19MU3025Q0011 MCT-Chiller Controller Retrofit

Orientation : Embassy Muscat has two, Trane, 125 tons (cooling capacity) Compound, water cooled, helical rotary chillers. Except for a few weeks of extreme, 45 degree Celsius and above temperatures, one helical rotary chiller is enough to cool the Chancery and the Marine Security Guard Residence (MSGR) while the other chiller serves as a backup. The chillers were completely replaced in 2003, while the compressors only were replaced in 2020 and 2021. Thus, the controllers and appurtenant sensors on the chillers are 22 years old. B. Problem : The 22-year-old chiller controllers have no available replacement parts, and the various chipsets on the controllers have begun to fail. For instance, the stepper module chipset on Chiller Two failed, and a replacement was found in another country after searching for a few months. In that instance, the Embassy lacked backup cooling. Had Chiller One failed for any reason, the Embassy would have shut down. C. Required Work : The Trane certified vendor shall completely replace and integrally retrofit the entire control panel of both Chiller One and Chiller Two, including all appurtenant sensors. All chipsets shall be replaced. All sensors shall be replaced.