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  • Users: mabed
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  1. mabed

    Manifolded chilled water primary

    I have a chilled water system with the following equipment: -16 chillers 600 gpm each -6 constant speed primary pumps 1600 gpm @ 85 ft of water each. -Three sets of variable speed secondary pumps. * 1st set 4 pumps 1800 gpm @ 130 ft of water. (serving low level) * 2nd set 2 pumps 700 gpm...
  2. mabed

    Fire pump flow

    Good day, I am checking the fire drawings of a project, The fire pump is sized to be 1500 gpm, but as per NFPA 14 section 7.10.1.1.5 "The maximum flow rate shall be 1000 gpm (3785 L/min) for buildings that are sprinklered throughout, in accordance with NFPA13, Standard for the Installation of...
  3. mabed

    VAV vs FCU system

    I'm working on a ten floors office building, and the A/C system is chilled water air handling units in first and roof floors with VAVs (about 35 VAV per floor). I am checking if it will save money and installation time to change to chilled water fan coil units since my chilled water riser...
  4. mabed

    Combine light hazard and ordinary hazard spaces to one zone control valve

    I am working on an office building, and have a mechanical space for air handling units adjacent to office space. My question is can I combine both spaces to one sprinklers zone control valve or do I need one for ordinary hazard area and one for light hazard?
  5. mabed

    How ro protect operating rooms from fire??

    Greetings, I am working on a hospital project. I got a recommendation from a specialist to use clean agent fire extinguisher in operating room. I want to know what are the automatic protection systems I can use in operating rooms as per NFPA or other codes.
  6. mabed

    Chilled water primaryûsecondary system bypass

    Greetings, I have four chillers system (three 223 TR (446GPM) and one 183 TR (364gpm)), the bypass between primary pumps header (one pump dedicated for each chiller) and secondary pumps header is 8". I was reading about bypass and chillers sequence of operating, I found out that Train recommends...

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