Balboa GS 502 replacement printed circuit board.1 or 2 speed pump WITH 24hr circulation pump, or 2 speed pump only. (circ pump will keep running even when more than 2 degrees above set point - Suits Xylem E-14 circulation pumps only in warmer climates/weather)
Blower or Pump 2 (jumper wire required if 2nd pump)
Can be used in place of GS501z circuit board when fitted with a 2 speed pump and blower.
can used in conjunction with a separate Expansion board (for circ pump and ozone with 2 degree cut out)
NB This is NOT a NAN502 replacement board used on Chinese spas - please call for assistance if you have a NAN502
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