Installation Manual

ValveWatch II Hardware Installation and Setup Manual
Page 32 of 34
CRANE
Nuclear
11 Equipment Cleaning Instructions
11.1 LDAU Assembly Cleaning Instructions
The LDAU assembly is installed in a NEMA 4 enclosure in the plant environment. Before starting
any cleaning process, the DC power to the unit must be disconnected. For lose particles, vacuum
and or air pressure can be used effectively to remove most typical plant type dirt. In the event that
a substance adheres to the unit and/or internal components and the best approach to take is to use
an isopropyl alcohol solvent on a soft clean cloth or towel to remove excess dirt on labels and
exposed surfaces. It may be beneficial to attempt multiple passes and discard dirty cloths as the
process advances. Once the LDAU components and area are cleaned, dry air should be blown
across all components to ensure the unit is dry. A visual inspection of all interconnects should be
made to ensure no disconnections have occurred during the cleaning process. Apply power to the
system and perform a basic operational verification test.
11.2 HUB Assembly Cleaning Instructions
The HUB Assembly is installed in rack mount cabinet space. Before starting any cleaning process,
the AC power to the Unit must be disconnected.
NOTE: Disconnecting AC power will disable all valves being monitored by the HUB Assembly.
For lose particles, vacuum and or low air pressure can be used effectively to remove most typical
plant type dirt. In the event that a substance adheres to the unit and/or internal components and the
best approach to take is to use an isopropyl alcohol solvent on a soft clean cloth or towel to
remove excess dirt on labels and exposed surfaces. It may be beneficial to attempt multiple passes
and discard dirty cloths as the process advances. Once the Hub Assembly is cleaned, dry air
should be blown across all components to ensure the unit is dry. A visual inspection of all
interconnects should be made to ensure no disconnections have occurred during the cleaning
process. Apply power to the system and perform a basic operational verification test once the unit
is powered up.
11.3 Dynamic Pressure Sensor Cleaning Instructions
The dynamic pressure sensors are attached to a block and bleed type valve that interfaces it with
the main process flow. A protective housing is recommended with every sensor installation.
Cleaning may be required for purposes of identification or part of a standard plant cleaning
process. Do not use High Pressure or high temperature liquids as part of the cleaning process.
Such use could inadvertently damage the wire and/or connections to the sensor and the LDAU.
Use of water soluble detergents should be used with a cloth or sponge and rubbing effort.
Caution:
Follow applicable site procedures to access and ensure that the cleaning process does not impact
the plant safety or operation requirements.
Comment [t1]: Section required for
61010.