REV. 4-6-2010
Page 5 of 11
Installation of AF-4000 Control
1. Mount control 0 to 90 degrees in any direction, from the upright position
of the gas control knob, including vertically.
2. Mount the control so gas flow is in the direction of the arrow on the side
Figure #2
or back of the control.
3. Thread pipe 9/16 in. into the control. Do not inset deeper than 3/8 in. Valve
distortion or malfunction can result if the pipe is inserted too deeply.
4. Apply a moderate amount of good quality pipe compound to pipe only,
leaving two (2) end threads bare. On LP installations, use compound resistant
to LP gas. See Figure #2
5. Remove plastic dust seals over the control Inlet and Outlet if necessary.
6. Connect pipe to control Inlet and Outlet. Use wrench on either side of the
pipe outlet. See Figure #3
Figure #3
Converting the AF-4000 Natural to Propane
The AF-4000 electronic control valve is convertable from natural gas to propane gas by a Simple Rotary knob located on
the front (Face) of the valve. Note: Figure #4
1. Unscrew and remove the cover cap. Note: the position of the marker on the shaft of the Simple Rotary knob. This
mark will point to NAT or LP that indicates the type of gas the valve is set on.
2. To convert the AF-4000 from the factory setting (NAT) push in the Simple Rotary knob and rotate 90º. Note: the
marker will now point to LP and the shaft will stay in.
3. To convert the AF-4000 back to the factory setting (NAT) push in the Simple Rotary knob and rotate 90º. Note: the
marker will now point to NAT and the shaft will stay out.
4. After the conversion has been made check the out let pressure with a manometer. The factory setting on the internal
regulator is 3.50”wc natural and 10.5”wc propane.
5. Replace the cover cap.
Use extreme caution when changing this Simple Rotary knob
Figure #4
Spark to Pilot Burner Connections
This gas control uses a spark to pilot burner assembly. The pilot gas connections are as follows:
1. Select the pilot outlet on the AF-4000 valve to be used (Side or back) connection. If the side connection is used, the
plug will need to be moved to the back pilot conection. After the plug has been installed check for leaks with rich soap
and water solution.
f i r e - p a r t s . c o m
