Install The Outdoor Unit, Connect the Piping

Outdoor Unit Installation Guidelines

Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines below.

For any of the below installation patterns, the wall height on the exhaust side should be 47-1/4" or less.

10.2 Install The Outdoor Unit

After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.

1Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32").

2When installing at roof, please consider strong wind and earthquake.

Please fasten the installation stand firmly with bolt or nails.

Model	A	B	C	D

CU-2E18***	24-1/8"	5-5/32"	5/8"	14-3/16"

10.3 Connect the Piping

Remove the control board cover (resin) from the unit by loosening three screws

Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter.

Remove burrs from cut edge. Make flare after inserting the flare nut (locate at valve) onto the copper pipe.

Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.

Do not over tighten, over tightening may cause gas leakage

Piping size	Torque
1/4" [0.02 ft]	[18 N•m (13.3 lbf ft)]
3/8" [0.03 ft]	[42 N•m (31.0 lbf ft)]
1/2" [0.04 ft]	[55 N•m (40.6 lbf ft)]
5/8" [0.05 ft]	[65 N•m (47.9 lbf ft)]
3/4" [0.06 ft]	[100 N•m (73.8 lbf ft)]

Gas Leak Checking

Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system. If the pressure holds, release the nitrogen and proceed to section 10.4.

CU-2E18NBU specifications

The Panasonic CU-2E18NBU is a highly efficient outdoor unit designed for residential and commercial applications, providing reliable heating and cooling year-round. This unit is part of Panasonic's extensive range of HVAC solutions, known for their innovation and energy efficiency.

One of the standout features of the CU-2E18NBU is its advanced inverter technology. This technology allows the system to adjust the compressor speed based on the temperature demand, resulting in reduced energy consumption and enhanced comfort. By continuously varying the output, the inverter system maintains a consistent indoor climate without the frequent on/off cycles typical of conventional systems. This not only saves energy but also extends the lifespan of the unit.

The CU-2E18NBU is designed to operate efficiently in a wide range of conditions, showcasing excellent performance in harsh climates. With a capacity of 18,000 BTU, it can efficiently cool or heat spaces effectively, making it suitable for medium-sized rooms or multiple areas when paired with compatible indoor units.

Another significant characteristic of this Panasonic model is its environmentally friendly refrigerant, R32. This refrigerant has a lower impact on global warming and ozone depletion compared to older options, making the CU-2E18NBU a smart choice for eco-conscious consumers. R32 also enhances the system's efficiency, further contributing to lower energy costs.

The unit features a robust construction, allowing it to withstand outdoor conditions while promoting durability. Its compact design allows for flexible installation options, making it easier to fit in various environments without compromising aesthetic appeal.

Moreover, the CU-2E18NBU incorporates advanced air filtration and purification technologies, improving indoor air quality. The filters are designed to capture dust, allergens, and other particulates, ensuring cleaner, healthier air.

In summary, the Panasonic CU-2E18NBU stands out for its efficient inverter technology, environmentally friendly refrigerant, and compact, durable design. With its ability to provide consistent temperature control and improve indoor air quality, this unit is a reliable solution for anyone looking to enhance their heating and cooling systems.