What new heater for me?

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ajw22 said:
No, if the instructions are followed in bypass about 80% of the water bypasses the heater and 20% lows through the heater.

The bypass let's you lower the RPM to get the same water flow. You need to lower the RPM to get the kwh benefit. I can run my system at 1400 RPM bypassed for the same flow as 1700 RPM flowing through the heater.
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RIght now it's bit easier to do something similar. Running at a 3000 rpm in heater mode, the pump draws about 1390 watts. When in bypass mode, the pump draws about 1470 watts. Bypass uses more watts? I think it's time for PB to replumb like the instructions say.
 
ride525 said:
Running at a 3000 rpm in heater mode, the pump draws about 1390 watts. When in bypass mode, the pump draws about 1470 watts.
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This is true.
If there is less head loss, the power should go up slightly. Your bypass has less head loss than the heater.
When the pump operates at a lower head, there’s less resistance or back pressure on the pump. This allows it to pump fluid at a higher flow rate (more volume per unit of time). Since centrifugal pumps are designed to consume more power as they move larger volumes of fluid, they end up using more energy at higher flow rates. According to affinity laws, the power absorbed by a centrifugal pump is proportional to the cube of the flow rate (one of the affinity laws). This means that even small increases in flow rate can lead to increases in power consumption. When the head is low, the flow rate is higher, and the energy required by the pump increases disproportionately.
@mas985 can explain it better.

In your example, you maintained 3000RPM. You are getting higher FLOW through the bypass than through the heater. To @ajw22 point, you should be able to reduce the RPMs in bypass and get the same FLOW rate as 3000RPM in heater mode.
 
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ride525 said:
RIght now it's bit easier to do something similar. Running at a 3000 rpm in heater mode, the pump draws about 1390 watts. When in bypass mode, the pump draws about 1470 watts. Bypass uses more watts? I think it's time for PB to replumb like the instructions say.
Click to expand...
Is your pump set for RPM or GPM?

Show us pictures of the display with heater running and in bypass.
 
PoolStored said:
This is true.
If there is less head loss, the power should go up slightly. Your bypass has less head loss than the heater.
When the pump operates at a lower head, there’s less resistance or back pressure on the pump. This allows it to pump fluid at a higher flow rate (more volume per unit of time). Since centrifugal pumps are designed to consume more power as they move larger volumes of fluid, they end up using more energy at higher flow rates. According to affinity laws, the power absorbed by a centrifugal pump is proportional to the cube of the flow rate (one of the affinity laws). This means that even small increases in flow rate can lead to increases in power consumption. When the head is low, the flow rate is higher, and the energy required by the pump increases disproportionately.
@mas985 can explain it better.

In your example, you maintained 3000RPM. You are getting higher FLOW through the bypass than through the heater. To @ajw22 point, you should be able to reduce the RPMs in bypass and get the same FLOW rate as 3000RPM in heater mode.
Click to expand...
This is counter-intuitive to what I would have thought. But my background is EE, and CS, and NOT CE flow rates. Wow, new suff every day.
Thanks you!
 
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ajw22 said:
Is your pump set for RPM or GPM?

Show us pictures of the display with heater running and in bypass.
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My Pentair pump is a VSP, and shows speed, I dont know that it shows GPM. Could I see flow on intellicenter?
I coud take pictures, but they would just show what I told you., ie runing at 3000 rpm, pump shows about 1470 watts in bypass mode, in heater mode 1390 watts. I do have a flow meter attached to the imput to the filter, but it's hard to get really accurate readings, it's analog , not digital.
 
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ride525 said:
My Pentair pump is a VSP, and show speed, I dont know that it shows GPM.
I coud take pictures, but they would just show what I told you., ie runing at 3000 rpm, pump shows about 1470 watts in bypass mode, in heater mode 1390 watts. I do have a flow meter attached to the imput to the filter, but it's hard to get really accurate readings, it's analog , not digital.
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You are being difficult instead of cooperative.

Among other things seeing the display can tell me what model pump you have.

