RLA HE

This series of air-water chillers and heat pumps satisfies the cooling and heating requirements of residential plants of medium-large size.

All the units are suitable for outdoor installation and can be applied to fan coil plants, radiant floor plants and high efficiency radiators plants.

The refrigerant circuit, contained in a compartment protected from the air flow to simplify the maintenance operations, is equipped with scroll compressors mounted on damper supports, brazed plate heat exchanger, electronic expansion valve, reverse cycle valve, dehydrator filter, axial fans with safety protection grilles, finned coil made of copper pipes and aluminium louvered fins with subco- oling section.

The circuit is protected by a safety gas valve, high and low pressure switches and differential pressure switch on the plate heat exchanger. The plate heat exchanger and all the hydraulic pipes are thermally insulated in order to avoid condensate generation and to reduce thermal losses.

All the units can be equipped with variable speed fans control that allows the units to operate with low outdoor temperatures in cooling and high outdoor temperature in heating and permits to reduce noise emissions in such operating conditions.

The low noise acoustic setting up (AS) is obtained, starting from the base setting up (AB), reducing the rotational speed of the fans and mounting sound jackets on the compressors and the technical compartment is clad with soundproofing material of suitable thickness.

The eXtra low noise acoustic setting up (AX) is obtained, starting from the low noise setting up (AS), further reducing the rotational speed of the fans and using finned coil with bigger surface.

All the units are supplied with a management and control electrical panel containing general switch, phase presence and correct sequence controller, microprocessor controller with display and all the other electrical components with IP54 minimum protection degree.

All the units are accurately built and individually tested in the factory. Only electric and hydraulic connections are required for installation.

Options

Storing and pumping module available in the configurations:

• storage tank arranged as buffer on the flow or as primary-secondary buffer

• 1 or 2 pumps

• standard or high head pump Refrigerant circuit pressures visualization

• high and low pressure gauges

• high and low pressure transducers High temperature thermostat Compressor starting

• standard (contactors)

• soft starter Fans control

• on-off control

• modulating control (condensation / eva- poration control)

Compressor power factor correction Electrical load protection

• fuses

• thermal magnetic circuit breakers Coil condensate tray

Accessories

Rubber vibration dampers Spring vibration dampers Coil protection grilles

Tank antifreeze electrical heater Remote control

Modbus serial interface on RS485 Programmer clock

Phase sequence and voltage controller Water flow switch

Victaulic hydraulic fittings