Installation, Operation and Maintenance Manual
VCIOM-15345-EN Rev. 1
February 2022
31
Start-up Procedure
Section 4: Start-up Procedure
4.9
Function Test with Local Controls
NOTICE
If the Biffi 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.
4.9.1
Ensure the Handpump Isolation Valve (8) is open and check to see Manual Bypass
Valve (Lockable) is closed.
4.9.2
Use the OPEN/CLOSE Selector Knob to Power Stroke the actuator. The Electric
Motor will start to run, driving the Hydraulic Pump. The Hydraulic Pump
draws fluid from the Reservoir and pushes it into the Biffi G or E-Series
hydraulic cylinder. As the actuator strokes, the spring will compress in the
Spring-Return Module. At the same time, the Hydraulic Pump will also start
charging the accumulator(optional). The Hydraulic Pump will continue to charge
the accumulator till the accumulator is fully pressurized as per setting on the
Pressure Switch. The Hydraulic Pump Motor will stop once the accumulator is fully
charged. This accumulator pressure will be used for power strokes of the actuator
until the accumulator pressure drops to below the pre-determined setpoint. The
Hydraulic Pump Motor restarts again to recharge the Accumulator until it reaches
the setpoint of the Pressure Switch.
NOTICE
When the actuator power is connected, the Hydraulic Pump Motor does not start
immediately if the Accumulator pressure is below the pre-determined setpoint. The motor
runs only after there is a command to Open or Close the actuator.
