10.1.4.2.4Gas 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 10.1.4.3.

10.1.4.3Evacuation of the equipment

When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedures.

1.Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.

2.Connect the micron gauge between vacuum pump and service port of outdoor units.

3.Turn on the power switch of the vacuum pump and make sure that connect digital micron gauge and to pull down to a value of 500 microns.

4.To make sure micron gauge a value 500 microns and close the low side valve of the charging set and turn off the vacuum pump.

5.Disconnect the vacuum pump hose from the service port of the 3-way valve.

6.Tighten the service port caps of the 3-way valve at a torque of 13.3 Ibf.ft with a torque wrench.

7.Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “Open” using a hexagonal wrench (5/32”).

8.Mount valve caps onto the 2-way valve and the 3-way valve. o Be sure to check for gas leakage.

10.1.4.4Connect the Cable to the Outdoor Unit

1.Remove Top panel.

2.Remove Control Board Cover (Resin and Metal).

3.Remove Plugs.

4.Fix the conduit connectors to the knockout holes with lock-nuts, then secure them against the side panel.

5.All wires pass through conduits.

6.Connecting wire between indoor unit and outdoor unit should be UL listed or CSA approved 4 conductor wires minimum AWG16 in accordance with local electric codes.

7.Wire connection to the power supply (208/230V 60Hz) through circuit breaker.

o Connect the UL listed or CSA approved wires minimum AWG14 to the terminal board, and connect the other end of the wires to ELCB / GFCI.

8.Connect the power supply cord and connecting wire

between indoor unit and outdoor unit according to the diagram below.

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Panasonic CU-S12NKU-1, CS-S18NKU-1, CS-S12NKUW-1, CS-S22NKU-1, CS-S9NKUW-1, CU-S9NKU-1, CU-S22NKU-1 Gas leak checking
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CS-S9NKUW-1, CS-S22NKU-1, CU-S18NKU-1, CS-S18NKU-1, CS-S12NKUW-1 specifications

Panasonic has long been a leader in the HVAC industry, and its latest range of air conditioning units—including the CU-S9NKU-1, CU-S12NKU-1, CU-S22NKU-1, CS-S12NKUW-1, and CS-S18NKU-1—showcases innovative features and robust technologies designed to enhance home comfort while reducing energy consumption.

The CU-S9NKU-1 model is notable for its compact design, making it ideal for smaller spaces without sacrificing performance. It boasts advanced inverter technology, enabling precise temperature control and energy efficiency. The built-in air purification system ensures that indoor air quality remains high, filtering out allergens and pollutants.

Similarly, the CU-S12NKU-1 variant provides a balance of power and efficiency for medium-sized rooms. This model incorporates a quiet operation feature, making it a perfect choice for bedrooms and living areas where noise levels need to be minimized. The adjustable airflow louvers ensure that air is distributed evenly throughout the space.

For larger spaces, the CU-S22NKU-1 stands out with its high cooling and heating capacity. This model is equipped with a dual inverter compressor that enhances both efficiency and performance, providing rapid cooling or heating when needed. The user-friendly remote control and smart connectivity options allow homeowners to adjust settings conveniently, even when they’re away from home.

The CS-S12NKUW-1 model features a sleek design and additional functionalities like the Eco Mode and Sleep Mode. Eco Mode adjusts the power consumption based on the user’s preferences, while Sleep Mode operates at low noise levels, promoting a restful environment during nighttime hours.

Lastly, the CS-S18NKU-1 combines innovative technology with aesthetic appeal. Its modern design is meant to complement contemporary interiors, and its high seasonal energy efficiency ratio (SEER) indicates strong performance in cooling seasons. Additionally, this model includes several energy-saving modes that adapt to changing thermal loads, ensuring that energy wastage is minimized.

Overall, Panasonic’s CU and CS series air conditioning units offer an impressive blend of technology and design, making them suitable for various needs and spaces while focusing on energy efficiency and user comfort. Whether for residential or light commercial use, these models provide reliable, effective solutions for climate control.
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