Specifications

Department of Facilities Services
Chilled Water Distribution System
2013 Design Guidelines 3 | Page
Welded Pipe Joints .................................................................................................................................. 27
Pipe Welding ........................................................................................................................................... 27
PIPE HANGERS AND SUPPORTS ............................................................................................................. 27
Hanger Rods (Metallic) ........................................................................................................................... 27
Bolts, Nuts, Studs and Washers .............................................................................................................. 28
Installation ............................................................................................................................................... 28
Hangers and Support Spacing ................................................................................................................. 28
PIPING SYSTEM PRESSURE TEST .......................................................................................................... 29
FLUSHING AND CHEMICAL CLEANING OF CHILLED WATER ABOVE GROUND PIPE
SYSTEMS .................................................................................................................................................. 29
Contractor Qualifications ........................................................................................................................ 29
Submittals ............................................................................................................................................... 29
Piping System Cleaner ............................................................................................................................ 30
Batch Chemical Feeder ........................................................................................................................... 30
Execution ................................................................................................................................................ 30
Flushing ................................................................................................................................................... 31
Cleaning .................................................................................................................................................. 31
Final Fill .................................................................................................................................................. 32
MECHANICAL INSULATION ................................................................................................................... 32
Product Delivery, Storage and Handling ................................................................................................ 32
Application .............................................................................................................................................. 32
Installation ............................................................................................................................................... 32
PIPE IDENTIFICATION .............................................................................................................................. 33
BRIDGE CONTROLS ............................................................................................................................................ 34
PRIMARY/SECONDARY BUILDING BRIDGE SYSTEM - DESCRIPTION OF OPERATION ............ 34
BRIDGE OPERATION FOR NON-ESSENTIAL AND ESSENTIAL LOADS ......................................... 34
Building and EMCS Interface ................................................................................................................. 34
Boost Coupled Mode .............................................................................................................................. 34
Decoupled Mode ..................................................................................................................................... 34
Coupled Mode ......................................................................................................................................... 35
Failure Mode ........................................................................................................................................... 35
INTERLOCKS AND METERING ............................................................................................................... 36
INSTRUMENT SPECIFICATIONS ............................................................................................................. 36
PANEL Bridge Panel/Control Cabinet ............................................................................................... 36
MC-1 Multi Loop Digital Controller ................................................................................................ 36
VFD Variable Frequency Drive ....................................................................................................... 37
TCV-A Return Temperature Control Valve ........................................................................................ 39
Alternate TCV-A Return Temperature Control Valve ........................................................................ 40
FV-B, FV-P Bypass Valves ................................................................................................................. 40
Alternate FV-B, FV-P Bypass Valves ................................................................................................ 41
FE/FT 1 Flow Element/Transmitter ..................................................................................................... 41
RTU, STU, RTB, STB Temperature Sensor Assembly ....................................................................... 41
Thermowell for RTD Sensor ................................................................................................................... 42
Thermometers ......................................................................................................................................... 42
Thermowell for Thermometer ................................................................................................................. 42
BE Bridge Enable Signal ....................................................................................................................... 42
PDT–1, 2 Differential Pressure Transmitter ...................................................................................... 42
Electrical Interlocks for Pump(s) ............................................................................................................ 43