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5

GENERAL CHARACTERISTICS

 

1 .4 

General description

The heat pump heaters 

R

 NexPro Plus use the thermal energy 

of the air to produce domestic hot water.

Ease of installation, noiseless and reliable operation and min-

imum maintenance requirements complete the advantages of 

this highly ecological and economical system.

The unit is suitable for indoor installation and uses as standard 

alternative energy source a 1.5 kW single-phase electric heating 

element. The accumulation tank is made of carbon steel, with 

internal 2-layer glazing, magnesium anode, internal coating in 

rigid plastic material (ABS).

1 .5 

Operating principle of the heat pump

The operating principle of the heat pump is the following:

 

− The refrigerating fluid changes its state in the evaporator 

(1)  taking  heat  from  the  low  temperature  source  (the 

external air).

 

− The compressor (2), that is the heart of the system, makes 

the energy level of the taken heat higher: in fact, the 

refrigerating  fluid,  by  increasing  its  pressure,  reaches 

temperatures near to 90°C.

 

− In the condenser (3)  it is possible to give thermal energy 

to the domestic hot water, warming it until 60°C.

 

− The  storage  tank  (4)  (300  litres)  allows  storing  up  and 

keeping for a long time the heat, thanks to insulating 

shell in polyurethane 50mm thick.

 

− Crossing in the end the expansion element (5), the fluid 

returns to low pressure, cools down and it is available 

to “load” other “ecological” heat again from external air.

 

− the  solenoid  valve  (6)  allows  to  equalize  pressures 

during the starting phase and, if necessary, allows the 

evaporator defrost.

1

2

3

4

5

6

Evaporator

2  Compressor

3  Condenser

4  Storage tank

5  Electronic expansion valve

6  Solenoid valve

1 .6 

Constructive characteristics

The main constructive features of the heat pump heaters 

R

 

NexPro Plus are:

 

− carbon steel tank with double-layer glazing

 

− capacitor externally wrapped to the accumulation 

tank free from limescale deposits and gas-water 

contamination

 

− auxiliary coil for the use in combination with boilers 

(

NexPro 300 CS Plus

) or solar panels (

NexPro 300 S Plus, 

NexPro 300 CS Plus

)

 

− NTC integrated probe for the control of water temperature.

 

− NTC outdoor temperature sensor for automatic insertion 

of the electrical heater with temperature not favourable 

to the heat pump.

 

− evaporating coil input/output NTC probes

 

− electronic thermostatic valve

 

− solenoid  valve  for  hot  gas  injection  and  pressure 

equalisation

 

− anti-corrosion magnesium anode

 

− hydraulic connections on the back side

 

− condensate drain integrated in the isolation

 

− hermal insulation with injected polyurethane with high 

thickness

 

− external coating in RAL 7001 grey plastic

 

− use of refrigerant gas R134A

 

− single phase 1.5 kW electrical heater

 

− safety devices for high pressure

 

− high efficiency rotary compressor

 

− variable speed radial fan

 

− support handles for easy and safe transport.

The management, fully electronic, is provided with:

 

− User interface for setting the operative mode and set the 

parameters with different levels of accessibility protected 

by password

 

− self-diagnosis and display of alarms (high pressure, high 

temperature of water, probes disconnected)

 

− storage of runtime and clock function

 

− water set-point adjustment for automatic and/or manual 

operation

 

− outdoor air temperature display

 

− modulating fan speed control

 

− dynamic set point function

 

− management of minimum time intervals between 

successive starts of the compressor

 

− remote ON/OFF for complete unit (timer)

 

− remote ON/OFF for electrical heater (energy twin rate)

 

− electrical heater management in manual or automatic 

integration mode with low outdoor temperature

 

− command to an external boiler as an alternative to the 

electric heating element

 

− insertion of the cyclic antibacterial treatment to eliminate 

and prevent the formation of legionella

 

− defrost management through hot gas by-pass.

Содержание NexPro Plus

Страница 1: ...cod Doc 0081361 rev 0 10 2016 NexPro Plus EN INSTALLATION AND MAINTENANCE MANUAL...

Страница 2: ...t Riello S p A CONFORMITY R NexPro Plus units comply with the European Directives Low Voltage Directive 2014 35 EU Electromagnetic Compatibility Directive 2014 30 EU Machinery Directive 2006 42 EC Dir...

Страница 3: ...he operating modes 14 3 6 List of parameters 15 3 6 1 Parameters of electronic board inputs outputs 15 3 6 2 User parameters Utt 15 3 6 3 Installer parameters 15 3 7 Navigation diagram 18 3 8 Automati...

Страница 4: ...to the unit sit on it and or rest any type of object on it 0 0It is prohibited to spray or jet water directly onto the unit 0 0It is prohibited to open the doors for accessing the internal parts of th...

