VLS/VLH/VLR 524 to 1204 NEW Air Cooled Water Chillers Cooling Only, Heat Pump and Total Heat Recovery Engineering Data Manual

Key Points  Units with R410A refrigerant (it will be the real replacement of R22). As near azeotropic mixture it behaves like a homogeneous substance (reduced service problems in case of leakage or re-charge) with negligible temperature glide.  Special version (SIF) for high external static pressure (max. 120 Pa) with inverter fans (electronic brushless type motor). Axial fan  Refrigerant with superior thermo-dynamical proprieties compared to R22 and R407C, it allows to have more efficiency or compact and lighter systems and larger operating limits (T ambient = -10 °C in heating mode).  Modified...

Specifications (continued) Cabinet and structure The unit cabinet and structure are made of heavy gauge galvanized steel coated with polyester powder based painting (RAL 9001). All parts of the structure are fastened totally with non-corrosive screws and bolts. Compressors Each unit is equipped with four compressors arranged in two tandems to suit the two refrigerant circuits. The compressors are of hermetic scroll type and fitted with an electronic control system ensuring protection against high temperature and excessive load. All compressors have direct-on-line starting and are mounted on rubber...

^ Management of the electronic expansion valves by means of EXV controller allowing optimized functions: cooling, heating, start-up and defrost. ^ Management of external interlocks. ^ Management of the remote control: d) Unit power on/off e) Summary alarm signals ^ Remote signalling, by dry contacts: i) Alarm, circuit 2 ^ Management of the hydro kit: start-up of pump, antifreeze heater of external tank. ^ Management of the heat recovery mode by means of inlet water temperature sensor at the heat recovery condenser. The unit controller can also clearly show all control parameters of the machine on...

- Safety valve, - Automatic air vent valve, - Thermal insulation for pipes and water pump(s), - Electrical box, - Antifreeze electric heater inside buffer tank (electric heater for pipes is not supplied). This hydro kit with 500 litres tank and above components, all located in a metallic cabinet, is fitted on the back of the unit; which implies an increase in unit length of about 900 mm. Factory installed options 3 ModBus protocol kit for BMS. 3 Lonwork protocol kit for BMS. 3 Bacnet protocol kit for BMS. 3 Compressors soft starter. 3 Pressure actuated stepless fan speed controller for low ambient...

SAFETY / CONTROL DEVICES

SAFETY / CONTROL DEVICES

Air entering temperature Cooling - LN/ELN EXternal Standard fans static pressure special inverter fans Recommended system chilled water volume (2) Minimum capacity step Power supply voltage (4) (1) Total unit flow rate and pressure are given for BLN units. Caution: Minimum flow rates may only be used with brine solutions after reprogramming the unit parameters. (2) Minimum water/brine volume of system (about 3 litres/kW). (3) High pressure switch at 40.5 bar. Air entering temperature Cooling - LN/ELN EXternal Standard fans static pressure Special inverter fans Pa Pa Recommended system...

Water outlet Cooling - BLN Ambient ai Air entering temperature Cooling - LN/ELN EXternal Standard fans static pressure Special inverter fans Recommended system chilled water volume (2) Minimum capacity step Power supply voltage (4) (1) Total unit flow rate and pressure are given for BLN units. Caution: Minimum flow rates may only be used with brine solutions after reprogramming the unit parameters. (2) Minimum water/brine volume of system (about 3 litres/kW). (3) Max. leaving water temperature = 40 °C at -10 °C in fully loaded conditions and leaving water temperature = 45 °C in part loaded...

The minimum system water volume is calculated using the minimum compressor running time (1.5 minute for scroll compressor) and the lower capacity step (only one compressor running among the four compressors installed): Water volume (litre) Unit total cooling capacity (W) Number of compressor steps Compressor minimum running time (minute) Evaporator temperature difference (°C) With t = 1.5 minute, AT = 5 °C and n = 4, the minimum system water volume is about V = 3 litres/kW.

(1) Data based on 7 °C leaving chilled water temperature and 35 °C ambient air temperature. (3) Sound levels are at fully loaded conditions. Sound power level values refer to ISO standard 3744 and Eurovent 8/1. (4) Sound pressure levels refer to ISO standard 3744, parallelepiped shape. (*) High efficiency units (HSE) with inverter fans. (**) SIF units with high static pressure fans.

(1) Data based on 7 °C leaving chilled water temperature and 35 °C ambient air temperature. (3) Sound levels are at fully loaded conditions. Sound power level values refer to ISO standard 3744 and Eurovent 8/1. (4) Sound pressure levels refer to ISO standard 3744, parallelepiped shape. (*) High efficiency units (HSE) with inverter fans.

(1) Data based on 7 °C leaving chilled water temperature and 35 °C ambient air temperature. (3) Sound levels are at fully loaded conditions. Sound power level values refer to ISO standard 3744 and Eurovent 8/1. (4) Sound pressure levels refer to ISO standard 3744, parallelepiped shape. (*) High efficiency units (HSE) with inverter fans.

(1) Data based on 7 °C leaving chilled water temperature and 35 °C ambient air temperature. (3) Sound levels are at fully loaded conditions. Sound power level values refer to ISO standard 3744 and Eurovent 8/1. (4) Sound pressure levels refer to ISO standard 3744, parallelepiped shape. (*) High temperature units (HT) with inverter fans.

(1) Data based on 7 °C leaving chilled water temperature and 35 °C ambient air temperature. (2) Data based on 45 °C leaving hot water temperature and 7 °C ambient air temperature with 88 % relative humidity. (4) Sound levels are at fully loaded conditions. Sound power level values refer to ISO standard 3744 and Eurovent 8/1. (5) Sound pressure level values refer to ISO standard 3744, parallelepiped shape. (*) High efficiency units (HSE) with inverter fans. (**) SIF units with high static pressure fans.