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  1. AliNaseem2

    Unidentified Damaged cable

    During excavation an underground cable was damaged, the cable had no markers, no one has claimed ownership of the cable as of yet. I believe the cable is very old and already decommissioned, the client want us to perform a test weather the cable is connected somewhere or not and trace its...
  2. AliNaseem2

    How to calculate Weight of steel structure

    Hi, I am working on a project where we have to erect a steel structure for capacitor banks, I need to calculate weight of each part of steel structure for erection, Weight of each piece needs to be put on lifting certificate and calculate safe working load. I tried looking online but can't get...
  3. AliNaseem2

    2- Pump Control Panel ( Confusions )

    @LittleInch it's not the best written manual I've ever seen... ( its the Worst Written manual i have seen so far or the Weirdest panel) I have Tried as you mentioned the pump works now in automatic mode but the pumps run for 1 min almost and then stop automatically , no idea why i actually...
  4. AliNaseem2

    2- Pump Control Panel ( Confusions )

    @LittleInch First the Setting for the Dip Switches are as following , Dip Switch - 1 : OFF Dip Switch - 2 : ON Dip Switch - 3 : OFF Dip Switch - 4 : OFF Dip Switch - 5 : ON Dip Switch - 6 : OFF Dip Switch - 7 : OFF Dip Switch - 8 : OFF For the Operation at the i want to operate the pumps...
  5. AliNaseem2

    2- Pump Control Panel ( Confusions )

    @LittleInch actually the Pumps Came Along with the Panel from the manufacture , Please Check the Attachment , i have already attached the Pump Control Panel Datasheet which includes all the modes and wiring diagram
  6. AliNaseem2

    Volume Damper Near Exhaust Fan Entry

    We have Installed 6 Centrifugal Exhaust fans for Multi Purposes ( Toilets Ventilation , Kitchen Hood Exhaust , Public area Exhaust ) . we have installed dampers on each branch in the ducting system , but now the Consultant is asking us to install the Volume damper on the roof near the exhaust...
  7. AliNaseem2

    2- Pump Control Panel ( Confusions )

    HI, Dear All , I have bough Vertical Multistage pumps 3/phase ( 1 stand by & 1 Operation ) with a Control Panel ( Smart EVO 2 ) , i have done the following steps to run the pump no.2 ( since Pump no.1 in on Standby ) with an on/off Float Switch in emptying/Auto mode : First Step - (...
  8. AliNaseem2

    Closed Loop Chilled water Makeup Water / Expansion Tank / Air Separator

    Deal All , The Highest point of system is only 6 meter's higher than the makeup water pump set , its already located on roof top , Can i just simply connect the Makeup Like to the Main Line of Chilled Water return , or should i make the Connection into the Air Separator , The Air separator...
  9. AliNaseem2

    Closed Loop Chilled water Makeup Water / Expansion Tank / Air Separator

    Dear MFJewell so the purpose of the Chilled water makeup pump is to fill the system only , so select the pump to fill the system at the top most point ?? i think the Pressurization unit is same as the makeup water pumps with pressure vessel ?? or i am mistaken ? so if there a leak in the...
  10. AliNaseem2

    Closed Loop Chilled water Makeup Water / Expansion Tank / Air Separator

    Hello Everyone , I have a Closed loop chilled water system , its a Primary (constant Speed) and (Secondary variable Speed) System , all the Pumps and the Chilled are located at the Roof Top and the Loads(ahus,fcu) at Ground level . The Closed loop System Should be Pressurized at a Specific...
  11. AliNaseem2

    Pressure Regulating Valve and Pressure Reducing Valve

    the Thing is that the Drawing is making me more confuse regarding the location of theses valves , why only these particular location . Please review the Attachment http://files.engineering.com/getfile.aspx?folder=1afb78c4-bf66-4a4e-ba82-d71e5d32a99a&file=01-M4-WS-109.pdf
  12. AliNaseem2

    Pressure Regulating Valve and Pressure Reducing Valve

    Dear All , I Am little confused between these two valves , Pressure Regulating Valve and Pressure Reducing Valve . as per study i think both are same but why different names , Please review the Attached Drawing , the Pressure Reducing Valve is been only installed to the hot water supply...
  13. AliNaseem2

    What is the function of pressurization unit in chilled water system?

    What is the function of pressurization unit in chilled water system? i have a Primary , secondary pumping chiller system , Why we need a Pressurization unit with makeup water in a closed loop chilled water system , what should be the location of PU in a Complete Closed loop
  14. AliNaseem2

    Chilled water piping support

    HI, Dear all , the problem is that even as a contractor mechanical engineer , i do all the design and calculation for the consultant , and propose to him , plus i have searched online as well , the only way i found was go back to basics .
  15. AliNaseem2

    Steam And sauna room ventilation design considerations

    HI, I am working on a hotel project , in which we have steam and a sauna room , when designing i didn't provide any extraction duct for the rooms but the operator requested to have a extraction in the steam room , but i don't get the point why do we need extraction in the steam and sauna...
  16. AliNaseem2

    Chilled water piping support

    HI, I have chilled water piping , Water supply piping on roof top , and to be economical i am using a steel I beam and L shape -MS steel angle which will be used for the piping support and supported by to stands on each end . Either i can go back to basics and start calculating the I beam...
  17. AliNaseem2

    Electric water Heater indoor or outdoor

    HI , Dear All , I have always seen that the Electric water heater is installed indoor . What if we place the Circulation pumps and Electric water heater out door into the direct sun . what will be the effects of this , or is it highly recommend that the Electric water heater should be placed...
  18. AliNaseem2

    Rain pipe connected to Waste pipe

    Yes Waste pipe : from floor drains , sinks , Shower Drain Soil pipe : WC That's true we have risk for over flows , thank you :)
  19. AliNaseem2

    Rain pipe connected to Waste pipe

    Hi , Quick Question . i have different piping for waste , soil and rain , what if i connect the rain pipe to the waste pipe , is it OK by plumbing code , or there is a solid reason that both pipes cannot be connected , Feed me with your knowledge , Thanks , note : i have a rain pipe...
  20. AliNaseem2

    Chiller piping and Loops

    no i don't have individual pump , i have main primary and secondary pump on roof top only , but its a closed loop piping so supply is connected to the return at the very end . is there any other valves or joints required in the risers ??

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