August 2016
Installation and Operation Manual
Part Number: VA001-507-32, Rev. 1
38
Section 5: Operation
Operation
5.4.2.3 ESD Operation ((Optional))
In an ESD application the ESD Solenoid (P) is constantly energized closed. This
customer supplied signal is held as long as the signal is present. Upon loss of
the signal to the ESD solenoid, the solenoid will de-energize and open allowing
hydraulic supply fluid from the accumulator (E) to pass thru the ESD solenoid
and to the closing port of the actuator (W).
5.4.2.4 Manual Hand Pump Stroke
1. Open the Hand Pump Selection Isolation Valve (M) to the pump position.
NOTE:
Both Hand Pump Selection Isolation Valves (M) must be engaged whether hand
pumping open or close.
2. Select and push the open or close knob on the Hand Pump (L).
3. Stroke the hand pump until the OPEN/CLOSE stroke is completed.
4. Push the manual relief valve located on the hand pump to retract the pump
ram back into the pump body and pull the pump handle down.
5. Upon completion of the OPEN/CLOSE hand pump stroke, return both hand
pump selection isolation valves back to the automatic position.
5.4.2.5 Accumulator override Feature ((Optional))
To stroke the actuator OPEN or CLOSED using the accumulator override isolation
valves , open valve (AD) to stroke the actuator open, or open (AE) to stroke the
actuator closed.
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