PrintAnswers to our most frequently asked questions on HPFi, iMPACT, iFLEX, iCS, and other Enginuity services.
HPFi
How long can I expect my high pressure fuel valves to last? HPFi fuel valves last an average of 13,000 operating hours. Your results may vary depending on your specific application.
Are there replacement options other than replacing my entire valve? Yes. Dresser-Rand Enginuity offers several options for bringing your system back to "like new" condition. Visit our Aftermarket Support page to find out more about our valve re manufacturing program.
Can I remove HPFi valves without disconnecting the electrical leads? Yes. However, Dresser-Rand Enginuity recommends that the valve and EHV be removed as a single unit for maintenance as the EHV armature is easily damaged resulting in additional costs of repair.
How do I know when a valve needs to be replaced? If you've noticed an increase in gas flow through the Gas Flow Indicator installed with your system it may be time to have one or more valves repaired or replaced. Individual valves needing replacement can be isolated using the techniques described in the HPFi Hydraulic manual.
What oil do I have to use in my HPFi hydraulic system? Only approved hydraulic oils (listed in the HPFi Hydraulic Manual) should be used to avoid damage to critical components throughout the system and fuel valves.
How often should I change the hydraulic oil in my HPFi system? Dresser-Rand Enginuity recommends changing the hydraulic oil annually. However, if the hydraulic oil becomes contaminated it should to be changed immediately to avoid damage.
Why does Dresser-Rand Enginuity use hydraulics to control its HPFi valves? Using hydraulics allows the injection event to be controlled in a very precise manner without extracting energy from the fuel itself. This results in better mixing, efficiency, and lower overall emissions with minimal trade offs in performance.
iMPACT
I'm getting an alarm that is keeping the unit from auto-balancing. What should I check to resolve it? Take a look at the HPFI and iMPACT manuals. Each manual has a troubleshooting section which identifies the alarms and several possible causes for those alarms.
I don't see any numbers coming across on my HMI. What could be wrong? Check to make sure that you don't have any communications alarms. If the communications has been interrupted in any of the critical links, then the HMI would not have data to display. Check to make sure that the Wonderware communications driver is running.
I can't communicate with the modules using iVIEW. What should I do? Check to make sure that the software is set up with the correct Module address. If this is correct, run the COMMSCAN program to see if the modules have been incorrectly set to the wrong address.
All my iBALANCE or iFLOW numbers are 0, but the engine is running. What's wrong? Check to make sure that the TDC signal is present to the modules. Also make sure that the polarity of the TDC signal is correct. It should move in a positive direction first then go negative as the TDC Pin goes by the probe.
I have gain alarms and Cold Compression Pressure errors and I have already verified that the sensor is calibrated correctly. What's next? You may have plugging in the Kiene valve which is causing the pressure signal to be attenuated to the sensor. Check to see if the pressure curve of the offending cylinder has a pronounced blow down after TDC.
iFLEX
How does the iFLEX system interface with other systems? The system communicates using the standard Modbus® protocol allowing both Serial (RS-485/232) and Ethernet communications standards.
Is a lap-top or computer interface required to change set-points? No. The iFLEX system comes with a touch-screen display. Set-points can be accessed and changed via the display.
Is tunable information (such as the set-points) protected? Yes! There are varying levels of password protection which will only allow authorized personnel to access and modify information in the system.
We have had trouble operating the engine as we would like due to our fuel supply having a varying BTU content. Is this something the iFLEX system could help us with? Yes! We have used meters to supply BTU values of the fuel to the iFLEX system. Using this input, the system is capable of adjusting the air/fuel ratio as required.
Does the iFLEX system provide purely air/fuel ratio control? No. The iFLEX system has been created with a stackable architecture allowing it to be built to customer specification. In addition to air/fuel ratio control, it can provide complete engine control (including starting, stopping, speed, loading, safety shutdowns) as well as compressor control and monitoring. For more information please refer to the iFLEX page on the website.
Is the iFLEX system capable of allowing us to increase its functionality in the future? Yes! The system is fully expandable allowing I/O and additional capabilities (control, monitoring) to be added as required.
iCS
What is iCS? The intelligent Compliance System, a low cost simple to install air-fuel ratio control.
