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Once a preset number of refills has been reached (25 refills over a 24-hour period is typical; 50 is the maximum), the integral color-screen display on the top-front side of the Mikrofill 3 will indicate a problem;\u003c/p>\u003cp >Larger leaks may, in fact, prevent proper replenishment. If the Mikrofill 3 does not detect the expected pressure increase over a preset period, the unit will shut down to prevent further water damage; and\u003c/p>\u003cp >In the case of catastrophic leaks, the Mikrofill 3 will quickly close off the main water supply to prevent further damage.\u003c/p>\u003ch4 >\u003cstrong >Peace of mind\u003c/strong>\u003c/h4>\u003cp >Dory quickly warmed to Buchanan’s offer to make the Mikrofill 3 an integral part of the Bryan boiler system. For one, Dory liked the idea of eliminating the pressure-reducing valve that had been used to maintain incoming water pressure from the municipality. \u003c/p>\u003cp >“The PRVs we use are spring-type valves that adjust by turning a screw on top,” he says. “The problem is, they are not as accurate as digital controls, which are the future of this business.”\u003c/p>\u003cp >Dory also welcomed eliminating the system’s old backflow preventer. “No more backflow preventer means the facility saves money by avoiding the cost of the required annual inspections.” \u003c/p>\u003cp >Most of all, he likes the peace of mind that Mikrofill’s system monitoring delivers by preventing a leak situation from getting badly out of hand: “The old-fashioned feeder system doesn’t pump much water, but it also never stops,” says Dory, explaining the fill process of the boiler system at Marian Village. \u003c/p>\u003cp >“If a leak starts after everyone in maintenance has gone home, the PRV will continue to feed the boiler through the night, which means the leaking will continue too. The PRV may sense a pressure drop, but that drop will just trigger the valve to keep feeding. It will have no clue there's a problem.”\u003c/p>\u003cp >Meanwhile, as the leak continues, all the attending costs are amplified, notes Dory. “The cost of the wasted boiler water, the cost of all the chemicals used to treat that water, and the cost of repairs and recovery from the flooding — it all goes up and up as time passes.”\u003c/p>\u003cp >The day of the installation of the Mikrofill 3, Buchanan was ready to actively assist. But that proved unnecessary. Installer Rich Friedman, vice president of service at Zentel Tech (Joliet, IL), had no serious problems connecting the unit, finishing in just “a few hours,” says Dory.\u003c/p>\u003cp >“The device is very simple: Two water lines, one in and one out, drainage and power. Not much to it,” he continues. “All Rich had to do was cut out the backflow preventer and the PRV, hook the water lines to the Mikrofill unit and hang the device on the wall. Fortunately, we had a 120-volt box hanging close by, right where we had planned to mount the device.”\u003c/p>\u003cp >Other than substituting a U.S. flex connector for a similar U.K. component shipped with the unit whose diameter didn’t fit into the Marian Village’s system, no other issues slowed Friedman’s successful completion of the install.\u003c/p>\u003ch4 >\u003cstrong >New mentality\u003c/strong>\u003c/h4>\u003cp >Beyond obtaining the necessary permissions from Marian Village management, Dory had no misgivings over the Mikrofill 3 technology and its newness to the American market. By way of explanation, he points to the ongoing, routine incidence of European innovation in hydronics: “New stuff comes from Europe all the time these days.”\u003c/p>\u003cp >Indeed, Dory and Marian Village are already planning their second installation of a Mikrofill 3, this time on the ALU’s rooftop chiller system, keeping it topped off with a 30% glycol solution for outdoor freeze protection. A break tank connected to the system stores and releases the glycol solution whenever system pressure drops below a preset level. Once installed, the Mikrofill 3 will be monitoring and managing that process, just as it currently does with the two boilers in the mechanical room four levels below.\u003c/p>\u003cp >To date, the latter system has continued to perform well, according to Dory. But it has taken a bit of time and a new mentality to fully appreciate the Mikrofill 3 and its essential role in a hydronic heating system.\u003c/p>\u003cp >Dory recalls a recent problem with a relief valve on one of the boilers, which led the new Mikrofill device to stop filling the system. “It sensed a leak somewhere. So, we found it and fixed it.” \u003c/p>\u003cp >But shortly after, the maintenance crew discovered yet another leak, this time in a grooved fitting. Once again the Mikrofill would not permit filling the boiler. The initial reaction was…frustration. The new device was somehow causing problems — “messing us up,” says Dory, by not allowing the system to be filled.\u003c/p>\u003cp >“So, I had to explain: Hey, the controller won’t let us fill the system because we have leaks. The controller is not the problem. 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