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11 <br />111.5. ZENER SAFETY BARRIER WIRING (continued) <br />E <br />B. For Vapor -Only Channel: Use Model ZSB-2 Zener Safety Barrier. <br />ZSB-2 Connect <br />Terminal TO <br />1 Mother board terminal marked RED <br />Mother <br />:...a board terminal marke• <br />WHI <br />Ground buss terminal <br />Vapor • <br />*.. Vapors • <br />8 Vapor sensor BLACK <br />NOTE: Be sure to connect the special ground wire provided to the mother board terminal <br />marked Blue and the other end to the ground buss terminal. <br />C. For Vapor / Liquid Combination Channel: Use Model ZSB-2 Zener Safety Barrier. <br />ZSB-2 <br />Connect <br />Terminal <br />To <br />I <br />Mother board terminal marked RED <br />2 <br />Mother board terminal marked WHITE <br />3 <br />Mother board terminal marked BLUE <br />4 <br />Ground buss terminal <br />5 <br />Vapor sensor RED wire <br />6 <br />Vapor sensor WHITE wire <br />7 <br />Liquid sensor GREEN wire <br />8 <br />Liquid sensor BLACK wire and Vapor sensor BLACK wire <br />20 <br />