Safety
Before installing this product, become familiar with the installation instruc-
tions presented in Section 3, Appendix A and all safety notes throughout.
!
WARNING: This symbol identifies information about practices or circum
-
stances that can lead to personal injury or death, property damage, or
economic loss.
CAUTION: Indicates actions or procedures which if not performed correctly
may lead to personal injury or incorrect function of the instrument
or connected equipment.
IMPORTANT: Indicates actions or procedures which may affect instrument operation or
may lead to an instrument response that is not planned.
Changing Switch Set Point ......................................................................... 20
Definitions of Terms
................................................................................. 20
Best Practices for Set Points ................................................................... 20
Changing Set Point of an In-Service Instrument (Not Recommended for
Nuclear Qualified Units)
.......................................................................... 21
Changing Set Point of an Out-of-Service Instrument .............................. 22
Range Changes ...................................................................................... 22
Troubleshooting ......................................................................................... 23
Section 4—Assembly Drawing and Parts List
........................................... 25
Section 5—Dimensional Drawings
............................................................. 33
Appendix A—Model 224 DPU
....................................................................A-1
DPU Description ........................................................................................A-1
Specifications
.........................................................................................A-1
Theory of Operation ...............................................................................A-3
DPU Installation .........................................................................................A-4
General...................................................................................................A-4
Mounting.................................................................................................A-5
Piping .....................................................................................................A-5
Piping Diagrams .....................................................................................A-6
Startup ..................................................................................................A-12
DPU Maintenance ....................................................................................A-12
DPU Cleaning and Inspection ..............................................................A-13
Changing the DPU Range ....................................................................A-14
Replacing the Bellows Unit Assembly (BUA) .......................................A-14
DPU Troubleshooting ...............................................................................A-15
DPU Assembly Drawing and Parts List ....................................................A-17
DPU Dimensional Drawing ......................................................................A-19