Thank you so much for the clear explanation of the system. Learned a lot from it and decided to subscribed. Just one question is there a way to calculate the pump flowrate?
Dear Sir The pump flow rate is stipulated on its batch . The installation flow rate is calculated taking in consideration many aspects . The heat exchanger have also its flow rate calculated already . The choice for the pump will be done accordingly to the flow rate . The flow-rate will be calculated for heat exchangers ,tank filling etc. Can you tell me please what do you need it for ?
@@TechnicalChallenger Well i was talking about the pump illustrated in the pressurization system. Is the pump built-in inside the pressurization unit or a stand alone one? I was curious how much fluid is the pump providing to the system when it detected a pressure loss?
@@johnmiranda4587 Hi John The pressurisation unit have the flow rate stipulated on its batch . There are two pumps that are alternating . The pumps does not have a big flow rate as it is not a recirculating pump. Also the pressurisation unit is just compensating the pressure loss governed by the loss of water . Because the pressurisation unit pump have such small flow rate when I fill the unit for the first time I always use the bypass . Technically you do not have to calculate a flow rate for pressurisation unit. The pressurisation unit is just injecting water in to installation to compensate the water loss because of air valves eliminators or tiny temporary leaks. When you buy the pressurisation unit you must choose the one that satisfy your designed system . They are pressurisation units that works inline with the main cold water using just a pressure reducer if the main pressure is huge. Other pressurisation units are equipped with a small water tank and pumps . 07946487538 This is my mobile no. Call me if you need more help . Kind regards . John
Am I right in thinking that using this example we would have to shut and drain down the system in order to check the expansion vessel charge? If so, should there not be another IV and DOV fitted in-between before it reaches the main line?
Yes you are very right . Thank you for that observation . I made this video explaining only the issues that could be generated by the inappropriate settings . Technically speaking you are perfect right . To segregate the system you need valves . Make sense . What can I say . I am privileged to met people with eagle eyes like you . Al my respect.
Let’s say Pressurization pump kicks in at 0.5 Bar. How about from 1.5 Bar , the operating pressure becomes 0.8 bar only and not reach yet the 0.5 Bar? Does expansion tank also kicks in through gravity and return the expanded water to the system? Or just wait the pressure to 0.5 Bar to make the pump compensate the pressure loss?
I have a system where the boiler is in the red at about 3bar causing the prv to realise water.the press unit digital screen says 1.1bar and when this kicks in to fill the heating through loss of water it goes from saying 1.1 bar to 2.3bar.what would my problem be.
How much water can collect the pressurisatoon tank? If the pressure in the line increases because of decrease in load and so that the ahu unit gets off with its valve?
Hi NiKhil The pressurisation unit should not compensate the water volume unless there is an accidental leak in to the system. The well calculated pressure vessels should be able to keep the pressure within the limits if the relation between the cold and hot agent volume has been well evaluated . If you have a tall building you must consider the starting pressure and then you must add the appropriate pressure vessels to compensate the volume increase generated by the rise in temperature . If the volume will not be compensate then the pressure will rise and if the go over the Pressurisation unit high set point if the system is well integrated it should stop. If the pressurisation unit’s high set point for alarm is set above the PRV’s set then the PRV will be triggered to save the system. If the system was well design then check the pressure vessels and see if they are properly pressurised and if they have the bellows inside healthy. If water poor out trough the air charging port then the pressure vessel must be replaced. So just to make one think clear. You can interfere with the pressurisation unit to fill the system hundreds times but that is not a healthy idea. Also you can ignore a PRV leak due to the incorrect temperature volume ratio but that is not what a good engineer is doing . If your system is very complex then use a vessel and fit it under the PRV. Then Rise the water temperature from the whatever it is until it reaches the working one used to heat the building. See how much water you are loosing trough PRV until the PRV stop leaking . Then repair the pressure vessels or get the appropriate one that are capable to reduce the pressure variation until it will stay within the anticipated bandwith.
@@nikhilharane262 If the pressure vessels are properly designed it should be ok . When you refer to stopping them you talk about heating or the pumps ?
Could you send me any video/ drawing for showing the connection between expansion tank, pressurization unit and air separator along with all safety and automation.
Dear Sir I have more videos about pressurisation units and boiler systems . If you will scroll trough my videos you will find more information . I did not really targeted expansion tanks systems as they are too simple . If you will dean with vented systems that imply expansion tanks make sure the tanks will be fitted at a reasonable hight so there will be enough pressure in to the system Send me your e mail to see what can I do .
dear sir Part winding connection is simple and there are a lot of video about it .If you really want one I ll do it with pleasure but there are a lot of very good ones .I can help you with some explanations if you need some guidance .
Great video thanks
Good explanation.. I watched it in 2x play speed.
Thank you Kiran
Thanks for the clear explanation, Mihai.
Aris
Cheers Aris
Method of explaining awesome
Thank you
Very clear. Cheers Bro👏👏👏
Thank You
I am learning my self
I am not professional but I think all technicians need information
amazing video
Thank you for you kind words .
Good explanation bro ❤️
Grete
Thank you so much for the clear explanation of the system. Learned a lot from it and decided to subscribed. Just one question is there a way to calculate the pump flowrate?
Dear Sir
The pump flow rate is stipulated on its batch .
The installation flow rate is calculated taking in consideration many aspects .
The heat exchanger have also its flow rate calculated already .
The choice for the pump will be done accordingly to the flow rate .
