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an Olsträd Engineering Company

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Tag Archives: pf-19 multi-burner control system

Elster Kromschröder PF-19: PFU & PFS

The 19” subrack system continues to be a popular and viable option for customers interested in mounting their burner controls on the control cabinet. Over the years, Elster Kromschröder has offered this style of solution in a few generations of product. In the beginning, every rack was wire-wrapped by hand, which added to the cost Read More

FAQ: Burner Control Units – Flame Signal Strength

Q: I’ve got a PF-19 flame safety system incorporating PFU 760 burner control cards, and I keep faulting-out. It seems to be due to loss of flame signal, but I can visually verify flame. How do I check the flame signal on my PFUs? What could be causing this problem? A: Elster Kromschröder burner controls Read More

Pulse-Fire 101 – Pulse-fire Implementation

Now that you’re familiar with the history, ideas, and benefits of pulse-fire, it’s time to look at implementation. Knowing what you do about the demands that pulse-firing exacts upon components, you want to make sure to get the most for your money, so you don’t wind-up spending your fuel savings on replacements. ValVario Kromschröder’s valVario Read More

Pulse-Fire 101 – Pulse-fire Equipment

Not all combustion equipment is suitable for pulse-firing. Some of the key equipment requirements for a successful pulse-fire installation include: operating cycles in excess of one million, capability of three cycles per minute, and repeatability. Solenoid Valve Operating Cycles In traditional, modulating systems, gas solenoids open during start-up and remain open during furnace operation. Unless Read More

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