1. Introduzione
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Gree Multi21+ Tri-Zone Concealed Duct Mini Split Air Conditioner Heat Pump System. Please read this manual thoroughly before operating the unit and retain it for future reference. Proper installation and maintenance are crucial for optimal performance and warranty validity.

Image 1.1: Gree Multi-Ducted System Branding.
2. Informazioni sulla sicurezza
Your safety and the safety of others are paramount. This section contains important safety instructions. Always observe all safety warnings and precautions.
- Installazione professionale richiesta: Installation, maintenance, and repair of this equipment must be performed by a qualified, licensed HVAC technician. Improper installation can result in electric shock, fire, water leakage, or other hazards.
- Sicurezza elettrica: Ensure the unit is properly grounded. Do not operate with wet hands. Disconnect power before servicing.
- Refrigerante: This system uses R410A refrigerant. Handling of refrigerant should only be done by certified personnel.
- Distanze: Maintain adequate clearances around the outdoor unit for proper airflow.
- Bambini e animali domestici: Tenere i bambini e gli animali domestici lontani dall'unità esterna e assicurarsi che nonampcon i controlli.
3. Prodotto finitoview
The Gree Multi21+ Tri-Zone Concealed Duct Mini Split Air Conditioner Heat Pump System is designed to provide efficient heating and cooling for up to three separate zones. This system utilizes Gree's G10 inverter technology for energy savings and stable room temperatures, along with eco-friendly R410A refrigerant.
Componenti del sistema
- Unità esterna: The main compressor and condenser unit.
- Indoor Concealed Duct Units (x3): Designed for discreet installation above suspended ceilings or within open closet spaces, delivering conditioned air via ductwork.
- Telecomandi: For individual zone control.

Immagine 3.1: Passoview of the Gree Multi21+ Tri-Zone system, showing outdoor unit, three concealed indoor units, and remote controls.

Image 3.2: A single Gree concealed duct indoor unit, designed for hidden installation.

Image 3.3: The Gree outdoor condenser unit, featuring the G10 inverter technology.
4. Configurazione e installazione
Importante: Installation of this Gree Multi21+ system requires specialized knowledge and tools. It must be performed by a state-licensed HVAC contractor to ensure safety, proper function, and warranty eligibility.
Considerazioni chiave sull'installazione:
- Posizione: Indoor units are designed for concealed spaces (e.g., above ceilings, within closets). The outdoor unit requires a stable, level surface with adequate airflow.
- Set di linee: The system requires 1/4" x 3/8" line sets (x2) which are not included and must be purchased separately.
- Cavi elettrici: Proper electrical connections and grounding are critical. The system operates on 208/230V.
- Condotti: Appropriate ductwork must be installed to distribute conditioned air from the concealed indoor units to the living spaces.
- Drenaggio: Condensate drainage lines must be correctly installed to prevent water damage.
Consult the detailed installation manual provided with the physical product for specific instructions, diagrams, and safety protocols. Your licensed HVAC contractor will follow these guidelines.
5. Istruzioni per l'uso
Once professionally installed, your Gree Multi21+ system provides flexible climate control for multiple zones. Each indoor unit is controlled independently, typically via a dedicated remote control.
Funzionamento di base:
- Accensione/spegnimento: Utilizzare il pulsante di accensione sul telecomando per accendere o spegnere l'unità.
- Selezione della modalità: Selezionare la modalità di funzionamento desiderata (Raffreddamento, Riscaldamento, Ventilatore, Deumidificazione, Auto) utilizzando il pulsante Modalità.
- Regolazione della temperatura: Use the up/down arrows to set the desired temperature for each zone.
- Velocità della ventola: Adjust fan speed (Low, Medium, High, Auto) as needed.
- Funzione timer: Programmare l'unità affinché si accenda o si spenga a orari specifici.

Image 5.1: Illustration of the system's cooling and heating capabilities.
Controllo multizona:
The Tri-Zone system allows you to set different temperatures and operating modes for each of the three connected zones, optimizing comfort and energy usage across your space.

