Sections

Section 23 21 23

Replace current section in its entirety to include new requirements of general design and installation.

Original Revision Request

Section was updated primarily for the following reasons:

  1. To develop and document General Owner Requirements in order to define basic desgin intent and selection criteria.
    1. Goal - to provide guidelines to promote and achieve efficiency and reliability throughout entire operating range.
  2. To update the Equipment Requirements for the technical details of pump construction.
    1. Goal - to improve specifications in order to achieve better and more serviceable pumps.
  3. To develop and document the Execution (Installation, Operation, and Start-up/Commissioning) Requirements.
    1. Goal - to achieve better installations, better operating efficiency and longer life out of pump systems.
    2. Note the following special points:
      1. Manual balancing valves and Triple Duty Valves are not to be used at pump discharges.
      2. Pump leveling and base grouting requirements.
      3. Vibration Control and Final Alignment Requiprements.
      4. Impeller trimming requirements more stringent than ASHRAE 90.1.