Hello, and welcome to Manitowoc Ice service training center, here in Manitowoc, Wisconsin. My name is Jonathan, and today we're going to show you how to remove an ice machine from service and winterize it. We're going to look at 2 ice machines today, an IYT0450A air-cooled ice machine and an IYT0450W water-cooled ice machine. The water-cooled ice machine winterization instructions will be a little more in-depth than the air-cooled instructions. Please note, these instructions are intended for use by trained ice machine technicians. For safety, you can find more detailed information in your installation, operation, and maintenance manual that comes with the ice machine, or you can download a copy of this from our website, www.manitowocice.com. The following procedure is for all Indigo NXT models, including water-cooled ice machines. Prior to removing an ice machine from service and winterization, it's important to clean and sanitize the ice machine as discussed in the detailed cleaning and sanitation video, as well as the installation, use, and care manual. After cleaning and sanitizing the ice machine, insure the ice machine is turned off. Turn off the water supply, disconnect the incoming ice-making water line - marked as "in" - and the ice-making drain line - marked as "out" - at the rear of the ice machine. Don't forget about draining the water trough by removing it. The ice machine should still be energized, so navigate to the enable or relay screen in the service menu by pressing "menu", "service", "diagnostics", "control board", and then press "enable all relays". This is to energize and open the water inlet and dump valve. Blow compressed air or dry nitrogen in both incoming water and drain openings at the rear of the ice machine to remove all water from the lines. It's recommended to use 50 PSI air pressure, or nitrogen, and not to exceed 80 PSI. For water-cooled models, you'll need to blow out the water from the condensing coils. Water-cooled condenser models use water to cool the refrigeration system, a tube-in-tube heat transfer. If the ice machine is exposed to below-freezing temperatures with water in the condenser, it could lead to rupturing the refrigeration lines and system contamination. It's very important that you blow compressed air through the condenser until no water remains. Damage to the condenser from freezing temperatures is not covered under warranty. Disconnect the incoming water and drain lines for the water-cooled condenser. Start the ice machine in the ice making mode and wait for the freeze cycle to begin. This will take approximately 3 minutes. The increasing pressure will open the water regulator valve, and you may see water start to come out of the condenser connections. This is a sign that the regulating valve is opening. At this point, take your compressed air or dry nitrogen and start putting pressure through the condenser until no water remains. As soon as all the water has stopped coming out, turn off the machine immediately so that the machine does not trip out on a high pressure situation. Next, disconnect the electrical power and perform a lockout-tagout procedure. Then, replace all the panels. And there you have it: removal from service and winterization procedure is complete. Hope to see you again soon in one of our informative videos or webcasts here from Manitowoc, Wisonsin. See you soon!
