i-32V5H MIDI
Chiller and Inverter Air/Water heat pumps with axial fan
5
1. DESCRIPTION OF UNIT AND TECHNICAL SPECIFICATIONS
The heat pumps in this series were designed for residential and commercial applications. They are extremely versatile and are designed for
heat pump operation with hot water production for space heating and sanitary use at a temperature of 60°C. The use of the brushless inverter
compressor technology, combined with the electronic expansion valve, the circulator and the variable speed fan, optimise the consumption and
operating efficiency of the cooling components.
1.1
FRAMEWORK
Structure suitable for outdoor installation consisting of thick profiles made of hot galvanised sheet steel and painted with polyester powder, co-
lour RAL 7035 textured, resistant to atmospheric agents. The removable panels allow maintenance inside the refrigeration and hydraulic circuits.
1.2
COMPRESSORS
Twin rotary hermetic inverter controlled DC compressors, specifically designed to operate with R32, equipped with thermal protection and
mounted on rubber vibration dampers.
This component is installed in a compartment separate from the air flow to reduce noise and is equipped with a crankcase heater that prevents
the dilution of the oil by the refrigerant, ensuring correct lubrication and reducing wear on moving parts.
The compressors can be inspected by removing the side and front panels of the unit, allowing maintenance even when the unit is running.
1.3
AIR SIDE HEAT EXCHANGER
The air exchangers are made of copper tubes and aluminium fins.The pipes are mechanically expanded in the alluminium fins to increase the
heat exchange factor.The geometry of these exchangers allows a low value of pressure losses on the air side and therefore the possibility of using
fans with a low number of revolutions (with a consequent reduction in machine noise).
On request, the coils can have surface treatments to allow greater resistance to corrosion or be made entirely of copper with a brass structure.
1.4
UTILITY SIDE HEAT EXCHANGER
Brazed plate heat exchanger made of AISI 304 stainless steel, covered with black flexible closed-cell elastomeric foam; thickness 9 mm, thermal
conductivity (λ)≤0.036 W/mK (at air +20°C). A flow switch installed on the water side ensures the presence of water flow and, together with the
protection probe, prevents the formation of ice inside.
The exchanger can be equipped with an electric antifreeze heater (optional accessory KA1)
1.5
FAN
The fans are axial type with airfoil blades They are statically and dynamically balanced and supplied complete with protection grille and air inlet
and outlet with double flared profile, specially shaped to increase efficiency and reduce noise. The electric motor used is driven in modulation
with brushless EC motor, directly coupled, and equipped with integrated thermal protection. The motor has an IP 54 protection rating according
to CEI EN 60529.
1.6
COOLING CIRCUIT
The cooling circuit is made of copper piping, brazed and assembled in the factory in accordance with EN 13134.The components present are:
•
Filter drier with 100% molecular sieve cartridge;
•
Shut-off valve on the liquid line;
•
Liquid flow and moisture indicator;
•
Electronic expansive valve;
•
Charge connections;
•
High-pressure safety pressure switches;
•
High and low pressure transducers;
•
Reverse cycle valve;
•
Receiver and liquid separator.
The suction line is thermally insulated with flexible, closed-cell elastomeric foam.
Each unit is pressure tested to check for leaks and is supplied complete with a refrigerant charge optimised for operation.
