36
September 2020
Service Instructions
MAN-02-08-77-0714-EN Rev. 2
Section 4: Set-up/Start-up Procedure
Set-up/Start-up Procedure
4.9.2.4
Toggle the OPEN/CLOSE Selector Switch to start the Electric Motor. The
Hydraulic Pump Draws Fluid from the Reservoir and discharges fluid to
the nitrogen pre-charged accumulator.
4.9.2.5
Upon completion of the charging of the accumulator, the pressure switch
set point will be reached and it will stop the electric motor.
4.9.2.6
Energize the desired solenoid valve (J) to open the actuator or (K) to close
the actuator.
4.9.2.7
Upon completion of the open or close stroke, the Limit Switch(s) can be
configured to de-energized the solenoid that is energized. Some field
installations can use the customer’s control room logic to de-energize
the solenoids after the actuator stroke open or close is reached.
Figure 21
2-Way Remote Electric With an ESD Solenoid Function Schematic
(L)
Hand Pump Selector
(M)
Hand Pump Selection Valves
(H)
Accumulator Isolation Valve(Optional)
(N)
Accumulator Isolation Valve(Optional)
(J)
Opening Solenoid
(K)
Closing Solenoid
(O)
Hand Pump Isolation Valve
(P)
ESD Solenoid Valve(Optional)
M
M
L
H
N
J
Y
K
O
P
4.10
Other Options
Other options such as Partial Stroke Test may have been supplied with this order.
Refer to supplemental start-up procedures supplied with these options for start-up and test.
The functional test of the Electro-Hydraulic Actuator is now complete.
The Bettis EHO Actuator is now operational and ready for service.
