbow directly off the back of the unit, before the next elbow. The horizontal run may extend up to 20’ (6m) and include a vertical rise of up to 40’ (12m). (Fig. 7) Horizontal termination must also meet the criteria shown in Figures 9 and 10.

•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° el- bows may be used (Excluding the first elbow directly off the back of the unit.

	30
	29
	28
	27											Unacceptable
	26									Venting Configuration
	25
	24
elbow)	23
	22
	21
Vertical Run (in feet) Measured after the first elbow. (Transition
	20
	19
	18
	16
	15		May use up to
	14		three 90° Elbows
			(Excluding elbow
	13
			directly off back
	12			of unit.)
	11
	10
	9
	8
	7
	6
	5
	4	One 90°
	3	Elbow*										Unacceptable
	2										Venting Configuration
	1
	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) ST134f

Fig. 7 Horizontal vent termination window.

* Not the transition elbow.

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