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Combustion 911
Supplying and Serving the Combustion Industry
an Olsträd Engineering Company

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Category Archives: FAQs

FAQ: VR Solenoid Valves for Air: Repair, Replacement Options

Q: I need to either replace or service some Kromschröder VR solenoid valves. Why don’t I see them listed on your website? A: Unfortunately, the T-Product (North American Market) version of the VR solenoid valve for air has been discontinued by the manufacturer, and is no longer available. However, the European Standard version is still Read More

FAQ: Connecting Electrode Adapters to Ignition Cable

Q: I’m having trouble getting a good connection on the barbed fittings in my TZI transformers and electrode boots. What is the best method to connect ignition cable to these items? A: The TZI Transformers and many of the Electrode Adapters offered by Elster Kromschröder use a barbed fitting, also called a “spearlock anchor,” to 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

FAQ: ValVario Valves

Q: One of my old VAS valves needs to be replaced. What’s the best way to order a new one? A: The VAS series of solenoid valves is part of the valVario family of products, designed to offer compact, modular solutions for industrial gas piping. If you are experiencing a failure with a VAS valve, Read More

FAQ: Ignition Electrodes for Pilot and Industrial Burners

Q: I need some new spark ignitors for my burners. Is that something that I can buy from Combustion 911? A: Combustion 911 carries stock of the components required to create ignition electrodes (also called “spark ignitors”) and ionization electrodes (also called “sense electrodes” or “flame-rods”) for a wide range of Elster Kromschröder pilot and Read More

FAQ: Electrode Adapters and Interference Suppression for Pilot and Industrial Burners

Q: I need to replace a few of the connectors that allow the ignition cable to interface with the spark plugs. Can you explain the differences between the various types you carry? Specifically, when should you use “interference suppressed” models? A: The electrode connectors you’re referring to are also typically called “electrode adapters,” “spark plug Read More

FAQ: Slow Opening (Dampened) Solenoid Valves

Q: What are the advantages to using a slow opening valve? I notice that it is an option for the VAS solenoid valves for gas. Are slow opening valves used for air, also? A: Slow opening solenoid valves (or “dampened” solenoid valves) are available for both gas and air control. VAS solenoid valves are manufactured Read More

FAQ: Elster Kromschröder Product Labels and Type Codes

Q: I have several Elster Kromschröder products in my facility, and it is extremely difficult for me to try to order spares from Combustion 911, because every time I call, the reps ask me for more information. I’ve been asked for photographs of the product labels, but I don’t have any idea what the strings Read More

FAQ: DL vs DG Pressure Switch

Q: I need to purchase a new pressure switch to monitor the pressure at my combustion blower. My setpoint is 18 “w.c., but when I called to order a DL 50AT, I was told that no stock was available, and that the wait could be up to five weeks. I can’t wait that long – Read More

FAQ: DG Pressure Switch T-Product vs European Standard

Q: I have a Kromschröder pressure switch, model DG 6U-3, which I do not find on your website. Can you quote this model? Do you have any stock available? A: Certain product families, like the VAS, DG, and IFS, are segregated into two branches: T-Product and European Standard. T-Product models are manufactured with the North Read More

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