Unformatted text preview: Pump#1 circulating pump O:003/01 relay #1 GV1 gas valve O:003/02 pilot light alarm horn Operating Sequence: Pump#1 is activated when the program is put in the run mode and operates continuously. If the room temperature drops below 21 C and the flow switch is closed, the gas valve is activated. If the boiler pressure exceeds 750kPa or the water temperature exceeds 45 C, the gas valve deactivates. A horn also sounds if the pressure exceeds 750kPa. When the pressure returns to normal, the horn stops. Write and test a ladder logic program for the operating sequence given. Demonstrate the program to the instructor. R. Khan Nov. 2009...
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This note was uploaded on 03/21/2012 for the course EE 369 taught by Professor Khan during the Fall '10 term at Mohawk College.
- Fall '10