Description
55137 Balboa ®2-Relay Extension Circuit Board | VS520Z / 525Z / 520Sz/BP2000G1
Balboa® 2-relay expander circuit board for 2nd pump used on VS520 Systems. This expander board is usually found on the following Balboa ® Control System models: VS520Z, 525Z, 520SZ, 520DZ, 523DZ. Includes 30 Amp fuse.
