PCFS Installation



Cline and Associates Customer's Fly With an Attitude!	About Us	How To Order	FAQ	Site Index

[ Home ] [ Up ] [ PCFS Installation ] [ PCFS Details ]

Proportional Control Fuel System Installation & Operation

Home
Fuel System
Pricing & Shipping Info
Contact Us
Links

Check Valve

Kits prior to 10-18-05

Because of the various possible installations, there is no mounting hardware supplied.

Please note that the controller requires 2 to 12 PSI to operate and this is supplied by either a Pressure Tap on the crankcase of a two cycle engine or the muffler pressure of a four-cycle engine.

While installing the controller, keep in mind that it must be very close to the carburetor (3/4 to 1inch). You can put a piece of rubber around it to keep it from rubbing on the engine. You can support the fuel line to the controller. A good fuel filter should be placed in the fuel line as close to the controller as possible (on the inlet side).

The controller does not have to be soft mounted but it would be better if it can is (IN NO CASE SHOULD IT BE ATTACHED DIRECTLY TO THE ENGINE).

Next review the installation diagram for the combination of engines and tanks you are using. (See links on the right.)

Insert the special high frequency Check Valve in the pressure line as close to the Pressure Tap as possible. Make sure the check valve is oriented in the correct direction so as to trap pressure in the tank (small brass end [inlet] towards engine).

The tank can be placed anywhere in the airplane, but preferably near or on the center of gravity.

There are two(2) Elbows, two(2) Tees, and two(2) Plugs) furnished with each controller.

The two elbows have a locking taper in them that fit the inlet and outlet of the controller so that the fuel lines can be angled in from any direction. Press the elbows on the controller firmly and put a thin drop of C/A about their base to secure them to the controller. You can move them by twisting them.

One tee should be placed in the line between the check valve and the vent on the fuel tank; the other tee should be placed in the fuel line between the filter and the fuel tank. (This line goes to the clunk.) Add a piece of tubing to each Tee and extend them outside the airframe in a convenient place to fuel and de-fuel the tank. Identify each line as to where it goes (fill or overflow) and close them with the plugs provided.

Now connect the controller outlet (marked OUT) to the carburetor.

That's It! Your ready to run. See Operation Instructions at the right on this page.

If you have problems check out the FAQ page or contact us for help.

Schematic Diagrams

One Tank - One Engine

One Tank - Two Engines

Two Tanks - One Engine

Operation

Filling the Fuel Tank:
Remember, when refueling the tank, you should always unplug the overflow first so as to relieve pressure in the tank.

Remove the plugs and pump fuel into the line you identified as fill until fuel comes out the line identified as overflow. No fuel can get into the engine at this time. When full, plug both lines.

Starting Engine:
Choke the engine before starting to draw fuel into the carburetor. When the engine starts, you may
have to momentarily keep it choked until the tank gets pressurized.

When adjusting the mixture, you will find that the needle will not be as sensitive as it was without the PCFS system installed. This is normal. You will find that the mixture will stay where you set it all through the run, from full to empty.

TRANSPORTING & STORING:
After running the engine, you should relieve the pressure in the tank and then plug the overflow for
transporting or storing the airplane. Doing this will insure no fuel will drip out.