1. Introduction
This manual provides essential instructions for the safe installation, efficient operation, and proper maintenance of your GREE MULTI+ Ultra Vireo 23 SEER Dual Ductless Mini Split System. This system includes two 9,000 BTU indoor units connected to a single outdoor condenser, providing zoned heating and cooling. Please read this manual thoroughly before attempting any installation or operation, and retain it for future reference. Adherence to these instructions will ensure optimal performance and longevity of your unit.
2. Safety Information
Important: Installation, maintenance, and repair of this equipment must be performed by a qualified, state-licensed HVAC contractor. Improper installation or service can result in electric shock, fire, property damage, or personal injury. Always disconnect power to the unit before performing any service or maintenance.
- Ensure the power supply matches the unit's specifications (230 Volts).
- Do not operate the unit with wet hands.
- Keep children and pets away from the outdoor unit.
- Do not block air inlets or outlets of either indoor or outdoor units.
- The refrigerant used in this system is R410A. Handle with care and only by certified technicians.
3. Package Contents
Verify that all components are present upon unpacking:
- Outdoor Condenser Unit (1)
- Indoor Wall Mounted Air Handler Units (2 x 9,000 BTU)
- Wireless Remote Controls (2)
- Installation Manual and User Guide
Note: Refrigerant linesets, electrical wiring, and drainage tubing are required for installation but are not included with the system.
4. Setup and Installation
Installation of this GREE Mini Split System requires specialized tools and knowledge. It must be performed by a state-licensed HVAC contractor to ensure compliance with local codes, proper system function, and to maintain warranty validity.
4.1. General Installation Steps (for Qualified Technicians)
- Site Selection: Choose appropriate locations for the indoor units (one per zone) and the outdoor condenser, ensuring adequate airflow and structural support.
- Mounting: Securely mount indoor units to the wall and the outdoor condenser on a level pad or wall bracket.
- Refrigerant Line Connection: Connect the refrigerant lines between the indoor units and the outdoor condenser. Ensure proper flaring, torque, and vacuum procedures are followed.
- Electrical Wiring: Connect power and communication wiring according to the wiring diagram provided in the installation manual and local electrical codes.
- Drainage: Install condensate drain lines with proper slope to ensure efficient water removal.
- System Test: Perform a leak test, vacuum the system, and charge with refrigerant as necessary. Conduct a test run to verify all functions.
Figure 4.1: GREE Indoor Wall Mounted Air Handler Unit. This unit is designed for quiet and efficient air distribution within a room.
Figure 4.2: GREE Outdoor Condenser Unit. This unit houses the compressor and heat exchanger, responsible for the system's heating and cooling cycles.
5. Operating Instructions
Your GREE Mini Split System is controlled via the wireless remote control and can also be managed through a smartphone application via built-in Wi-Fi.
5.1. Wireless Remote Control Functions
Figure 5.1: GREE Wireless Remote Control. This remote allows for full control over the indoor unit's settings and modes.
- POWER Button: Turns the unit ON or OFF.
- MODE Button: Cycles through operating modes: AUTO, COOL, DRY, FAN, HEAT.
- FAN Button: Adjusts fan speed (Auto, Low, Medium, High).
- SWING Button: Controls the louver's vertical airflow direction.
- SLEEP Button: Activates sleep mode for energy-efficient and quiet operation during sleep.
- I FEEL Button: Activates the 'I FEEL' function. In this mode, the remote control's built-in sensor measures the ambient temperature and transmits this data to the indoor unit. The unit then adjusts its operation to maintain the desired temperature at the remote's location, optimizing comfort in your immediate vicinity.
- TIMER ON/OFF Button: Sets the automatic ON/OFF time for the unit.
- CLOCK Button: Sets the current time on the remote control.
- TURBO Button: Initiates rapid cooling or heating for a short period.
- X-FAN Button: Activates the X-Fan function, which runs the indoor fan for a short period after shutdown to dry the evaporator coil and prevent mold growth.
- LIGHT Button: Turns the display light on the indoor unit ON or OFF.
5.2. Built-in Wi-Fi Operation
The GREE MULTI+ Ultra Vireo system includes built-in Wi-Fi, allowing you to control your units remotely via a compatible smartphone application. Download the GREE+ app from your device's app store. Refer to the separate Wi-Fi setup guide or the in-app instructions for pairing your units and utilizing smart features.
