Vermont Casting 3360, 3399 Radiance Direct Vent /Natural Vent Gas Heater, SIT 820 Valve, 20004188

Cap

H	Lift Open	HI
I
LO		LO
Hi-Lo
Knob	Center Screw	CO100

Fig. 55 Remove center screw from Hi-Lo knob.

3.Insert blue painted screw when converting to natural gas and red painted screw when converting to LP.

4.Tighten screw (do not over tighten), replace cap.

SIT 820 Valve

1.Using TORX T20 bit, remove and discard the three

(3) pressure regulator mounting screws (A), pressure regulator tower (B) and the spring and diaphragm assembly (C). (Fig. 56)

A

B

C

	OFF
	P
		I
O	TO	L

FC107

Fig. 56 Remove mounting screws, pressure regulator tower and spring and diaphragm assembly.

2.Insure the rubber gasket (D) is properly positioned and install the new HI/LO pressure regulator assem- bly to the valve using the new screws (E) supplied with the kit. Tighten the screws securely. (Ref. torque = 25 in/lb) (Fig. 57)

3.Install the enclosed conversion label (F) to the valve body where it can easily be seen. (Fig. 57)

Pilot Orifice Conversion

1.Locate pilot. (Fig. 53)

2.Replace pilot orifice.

Pilot Type 1 (SIT Pilot)

•Remove pilot hood by lifting up. (Fig. 58) Do not remove the snap ring to remove the pilot hood. NOTE: It is not necessary to remove the pilot tube for conversion.

•Remove pilot orifice with allen wrench. (Fig. 59)

Radiance Direct Vent /Natural Vent Gas Heater

E

OFF

P

I

O TOL

D

	F
	FC108
Fig. 57	Replace regulator.
	Pilot Hood
Pilot
Bracket
	CO105a

Fig. 58 Remove pilot hood.

Index Tab	Allen Wrench
Snap Ring
CO106a

Fig. 57 Remove pilot orifice.

•Install the conversion orifice.

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

Pilot type 2 (Honeywell Pilot)

•Loosen pilot hood turning counterclockwise using a 7/16” wrench. (Fig. 60) NOTE: You may use pen- etrating oil to prevent pilot hood threads from seizing up.

•Remove pilot orifice with needlenose pliers. (Fig.

61)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.

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