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Recent content by Takket3

  1. Takket3

    Quantity of water need to change static pressure

    Thank you all for the replies! I will indeed isolate the expansion tank.
  2. Takket3

    Quantity of water need to change static pressure

    i have a closed chilled water loop w/ glycol. total system volume is about 20,000 gallons. I need to drain a section of pipe that is, fortunately, at the top of the system. This piece of pipe holds about 200 gallons of fluids. I need to drain the fluid to totes to hold it while the pipe is...
  3. Takket3

    Hydronic system fill PRV setting?

    I know from the following that a PRV should be set to maintain 4PSI at the top of the system for "positive venting". https://www.deppmann.com/blog/monday-morning-minutes/07th/ But what if the PRV is actually at the top of the system? (Same elevation as my chilled water piping). Do i just set...
  4. Takket3

    Vent from condensate receiver tank to atmosphere

    @georgeverghese In the first place, why the level overflow from this tank? - what happened to the high level trip transmitter / switch or the trip loop ? Is it installed and configured correctly? When was the last time this trip loop was checked by your instrument maintenance team? The tank...
  5. Takket3

    Vent from condensate receiver tank to atmosphere

    @racookpe1978 Steam condensate, or some other liquid? Steam condensate What environment hazards in the liquid? The steam is chemically treated which is all the more reason to be venting it outdoors and not inside the building!!! What safety hazards (heat, hot liquid dropping or spraying on...
  6. Takket3

    Vent from condensate receiver tank to atmosphere

    @Littleinch Why a "huge mess"? Did you get fluid out of the vent? The vent terminates into a pit that is normally exhausted by a fan. The fan was turned off, and the pit filled with steam/water vapor which backed up into the rooms above the pit. Everything in those rooms got the sauna...
  7. Takket3

    Vent from condensate receiver tank to atmosphere

    @pennpiper - What kind of building is this? Why does that matter? - Does it have a built in Drain System for Spills? Yes, the tank can be drained, but the issue is a vent line, not the drain. - How far is it to the nearest Wall? About 20 feet - What is just outside that wall? An areaway...
  8. Takket3

    Vent from condensate receiver tank to atmosphere

    We recently discovered, when a huge mess was made, that the vent off our condensate receiver tank does not extend to outdoors. I want to extend the vent to outside but is there anything special about the termination of the pipe I need to do? Does it need to be a certain distance above grade...
  9. Takket3

    Location of differential pressure sensor

    Thanks all for your help. There is a process branch just a few feet away from the most remote AHU branch so we are just going to put it in the process branch, then open the chilled water valves, ramp up the pumps, and measure the DP to determine our setpoint.
  10. Takket3

    Location of differential pressure sensor

    Sketch attached as requested. There are a couple of other branches to AHUs between the process equipment and the last AHU which I didn't show, but you get the idea. The entire system is at the same elevation on one floor of the building.
  11. Takket3

    Location of differential pressure sensor

    Hi… question……. I’m looking to locate a differential pressure sensor for a secondary pump VFD in a chilled water system. The chilled water system serves process equipment and runs 365 days a year. I know that typically you want the sensor across your most remote piece of equipment to make sure...
  12. Takket3

    Humidifier before or after cooling coil?

    I agree berkshire. Have a DDC system so should be able to do this with programming.
  13. Takket3

    Humidifier before or after cooling coil?

    Let me clarify......... Suppose I'm out in the desert bringing in 100% outdoor air. 95 degrees, 5% RH I want 55 grains in my supply to my space. Should I humidify to 55 grains before I hit the cooling coil (assuming the coil is set to a temperature so as to NO dehumidify the air below 55...
  14. Takket3

    Humidifier before or after cooling coil?

    Curious if anyone has an opinions on placing a humidifier before or after a cooling coil? We have a process where we need to deliver 55 grains (+/-5). The AHU is 100% outdoor air. So in the cold/dry winter it is no mystery. We heat the outdoor air and humidify. On hot/moist summer days, again...
  15. Takket3

    Parallel Fan powered VAV box with primary heating

    I have a parallel fan powered VAV box. It has a minimum primary CFM to provide ventilation. In cooling mode, electric reheat is used to prevent subcooling. My packaged rooftop has a gas fired heating coil so it delivers primary heating air to the VAV box as well. Question is, how do I prevent...

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