What do I do if I think I have exhaust leaks? Check all exhaust components including turbocharger boot, expansion joint, flanges, sample ports. Crankcase ventilation can not be routed pre-catalyst!
I am experiencing ignition misfire, what should I check? Check magneto, ignition coils, wiring, spark plugs and firing order. A misfire may cause an apparent simultaneous rich/lean exhaust condition.
Can low compression cause problems in regard to my AFR control? Yes, Low compression will create unstable combustion resulting in high CO, in relation to 0.5% oxygen. Unstable combustion may also cause erratic swings in the EGO1/2 sensors.
How tight should my gasketing or sealing mechanism be around my catalyst? A blow-by rate of just 5% around the perimeter can increase the downstream CO by 250 ppm and NOx by 150 ppm. The gasket and sealing must be as close to 100% as possible.
What is catalyst masking? Catalyst masking occurs primarily from sulfated ash that is present in the lubrication oil. Accumulated ash on the catalyst surface reduces the activity of the catalyst. Catalysts require periodic chemical washing based on the observed increase in DP or decrease in DT.
What if my catalyst is damaged? Catalysts are susceptible to irreversible damage by over-temperature conditions or poisoning agents. They may require replacement of the element and in some cases the entire can.
How do I find the proper EGO3 target? The controller must be fine-tuned with an exhaust analyzer to determine the correct EGO3 target voltage.
How long will my EGO sensors last? The EGO sensor has an expected operating life of 2000 hours and must be replaced at regular intervals as part of your preventative maintenance schedule. Poor engine performance conditions can reduce the life of the EGO significantly.
Does the iCS have any on-board communications capability? The iCS has ModBus capability, there are 140 ModBus addresses available to monitor, chance are you will only need to monitor a few.
Will the iCS bring my engine into compliance in regard to the new MACT rule? As a stand-alone product the iCS will not, but as part of a complete system the iCS has proven to be one of the best products on the market.
Is the iCS available for both rich and lean burn applications? Yes, we have systems available to support most mid sized engine applications.
Does the iCS provide some type of communications link? The iCS has an on-board ModBus output.
Will the iCS control through the entire load range of my system? The iCS has been installed on many engines and controls through the entire load range.
Does Dresser-Rand Enginuity guarantee compliance using the iCS? The iCS is an air-fuel ratio control, the actual guarantee is provided through the catalyst manufacturer. Through the combined products, Dresser-Rand Enginuity does provide a compliance guarantee.
General Questions
I have an emergency and need after- hours support. Who can I call? Call (Int'l +1) 970-214-1691 for after hours support.
If I need a replacement for an Enginuity Products installed component, who do I call? Dresser-Rand Enginuity Product Services is the Aftermarket parts support team at Dresser-Rand Enginuity. We can help you with replacement of all your Enginuity Products installed components
Do you keep an inventory of all the items I will need in stock? We do our best to have a supply of the most common parts, but call us to check. We can typically get most parts to you within a few weeks, even if we don't have them in stock.
I'd like to have a Service Tech come to my facility to tune up my system, who do I call? Dresser-Rand Enginuity Product Services is the Aftermarket service support team at Dresser-Rand Enginuity. We can help you with all service support needs.
I sent a part back for repair, warranty or replacement, who do I call to find out the status of this part? Please call the Dresser-Rand Enginuity Products Services Administrator at (Int'l +1) 970-224-0170
If I send a part in for repair how long does it typically take to be completed? This will vary greatly depending on the item to be repaired but typically a repair is completed within 3-5 weeks, sooner if necessary but expedited charges may apply.
What information does Dresser-Rand Enginuity need from me when sending in items for repair? Specific contact information, part number, serial number, reason for return, etc. can be found on the RMA form.
What will it cost for my repair? We have standard costs for repair of some items, others are done on a T&M basis, call Dresser-Rand Enginuity to get further information.
I have a question but can't find the answer on the web or under FAQ, who do I call? You can call Dresser-Rand Enginuity at (Int'l +1) 970-224-0170. We will do our best to get your questions answered right away.
What is it that Dresser-Rand Enginuity does? We provide leading engine and compressor technologies to the midstream and pipeline industries throughout the United States.
Does Dresser-Rand Enginuity sell catalyst? Yes, our brand name is COMPLi, and is available in NSCR and Oxidation configuration. We also sell catalytic silencers.