HEADER TANK AUTOMATIC FILL CONTROLLER

Operation

Two Sensor Operation (fully automatic)

• When low fuel is detected in the header fuel tank by the lowest sensor, the HTAF2 will pump fuel into the header tank until the highest sensor detects a full level. It will then, quit pumping.

One Sensor Operation (automatic start, with a timed stop)

• When low fuel is detected in the header fuel tank by the lowest sensor, the HTAF2 will pump fuel into the header tank for a customer specified time period (0 to 10 minutes). It will then, quit pumping.

No Sensor Operation (pilot initiated manual start, with a timed stop)

• The HTAF2 is normally used with very reliable optical fuel level sensors mounted in the header tank. If the user is not able to install any fuel level sensors in the header fuel tank, the HTAF2 can be set up so the pilot may manually activate the HTAF2. It will then pump for a customer specified time (0 to 10 minutes), then quit.

The HTAF2 also has two relay outputs that can be used for a remote or pilot light indications. One output is a low fuel indication. The low fuel relay output is damped so that it does not falsely indicate low fuel in the case of sloshing fuel. This relay output is also used to indicate system errors if connected to an indicator light, it flashes the light with different timing to indicate what failure occurred. The other output is triggered when the fuel pump is active.