Green Pool (Was black at first)

[like2ct]

Cool,

I ordered the items specified. Looks like the process is pretty straight forward (watched some video's). Should be able to do it next Saturday.

Pool is clear. Weather is too bad to do some measurements.

Thanks again,
Ernst

[PoolDoc]

Please let me know how it goes.

Thanks!

[like2ct]

Installed today the following items:

Pentair 355003S 1 HP 2 spd Square Flange Motor for SuperFlo Pump
Pentair 355067 1 HP impeller
Pentair 355617 1 HP diffuser
Replaced seal plate seal, "rotating" seal, seal plat o-ring, quad ring. The seal set came with clear instructions so that helped.

As expected it was pretty straightforward. The not so clear part is the wiring for the two speed motor as the diagram on the side of the motor was not readable.

One of the hot wires goes to connection numbered with 1 and the second hot wire is wired directly to the black wire of the speed switch (240V connection). I just used a wire nut to make the connection to the switch.

The ground wire goes under the green nut. I did bench test it (up side down bucket) and it ran in both speeds before mounting it in the pump housing.

Here some pictures of the install:

Wiring of motor

Seal plate with new seal

Rotating portion of seal

Impeller

Diffuser

Pump housing

Finished result

Running now 22psi

Motor is warm to the touch, so no longer boiling hot as the old one (I measured 225F on the old one).

Priming the system went smooth. Looks like pump has difficulty running at low speed and doesn't look like it will prime itself at that speed. I am not planning to use the low speed.

Home Depot had a 240V mechanical timer on sale ($15.00) so I picked one up and plan to install that later on this week.

Pressure went down to 22psi (Old motor 2HP with matching impeller/diffuser ran 30psi).

Still have to check the sand filter sand level. Pool water is currently crystal clear but FC is still high (>10ppm).

Turned on the heater as the kids are starting to get impatient.

Thanks for all the advice. Will do tomorrow some accurate measurement to see where I am at.

Ernst

[PoolDoc]

Thanks so much for the follow-up.

I'm looking forward to seeing the end results!

Normally, you don't prime on low -- in fact I don't believe any of the pumps are capable of priming on low. In most applications where I've run 2 speed pumps, the pump runs on low 24/7, unless vacuuming, backwashing, or under heavy load.

If you want to be able to toggle the pump on and off, you have to start the pump on high, and then switch to low. Intermatic has some ganged timers that allow that. Another method is to install a high quality check valve within a few feet of the pump on the suction side, to prevent prime loss.

Something to keep in mind is that sand filter performance actually increases as flow rates decrease, so running the pump on low 24 hours uses less electricity than high for 8 hours AND filters better. Depending on your weather and debris loading (here, the June forecast is hot & humid with afternoon thundershowers dumping leaves and debris into your pool!), you may need high speed, say from 6 - 9 pm, to drag surface goop and leaves into the skimmer.

[like2ct]

You talked me out of the timer and some work thanks

Just posted my numbers. Water is crystal clear and my numbers are getting better and better. I am still "recovering" from the Dichlor CYA increase exercise so no chemicals added. Pump is running 24/7 on low speed.

Today first day that the kids used the pool (no green hair or bleached swimwear).

FC 9.73 with ColorQ (measured this morning around 9:00am FC of 11 with K2006).
PH 7.5
ALY 141 with ColorQ and 130 with K2006
CH 185
CYA 51

Will do an early morning measurement to check my FC.

Thanks Ernst.

[PoolDoc]

Great!