Immagine 5.2: Es.ample of a multi-zone setup with different temperatures in various rooms.
6. Manutenzione
Regular maintenance ensures the longevity and efficiency of your Gree Multi21+ system. Always disconnect power to the unit before performing any maintenance.
Manutenzione dell'utente:
- Pulizia del filtro: Regularly clean or replace the air filters in the indoor units as per the specific instructions in your product's detailed manual. Dirty filters reduce airflow and efficiency.
- Pulizia esterna: Wipe down the exterior of the units with a soft, damp stoffa. Non utilizzare prodotti chimici aggressivi o detergenti abrasivi.
Manutenzione professionale:
It is recommended to schedule annual professional maintenance with a licensed HVAC technician. This includes:
- Controllo dei livelli e della pressione del refrigerante.
- Ispezione dei collegamenti elettrici.
- Cleaning coils and drainage systems.
- Verifying proper operation of all components.
7. Risoluzione Dei Problemi
Prima di contattare un tecnico dell'assistenza, rifview the following common issues and potential solutions. For complex problems, always contact a licensed HVAC professional.
| Problema | Possibile causa | Soluzione |
|---|---|---|
| L'unità non si accende | No power, tripped breaker, remote control battery low | Controllare l'alimentazione, ripristinare l'interruttore, sostituire le batterie del telecomando. |
| Raffreddamento/riscaldamento insufficiente | Filtri dell'aria sporchi, unità esterna bloccata, impostazione della modalità errata, refrigerante basso | Clean filters, clear obstructions, verify mode, contact technician for refrigerant check. |
| Rumore insolito | Parti allentate, ostruzione della ventola, problema al compressore | Inspect for loose parts, remove obstructions. If noise persists, contact technician. |
| Perdita d'acqua | Linea di scarico bloccata, installazione non corretta | Check and clear drain line. If issue persists, contact technician. |
8. Specifiche
Detailed technical specifications for the Gree Multi21+ Tri-Zone Concealed Duct Mini Split Air Conditioner Heat Pump System, model MULTI24CDUCT302.
| Specificazione | Valore |
|---|---|
| Marca | VERDE |
| Numero di modello | MULTI24CDUCT302 |
| Potenza di raffreddamento | 24,000 unità termiche britanniche |
| Capacità | 2 tonnellate |
| Rapporto di efficienza energetica stagionale (SEER) | 21.00 |
| Voltage | 208/230 Volt |
| Livello di rumore | 50 decibel |
| Refrigerante | R-410A |
| Dimensioni dell'unità esterna (L x A x P) | 38" x 31.1" x 17.3" (for 24,000 BTU) |
| Dimensioni dell'unità interna (L x A x P) | 27.6" x 7.9" x 24.2" (for 9,000 BTU units) / 35.4" x 7.9" x 24.2" (for 18,000 BTU unit) |
| Peso dell'articolo | 153 libbre |
| Tipo di materiale | Acciaio |
| Caratteristica speciale | Eco-compatibile |

Image 8.1: Detailed measurement chart for Gree DUCT-A indoor and outdoor units across various BTU capacities.

Image 8.2: Certifications including 5-Year Limited Parts Warranty, R410A Refrigerant, Heating & Cooling, Intertek ETL Listed, G10 Inverter Technology, AHRI Certified, and Energy Star.
9. Garanzia e supporto
Informazioni sulla garanzia:
The Gree Multi21+ Tri-Zone system comes with a manufacturer's warranty:
- Parti: Garanzia limitata di 5 anni
- Compressore: Garanzia limitata di 7 anni
Condizioni importanti di garanzia: To be eligible for the warranty, installation must be performed by a state-licensed HVAC contractor. Failure to comply with this requirement may void your warranty.
Supporto tecnico:
For technical assistance, warranty claims, or service requests, please contact your licensed HVAC installer or refer to the official Gree websito per fornitori di servizi autorizzati.





