Accorroni HPE 018, Техническое руководство, Страница: 4 / 35

RG66004288-09
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5
2 CONSTRUCTIVE FEATURES
STRUCTURE
Galvanised sheet steel structure treated with a polyester powder
coating (Ral9002) suitable for outdoor applications, for an at-
tractive look and effective resistance to corrosive agents.
Fastening devices are made of non-oxidizable materials, or car-
bon steel that has undergone surface-passivating treatments.
The compressor compartment is completely sealed and may be
accessed on 3 sides thanks to easy-to-remove panels that greatly
simplify maintenance and/or inspection.
On request acoustic insulation can reduce the unit noise
emissions
CUSTOMISED HYDRAULIC KIT
Ū high head pump made entirely of stainless steel, already
configured for use with mixtures of water and ethylene gly-
col up to 35% and provided with internal thermal protection.
Ū Expansion vessel
Ū Security valve
Ū Filling cock (included).
Ū automatic vent valve.
Ū Water differential pressure switch and outlet water tempera-
ture probe with anti-freeze thermostat function.
Ū Mechanical Y filter supplied as a standard feature on all mod-
els to protect the evaporator (included).
COOLING CIRCUIT
Ū Scroll compressors in tandem configuration or trio, with op-
tional acoustical insulation Frame 3 e 4). The levels of effi-
ciency, reliability and noise of such components are the state
of the art for the scroll compressor. .
Ū Brazed plate heat exchangers made of stainless steel and op-
timised for use with R410a.
Ū Finned block condenser with 8 mm copper piping and alu-
minium fins, characterised by ample heat exchange surfaces.
Ū Dehydrating filter.
Ū Flow indicator with humidity indicator.
Ū Thermostatic valve with external equalisation and integrat-
ed MOP function.
Ū Cycle reversing valve (only MPE h)
Ū Check valve (MPE h)
Ū liquid receiver (MPE h)
Ū high and low pressure switch
Ū Water safety valve
Ū Schrader valves for checks and/or maintenance
Ū Refrigerant pressure gauges (optional)
FAN DRIVE ASSEMBLY
Electric fan with 6/8-pole external rotor motor directly keyed to
the axial fan, with internal thermal protection on the windings,
complete with safety grille and dedicated supporting structure.
The fan is housed in a special compartment having a profile de-
signed to optimise ventilation.
The use of finned block heat exchangers with 8 mm diameter
pipes reduces pressure drops on the air side, thus significantly
improving the noise levels of the units.
The condensation control system continuously and automatical-
ly regulates the fan speed, further limiting the noise emissions
of the unit during nighttime operation and under partial load
conditions.
FINNED BLOCK HEAT EXCHANGER
Made of 8 mm diameter copper pipes and aluminium fins, gen-
erously sized.
The special engineering of the heat exchangers allows defrost
cycles to be carried out at maximum speed in the models with
heat pump operation, which brings clear benefits in terms of the
integrated efficiency of the whole cycle.
ELECTRONIC MICROPROCESSOR CONTROL
The electronic control enables the complete control of the MPE
unit. It can be easily accessed through a polycarbonate flap with
IP65 protection rating.
The self-adaptive logic enables the unit to operate even in
systems where the water content is low, without the use of an
inertial water storage reservoir. By reading the outdoor air tem-
perature, it can automatically change the setpoint to adapt it to
the outdoor load
The basic controller comes complete with the MODBuS protocol
and enablesan immediate connection to GaRDa networks.
Main functions:
Ū Control over the temperature of water entering the evapo-
rator.
Ū Control over the temperature of water entering the evapo-
rator. (
MPE H
)
Ū Control of fan speed (optional)