AAON BL-600 - Manual (Page 38)

38
Unlocking:
1. Open the interconnecting valve on the
seal flush line to pressurize the serviced
pump and vent air through bleeder valve
on series 4302. Close these valves once
the pressure is equalized and air
removed.
2. Loosen set screw (11) and lower locking
handle (3) to the horizontal position,
secure with set screw (11).
NOTE: Keep hands and tools away from
suction valve locking arm when freed by
locking handle as differential pressure may
cause arm to rotate quickly with force when
unlocked.
3. Rotate valve to center position so that
the center pin of the locking arm (4) is
located in the recess on the locking
handle (3).
4. Loosen set screw (11) and raise locking
arm (3) to the vertical position, locking
the center pin in the locking arm recess,
secure with set screw.
Care should be taken when
performing procedures 3 and 4. Read
instructions carefully.
WARNING