2. A.O. Smith
  3. Conventional System Piping

A.O. Smith Conventional System Piping Technical Documents

  • Hello! I am an AI chatbot trained to assist you with the A.O. Smith Conventional System Piping Technical Documents. I’ve already reviewed the document and can help you find the information you need or explain it in simple terms. Just ask your questions, and providing more details will help me assist you more effectively!
Revised June 1998 (Reviewed March 1999) © A. O. SMITH CORP. 1998 Printed in the U.S.A. E 107.0
20° Temperature Rise 30° Temperature Rise 40° Temperature Rise
Model Inlet / Outlet
Size
APPLICATION TYPE DIAGRAM
SEE INSTALLATION MANUAL FOR
COMPLETE INSTRUCTIONS
INSTALL IN ACCORDANCE WITH LOCAL CODES.
TYPICAL PIPING FOR CONVENTIONAL
SINGLE BOILER INSTALLATION
HW-300 thru HW 670
* PIPE RELIEF VALVE TO OPEN DRAIN.
GPM PD-Ft/hd GPM PD-hd GPM PD-Ft/hd
HW-300 1 1/4" 23 8.0 15 3.0 11 2.0
HW-399 1 1/2" 30 16.0 20 7.0 15 5.0
HW-420 1 1/2" 32 18.0 21 8.0 16 5.5
HW-520 2" 39 12.0 24 5.0 20 4.0
HW-670 2" 51 22.0 34 10.0 25 5.5
SYSTEM NOTES:
• The System Pump must be sized to maintain the minimum
recommended flow rate through the boiler. The pump must
operate continuous or cycle with the boiler.
• The By-Pass is required for systems designed to operate at
flow rate higher than the maximum recommended flow rate
of the boiler.
• This piping method is not recommended for systems designed
to operate with return water temperatures less than 110°F. (See
recommended piping method for Low Temperature Heating Systems
A&E Page E 112.0.)
June 2007R
/