York HVAC Catalogue 2018 EN 2019 EN | Page 40

YVFA Air-cooled VSD screw chiller with integrated Free-cooling Cooling capacities from 525 kW to 1575 kW At Eurovent Standard Conditions this equipment meets A Class energy efficiency levels. Compatible range Features Options / Accessories • Available in Open and Closed (glycol free) loop configurations. • O  ptimized Annual Energy Savings thanks to the unique combination of the YORK Variable Speed Drive technology expertise and the sophisticated free- cooling controls. • R  educed installation footprint, thanks to the integration of the free-coolingcoils together with the chiller. • L  ower ambient operating range when in free-cooling mode, compared to standard units. • BMS Interfacing options • Advanced Controls (Silent night TM , Quick restart) • Low temperature application options • Dual pressure relief valves • Flow switch • Epoxy treatment Microchannel Coils • Fan options • Enclosure options • Sound attenuation options • Anti-vibration mounts options • Desuperheater YVFA free-cooling chillers are available in open- or closed-loop configurations to maximize efficiency for your specific type od building Open-loop configuration Closed-loop configuration Open-loop design permits building glycol to flow through the free cooling coils directly, with the best performance and the lowest first cost. Closed-loop design integrates a brazed plate heat exchanger and pump loop. The building water loop is isolated from the free cooling coils, and the YVFA pump circulates glycol between the brazed plate heat exchanger and the free cooling coils. This provides the lowest pump pressure drop and a building loop that’s glycol-free. 40