Pool Motor Overheating - High Amps

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captjake
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Pool Motor Overheating - High Amps

Postby captjake » Mon 30 Aug, 2010 19:59

PLEASE, PLEASE, PLEASE help me. I'm at my wits end.

Hayward Super II Pump
1hp Marathon motor running on 110V, 12.6A
C1200 filter

In short, motor under load is drawing 18-20A. Motor will run for a while, thermo will pop from overheating, cool, and then restart.

Called electric company. No known voltage drops. Wires into house checked. All tight.

Electrician called. Voltage drop at timer. New wire run from timer to motor. New 20A breaker installed at main panel. Voltage back to 118-122V. Motor was still drawing 20A. Electrician said the motor was bad.

New 1hp motor installed. Still does 18-20A under load when pumping water. 10-12A without load. New impeller, shaft seal, gaskets, etc. Good water flow, clean basket, no obstructions. I've replaced everything that can be replaced.

I'm out of ideas. What am I missing...??!!! Please help...!!!!!


greg340
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Pool Motor Overheating - High Amps

Postby greg340 » Mon 30 Aug, 2010 21:16

make sure you have the right impeller on it.
Twin State Pool Service
captjake
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Pool Motor Overheating - High Amps

Postby captjake » Mon 30 Aug, 2010 21:24

100% positive on the impeller. Confirmed with store and online.
Allen G Myerson

Pool Motor Overheating - High Amps

Postby Allen G Myerson » Mon 30 Aug, 2010 23:26

The motors come wired for 230 volts. Did you change to 115 volts?
Allen G Myerson

Pool Motor Overheating - High Amps

Postby Allen G Myerson » Mon 30 Aug, 2010 23:31

Also, what is the voltage at the terminals under load?
Allen G mYerson

Pool Motor Overheating - High Amps

Postby Allen G mYerson » Mon 30 Aug, 2010 23:39

If you're measuring the voltage with no load, then you could still get a good voltage reading even if the wires are bad. The problem won't show up until you put the wiring under load and then the voltage will drop way down.
Allen G Myerson

Pool Motor Overheating - High Amps

Postby Allen G Myerson » Tue 31 Aug, 2010 08:57

Try configuring the pump for 230 volts and connect it to a 230 volt supply to see what current the pump draws under load at 230 volts.
captjake
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Pool Motor Overheating - High Amps

Postby captjake » Tue 31 Aug, 2010 09:39

112V
20A

Under load at the motor.
captjake
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Pool Motor Overheating - High Amps

Postby captjake » Tue 31 Aug, 2010 19:31

Just did a bench test about 6 feet from the main breaker panel

118V
8.9 - 9.3A
Allen G Myerson

Pool Motor Overheating - High Amps

Postby Allen G Myerson » Tue 31 Aug, 2010 21:37

That's a lot of current draw for a motor that is not under load. The current under load is also too high.

Try switching to a 240-volt configuration and get enough wire to run two test wires from a 240-volt breaker to the pump to see what current it pulls under load at 240 volts. Use wire size # 12 AWG.

What is the pressure at the filter?

Perhaps your neutrals are bad.

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