Applications Guide Tracer Graphical Programming - Trane
Applications Guide Tracer Graphical Programming - Trane Applications Guide Tracer Graphical Programming - Trane
® Chapter 5 Cooling tower with variable-speed fan example Figure 101: Adjusted pump start/stop module a e b c d Table 10: Pump start/stop module with successful start 10. See Table 10 and Table 11 to analyze the resulting logic for both a successful start and a failure to confirm flow. Run a b c d e Comments 1 F F F F F Initially, the Request is off, and the Status is off. 2 T F F F T The chiller plant calls for condenser water, Request is on. The pump starts, but flow is not confirmed yet. The Feedback Alarm delay counter begins its countdown. 3 T T T F T Flow status is confirmed. The Feedback Alarm delay countdown ceases and the pump remains on. Table 11: Pump start/stop module with failure to confirm flow Run a b c d e Comments 1 F F F F F Initially, the Request is off, and the Status is off. 2 T F F F T The chiller plant calls for condenser water, Request is on. The pump starts, but flow is not confirmed yet. The Feedback Alarm delay counter begins its countdown. 3 T T F T F Flow status is not confirmed. The Feedback Alarm delay expired, and its output changes to true, resulting in a pump failure. The pump is controlled off. 11. Compile and save your program to check for errors and to preserve your work (Figure 102 on page 101). 100 CNT-APG001-EN
® Writing the condenser water pump module Figure 102: Condenser water pump module completed Figure 103 is the cooling tower with variable-speed fan program. Figure 103: Complete cooling tower with variable-speed fan program CNT-APG001-EN 101
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- Page 130 and 131: ® Chapter 6 VAV AHU example Review
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®<br />
Writing the condenser water pump module<br />
Figure 102: Condenser water pump module completed<br />
Figure 103 is the cooling tower with variable-speed fan program.<br />
Figure 103: Complete cooling tower with variable-speed fan program<br />
CNT-APG001-EN 101
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