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E(7, CPT Controller Manual <br /> c:j5F- For tandem operation, only one pump can be the master and only <br /> one pump can be the auxiliary. If both controllers are <br /> programmed as the master, the dispense-enable signal will turn <br /> on both pumps. <br /> cZe- For tandem operation, the pressure transducer wires and the <br /> dispense-enable wires must be attached on the master controller. <br /> On the auxiliary controller, these terminals must not be attached. <br /> Step 4: Slide the three-board assembly back into the CPT <br /> Controller. <br /> Step 5: Re-attach the ribbon cable. <br /> Step 6: Reinstall the cotter pin. <br /> WE The installer must reinstall the cotter pin. Failure to <br /> reinstall the cotter pin may allow shorts that result in <br /> severe personal injury, death, or substantial property <br /> damage, if ignored. <br /> Running and Attaching the Input Power <br /> The CPT Controller can operate with either 220-230VAC single- <br /> phase or 220-230VAC three-phase for the input power. <br /> IF the incoming power is: THEN: } <br /> 0 single-phase 0 three wires are required—one <br /> ground and two power wires. <br /> 0 three-phase 0 four wires are required—one <br /> ground and three power wires. <br /> See appendix B for wiring diagrams. <br /> Step 1: Pull three or four(see chart above) 14-gauge, THHN <br /> gasoline-, oil-, and water-resistant wires from the breaker panel to <br /> the CPT Controller. <br /> Chapter 3: Installation 3-6 ARE260-240 Rev.A ♦ 6/97 <br />