The Dometic Brisk II is a high-efficiency rooftop air conditioning unit designed for recreational vehicles (RVs), vans, and other mobile living spaces. As a compact, lightweight unit, it offers improved performance and ease of installation compared to earlier models. This article provides a detailed overview of the installation process, based on official documentation and technical manuals, focusing on key steps, safety guidelines, and considerations for both ducted and non-ducted configurations.
Overview of the Dometic Brisk II
The Dometic Brisk II is a cool-only rooftop air conditioner that features an innovative design aimed at maximizing airflow and efficiency. Its EPP (Expanded Polypropylene) foam housing not only reduces the unit’s weight by 19% compared to previous models but also enhances cooling performance. The unit is built to fit standard 14-inch by 14-inch roof vent openings and is compatible with both ducted and non-ducted configurations.
For ducted applications, the Brisk II requires the return air grille, a control kit, and a Capacitive Touch (CT) thermostat. In non-ducted setups, an air distribution box is necessary to ensure proper air circulation. The Brisk II also features a custom composite laminated shroud that is UV-protected for long-term durability in outdoor conditions.
Safety and Installation Considerations
Before beginning the installation process, it is essential to review the safety guidelines provided by Dometic. According to the manufacturer, the Brisk II should only be installed by qualified personnel who are familiar with the unit’s specifications and the safety precautions outlined in the instruction manual. The manual emphasizes that improper assembly or connection can lead to malfunctions, including compressor short-cycling, supply circuit overloads, and reduced performance.
One important note for users is that the installation of the Brisk II may affect the overall height of the vehicle. Specifically, the BR342 model increases the vehicle's height by 283 mm. Users are advised to consult with their vehicle manufacturer to determine if a technical inspection is required after installation and whether any modifications to the vehicle documentation are necessary.
Additionally, the unit should not be operated in ambient temperatures above 43°C (109.4°F), as this can cause damage to internal components. Labels on the unit provide essential information for both users and installers, including specifications and warnings.
Preparing for Installation
Before beginning the installation process, it is crucial to gather all required components and tools. The installation kit typically includes the air distribution box (for non-ducted applications), a return air grille (for ducted applications), mounting hardware, and various fasteners such as sheet metal and wood screws.
The installation process begins with preparing the roof opening. The unit’s gasket must be aligned correctly over the opening, and the unit may be slightly lifted from below to adjust positioning. Once aligned, the air distribution box and mounting hardware are removed from their packaging for installation.
Mounting the Air Distribution Box
For non-ducted installations, the air distribution box is a critical component that ensures proper air circulation. The installation instructions specify that the air distribution box should be mounted using a four-bolt pattern. To secure the box, users are instructed to install two sheet metal screws inside the return air opening and eight wood screws along the front, rear, and side doors of the box.
Once the box is mounted, the return air vent grille is installed by sliding its tab into a slot in the air distribution box and rotating it into place until it snaps securely. After this step, the unit is considered fully installed and ready for operation.
Installing the Dometic Brisk II A/C Connect System
For users seeking to integrate the Dometic Brisk II with an A/C Connect system, additional steps are required. The A/C Connect system allows for enhanced control and integration with the vehicle’s ventilation setup. The installation process begins by removing the filter covers and filters from the A/C unit. The cover is then removed by carefully extracting the screws that hold it in place.
Next, the mounting bracket is accessed by removing the four bolts that secure it to the unit. Removing the bracket exposes the plenum, which is divided into two compartments. The upper portion of the divider can be optionally removed if necessary, though this is not required for the A/C Connect system to function.
The A/C Connect system is then installed by inserting the A/C adapter into the square opening at the bottom of the Dometic Brisk II unit. The fit should be snug, and the adapter’s lip should sit flush with the metal base. The system is secured using enclosed self-tapping screws. Finally, the two vent adapters are inserted into the ventilation openings on either side of the plenum. These adapters should fit behind the bolts that secure the A/C to the roof.
If the vent openings are not compatible with the adapters (either too small or too large), users are directed to a specific section of the manual that provides guidance on adapting the system to fit their rig.
Connecting Electrical Components
Once the mechanical components are in place, the next step is to connect the electrical components. Users are instructed to reach into the return air opening and pull down the unit’s electric cord and control cables for later connection. Before proceeding, the thickness of the ceiling should be measured to ensure proper alignment and to determine how many rows of material, if any, need to be removed.
For ducted applications, the duct divider is installed 111.1 mm from the back of the roof opening. It is important that the foil side of the divider faces the rear of the unit. Incorrect installation of the divider can lead to compressor short-cycling, which may result in supply circuit overloads and reduced performance.
Final Steps and Testing
After all components are installed and connected, the final step is to verify the alignment of the gasket and make any necessary adjustments. Once the unit is properly seated and secured, the air distribution box and mounting hardware are fastened into place.
The installation is considered complete once the return air grille is installed and the A/C Connect system (if used) is fully integrated. At this point, the power supply to the unit can be turned on, and the system can be tested for operation.
When operating the Brisk II for the first time, users should note that the previous operating mode will be automatically selected when the unit is turned on. The MODE button can be used to change the operation mode as needed. The unit will automatically adjust its running mode based on the temperature difference between the set point and the ambient temperature.
Ducted vs. Non-Ducted Configurations
The Dometic Brisk II is compatible with both ducted and non-ducted configurations, each with its own set of components and installation requirements. In a ducted setup, the unit is connected to ducting that directs air to and from the unit, allowing for more precise temperature control. This configuration requires the return air grille, a control kit, and a Capacitive Touch (CT) thermostat.
In contrast, a non-ducted setup does not require ducting and instead uses an air distribution box to disperse air evenly throughout the space. This configuration is simpler and may be preferable for smaller spaces or when ducting is not feasible. However, it is important to note that non-ducted setups may not provide the same level of temperature control as ducted systems.
Regardless of the configuration, users should ensure that all components are installed according to the manufacturer’s specifications to avoid performance issues and potential damage to the unit.
Maintenance and Troubleshooting
While the Dometic Brisk II is designed for durability and ease of maintenance, regular checks and cleaning are recommended to ensure optimal performance. The unit’s filter should be inspected and cleaned periodically to prevent airflow restrictions. Additionally, the condenser coils should be kept free of debris to maintain efficient heat exchange.
If the unit experiences performance issues, such as reduced cooling capacity or unusual noises, users are advised to consult the troubleshooting section of the manual. Common issues may include incorrect installation of the air distribution box or duct divider, electrical connection problems, or compressor short-cycling due to improper setup.
In cases where the unit fails to start or operates erratically, users should check the power supply and ensure that all connections are secure. If the problem persists, professional assistance from a qualified technician is recommended.
Conclusion
The Dometic Brisk II is a versatile and high-efficiency rooftop air conditioning unit suitable for RVs, vans, and other mobile living spaces. Its installation requires careful attention to detail, adherence to safety guidelines, and proper setup of either a ducted or non-ducted configuration. By following the manufacturer’s instructions and using the appropriate components, users can ensure that their Brisk II operates efficiently and reliably for years to come.
Whether you are a DIY enthusiast or a professional installer, understanding the key steps and considerations outlined in this guide will help you achieve a successful and trouble-free installation. With its advanced design, lightweight construction, and improved performance, the Brisk II is a reliable choice for those seeking comfort and convenience in mobile living environments.