Страница 5: ...ith double layer glazing capacitor externally wrapped to the accumulation tank free from limescale deposits and gas water contamination auxiliary coil for the use in combination with boilers NexPro 30...

Страница 6: ...700 W Absorbed power in stand by mode 43 W Efficiency Energy WH 5 124 Annual consumption AEC 5 826 kWh Daily consumption QELEC 5 4000 Wh Maximum power input 6 5 A Load profile L Energy class A Refrig...

Страница 7: ...nvolved For handling use depending on the weight appropriate means as required by Directive 2006 42 EC and subsequent amendments 9 9The machine covering cannot withstand significant stress therefore i...

Страница 8: ...n environment and free from obstructions Comply with all applicable laws in force in the country where the machine is installed as regards the use and disposal of the products used for machine cleanin...

Страница 9: ...F Probe well G Cold water 1 F L Anode 1 1 4 F M Electrical heater 1 1 4 F NexPro 300 S Plus 1415 1242 800 845 1040 800 330 168 A M L E F G H I 5D 2D 1025 C A Hot water 1 F C Probe well E Recirculation...

Страница 10: ...er is supplied with a temperature over 50 C on the faucet of use can cause serious burns It therefore requires the use of a thermostatic mixing valve 9 9This valve will be required for solar panel ins...

Страница 11: ...cts must not exceed a total length of 10 meters sum of suction and outlet with diameter of the ducts equal to 160 mm Fan useful static head Pa mc h 0 0 50 100 150 200 250 100 200 300 400 500 600 2 7 E...

Страница 12: ...perature probe Con nected S04 evaporator output temperature probe Con nected Relays output Initials Description Status Default Note r1 compressor igni tion enabling 1 enabled 0 disabled 1 Con nected r...

Страница 13: ...ON OFF 6 Key Function L14 L1 L2 L3 L4 L5 L6 L7 L8 L19 L18 L17 L16 L15 L9 L10 L11 L12 L13 5D 2D L1 Unit activation from remote contact LED ON OFF L2 Compressor activation LED L3 Led electrical heater O...

Страница 14: ...key for 3 seconds to reset the counter of heat pump heating element and total runtime UP key stops the flashing of the LED rel evant to anti legionella treatment and re sets the relevant counter KEY S...

Страница 15: ...nge the parameter the change is automatically confirmed without pressing any other key the setpoint flashes for several seconds and the display shows the water temperature detected by the probe S01 Pa...

Страница 16: ...ual mode 2 H29 1 0 1 numero Enable air probe S02 0 disabled 1 enabled 2 H30 1 0 1 numero Enable digital input ID2 0 disabled 1 enabled 2 H32 1 0 1 Num 1 Anti legionella treatment activation 2 H33 0 0...

Страница 17: ...04 and F03 2 DEFROST BRANCH DFR Parameter Default Limits Unit Description Level d01 0 0 1 2 Num 1 Defrost activation 0 disabled 1 active with hot gas 2 not available 2 d02 1 0 1 Num 1 Defrost exit mod...

Страница 18: ...isualizeActivation Compressor VisualizeActivation Elect Heater VisualizeActivation FAN VisualizeOn Off Elect Heater contactGND RES VisualizeOn Off Unit contactTIMER RES VisualizeValue ChangeValue Visu...

Страница 19: ...or the boiler according to the value of parameter H50 previously seen To ac tivate MANUAL mode press and hold FUNCTION key until LED L18 flashes then press SET key to confirm LED L18 remains steady on...

Страница 20: ...from Monday to Friday according to the following steps press FUNCTION key until flashing LED L10 is displayed press SET to confirm the selection LED L10 is steady on whereas LED L13 ON from time inter...

Страница 21: ...x ternal contact can be displayed near parameter Id4 1 on hold 0 enabled 3 20 Electric heating element function from remote ON OFF If you have a twin rate tariff and a suitable counter you may decide...

Страница 22: ...rd pressing the SET key once the cause of alarm has fixed ALARM E03 PROBE S01 FAILURE It is active if the sensor S01 sonda acqua serbatoio is short cir cuited or disconnected The alarm shuts off the u...

Страница 23: ...d cannot be either casually or accidentally electrically powered Therefore the electrical power must be disconnected any time maintenance work is carried out 9 9The customer must carry out all mainten...

Страница 24: ...pes vibrate The electric heating element does not switch on the start up is not necessary As a general rule however before calling for service try to power cycle the unit 9 9If the user is not able to...

Страница 25: ...25 MAINTENANCE...

Страница 26: ...26 MAINTENANCE...

Страница 27: ......

Страница 28: ...0442630111 Fax 044222378 www riello it The manufacturer strives to continuously improve all products Appearance dimensions technical specifications standard equipment and accessories are therefore lia...

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