1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your boreal BRISA 18,000 BTU 1.5 Tons Dual Zone Wall Mount Ductless Mini Split System. Please read this manual thoroughly before installing or operating the unit and retain it for future reference. Proper installation and maintenance are crucial for optimal performance and longevity of the system.
2. Safety Information
Important: Installation of this air conditioning system must be performed by a state-licensed HVAC contractor. Improper installation can lead to electric shock, fire, water leakage, or other serious hazards, and will void the product warranty.
- Always disconnect power before performing any maintenance or cleaning.
- Do not insert fingers or objects into the air inlet/outlet.
- Ensure the unit is properly grounded to prevent electric shock.
- Keep flammable materials away from the unit.
- If abnormal operation (e.g., burning smell) occurs, immediately turn off the unit and disconnect power. Contact a qualified service technician.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
3. Product Overview
The boreal BRISA Dual Zone Mini Split System provides efficient heating and cooling for two separate areas. The system consists of an outdoor condenser unit, two indoor wall-mounted air handlers, and a wireless remote control for each indoor unit.
System Components

Figure 3.1: Complete boreal BRISA Dual Zone Mini Split System, showing the outdoor condenser, two indoor wall-mounted units, and a remote control.

Figure 3.2: The outdoor condenser unit, responsible for heat exchange with the outside air.

Figure 3.3: An indoor wall-mounted air handler unit, which distributes conditioned air within the room.

Figure 3.4: The wireless remote control for operating the indoor air handler unit.
The system utilizes inverter technology for energy efficiency and precise temperature control. It operates on 230V power.
4. Setup and Installation
As stated in the safety information, professional installation by a state-licensed HVAC contractor is mandatory for this system. This ensures compliance with local codes, proper refrigerant handling, electrical connections, and warranty validity.
Components Required (Not Included)
- Lineset: Refrigerant lines connecting the indoor and outdoor units.
- Electrical Wiring: Appropriate gauge wiring for 230V connection.
- Drainage Tubing: For condensate removal from indoor units.
- Mounting Hardware: For securing indoor and outdoor units.
- Surge Protector: Recommended for electrical protection.
- Condenser Pad/Wall Bracket: For outdoor unit placement.

Figure 4.1: Example of additional components often required for mini-split installation, such as lineset, surge protector, and a condenser pad.
Your HVAC contractor will ensure all necessary components are correctly sized and installed according to manufacturer specifications and local building codes.
5. Operating Instructions
Each indoor unit is controlled by its dedicated wireless remote control. Ensure the remote has fresh batteries and is pointed towards the indoor unit when transmitting commands.
Remote Control Functions

Figure 5.1: Wireless remote control for the boreal BRISA system. Key buttons include ON/OFF, Mode, Fan, Temp, and various function buttons.
- ON/OFF Button: Press to turn the unit on or off.
- MODE Button: Cycles through operating modes:
- AUTO: Unit automatically selects cooling or heating based on room temperature.
- COOL: Provides cooling. Adjust temperature with TEMP buttons.
- HEAT: Provides heating. Adjust temperature with TEMP buttons.
- DRY: Dehumidifies the room.
- FAN: Circulates air without heating or cooling.
- FAN Button: Adjusts fan speed (Auto, Low, Medium, High).
- TEMP Buttons (Up/Down Arrows): Adjusts the desired temperature setting.
- TURBO Button: Activates maximum fan speed for rapid cooling or heating.
- I FEEL Button: Activates a sensor in the remote to measure ambient temperature, providing more accurate comfort control.
- T-ON/T-OFF Buttons: Sets a timer for the unit to turn on or off automatically.
- LIGHT Button: Turns the display light on the indoor unit on or off.
- WIFI Button: For connecting the unit to a Wi-Fi network (if applicable model). Refer to separate Wi-Fi setup guide.
- SLEEP Button: Adjusts temperature and fan speed for comfortable sleep.
6. Maintenance
Regular maintenance ensures optimal performance, energy efficiency, and extends the lifespan of your mini-split system. Always disconnect power to the unit before performing any maintenance.
Indoor Unit Maintenance
- Air Filter Cleaning (Every 2-4 Weeks):
- Open the front panel of the indoor unit.
- Remove the air filters.
- Clean filters with a vacuum cleaner or wash with lukewarm water. Allow to dry completely before reinserting.
- Close the front panel.
- Unit Surface Cleaning: Wipe the indoor unit's surface with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
Outdoor Unit Maintenance
- Coil Cleaning (Annually): The outdoor coil should be cleaned annually by a qualified technician to remove dirt and debris that can impede heat exchange.
- Clear Obstructions: Ensure the area around the outdoor unit is free from leaves, dirt, snow, and other obstructions that could block airflow.
For detailed annual inspections and maintenance, it is recommended to schedule service with a licensed HVAC professional.
7. Troubleshooting
Before contacting service, review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power, remote control batteries dead, circuit breaker tripped. | Check power supply, replace remote batteries, reset circuit breaker. |
| Insufficient cooling/heating. | Dirty air filters, blocked outdoor unit, wrong mode selected, temperature setting too high/low. | Clean air filters, clear obstructions from outdoor unit, select correct mode, adjust temperature. |
| Water leakage from indoor unit. | Clogged drain line, improper installation. | Check and clear drain line. If issue persists, contact HVAC technician. |
| Unusual noise. | Loose parts, fan obstruction, refrigerant issues. | Turn off unit and inspect for loose parts or obstructions. If noise continues, contact HVAC technician. |
If troubleshooting steps do not resolve the issue, contact a licensed HVAC professional for assistance. Do not attempt to repair the unit yourself, as this can be dangerous and may void the warranty.
8. Specifications
Key technical specifications for the boreal BRISA 18,000 BTU 1.5 Tons Dual Zone Mini Split System (Model: MBRS18-W200).
| Feature | Value |
|---|---|
| Brand | boreal |
| Model Number | MBRS18-W200 |
| Cooling Power | 18,000 British Thermal Units (BTU) |
| Tonnage | 1.5 Tons |
| Voltage | 230 Volts |
| SEER (Seasonal Energy Efficiency Ratio) | 22 |
| EER (Energy Efficiency Ratio) | 12.50 |
| HSPF (Heating Seasonal Performance Factor) | 11 |
| Room Coverage | 600 - 1,000 sqft |
| Refrigerant | R 410A |
| Special Feature | Remote Controlled |
| Form Factor | Mini-Split |
Unit Dimensions

Figure 8.1: Dimensions (Width x Height x Depth) for various BTU indoor and outdoor units in the Boreal Brisa Multi series. For this 18,000 BTU system, refer to the 9,000 BTU entries for indoor units and the 18,000 BTU entry for the outdoor unit.
Note: The 18,000 BTU dual zone system typically uses two 9,000 BTU indoor units with an 18,000 BTU outdoor unit. Refer to the specific BTU ratings for your indoor units for exact dimensions.
9. Warranty and Support
Manufacturer's Warranty: The boreal BRISA system comes with a warranty of three (3) years on all parts and five (5) years on the compressor.
Warranty Eligibility: To be eligible for the manufacturer's warranty, installation must be performed by a state-licensed HVAC contractor. Proof of professional installation may be required for warranty claims.
For technical support, warranty claims, or to locate a licensed service provider, please refer to the contact information provided with your purchase documentation or visit the official boreal website.





