Pentair 521218 Load Center IntelliChlor SCG Surge Board PCBA — EasyTouch & IntelliTouch — Genuine OEM
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The Pentair 521218 Load Center IntelliChlor SCG Surge Board is the genuine OEM printed circuit board assembly that manages power to the IntelliChlor salt chlorine generator inside an EasyTouch or IntelliTouch load center. It also provides surge protection for the chlorination circuit.
Key Features
- Genuine Pentair OEM: Look for the Pentair logo on the board — aftermarket copies of this part are common.
- Powers the salt cell circuit: Controls IntelliChlor SCG operation from within the load center.
- Surge protection: Guards the chlorination circuit against electrical surges.
- New-style load center: The post-change-date board for current EasyTouch PL4/PSL4 and IntelliTouch systems.
- Direct replacement: Matches original equipment specification for a straightforward swap.
Specifications
- Part Number: 521218
- Type: IntelliChlor SCG surge board PCBA
- Fits: Pentair EasyTouch and EasyTouch PL4/PSL4 control systems; IntelliTouch automation systems; IntelliChlor i5+3 new-style load centers
- Board Marking: The PCB itself is often printed 521593 — see FAQ below
- Cross-reference: 521593, 902175, 9237-192, COM-30-1218
- UPC: 788379849245
- Brand: Pentair (Genuine OEM)
Frequently Asked Questions
My board says 521593, not 521218. Is this the right part?
Yes. This is a common source of confusion — the box is labelled 521218 while the board itself is printed 521593. They are the same component.
Will this work in an IntelliCenter?
The surge card used in IntelliCenter, EasyTouch and IntelliTouch load centers is functionally the same and generally interchangeable. Do not confuse it with the surge card in the standalone IntelliChlor Power Center, which is a different shape and size.
What are the symptoms of a failing surge board?
Typical signs are the salt cell not generating, intermittent chlorinator operation, or visible yellowing and heat discolouration around the transformer feed on the board.
Should I check anything else at the same time?
Yes. A surge board that has overheated has often been affected by a failing transformer. Inspect the load center transformer while the panel is open.
Who should install it?
A qualified pool technician or licensed electrician. The load center carries line voltage and must be isolated before the door is opened.
Frequently asked questions
How many gallons is this salt system rated for?
The gallon rating is part of the model designation and is listed in the specification section above. Sizing up is normal practice: a cell rated above your pool volume runs fewer hours to hold the same chlorine level and generally lasts longer than one running at its limit.
What is the part number for this salt cell?
Pentair lists this salt cell under part number 521218. Quote 521218 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
How long does a salt chlorinator cell last?
Cell life is measured in operating hours rather than calendar years, and most residential cells give several seasons of service. Life is shortened by high cyanuric acid, low water temperature operation, scale buildup on the plates, and running the cell at a high output percentage for long periods.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
Do I need a matching power supply or control unit?
A cell and its power centre are matched as a pair; a cell will not generate chlorine on a power supply it was not designed for. Check whether this listing is the cell only, the power supply only, or a complete system before ordering.
Is there a warranty on this salt cell?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.