Vermont Casting DVT38IN 사용자 설명서

40

10.  Install the conversion orifice.
11.   Reinstall pilot hood. Be sure to align hood with 

index tab.

The AF4000 electronic control valve is convertible from 
natural gas to propane gas by changing the minimum 
rate screw in the valve and by rotating a plastic knob 
located under a black cap on the top face of the valve.
1.  Refer to Control System Installation section on Page 

8 for instructions to gain access to the electronic 
control valve.

2.  Remove the black cap by pulling the cap straight 

off. Note the position of the marker on the top of the 
rotary knob. This marker will point to NAT or LP. (Fig. 
58)

CO134

AF pilot orifice

3/07

Index Tab

Allen Wrench

Snap Ring

CO134

Fig. 57  Remove pilot orifice.

5.  Replace the minimum rate screw with the one 

provided in the LP conversion kit supplied with this 
fireplace. Ensure the screw is fully installed.

6.  After the conversion has been made, check the 

manifold outlet pressure with a manometer at the 
test ports located at the right side front edge of the 
fireplace opening. The lower test port is manifold 
outlet pressure.

Check Manifold Pressure
7.  Using a 7/16” nut driver, remove the threaded plug 

from the test port.

8.  Thread the supplied brass extension adaptor fully 

into the open test port.

9.  Attach a 1/4” diameter pressure gauge flexible hose 

fully onto the barb of the adaptor.

10.  Turn on gas supply and operate valve with remote 

control as needed to indicate gas pressure. The 
manifold pressure for LP should be 10” wcp. The 
manifold pressure for NG should be 3.5” wcp.

11.   After test, remove adaptor and replace plug.
12 . Turn on gas supply and check that plugs are tight 

and leak free.

13.  Install the enclosed identification label to the valve 

body where it can easily be seen.

14.  Test for Leaks

• 

Apply gas to the system and light the pilot.

• 

With a soapy solution check for leaks around the 
pilot assembly where the tube enters the pilot as-
sembly. Tighten fitting if necessary.

• 

With the main burner “ON” check for leaks 
around the burner orifice. Be careful of the 
burner flame. Tighten orifice if necessary.

15.  Replace burner to original position.
16.  Replace burner leg.
17.  Replace burner tube and fettle. 
18.  Follow instructions starting on Page 28 to reinstall 

logs, lava rock, volcanic rock and embers.

19.  Replace glass frame.

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Gas Type 
Marker

Minimum Rate 
Screw

CO137

Fig. 58  Remove black plastic cap and adjust rotary knob to 
correct gas type. (LP position shown) Replace minimum rate 
screw with one supplied in coversion kit.

3.  To convert the valve from NG to LP, push in the knob 

and rotate 90° (1/4 turn). NOTE: The shaft should 
point to LP and the shaft will remain pushed in.

4.  Remove the minimum rate screw, using a small 

screwdriver, located in the valve next to the motor 
drive. (Fig. 58)