Section 1: Introduction
Valve System
2016 Bambi MAX Service Manual
–
Models 4453-7590
(Version D)
4
We Engineer Solutions
Valve position feedback to the controller is provided by a sensor cam and two sensors. The sensor cam is
located on the front of the cable drum and rotates with the motor and cable drum. The sensors are located
in the controller enclosure. As the sensor cam rotates, a cut-out in its face actuates the sensors, signalling
to the valve controller if the valve is closed, open, or somewhere in between. The sensors are a proximity
type and are not affected by any non-metallic contamination of the water.
When the controller receives the open signal from the aircraft, the valve motor rotates clockwise and opens
the valve. When the open sensor is triggered by the cam, the motor turns off and the valve remains in the
open position as long as the open signal is present.
When the operator releases the push button, the open signal is
removed. The motor rotates clockwise and closes the valve.
When the closed sensor is triggered by the cam, the motor
turns off and the tube remains in the closed position.
The sensor cam can rotated on the drum to adjust the valve
position. Rotating the cam clockwise will lower the valve;
counter-clockwise will raise the valve. See
Section 4:
Making Adjustments.
There is a status indicator lamp on the side of the control
enclosure which indicates where the controller thinks the
valve is.
Indicator
Status
White (Off)
No Power
Yellow
Valve Closed
Flashing Green Valve Partially Open
Green
Valve Open
Red
Sensor Fault
