i-32V5H MIDI
Chiller and Inverter Air/Water heat pumps with axial fan
9
2.3
DESCRIPTION OF ACCESSORIES
2.3.1 Factory-fitted accessories
Cu/Al battery with anti-corrosion treatment
finned pack heat exchanger with copper tubes and aluminium fins, treated with a special polyurethane-based paint for corrosion protection.
The treatment makes the coil flexible to resist thermal expansion and contraction, mechanically resistant, UV protected and dirt repellent. The
treatment guarantees protection of the batteries in practically all environmental conditions: from marine to rural environments, from industrial
to urban areas.
For specific cleaning instructions for batteries treated in this way, please refer to the chapter in the user-installer manual entitled "Cleaning of
finned batteries treated with the corrosion protection method".
The treatment resists 6000 h according to ASTM B117.
Electronic expansion valve
expansion valve, designed for the control and continuous regulation of the amount of refrigerant fed into the evaporator. Changes in thermal
load may be followed quickly, so as to achieve optimised consumption.
Electronic circulator
standard of the unit, electronically controlled and high effiency.
Water-side safety valve
Valve installed on the hydraulic circuit to control overpressure ola installata sul circuito idraulico per controllare le sovrapressioni – taratura 6 bar
Flow switch (flow signal)
device that controls and signals the circulation of water in the plate heat exchanger. This component is of fundamental importance because it
shuts down the unit and makes it safe by preventing the formation of ice.
Finned coil protection grids
metal mesh to prevent the intrusion of foreign bodies inside the coil and to protect the coil from accidental contact with things or people.
KA - Heat exchangers and crankcase heaters
electric resistance located on the front face of the plate heat exchanger, which is activated when the temperature of the water inside the ex-
changer falls below +4°C. For BT units this value must be set according to the percentage of glycol in the system and the freezing point of the
mixture. An electrical resistance is also placed on the base of the unit and is activated when the outside temperature falls below the set level.
Dry contact on/off remote
contact on the terminal board that allows the unit to be switched on and off.
Dynamic set point
the regulator allows the set-point to be modified by adding a value according to the temperature of the external air probe.
GI - Plant management module
allows the management of the following functions:
•
Compressor ON/OFF signalling
•
General alarm signalling/Machine block signalling
Three-phase relay for sequence/absence monitoring
signals the presence of all three phases in the correct sequence.
Three-phase relay for sequence/shortage moni min/max voltage detection
signals if all three phases are present in the correct sequence and if all three phase-to-phase voltages are within the set limits. The maximum and
minimum voltage thresholds can be set separately.
General circuit breaker
Overcurrent circuit breaker applied upstream of electrical components, protects components from failures caused by current peaks.
2.3.2
Accessories supplied separately
Y-Filter
contains a stainless steel mesh sieve (500 μm filtration) that collects solids in the water. Filtration prevents clogging and/or
damage to devices installed downstream of the filter.
sanitary storage remote probe*
temperature probe to be placed inside a thermal flywheel for the instantaneous production of domestic hot water. The DHW storage remote
probe thermoregulates the heat pump both during compressor start-up and shutdown.
The probe cannot be connected in the case of DS version
System storage remote probe*
system temperature probe to be positioned inside an external tank. The remote system probe thermoregulates the heat pump only during the
compressor start-up phase; shutdown is managed by the probe on the unit's delivery side.
