It is normally installed on return because of the following reasons: 1. ASHRAE Recommendations. 2. The coil of the unit should be flooded in case the valve is closed. 3. With a control valve on the return side, the water is at a higher pressure through the coil, reducing off gas, thereby lowering dissolved oxygen content. Lower dissolved oxygen extends equipment life by minimizing the air entrapment. 4. In coil return line, after AHU/FCU install two way or three way valve, afterward install DRV due to above reasons
Sain how we distribute the equal load to AHU like if our 3nos pumps 400 GMP =1200 GPM how we distribute the equal load to AHU we installed 4 numbers AHU which valve we installed in the main line. I hope you understand myquestion
Very helpful video thank you so much .sir chiller K bare may video banaye chiller Ka shafty device
Welcome... insha'Allah
Nice dear Sir Engr. Tanveer Ahmed sethar sahab Weldone works for all other engineers,thanks.
Thank you dear
Nice video Sir.
DRV se pehle 2 way or 3 way valve lagta hai kya Sir.
Agar DRV ke baad hoga 2 way or 3 way valve to kya hoga.
pls explain.
It is normally installed on return because of the following reasons:
1. ASHRAE Recommendations.
2. The coil of the unit should be flooded in case the valve is closed.
3. With a control valve on the return side, the water is at a higher pressure through the coil, reducing off gas, thereby lowering dissolved oxygen content. Lower dissolved oxygen extends equipment life by minimizing the air entrapment.
4. In coil return line, after AHU/FCU install two way or three way valve, afterward install DRV due to above reasons
@@TanweerAhmed 👍👌
Very well explained.
Thanks
Informative video
Thanks
Assalam O Allikum Tanweer Sahib...are the primary pumps VFD operated or not?
W.Salam, primary pumps are not vfd operated, they are constant speed flow
@@TanweerAhmed I am working on a project where we have primary pumps only which are vfd based? is that a good model to adopt?
Sir chiller Ka shafty device aur display may kese settings krege iska video banaye... thank you
Welcome... insha'Allah
Sain how we distribute the equal load to AHU like if our 3nos pumps 400 GMP =1200 GPM how we distribute the equal load to AHU we installed 4 numbers AHU which valve we installed in the main line. I hope you understand myquestion
Load distribution shall be as per flow of chilled water in AHU. Chilled water flow shall be balanced through balancing valve.
Good video
Thanks
Which was shown in the drawing each pump was connected to each chiller, instead of this we can place pump common header to connect chiller ???
These are standard practice and further you can do on your wish.
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Good information
Thanks
Decopler line and decopler valave Kya hota h sir please tell me?
Decoupler line is the pipe connection between primary and secondary loop of chilled water system. Decoupler valve is that which is used in this line.
@@TanweerAhmed thanks you sir..but why use in primary and secondary loop.. what is the purpose?
When primary pumps are constant speed and secondary pump are variables speed, so extra flow goes as bypass through decoupler
I suggested to watch my videos of chiller water loops then your concept will be clear and will understand
@@TanweerAhmed ok sir video link send Kar dijiye sir..