Vermont Casting DV580 manual Using a 1/2 open end wrench remove the orifices. Fig

DV360/580 Series Direct Vent Gas Fireplace

3.Using a 1/2” open end wrench remove the orifices. (Fig. 67)

Front Burner Orifice (Refer to Table on Page 42)

Rear Burner Orifice (Refer to Table on Page 42)

CO130

Fig. 67 Burner orifice replacement.

4.Converting LP to NG, remove bracket/gasket as- sembly by unfastening the screw which secures the bracket to the burner tray base. Discard bracket and refasten the screw into the hole. (Fig. 67a)

Converting NG to LP, assemble the bracket/gas- ket assembly to the burner tray assembly base by unfastening the screw on the tray to the right side of the orifice. Slide the bracket/gasket assembly over the fitting on the manifold toward the back with the gasket to the right. Secure the bracket/gasket as- sembly using the screw removed earlier. (Fig. 67a)

LP Bracket/Gas- ket Assembly - in place for use with LP Gas; remove for use with Natu- ral Gas

Screw

CO132

Fig. 67a LP bracket/gasket assembly.

5.Replace the orifices according to the table on Page 42.

6.Replace the mixing tube on the burner housing by removing the two (2) screws that secure the mixing tube to the burner housing assembly. Remove the old gasket behind the mixing tube. (Fig. 68) NOTE:

The mixing tube for propane gas has only two bimetallic springs that are in the closed position at cold start. The mixing tube for natural gas has two spring/shutter collar assemblies that are in the closed position at cold start. Make sure the correct mixing tube is used for conversion.

7.Use the new gasket supplied in the conversion kit and proper mixing tube and replace in reverse order.

Gasket

Burner Housing

Mixing Tube

Natural

Propane

CO131

Fig. 68 Replace mixing tube and gasket.

8.Reassemble the burner housing assembly, the burner tube assembly and the fettle in reverse order.

DV580

1.Remove manifold mounting screw from burner. (Fig. 69)

2.Remove burner orifice from manifold assembly using 3/8” wrench. (Fig. 70)

3.Install conversion orifices in place of orifices just removed.

	Manifold Assembly	Pilot Location
	Burner Pan
	Manifold Mounting
	Screw
Orifice	Log Support
	(DV580)	CO101a
Fig. 69 Remove manifold assembly.
Rear Burner Orifice:
(Refer to Conversion Kit Orifice
Chart)
	Front Burner Orifice:
	(Refer to Conversion Kit
	Orifice Chart)
		CO102a

Fig. 70 Burner orifice replacement.

4.Remove air shutters from burner pan by removing shutter retaining screw then air shutter. (Fig. 71)

5.Replace only the rear air shutters.

Natural Gas: Rear air shutter, fully open.

	Front air shutter, fully open.
LP:	Rear air shutter, fully open.
	Front air shutter, fully open.

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