HMA-I

REFRIGERANT AND HYDRAULIC CIRCUIT:

both circuits are contained in a compartment protected from the air flow to simplify the maintenance operations and reduce to minimum the heat losses.

The refrigerant circuit is equipped with DC INVERTER motor driven compressor (scroll type) wrapped with sound-absorbing material and placed on vibration-damping rubber supports to reduce the vibrations and noise emissions.

The electronic management of the inverter also makes it possible to heat the compressor oil by using the inverter itself even in the compressor stop phases, avoiding the use of an oil cranckase heater.

The refrigerant circuit is made by copper pipes, stainless steel brazed plates heat exchanger complete with water differential pressure switch (for the control of the right water circulation), bi-flow electronic expansion valve, 4-way valve, axial fans with brushless DC motor complete with safety protection grilles, finned coil made of copper tubes and aluminium fins. The circuit is controlled by means of temperature probes and pressure transducers and protected by high pressure switch.

The plate heat exchanger and all the refrigeration and hydraulic circuit pipes are thermally insulated to prevent condensation and reduce heat loss.

All units are equipped with variable speed fan control that allows operation with low outdoor temperatures in cooling and high outdoor temperatures in heating.