Table of Contents
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CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
High Temperature Water Heating System Control ........................................................................................... 374
Introduction .......................................................................................... 374
High Temperature Water (HTW) Heating ........................................ 374
High Temperature Water Safety ...................................................... 375
HTW Control Selection ........................................................................ 375
HTW Valve Selection ........................................................................... 375
Valve Style ...................................................................................... 375
Valve Body Materials....................................................................... 375
Valve Trim ........................................................................................ 376
Valve Packing .................................................................................. 376
Valve Flow Characteristics .............................................................. 376
Actuators ......................................................................................... 376
Valve Size ....................................................................................... 376
Valve Location ................................................................................. 376
Instantaneous Converter Control ........................................................ 376
HTW Coils ........................................................................................... 377
HTW Space Heating Units .............................................................. 378
Storage Converters ......................................................................... 378
Multizone Space-Heating HTW Water Converters .......................... 378
HTW Steam Generators ................................................................. 379
............................................................................................................ 380
Introduction .......................................................................................... 380
Heat Sources .................................................................................. 380
The Distribution Network ................................................................. 380
The Substation ................................................................................ 381
Abbreviations ....................................................................................... 381
Definitions ............................................................................................ 381
Symbols ............................................................................................... 382
System Configuration .......................................................................... 382
Heat Generation .............................................................................. 382
Heat Distribution Network ............................................................... 382
Hot Water System Control ............................................................... 382
Steam System Vs Hot Water System .............................................. 383
Hot Water Pipeline System ............................................................. 383
Booster Pump Station ..................................................................... 383
Pressure Reducing Stations ........................................................... 383
Mixing Station ................................................................................. 383
Key Points ....................................................................................... 384
Heat Transfer Substations ............................................................... 384
Direct Heat Transfer Substations ................................................ 384
Indirect Heat Transfer Substations .............................................. 385
Hybrid Heat Transfer Substations ............................................... 386
Control Applications ............................................................................ 387
DDC Control of High Performance Substation ................................ 387
DDC Control of a Small House Substation ..................................... 389
with Domestic Hot Water ............................................................ 390
Hybrid Building Substation .............................................................. 393
294
ENGINEERING MANUAL OF AUTOMATIC CONTROL
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