The Balboa Circuit Board 55152 Serial Deluxe circuit board carries a chip number VS520DZR1B and is connected to 8-pin phone cable.

The Value Series (VS) family was created using Balboa's patented M7 temperature, water flow sensing technology and a brand-new universal control platform.

Note: Finding the appropriate PCB replacement requires knowing the chip number. Some look exactly the same but have different functionality. This is usually printed on a white label attached to the logic chip at the board's center.

Additional Information
Alternate Part Number - 55152-01