So show me the display or tell me what model Pentair VS pump you have.
 
ride525 said:
I do have a flow meter attached to the imput to the filter, but it's hard to get really accurate readings, it's analog , not digital.
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Even with analog....run your pump at 3000RPM in Heater Mode and note the FLOW. Then, run in bypass, lowering your RPM until you have the same FLOW. Report results.
Maybe post a picture of your flow meter? Is it a flow-vis?
 
I will turn over the help on this thread to @PoolStored since he wants to wade in here and you don’t need both of us hammering at you.

Good luck.
 
ajw22 said:
You are being difficult instead of cooperative.

Among other things seeing the display can tell me what model pump you have.

So show me the display or tell me what model Pentair VS pump you have.
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Sorry to seem uncooperative. I have a new Intellicentrer, it's bee working just a couple of days, I last I looked at the pump it wasn't showing the original display, the pump now says " DISPLAY not active". I'll attach a picture or two. It's dark and I can do better when it's light out. My picture says it's a Intelliflo VS pump, same as in my signature. Sorry, the pictures are not showing up in photos, but there is no other info besides pump connected to Intellicter now says "DISPLAY not active." And the intellicenter identifies the pump as "Intelliflo VS". Let me know if mor info helpful. Looked up original purchase 7 years ago, pump identified as

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011018 Pentair IntelliFlo VS Variable Speed Pool Pump - 011018​
 

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ride525 said:
Sorry to seem uncooperative. I have a new Intellicentrer, it's bee working just a couple of days, I last I looked at the pump it wasn't showing the original display, the pump now says " DISPLAY not active". I'll attach a picture or two. It's dark and I can in the do better when it's light out. My picture says it's a Intelliflo VS pump, same as in my signature. Sorry, the pictures are not showing up in photos, but there is no other info besides pump connected to Intellicter now says "DISPLAY not active." And the intellicenter identifies the pump as "Intelliflo VS". Let me know if mor info helpful. Looked up original purchase 7 years ago, pump identified as

thumbnail image
011018 Pentair IntelliFlo VS Variable Speed Pool Pump - 011018​
Click to expand...
You have a VS (variable-speed), not a VSF (variable-speed, variable-flow) pump. With a variable-flow pump, or that setting, you set a certain GPM and the motor will continue to increase in speed to meet that number until a certain threshold is hit, then it goes into "alarm" mode until you restore flow by cleaning the filter most commonly. Certainly not needed in the vast majority of residential pools.
 
Put 011018 in your signature by your pump so we all know what you have.

How do you chlorinate your pool?

Do you have a SWG?
 
1poolman1 said:
You have a VS (variable-speed), not a VSF (variable-speed, variable-flow) pump. With a variable-flow pump, or that setting, you set a certain GPM and the motor will continue to increase in speed to meet that number until a certain threshold is hit, then it goes into "alarm" mode until you restore flow by cleaning the filter most commonly. Certainly not needed in the vast majority of residential pools.
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I am unfortunatlely aware of the difference. I'm had two pools in over 45 years. For the first one, I made the mistake (in my mind) of buying the VSF pump. I didn't like it as it gained speed when the filters got dirty. It's still running however, it's my son's home. When I moved seven years ago, I bought a VS pump. The pool service guy was let go (since I was now the pool guy), and the existing one speed pump, coincidently at the same time, was found taking in air, and was trash. Then, I installed a VS pump at my current home. I didn't realize that the model number made that much of a difference, when used to show the difference at VF or VS. Thanks.
 
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Show me your pump speed settings in your IntelliCenter.
 
Show me pictures of the heater bypass that was installed and the actuator positions when heating and when in bypass.
 
Also, show me picture your equipment pad.

I need to see if you have any flow dependent equipment other then your heater.
 
ride525 said:
First of all, it won't show GPM for me, right? Since I have a VS pump.
Click to expand...

Nope.

ride525 said:
Second I have not seen a page like this? It this from a computer logon? Right now I have intellicenter, and phone app. But could logon computer.
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Go to www. intellicenter2.com and use your Pentair login.

It is a much better UI for controlling and programming your IntelliCenter then the app in my opinion.
 

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