Potterton 18kW System PCB Kit 7692720. Part No.7692720. Superseded Part No.5122458. Potterton Gold 18 HE A System (GC No. 41-592-15). Potterton Gold System ErP 18 (GC No. 41-592-39). Potterton Promax 18 HE Plus A System (GC No. 41-592-02).
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