Gas Flow Theory of Operation
1 - 24 046-006272-00 A7™ Service Manual
FIGURE 1-18
1.3.4.6 Three-way Valve
The three-way valve is a two-position three-way solenoid valve with two inlets and one outlet. The
two inlets are connected to the outputs of the EFCS and BFCS respectively, whereas the outlet is
connected to the total flow meter. The three-way valve implements pneumatic circuit switching
between the EFCS and BFCS. Upon power-on, the EFCS limb is switched on and the BFCS limb is
switched off; upon power-off, the EFCS limb is switched off and the BFCS limb is switched on. The
following figure shows the position of the three-way valve in the system.
FIGURE 1-19
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