The flow-rate will be calculated for heat exchangers ,tank filling etc.
Can you tell me please what do you need it for ?
@@TechnicalChallenger Well i was talking about the pump illustrated in the pressurization system. Is the pump built-in inside the pressurization unit or a stand alone one? I was curious how much fluid is the pump providing to the system when it detected a pressure loss?
@@johnmiranda4587
Hi John
The pressurisation unit have the flow rate stipulated on its batch .
There are two pumps that are alternating .
The pumps does not have a big flow rate as it is not a recirculating pump.
Also the pressurisation unit is just compensating the pressure loss governed by the loss of water .
Because the pressurisation unit pump have such small flow rate when I fill the unit for the first time I always use the bypass .
Technically you do not have to calculate a flow rate for pressurisation unit.
The pressurisation unit is just injecting water in to installation to compensate the water loss because of air valves eliminators or tiny temporary leaks.
When you buy the pressurisation unit you must choose the one that satisfy your designed system .
They are pressurisation units that works inline with the main cold water using just a pressure reducer if the main pressure is huge.
Other pressurisation units are equipped with a small water tank and pumps .
07946487538
This is my mobile no.
Call me if you need more help .
Kind regards .
John
Am I right in thinking that using this example we would have to shut and drain down the system in order to check the expansion vessel charge? If so, should there not be another IV and DOV fitted in-between before it reaches the main line?
Yes you are very right .
Thank you for that observation .
I made this video explaining only the issues that could be generated by the inappropriate settings .
Technically speaking you are perfect right .
To segregate the system you need valves .
Make sense .
What can I say .
I am privileged to met people with eagle eyes like you .
Al my respect.
Let’s say Pressurization pump kicks in at 0.5 Bar. How about from 1.5 Bar , the operating pressure becomes 0.8 bar only and not reach yet the 0.5 Bar? Does expansion tank also kicks in through gravity and return the expanded water to the system? Or just wait the pressure to 0.5 Bar to make the pump compensate the pressure loss?
Dear Friend
Call me
I will explain
07956487538
I have a system where the boiler is in the red at about 3bar causing the prv to realise water.the press unit digital screen says 1.1bar and when this kicks in to fill the heating through loss of water it goes from saying 1.1 bar to 2.3bar.what would my problem be.
Check the pressure vessel inside the boiler and see if it is faulty or ifnit is correct presurised .
See if the temperature is gowing above 90’C
Is any different between pressure vessel and expansion tank?
Yes it is .
They are both keeping the pressure in control but they are different features .
One in open vented an the other one is closed circuit
life advice " watch the video @ x1.5 "
but good content tho
How much water can collect the pressurisatoon tank? If the pressure in the line increases because of decrease in load and so that the ahu unit gets off with its valve?
Hi NiKhil
The pressurisation unit should not compensate the water volume unless there is an accidental leak in to the system.
The well calculated pressure vessels should be able to keep the pressure within the limits if the
relation between the cold and hot agent volume has been well evaluated .
If you have a tall building you must consider the starting pressure and then you must add the appropriate pressure vessels to compensate the volume increase generated by the rise in temperature .
If the volume will not be compensate then the pressure will rise and if the go over the Pressurisation unit high set point if the system is well integrated it should stop.
If the pressurisation unit’s high set point for alarm is set above the PRV’s set then the PRV will be triggered to save the system.
If the system was well design then check the pressure vessels and see if they are properly pressurised and if they have the bellows inside healthy.
If water poor out trough the air charging port then the pressure vessel must be replaced.
So just to make one think clear.
You can interfere with the pressurisation unit to fill the system hundreds times but that is not a healthy idea.
Also you can ignore a PRV leak due to the incorrect temperature volume ratio but that is not what a good engineer is doing .
If your system is very complex then use a vessel and fit it under the PRV.
Then Rise the water temperature from the whatever it is until it reaches the working one used to heat the building.
See how much water you are loosing trough PRV until the PRV stop leaking .
Then repair the pressure vessels or get the appropriate one that are capable to reduce the pressure variation until it will stay within the anticipated bandwith.
Let me tell one thing there are total 37 AHUS each is having capacity of 98GPM(flow rate) if I will stop all of them. Then what will happen?
@@nikhilharane262
If the pressure vessels are properly designed it should be ok .
When you refer to stopping them you talk about heating or the pumps ?
I am talking about stopping flow from them. At that time the system Pressure will get increase?
@@nikhilharane262
Nope
You have flow and return
The flow will equalise with the return
It should not happen anything
Could you send me any video/ drawing for showing the connection between expansion tank, pressurization unit and air separator along with all safety and automation.
Dear Sir
I have more videos about pressurisation units and boiler systems .
If you will scroll trough my videos you will find more information .
I did not really targeted expansion tanks systems as they are too simple .
If you will dean with vented systems that imply expansion tanks make sure the tanks will be fitted at a reasonable hight so there will be enough pressure in to the system
Send me your e mail to see what can I do .
#sir please one video make on hvac compressor part winding cannection
Prithwish Dey
I shall make for both
Star Delta and Part Winding
Thanks sir
dear sir
Part winding connection is simple and there are a lot of video about it .If you really want one I ll do it with pleasure but there are a lot of very good ones .I can help you with some explanations if you need some guidance .
Bitzer compressor contractors are take ranning amps 50,50 either 60,40 in part winding. How do it happen? and how will know actual ranning amps?
What for reson when chiller start at first unloading start/open, then compressor running....?