Vermont Casting SDDVT Stardance Direct Vent/Natural Vent Gas Heater, Pilot Orifice Conversion

Models: SDDVT

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Pilot Orifice Conversion

Stardance Direct Vent/Natural Vent Gas Heater

3.Remove motor top cap using a standard slotted screwdriver. Depress and turn center plunger until arrow points to correct screw. Red for LP and Blue for NG. NOTE: Plunger will “snap” into NG position when arrow is close to blue screw. It will not “snap” at LP (Red) position. (Fig. 65)

 

 

Motor Top Cap

Center

 

 

Plunger

 

 

 

 

Valve

Blue - NG

Red - LP

LOCAL

 

FP1037b

 

 

Fig. 65 Depress and turn center plunger.

4.Insure manifold pressure remains between 3.2” - 3.5” w.c. for NG and 9.5” - 10” w.c. for LP. To adjust the manifold pressure, for NG, using a Torx #10 key turn the blue screw clockwise to increase the manifold pressure. Turn the screw counterclockwise to de- crease the pressure. Use the red screw to adjust LP.

5.Replace motor top cap.

Pilot Orifice Conversion

1. Locate pilot. (Fig. 66)

ST935

Fig. 66 Pilot assembly location.

2.Replace pilot orifice.

Pilot Type 1

Remove pilot hood by lifting up. (Fig. 67) Do not remove snap ring to remove pilot hood. NOTE: It is not necessary to remove the pilot tube for conver- sion.

Remove pilot orifice with Allen wrench. (Fig. 68)

Install the conversion orifice.

 

Pilot Hood

Pilot

Bracket

 

CO105a

Fig. 67

Remove pilot hood.

38

 

Index Tab

Allen Wrench

Snap Ring

CO106a

Fig. 68 Remove pilot orifice.

Reinstall pilot hood. Be sure to align hood with index tab.

Pilot type 2

Loosen pilot hood turning counterclockwise using a 7/16” wrench. (Fig. 69) NOTE: You may use pen- etrating oil to prevent pilot hood threads from seizing up.

Remove pilot orifice with needlenose pliers. (Fig. 70) NOTE: Use a wrench to hold pilot tube in place while removing the orifice.

Install the conversion orifice.

Reinstall pilot hood and tighten until mark on pilot hood aligns with mark on pilot bracket.

Pilot

Index

Marks

Pilot Bracket

CO143

Fig. 69 Remove pilot hood. (Your pilot may have a different appearance.)

Pilot Orfice

CO144

Fig. 70 Remove pilot orifice.

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Vermont Casting SDDVT manual Stardance Direct Vent/Natural Vent Gas Heater, Pilot Orifice Conversion, Pilot Type, Pilot type