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  • Users: lfg2007
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  1. lfg2007

    Pipe testing - Air vs water testing

    I am being told that air testing is the same as water testing for pipie pressure testing. I do not believe that the air pressure required would be the same as water. Also theree is probably a saftey issue for high pressure test. Test would be 150 psi water max. Any thoughts
  2. lfg2007

    Plumbing booster pump

    The toilets in a new building are not flushing correctly. It is being blamed on the size of the pump. The booster pump which has a duty and standby pump rated at 114' head and 45 gpm each and a jockey pump rated at 114' head and 22 gpm in the basement ( elev 35’ ) has 60 psig and they are only...
  3. lfg2007

    preheats in AHUs

    I am having problems with preheats in AHUs. Inside each AHU is a heating coil (Brasch)and an ultrasonic humidifier. The distance between the heating coil and the humidifier is approx 8". The unit pulls air from the outside across the heating coils to the humidifier to the cooling coil. Some...
  4. lfg2007

    NFPA Signoff

    Who is responsible to sign off a project when the sprinkler system is designed by a FP contractor according to specifications by the project engineer. FP drawings and calcs submitted by contractor were sealed by PE.
  5. lfg2007

    Pump controllers

    Has anyone heard of having three individual power feeds ( one for each pump) into the controller of a triplex booster pump package. The package I have onsite has one power feed into the controller and then individual feeds to each pump.
  6. lfg2007

    Centrifigal chillers

    I have 4 Carrier Centrifigal chillers under commissioning phase. Recently the units (4) shut down while starting on "VFD over temp" alarm. I was told this was caused by the condenser water being warmer than the chilled water. This situation was caused by running the secondary loop without the...

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