VSF3 won’t stop priming

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BenTaylor

0
Apr 1, 2018
31
Grapevine, TX
Here in North Texas winter is coming again and tonight when the freeze protection mode kicked in on my Pentair VSF3 it wouldn’t stop priming. I could see water flowing in the basket and water was coming out of the bubblers in the pool. Filter pressure was about 20 psi which is normal for 100% speed. I checked all the skimmer baskets and they are clean. I lubed the o-ring on the pump basket. Nothing helped.

While looking at the dashboard on my phone, I noticed the estimated flow was showing 0.

I turned the power off for the night and drained the pumps and the filter.

The pump has been installed since last June. Even when the pump basket is full of water, the pump has always wanted to go into prime mode when the pump starts a scheduled run.

Looking for any suggestions you all might have.

Thanks,
Ben
 
TinFoilHat said:
All VSP pumps will prime when they start up. You might have a very hard o-ring from the cold temperatures.
Click to expand...
That makes sense, but this would run for 10 minutes before throwing the failure to prime error message and start another cycle then throw the same message and stop running.

It doesn’t make sense that pump was showing 0 estimated flow, when clearly water was flowing through the plumbing.
 
Note: The Signature says Pentair Intelliflow VST2.

Priming Features
The default priming setting is ENABLED.
The pump also allows you to set the following from the operator control panel:
• Priming speed
• Priming range (1-10)
• Priming delay

1739717811900.png

Disabling Priming with an Automation System.

When the IntelliFlo® 2 VST Variable Speed Pump is connected to an automation control system, (IntelliTouch®, EasyTouch® or SunTouch® Control Systems), the priming feature on the pump cannot be disabled by the external automation control system only.

It must also be disabled on the pump itself.

If priming is enabled on start up, the pump responds to its internal settings before responding to commands from an automation control system.

If the pump is connected to an automation control system and priming is not desired, disable the priming feature on both the pump and the automation control system.

To disable priming with an automation system:

1. Disable the priming feature on the automation control system at the load center or using an IntelliTouch or EasyTouch system remote.

(Refer to the automation control system user’s guide for additional information).

2. Temporarily disconnect the RS-485 communication cable.

3. Open the lid to the control panel to disable priming on the pump.

Press Menu, use the Arrow buttons to scroll and select “Priming”, then select “Disabled” (the factory default is set to “Enabled”). Press Back to exit the menu.

4. Once priming is disabled, reinstall the RS-485 communication cable.

 
Last edited:
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The only alerts I had was the failure to prime. I put all the drain plugs back in and filled the basket with water and everything came back on like it should. However, the priming mode the app was showing 0 GPM flow. Just as I was getting ready to take a screen shot, the priming stopped and the GPM started showing.
 
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I do not think the app ever shows GPM while priming.

GPM cannot be calculated until priming is complete and there is a steady flow
 
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