Product Overview

Restore dependable UV-lamp operation in a compatible Pentair BioShield water-treatment system with the Pentair 523460 Ballast Assembly. This genuine Pentair replacement component supplies the controlled electrical power required to start and operate the system’s ultraviolet lamp.

The ballast is designed for compatible residential BioShield systems equipped with a flow switch. Its integrated connector communicates with the flow-switch circuit so the UV lamp can be shut down during a low-flow or no-flow condition. This helps protect the lamp, quartz sleeve, and UV vessel from excessive heat when water is not circulating.

Part 523460 is a multivoltage replacement ballast used with compatible 50-watt, 80-watt, and 120-watt BioShield UV systems. It replaces the ballast and attached connector assembly only. The UV lamp, quartz sleeve, flow switch, vessel, seals, and complete sanitation system are not included.

Key Features

• Genuine Pentair OEM replacement assembly
• Electronic ballast for compatible BioShield UV systems
• Includes the flow-switch connection
• Supports automatic no-flow lamp shutdown
• Compatible with multiple input voltages
• Designed for 50W, 80W, and 120W UV lamps
• Helps restore proper UV-lamp startup and operation
• Factory-installed cables and connectors
• Suitable for residential pool applications
• Direct replacement for Pentair part 523460
• Ballast assembly only
• Professional electrical installation recommended

Specifications

Compatibility

The 523460 ballast is intended for compatible BioShield systems using the flow-switch configuration, including:

• BioShield 522635 — 50W lamp and 25 GPM rating
• BioShield 522636 — 80W lamp and 45 GPM rating
• BioShield 522637 — 120W lamp and 62 GPM rating

It is not listed as the replacement ballast for the 150W BioShield 522638 system. Compatibility should be confirmed using the UV-system model number, lamp wattage, production revision, existing connector, and Pentair replacement-parts diagram.

Installation Information

Disconnect power to the UV system and circulation pump before servicing the ballast. Confirm that the UV lamp is completely off before opening or handling the system.

Inspect the existing lamp cable, flow-switch connector, wiring, receptacle, and mounting area for moisture, corrosion, heat damage, or damaged contacts. Connect the ballast cable and flow-switch connector by aligning the connector notch and securing the connection according to Pentair’s instructions.

The system must be connected to a properly grounded, GFCI-protected electrical circuit. Do not operate the UV lamp without adequate water flow, and never look directly at an operating ultraviolet lamp.

Installation should be completed by a qualified pool-service professional or electrician.

Package Contents

• One Pentair BioShield electronic ballast
• Factory-installed UV-lamp connection cable
• Factory-installed flow-switch connector
• Power-supply wiring supplied with the assembly

The UV lamp, quartz sleeve, flow switch, vessel, O-rings, mounting hardware, and complete BioShield system are not included.

Warranty Information

Pentair warranty coverage is subject to its current replacement-part terms, proof of purchase, correct compatibility, and proper installation. Damage caused by moisture intrusion, incorrect voltage, dry operation, damaged connectors, improper wiring, or unauthorized modification may not be covered.