Heat on demand Full INVERTER
R290 chillers
Glycol, water or brine chiller plants with reduced R290 load and Full INVERTER compressors.
- Description
- TECHNICAL SPECIFICATIONS
- OPTIONAL AND ACCESSORIES
- Dimensions
- Documentation
Description
Water-to-water chiller for commercial and industrial refrigeration applications with reduced R290 charge.
- Full INVERTER Technology
The Full INVERTER system provides precise control of the glycol supply temperature in response to varying cooling
demand. This system sequentially and simultaneously controls compressor capacity by varying motor speed from 30
to 70 Hz, minimizing start-stop cycles and delivering significant energy savings.
The compressors will always attempt to operate between their Minimum Optimal Speed (MOS) and Maximum Optimal Speed (XOS) unless they have already reached these limits and further capacity increase or reduction is required. Whenever they operate within this range, they achieve their maximum EER and therefore their highest efficiency.
Considering, as an example, three compressors with MOS = 20% and XOS = 80%, the activation/deactivation sequence follows the pattern shown in the graph.
- Hybridization with Renewable Technologies
The use of water-cooled condensing circuits enables greater integration with other thermal processes present in factories, commercial facilities, and industrial applications, such as heat recovery, geothermal systems, and hybridization with photovoltaic energy.
CONSTRUCTION
- Self-supporting casing made of galvanised steel sheet with polyester paint for outdoor use.
- Sealed electrical panel, independent from the refrigerated compartment.
REFRIGERATION CIRCUIT
- Semi-hermetic compressors with capacity control,unloaded start and crankcase heater and INVERTER drive on each compressor.
- Refrigeration circuits manufactured from annealed copper tubing with brazed joints, filter drier, ATEX highand low-pressure switches, pressure transducers, and temperature sensors.
- Copper-brazed stainless steel plate evaporator(s) with electronic expansion valve(s).
- Liquid solenoid valves and electronic expansion valves.
- Hot water inlet temperature between 10 °C and 50 °C.
HYDRAULIC CIRCUIT
- Cold water hydraulic circuit made of stainless steel pipe (≥DN100) or annealed copper tubing (<DN100), with filling/drain valve, air vent, electronic flow switch, inlet and outlet thermometers and pressure gauges.
- Hot water hydraulic circuit made of stainless steel pipe (≥DN100) or annealed copper tubing (<DN100), with filling/drain valve, air vent, electronic flow switch, inlet and outlet thermo-pressure gauges.
SECURITY
- ATEX fans for continuous ventilation of the refrigeration compartment.
- Leak detector with audible and visual alarm.
- Trip coil for disconnecting the power supply line to electrical components located in the refrigeration compartment.
- Safety valve on high- and low-pressure side for common piped discharge.
- Independent electrical supply for the extraction fan and leak detector, with residual-current and circuitbreaker protection.
ELECTRICAL PANEL AND CONTROL
- Programmable intarChiller electronic controller with refrigeration control and floating setpoint, pump control, external signal for Silence mode, alarm indicator light and audible leak detection indicator.
CONSTRUCTION
- Silentblocks for unit installation. (Accessory)
REFRIGERATION CIRCUIT
- Models available with Bitzer compressors (except 75 HP models).
- Shell-and-tube heat exchanger for evaporator and condenser (upon request).
ELECTRICAL PANEL AND CONTROL
- Voltage and phase failure control.
- Heat mode configuration, allowing operation according to the hot water circuit setpoint temperature.
- Spare programmed electronic controller. (Accessory)