6. Maintenance
Regular maintenance ensures the efficiency and longevity of your mini split system. Always disconnect power to the unit before performing any maintenance.
6.1. Air Filter Cleaning
The air filters in the indoor units should be cleaned every two weeks or more frequently depending on usage and air quality. Dirty filters can reduce airflow, decrease efficiency, and impact air quality.
- Open the front panel of the indoor unit.
- Remove the air filters.
- Clean the filters with a vacuum cleaner or wash them with lukewarm water and a mild detergent.
- Allow filters to dry completely before reinstalling.
- Close the front panel securely.
6.2. Outdoor Unit Maintenance
Periodically inspect the outdoor condenser unit. Ensure the area around the unit is clear of leaves, debris, and other obstructions that could impede airflow. Clean the coil fins gently if they become dirty, taking care not to bend them. For thorough cleaning or inspection of internal components, contact a qualified HVAC technician.
7. Troubleshooting
Before contacting service, review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not start | No power; Remote control batteries low; Timer set to OFF | Check circuit breaker; Replace batteries; Cancel timer setting |
| Insufficient cooling/heating | Dirty air filter; Blocked outdoor unit; Incorrect mode setting; Room too large | Clean air filter; Clear obstructions; Select correct mode; Consult HVAC professional for sizing |
| Unusual noise | Loose parts; Debris in fan; Refrigerant flow noise (normal) | Contact technician if persistent or loud; Normal refrigerant sounds are common |
| Water leakage from indoor unit | Blocked drain pipe; Improper installation | Contact a qualified HVAC technician immediately |
For issues not listed here or if troubleshooting steps do not resolve the problem, contact a qualified HVAC technician.
8. Specifications
Key technical specifications for the GREE MULTI+ Ultra Vireo 23 SEER Dual Ductless Mini Split System (Model: MULTIU18CVIR200):
| Feature | Specification |
|---|---|
| Brand | GREE |
| Model Number | MULTIU18CVIR200 |
| System Capacity | 18,000 BTU (1.5 Tons) |
| Indoor Unit Capacity | 2 x 9,000 BTU |
| SEER (Seasonal Energy Efficiency Ratio) | 23.00 |
| Voltage | 230 Volts |
| Noise Level (Outdoor Unit) | 56 Decibels |
| Refrigerant | R 410A |
| Special Feature | Heating And Cooling Function, Built-in Wi-Fi, G10 Inverter Technology |
| Installation Type | Split System |
| Item Weight (Outdoor Unit) | 161 Pounds |
| Control Method | Remote Control, Wi-Fi App |
8.1. Unit Dimensions
Figure 8.1: Dimensions for Vireo+ Multi U Indoor and Outdoor Units. Refer to this table for specific measurements of various BTU capacities.
| Unit Type | BTU Capacity | Measurement (W x H x D) |
|---|---|---|
| Indoor Units | 9,000 BTU | 33.4" x 11.4" x 8.2" |
| 12,000 BTU | 33.4" x 11.4" x 8.2" | |
| 18,000 BTU | 36.2" x 11.8" x 8.8" | |
| 24,000 BTU | 42.4" x 12.8" x 9.7" | |
| Outdoor Units | 18,000 BTU | 36.2" x 31.1" x 14.6" |
| 24,000 BTU | 36.2" x 31.1" x 14.6" | |
| 36,000 BTU | 40" x 43.5" x 17.3" | |
| 42,000 BTU | 40" x 43.5" x 17.3" |
9. Warranty Information
GREE provides the following manufacturer's warranty for this system:
- Parts: 5 Year Limited Warranty
- Compressor: 7 Year Limited Warranty
Important: The warranty terms are valid only if the installation is performed by a state-licensed HVAC contractor. Failure to comply with this requirement may void the warranty.
Figure 9.1: Icons representing 5-year limited parts warranty, Wi-Fi readiness, extra heating & cooling, ETL listing, G10 Inverter Technology, AHRI certification, and Energy Star rating.
10. Support
For technical assistance, service requests, or warranty claims, please contact your installing HVAC contractor. They are best equipped to provide support for your specific installation. If you require further assistance, you may contact GREE customer service directly. Please have your product model number (MULTIU18CVIR200) and installation date readily available when contacting support.
