Specifications

Department of Facilities Services
Chilled Water Distribution System
2013 Design Guidelines 2 | Page
Contents
Contents ......................................................................................................................................................................2
DESCRIPTION OF CHILLED WATER SYSTEM ..................................................................................................5
BUILDING SYSTEM - GENERALLY ...........................................................................................................6
PRIMARY/SECONDARY BUILDING BRIDGE SYSTEM – GENERALLY ..............................................7
BRIDGE RETURN TEMPERATURE CONTROL VALVE (TCV-A) DESIGN CRITERIA .......................8
UNDERGROUND CHILLED WATER DISTRIBUTION PIPING ...................................................................... 11
GENERAL .................................................................................................................................................... 11
Contractor Qualifications ........................................................................................................................ 11
Submittals (Copies to Chilled Water Engineer) ...................................................................................... 11
Record Documentation ........................................................................................................................... 12
Product Delivery, Storage and Handling ................................................................................................ 12
Pipe Materials ......................................................................................................................................... 12
VALVES ....................................................................................................................................................... 13
Butterfly Valves ...................................................................................................................................... 13
Valve Boxes ............................................................................................................................................ 13
Vent Valve Boxes ................................................................................................................................... 13
Tapping Sleeves ...................................................................................................................................... 14
Gate Valves (For Tapping Service Only)................................................................................................ 14
INSTALLATION .......................................................................................................................................... 14
CLEANING AND FLUSHING OF UNDERGROUND PIPING ................................................................. 15
Chilled Water (4” to 42”) ........................................................................................................................ 15
TESTING ...................................................................................................................................................... 16
CHILLED WATER BRIDGE ................................................................................................................................. 18
GENERAL .................................................................................................................................................... 18
Contractor Qualifications ........................................................................................................................ 18
Submittals (Copies to Chilled Water Engineer) ...................................................................................... 19
PRODUCT DELIVERY, STORAGE AND HANDLING ........................................................................... 19
VALVES ....................................................................................................................................................... 20
Butterfly Valves ...................................................................................................................................... 20
Butterfly Valve Installation ..................................................................................................................... 20
Chain Wheel Operators ........................................................................................................................... 21
Ball Valves .............................................................................................................................................. 21
Drains/ Vents .......................................................................................................................................... 21
INSTRUMENTATION ................................................................................................................................. 21
BUILDING CHILLED WATER PUMP ....................................................................................................... 22
Design Criteria ........................................................................................................................................ 22
Centrifugal Pumps................................................................................................................................... 23
MOTORS ...................................................................................................................................................... 23
Motor Grounding .................................................................................................................................... 24
Installation ............................................................................................................................................... 24
Pump Startup ........................................................................................................................................... 25
PIPE MATERIALS ....................................................................................................................................... 26
Flanges .................................................................................................................................................... 26
Flange Gaskets ........................................................................................................................................ 26
Bolting ..................................................................................................................................................... 26
PIPING INSTALLATION ............................................................................................................................ 26