I have experience with steam boilers control. Send me a mail to the following address and i`ll see how can i help you.
"[email protected]", mailto:[email protected]
Hi! I had some experiences converting relay ladder ckt of dryer/kiln control, and hydraulic presses to plc using omron brands.
I really want to help you but i need some Info, like the relay diag, and the electrical power diag and some specs of the boiler you want to modify.
You have not written the exact plc on which u want to convert the relay logic, so pl. tell the PLC and the details of relay logic on following address. [email protected]
Go ahead, send me the control diagram or what you got now and what else extra you would like to get out of it. "[email protected]", mailto:[email protected]
Hi,
Good to hear that you want to go for the PLC control, send me the relay logic Ckt diagrams, i may be able to help. For further details writ to "[email protected]", mailto:[email protected] .
The previous advice re: NFPA gudelines
and failsafes is right on. But there is more.
Make sure (being new) that you start with clean updated, & correct schematics, a full understanding of how the boiler operates, and fully document and annotate your PLC program so that the next guy can understand it. What about an updated operating manual? Its all this stuff around it that makes for a good program.
Take care. You don't say where you are from, but in Britain it is against regulations to use some types of PLC for, say, lockout control. Ensure you stick to your local regulations
Don't forget to use a master trip relay logic separate from the PLC that will shut-down the boiler in case of flame failure, low water high furnace pressure etc.....