Hayward super pump over-heating

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R

rchadha

Silver Supporter
May 2, 2022
35
Pittsburgh
Pool Size
19000
Surface
Vinyl
Chlorine
Liquid Chlorine
Hi all,
I have a Hayward Super Pump C48K2N143B1 and a waterway crystal water cartridge filter. The pump is overheating and shutting off. I can hear some air-gurgling noise. However, I don't see any air bubbles in the pump basket. I do have a leak on the pressure relief valve on the filter. I think it's a bad o-ring, which I plan to replace (or just see if needs more lube).
Do you think the leak on the filter, can cause an air leak in the pump and cause it to overheat?
Per my understanding, the air leak should be on the suction side (i.e. between the skimmer and the pump), for it to impact the pump. The pressure gauge on the filter reads 20PSI which it has always read. I use a robot so I don't vacuum using the pool pump.
Any tips on how I should troubleshoot the pump overheating will be much appreciated. Thank you!
 
You are correct. A suction leak would be before the pump. The gurgling is from the leak on the pressure side allowing air into the system. Probably that relief valve. That shouldn't be the reason for the pump overheating though. How old is this pump? Has it been making any odd sounds? Have you tried checking the pump's impeller area for anything that may be effecting easy rotation? With power OFF, reach down into the pump and with your fingertips try spinning the impeller.
 
Thanks @Texas Splash. The pump isn’t making odd sound. Date code is Aug 2015 and we have been owners since Oct 2021. No obstruction on impeller. I measured current on it and it’s pulling avg 13.3-13.6A which seems very high for 115V system I have. I think this high current is probably causing the overheating, but not sure why it’s pulling so much current
 
rchadha said:
but not sure why it’s pulling so much current
Click to expand...
I don't know if that could be related to the age of the motor and expected wear/drag on the bearings and/or windings. Looks like JamesW will try to enlighten us. :)
 
Motors use about 1,000 watts per 1 hp because it is the delivered hp and not the used hp.

13.6 is a little high and probably due to the excessive heat.

Make sure that the vents are not obstructed.

1657398702037.png

What is the voltage measured at the terminals while the pump is running?

The motor is probably dying.

I would downsize the impeller and motor.
 

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Assuming you are measuring surface temperature, in the shade, at air temperatures less than
90 F, I would give this as a rough guide:

Below 135 F, good
135 to 150 F, warm
Over 150 F, too hot.
 
Voltage measured is 116V at motor terminals. I agree it’s way too high! It’s drawing 1577W. Will look into replacing the motor. Why do you suggest downsizing?
 
You can switch to a variable speed motor.

Impeller...........Total HP required.
SPX2600C............0.60
SPX2605C............0.75
SPX2607C............1.10
SPX2610C............1.50
SPX2615C............2.00
 
The pressure seems a little bit high.

Has the filter been cleaned recently?

You might not be able to downsize because the heater might not get enough flow.

The heater needs a minimum of 25 gpm.

I would get a 1.1 hp motor and a SPX2605C impeller to see if it will work.

If there is not enough flow, you can switch back to the SPX2607C impeller, which is what should be in the pump.

Alternatively, you can get a 1.65 hp variable speed motor and a SPX2610C impeller and then you can dial in the exact speed.


1657401365477.png

Century (A.O. Smith) 1.65 HP Motor, V-Green, Round Flange 56J, Variable Speed, 208-230V - Model ECM16CU - INYOPools.com

V-Green 1.65 HP Round Flange 56J Variable Speed Motor - ECM16CU
www.inyopools.com www.inyopools.com

1657401656617.png
 
Hi @JamesW, the filter hasn't been cleaned recently, but even when it was cleaned, the pressure was similar. I will clean it again before the new motor as I also need to replace the air relief valve.
As far as the motor goes, I am thinking of going with this one- https://www.inyopools.com/Products/00200017001331.htm
This is the same one I have now. I can try with a smaller impeller, but is that ok to use? As the recommended HP for the SPX2605C is 0.75.
Is the objective of using a smaller impeller to reduce power consumption and motor wear?
Reg VS motor, I cannot use it as I only have 115V at the pool. All the Hayward pump VS/DS motors that I checked will need 208/230.
Thanks again for all the help! I have never changed a pump motor, but looking at the directions and some videos, I don't think it's too difficult.
 

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