CFM Corporation DVT38IN - Manual (Page 39)

39
Chateau™
20011956
10. Install the conversion orifice.
11. Reinstall pilot hood. Be sure to align hood with
index tab.
Converting the Gas Control Valve
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.
57)
CO134
AF pilot orifice
3/07
Index Tab
Allen Wrench
Snap Ring
CO134
Fig. 56 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.
CAUTION: Turn off the gas supply before
removing test port plug.
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.
CAUTION: Turn off the valve and gas sup-
ply before removing test port adaptor and
replacing plug.
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 27 to reinstall
logs, lava rock, volcanic rock and embers.
19. Replace glass frame.
�����
�����������������������
����
�
��
�
��
��
��
Gas Type
Marker
Minimum Rate
Screw
CO137
Fig. 57 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. 57)