Function Test - Emerson Bettis EHO Installation, Operation And Maintenance Manual

Section 4: Set-up/Start-up Procedure
December 2022
4.8

Function Test

NOTE:
If the EHO Actuator is supplied with optional ESD before operating a motor powered
stroke, a customer supplied ESD signal must be present and Solenoid Valve (17) energized.
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
4.8.6
4.8.7
4.8.8
4.8.9
4.8.10 With the actuator at Fail-Safe Position, press and release the OPEN/CLOSE
4.8.11 While the motor is running, push the STOP PUSHBUTTON. The motor and actuator
4.8.12 Press and release the OPEN/CLOSE PUSHBUTTON to fully power stroke the actuator.
4.8.13 Return the actuator to its original position.
4.8.14 Turn the LOCAL-OFF-REMOTE selector switch to REMOTE.
4.8.15 Press the CLOSE PUSHBUTTON and then press the OPEN PUSHBUTTON.
4.8.16 Turn the LOCAL-REMOTE selector switch to LOCAL. Try the CLOSE PUSHBUTTON
28
Ensure the Handpump Isolation Valve (8) is open and check to see Manual Bypass
Valve (Lockable) (19) is closed.
Push and release the OPEN/CLOSE PUSHBUTTON to Power Stroke the actuator.
The Electric Motor (2) will start to run driving Hydraulic Pump (3). The Hydraulic
Pump (3) draws fluid from Reservoir (4) and pushes it into the Bettis G or E-Series
hydraulic cylinder (1). As the actuator strokes, the spring will compress in the
spring-return module.
At the end of the power stroke, pressure will increase filling the ((optional))
Accumulator. Pressure will increase, with or without the ((optional)) accumulator,
till it reaches the setting on pressure switch (23); pressure switch (23) will operate
and stop the motor.
Push and release the OPEN/CLOSE PUSHBUTTON. 2-way N.C. Solenoid Valve
energizes, venting the fluid in the power cylinder to the reservoir. At the Fail-Safe
Position, the OPEN/Close limit switch will operate de-energizing solenoid (6).
Spring-return module will stroke the actuator to the Fail-Safe Position.
Check all hydraulic lines and fittings for leakage, repair as needed.
Press and release the OPEN/CLOSE PUSHBUTTON to power stroke the actuator.
The motor (2) will start and pump fluid into Bettis G or E-Series hydraulic cylinder
to stroke the actuator. The actuator travels to the fully power stroked position and
the pressure switch or limit switch operates stopping the motor.
Push and release the opposing OPEN/CLOSE PUSHBUTTON to spring-return the
actuator to the Fail-Safe Position.
Cycle the actuator open and closed a few times to ensure operation.
PUSHBUTTON to power stroke the actuator. The motor (2) will start to pump fluid
into Bettis G or E-Series hydraulic cylinder to stroke the actuator.
will stop.
The actuator must remain at rest.
and OPEN PUSHBUTTON to ensure control returned to the LOCAL Control Mode.
Installation, Operation and Maintenance Manual
VA001-507-32 Rev. 1
Set-up/Start-up Procedure