12 Aermec cod. 5806715_00 12.01
NRP 0200-0750
EN
5. DESCRIPTION OF COMPONENTS
5.1. COOLING CIRCUIT
SCROLL COMPRESSORS
Hermetic scroll rotary compressors. All compressors
come with casing resistance, electronic thermal
protection with centralised manual resetting and two-
pole electric motor.
COOLING/HEATING EXCHANGER SYSTEM SIDE
Braze welded AISI 316 steel plate heat exchanger,
insulated externally with closed cell neoprene anti-
condensation material. When the unit is not running,
it is protected against formation of ice inside by an
electric resistance.
5.1.1. WATER FEATURES
PH 6-8
Electric conductivity Less than 200 mV/cm (25°C)
Chloride ions Less than 50 ppm
Sulphuric acid ions Less than 50 ppm
Total iron Less than 0.3 ppm
Alkalinity M Less than 50 ppm
Total hardness Less than 50 ppm
Sulphur ions None
Ammonia ions None
Silicone ions Less than 30 ppm
DHW SIDE HEAT EXCHANGER 2 pipes)
HEATING SIDE SYSTEM 4 pipes)
Braze welded AISI 316 steel plate heat exchanger,
insulated externally with closed cell neoprene anti-
condensation material. When the unit is not running,
it is protected against formation of ice inside by an
electric resistance.
SOURCE SIDE HEAT EXCHANGER
Finned pack heat exchanger made with copper pipes
and aluminium fins adequately spaced to ensure better
heat exchange performance.
CYCLE REVERSING VALVE
4-way cycle reversing valve. Inverts the flow of
refrigerant gas.
LIQUID STORAGE TANK
(always passed by)
Compensates the difference in volume between finned
coil and plate exchanger, retaining excess liquid.
DEHYDRATOR FILTER
Hermetic-mechanical with cartridges made of ceramic
and hygroscopic material, able to withhold impurities
and any traces of humidity present in the cooling
circuit.
NON-RETURN VALVES
Allows one-way flow of the refrigerant.
THERMOSTATIC VALVES
Mechanical valves, with external equaliser positioned
at evaporator outlet, modulates the flow of gas to the
evaporator, depending on the heat load, in order to
ensure a correct heating level of the intake gas.
SOLENOID VALVES
The valve closes when the compressor switches off,
blocking the flow of refrigerant gas to the evaporator,
recovery and the coil.
INDICATOR FOR LIQUID
Used to check presence of humidity in cooling circuit.
5.2. STRUCTURE AND FANS
SUPPORT STRUCTURE
Structure made of hot-dipped galvanised steel sheets,
painted with polyester powders, built to guarantee
easy accessibility for service and maintenance.
STANDARD FANS
Axial fans with IP 54 degree of protection, external
rotor, helical blades, housed in nozzles, complete with
accident-prevention protective screen. 6-pole electric
motor with built-in circuit breaker.
LARGER FANS
(only for NRP sizes 0200 to 0350).
LARGER INVERTER FANS
(available only from size 0500 to 0750).
2-pipe system 4-pipe system
System Domestic hot water
Cooling side
Heat side
STANDARD HYDRAULIC CIRCUIT
Filter As per standard As per standard As per standard As per standard
Flow switch As per standard As per standard As per standard As per standard
Air vent valve As per standard As per standard As per standard As per standard
CONFIGURABLE HYDRAULIC CIRCUIT
VERSIONS WITH SYSTEM STORAGE TANK AND PUMPS (the more complete versions are described)
Expansion vessel
As per standard No As per standard No
System storage tank and pump/s As per standard No As per standard No
Unload As per standard No As per standard No
Safety valve as per standard No As per standard No
VERSIONS WITH PUMPS ONLY (the more complete versions are described)
Pump/s
As per standard As per standard As per standard As per standard
Expansion vessel
As per standard As per standard As per standard As per standard
Safety valve As per standard As per standard As per standard As per standard
Valvola di sicurezza di serie di serie di serie di serie
POSSIBLE CONFIGURATIONS BETWEEN HYDRONIC KITS
recovery hydronic unit
system hydronic unit
° R1R2R3R4
° ok ok ok ok ok
01 ok nd nd nd nd
02 ok nd nd nd nd
03 ok nd nd nd nd
04 ok nd nd nd nd
05 ok nd nd nd nd
06 ok nd nd nd nd
07 ok nd nd nd nd
08 ok nd nd nd nd
P1 ok ok ok ok ok
P2 ok ok ok ok ok
P3 ok ok ok ok ok
P4 ok ok ok ok ok
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