Unfortunatelly each of four fuel transfer valves (two per side, so you can find next two C/B on panel VU 122 if I remeber location correctly) needs el. power for opening or closing. Valve itself is driven by electrical motor, which turns with valve via gearbox every time one quart of turn still in one direction to change from open to close and vice versa. It means there is no "fail safe" positon. But yes, on ground, you can open transfer valves by reseting C/Bs, as described in procedure for MEL (you can find it in AMM), if system is at least partialy powered. Don't know if such procedure is in QRH/FCOM for inflight use.
Last edited by LEVEL600; 20th Jul 2015 at 21:00.