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Manual 26824
CPC-II Unit Replacement Procedure
Woodward
vii
Overspeed /
Overtemperature /
Overpressure
The engine, turbine, or other type of prime mover should be
equipped with an overspeed shutdown device to protect against
runaway or damage to the prime mover with possible personal injury,
loss of life, or property damage.
The overspeed shutdown device must be totally independent of the
prime mover control system. An overtemperature or overpressure
shutdown device may also be needed for safety, as appropriate.
Personal Protective
Equipment
The products described in this publication may present risks that
could lead to personal injury, loss of life, or property damage. Always
wear the appropriate personal protective equipment (PPE) for the job
at hand. Equipment that should be considered includes but is not
limited to:
Eye Protection
Hearing Protection
Hard Hat
Gloves
Safety Boots
Respirator
Always read the proper Material Safety Data Sheet (MSDS) for any
working fluid(s) and comply with recommended safety equipment.
Start-up
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Overspeed /
Overpressure
Never close the drain line when supply pressure is present on the
CPC unit, otherwise the control output pressure can increase
suddenly and cannot be controlled by the input setpoint. This could
cause the turbine to overspeed. The supply pressure isolation valve
and the control pressure isolation valve should always be closed
prior to closing the drain line.
Never disconnect redundancy linkage between CPCs when both
units are powered.