MP2000 AIR CONDITIONERS

Software per condizionatori d'aria a pompa di calore e Roof Top • EPROM CPX.... • Software for heat pump air conditioners and Roof Top

In caso di sonda aria esterna guasta o sconnessa (AL22 Probe fail temperature) lo sbrinamento è ciclico in base al tempo impostato nel set "Defrosting cycle".

MODALITA' DI SBRINAMENTO

Ad aria: con temperatura aria esterna maggiore del parametro

"Defrosting limit".

Per inversione di ciclo: con temperatura aria esterna minore del parametro "Defrosting limit".

L’isteresi è fissa a ±1 oC:

In case the external air probe is faulty or disconnected (AL22 Probe fail temperature), defrosting is cyclical, based on the time preset in the “Defrosting cycle” set.

DEFROSTING PROCEDURE

With air: when the external air temperature is higher than the "Defrosting limit" parameter.

Through a reverse cycle: when the external air tempera- ture is lower than the "Defrosting limit" parameter.

The hysteresis is fixed at ±1°C

1°C

Sbrinamento ad aria

Defrosting with air

Sbrinamento a gas caldo

Defrosting with hot gas

Limite sbrinamento

Defrosting limit

Fig. 66

Sbrinamento ad aria

Viene utilizzato il calore contenuto dall’aria esterna.

Il ventilatore del condensatore è attivo con l’uscita proporziona- le al valore P2 max.

Il termine dello sbrinamento viene determinato sulla base dei parametri di funzionamento.

La durata massima dello sbrinamento non potrà essere comun- que maggiore del set "Defrosting time".

Durante lo sbrinamento, se presente, viene attivata la resisten- za di riscaldamento.

I compressori sono comandati nel seguente modo:

Unità con 1 compressore: viene fermato il compressore.

Unità con 2 compressori su 1 circuito frigorifero: vengono fermati entrambi i compressori.

Unità con 2 compressori su 2 circuiti frigoriferi: viene fermato il compressore interessato allo sbrinamento e attivato l’altro com- pressore per riscaldare.

Sbrinamento per inversione di ciclo

Viene utilizzato il gas caldo di mandata del compressore che viene inviato allo scambiatore esterno; il compressore rimane in funzione e vengono fermati i ventilatori dello scambiatore esterno.

La fine dello sbrinamento avviene quando il valore della pressio- ne di condensazione supera il set "Pressure defrost stop", a questo punto vengono attivati per 15 sec. i ventilatori dello scambiatore esterno con controllo di condensazione estivo per poi ripristinare il funzionamento invernale.

Durante lo sbrinamento, se presente, viene attivata la resisten- za di riscaldamento.

I compressori sono comandati nel seguente modo:

Unità con 1 compressore: viene attivato il compressore a piena capacità.

Unità con 2 compressori su 1 circuito frigorifero: vengono attivati entrambi i compressori.

Unità con 2 compressori su 2 circuiti frigoriferi: il compressore interessato allo sbrinamento effettua l’inversione di ciclo e passa a piena capacità, l’altro compressore viene attivato per riscaldare.

Con Configurazione DXW

(con "Condenser type" = WATER)

Non avviene alcun sbrinamento.

La sonda sull’uscita acqua scambiatore ha la funzione di limite antigelo (vedere allarme AL36).

120

Air defrosting

The external air heat is used.

The condenser fan is activated, with the proportional output at P2 max.

The end of defrosting is determined based on the running parameters.

The maximum defrosting duration must never exceed the "Defrosting time" set.

During defrosting, the heater is activated, if any. Compressors are controlled as follows:

Unit with 1 compressor: the compressor is stopped.

Unit with 2 compressors on 1 cooling circuit: both compres- sors are stopped.

Unit with 2 compressors on 2 cooling circuits: the compres- sor involved in defrosting is stopped, the other is activated for heating.

Defrosting through reverse cycle

The compressor’s hot gas discharge is used, that being sent to the external exchanger.

The compressor remains ON and the external exchanger fans are stopped.

Defrosting ends when the condensation pressure value exceeds the "Pressure defrost stop" set: the external exchanger fans are activated for 15 seconds, with summer condensation control; then, the winter running is reset.

During defrosting, the heater is activated, if any. Compressors are controlled as follows:

Unit with 1 compressor: the compressor is activated in full capacity.

Unit with 2 compressors on 1 cooling circuit: both compres- sors are activated.

Unit with 2 compressors on 2 cooling circuits: the compres- sor involved in defrosting carries out a cycle reversal with a passage to full capacity, the other is activated for heating.

With DXW configuration

(with "Condenser type" = WATER)

No defrosting occurs.

The function of the probe on the exchanger’s water outlet is with limit function (see alarm AL36).

RC GROUP - 149_ItEn.0102

Page 119 Page 121
Page 120
Image 120
Dell MP2000 manual Modalita DI Sbrinamento, Defrosting Procedure, Air defrosting, Defrosting through reverse cycle
Page 119 Page 121

MP2000 specifications

The Dell MP2000 is a versatile multimedia projector designed to deliver impressive performance for both business and entertainment purposes. This projector offers a sleek design and robust features, making it an ideal choice for presentations, classroom environments, and home theater setups.

One of the standout features of the Dell MP2000 is its high brightness capability. With a brightness rating of about 3,000 ANSI lumens, it ensures clear and vivid projections even in well-lit environments. This brightness level makes it suitable for various settings, from large conference rooms to small classrooms, ensuring that the content is easily visible to all audiences.

In addition to its brightness, the MP2000 boasts a native resolution of XGA (1024x768 pixels), providing sharp and detailed images. The projector supports a range of resolutions up to UXGA (1600x1200), ensuring compatibility with various media formats. This versatility allows users to project high-quality videos, presentations, and images with excellent clarity.

The MP2000 employs DLP (Digital Light Processing) technology, which enhances image quality and color accuracy. DLP is known for its superior brightness and contrast characteristics, giving presentations a professional look. The projector’s color wheel ensures vibrant colors, making it perfect for showcasing graphics and videos.

Connectivity options on the Dell MP2000 are extensive, catering to various devices and media sources. It includes multiple input ports, such as VGA, HDMI, and USB, allowing easy connection to laptops, desktops, and other devices. The inclusion of an RS-232 port also enables integration into larger AV systems for more streamlined control.

Portability is another key characteristic of the MP2000. Weighing less than 5 pounds, it is easy to transport, making it a great option for traveling professionals or educators who need to move between locations. The projector also features an intuitive interface and remote control, facilitating user-friendly navigation through menus and settings.

For added convenience, the MP2000 supports rapid startup and shutdown processes, reducing waiting times between presentations. Its lamp life is impressive, lasting up to 5,000 hours in eco mode, which minimizes maintenance costs and ensures longevity.

In conclusion, the Dell MP2000 is a powerful and reliable projector that excels in brightness, image quality, and connectivity. Its DLP technology, portability, and user-friendly features make it a top choice for anyone looking to enhance their presentation or home viewing experience. Whether for educational purposes or business meetings, the MP2000 delivers outstanding performance and versatility.
Top Page Image Contents