OptiChill™ & OptiChill™ FreeCool

Overview

OptiChill™ & OptiChill™ FreeCool include air-cooled screw chillers using R134a refrigerant; the OptiChill FreeCool is described as a large capacity, low energy R134a air-cooled screw chiller. Capacity ranges shown in the input are: OptiChill FreeCool 750 – 1365kW (intro), OptiChill Free Cool 750 – 1330kW (technical data), and OptiChill Screw Chiller 500 – 1140kW. Both product lines are listed with screw compressors and dual independent refrigeration circuits. Reported performance figures in the input include Free-cooling EERs of up to 75 and an ESEER of up to 3.44 during mechanical cooling; the technical table lists OptiChill Screw Chiller Max EER 3.19 and Max ESEER 4.21, and OptiChill Free Cool Max EER 3.12 and Max ESEER 3.48. The Features & Benefits section also cites "EER 3.21 ESEER up to 4.21." Documented product features include more than 95% free-cooling over a year (cumulative hours, London, UK), potential to save more than 50% of the energy consumed by a conventional chiller, an efficient shell and tube evaporator with freeze protection, large surface area condenser coils with enhanced tube and fin, two sizes of free-cooling coil (2 and 3 rows), electronic expansion valves (stated to increase ESEER by 30%), interactive head pressure setpoint management, economisers each with a dedicated EEV, 12.5°C increase in operational evaporating temperature range, Quiet and Extra Quiet ranges, and availability across over 200 models. Available options listed include a modem link for remote monitoring, leak detection system, corrosion-resistant condenser coils, coil guards, condenser fan air discharge plenum (two heights), anti-vibration mounts, and a low ambient kit for operation in ambients as low as -30°C. The input states the OptiChill FreeCool meets diverse cooling loads with a flexible, low sound cooling solution and provides extensive free-cooling capability: more than 95% free-cooling over a year and the ability to operate purely in free-cooling mode for up to 30% of the year. The product text also claims it can save more than 50% of the energy consumed by a conventional chiller and can achieve Free-cooling EERs of up to 75. The input explicitly notes units within this range are Ecodesign compliant for both process (SEPR) and comfort cooling (SSCEE) applications, indicating suitability for those application categories as stated in the source text.