CONSTRUCTION FEATURES
• Compressor: scroll type, rotary, hermetic complete with thermal protection and casing heater.
• 2 capacity steps with high efficiency at part loads.
• Main and secondary heat exchangers: crossed flow stainless steel plate exchangers, complete with antifreeze heater, closed cell polyurethane foam rubber insulation and water flow differential pressure switch.
• Air side heat exchanger: finned coil with copper pipes and aluminium fins.
• Fan: external rotor axial type electric fans equipped with internal thermal protection and accident protection grilles. The electric fans, based on the sizes, are EC fans or fitted with a proportional electronic device for continuous adjustment of the rotation speed.
• Control: microprocessor electronic control with Adaptive Function Plus logic.
• Structure: made of galvanised and painted steel plate with polyester powder coating.
• The unit is also complete with:
– compressor and fan circuit breaker switches;
– electronic expansion valve;
– display of cooling circuit high/low pressure;
– master/slave control up to 4 units in parallel;
– clock board;
– control of Variable Primary Flow (VPF_R).
VERSIONS
• T – High efficiency version.
• Q – Super silenced version complete with compressor technical compartment soundproofing and reduced speed fans.
MODELS
• TXAETU: EXPsystems unit.
• TXAEQU: super silenced EXPsystems unit.
FACTORY FITTED ACCESSORIES
• PUMP with single or double electric pump, one of which automatic in standby. The electric pumps are available in the low or high head versions.
• TANK&PUMP with 230 – 440 litre integrated buffer tank (depending on the sizes) and single or double electric pump, complete with expansion tank, air vent valves, safety valve and water side pressure gauge.
• Inverter pump control for unit start-up.
• Desuperheater.
• Condensing control with fans with EC motor (standard in sizes 270-295).
• Condensing control with over-pressure fans (T version only)
• Power factor correction capacitors (cosφ > 0.94).
• Forced limit of power consumption.
• Forced noise limit.
• Energy parameter measuring device.
• Soft starter.
• Compressor technical compartment soundproofing.
• Compressor soundproof enclosures.
• Cooling circuit delivery valves.
• Refrigerant leak detector.
• Gas control and refrigerant leak detector (leak detector plus).
• Cooling circuit high and low pressure gauges.
• Double safety valves.
• Metal filters or coil protection nets.
• Copper/copper or copper/pre-painted aluminium coils.
• Control of min/max power supply voltage.
• Digital input for double set-point.
• 4-20 mA analogue signal for shifting set-point.
• Electrical panel resistance, base, buffer tank and electric pumps if any.
• Interfaces for serial communication with other devices.
• Colour touch user keypad (fitted on the machine or remotely) with 7” display.
• Rubber anti-vibration mounts.
SEPARATELY SUPPLIED ACCESSORIES
• Remote keypad with display.
• Thermostat with display.
• Rhoss supervisors for unit monitoring and remote management.
• Rhoss sequencer for integrated management of multiple chillers.
