Emerson Bettis EHO Installation, Operation And Maintenance Manual page 37

Installation, Operation and Maintenance Manual
VA001-507-32 Rev. 1
5.4.6
1.
2.
3.
NOTE:
If equipped with ESD, Do Not open Isolation Valve (8) before the customer supplied ESD
Signal is present.
4.
NOTE:
Manual Bypass Valve (Lockable) (19) must be closed to enable any mode of operation.
Handpump Isolation Valve (8) must be open for normal operation.
Operation
Manual Handpump Power Stroke
Close handpump isolation valve (8).
Stroke handpump (13) until the OPEN/CLOSE stroke is complete.
Open isolation valve (8) when the handpumping is complete.
To stroke the actuator to the Fail-Safe Position, if required, slowly open Manual
Bypass Valve (Lockable) (19).
Section 5: Operation
December 2022
33