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The ICAD/ICS was on the liquid line between the HP receiver and LP receiver, it was set up to keep the level on the HP receiver to keep enough liquid in it to keep the oil cooling going. We opted out the EKC and added the regulator to our existing PLC program.Īfter all, all the EKC does is send a 4-20mA signal to the ICAD, and the PID regulator in the PLC does the same thing. Only problem i have had with the ICAD1200 was a couple of years ago. But continued to have problems for the next couple of days with the Surge Drum Fill Strategy! (This plant has no High Level overrides.) There are no pumps to run to drop the Liquid level in the drum and you cannot run the Comps to lower the level either. Which being on a bordello tower was a nightmare due to the minimal head above the plates and the large size of the comps.īy pulling of the saturated vapour too aggressively, a high level alarm (AKS41 Level probe) was being activated.īy generating heat exchange within the plates (Chilled water from factory at about 15c-20c by then) "Vesuvius" was being created within the drum and setting off the High Level Alarm/lockout.Īdd a slow acting PID within the controller and you have a High level being created, with a working level you cannot control. I had to nurse the plant back on from an elevated surge drum level. Trouble was when I was allowed to return from Muster over an hour later. Shutting down the 3.3Mwatt Ammonia Plant. This week whilst on a site, the site Fire Alarm was accidentally set off. Due to the surge drum being starved of Ammonia.Ĭontrols can be a real pain, even when setup correctly! Our particular issue this time was not over filling but the plant cycling out on Suction Control.
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Danfoss icad 600 software#
Some non critical applications don't and trip on software set within the EKC 347. We look after various sites using the ICAD /ICM system and some have ups back-up to drive the valve shut, when a power cut occurs. It will turn the valve so it will get you out of the Poo, should the need arise. (part no ends 181) and it turned out to be the larger type.īut if you hold it centrally, when you rotate it. Incidentally the magnet tool you mention Ranger comes in 2 sizes. Some may remember my Plea for an SMV actuator? I fitted a ICAD 600 and ICM unit a couple of weeks ago! Basically we are going to suggest that the ICAD 1200 is changed, (got to start somewhere!)Īlthough it could be the EKC 347 controller?Īll settings check out and the level probe I think is a AKS 41?Ĭome to think! Ranger, don't you close the valve fully and then open 1 turn when setting them up? The issues have been going on for several weeks but are getting more and more frequent. The settings are factory reset and the valve recalibrates.
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Historically I have always assumed that when you interrupt the power supply. As I had to attend site earlier and used i26 setting to recalibrate the ICAD. I will let you know regarding the recalibration.
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So no power cuts, ICAD shows 100% but is actually closed? Well at least until the standing pressures have equalised then you have to create a HP /LP differential to further fill the drum. Once onsite the valve opening is shown as 100% open but is actually closed.īecause the refrigerant level in the receiver is high and opening the Liquid Line bypass.Īllows the refrigerant to flood into the surge drum. "Is a right Pain in the butt, Particularly if the plant room is on the ground floor and the control room is 1st floor! Resulting in long shutdowns before anyone on-site notices the chill room temps rising.Īs anyone will appreciate once emptied getting a large Ammonia plant away again is, Shall we say Said valve has started to randomly shut closed and the surge drum gradually empties.Ĭausing the plant to cycle off on it's suction Pressure control. With it's liquid level being metered by a ICAD /ICM Valve. A site (Un manned by Engineers) has a large surge drum on Ammonia.