3. Charging Additional Refrigerant

Charging additional refrigerant (calculated from the liquid tube length as shown in Section "1-12. Installation Instructions, 1. Tubing Size, Table 1-2 Tubing Data for Models", Amount of additional refrigerant charge) using the liquid tube service valve. (Fig. 1-126)

Use a balance to measure the refrigerant accurately. If the additional refrigerant charge amount cannot be charged at once, charge the remaining refrigerant in liquid form by using the gas tube service valve with the system in Cooling mode at the time of test run. (Fig. 1-127)

*If an additional refrigerant charge has been performed, list the refrigerant tubing length and amount of additional refrigerant charge on the product label (inside the panel).

4.Finishing the Job

1. Specifications

 

Manifold valve

Pressure

Lo

Hi

gauge

Valve

Liquid

R410A

(1)With a hex wrench, turn the liquid tube service

1valve stem counter-clockwise to fully open the valve.

(2)Turn the gas tube service valve stem counter-clockwise to fully open the valve.

To avoid gas from leaking CAUTION when removing the charge hose, make sure the stem of the gas tube is turned all the way out (“BACK SEAT”)

position.

Close

Gas tube

Close

Liquid tube

Close

Outdoor unit

(3)

Loosen the charge hose connected to the gas

 

tube service port (5/16".) slightly to release the

 

pressure, then remove the hose.

(4)

Replace the 5/16". fl are nut and its bonnet on the

 

gas tube service port and fasten the fl are nut

 

securely with an adjustable wrench or box wrench.

 

This process is very important to prevent gas from

 

leaking from the system.

Fig. 1-126

(5) Replace the valve caps at both gas and liquid

service valves and fasten them securely.

Open

Gas tube

Open

Liquid tube

Open

Outdoor unit

Fig. 1-127

1-124

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Panasonic R410A service manual Charging Additional Refrigerant, Finishing the Job
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R410A specifications

Panasonic R410A is a refrigerant that has gained significant popularity in the air conditioning and refrigeration industry due to its favorable environmental properties and performance characteristics. Specifically designed to replace the harmful R22 refrigerant, which is being phased out due to its ozone-depleting potential, R410A offers a more eco-friendly alternative without compromising on efficiency or power.

One of the main features of R410A is its high energy efficiency. It operates at a higher pressure than R22, resulting in better heat transfer capabilities. This increased efficiency translates to lower energy consumption, making units using R410A more cost-effective in the long run. Additionally, R410A is known for its ability to provide excellent cooling performance even in high-temperature environments, making it suitable for a variety of applications, from residential air conditioning systems to commercial refrigeration units.

In terms of composition, R410A is a blend of two hydrofluorocarbons (HFCs), namely R32 and R125. This combination not only minimizes ozone depletion potential (ODP) but also reduces global warming potential (GWP) compared to older refrigerants. Panasonic has emphasized the importance of innovative technologies in its products, and R410A aligns perfectly with the company's commitment to developing sustainable solutions.

Panasonic also integrates advanced technologies to optimize the performance of R410A systems. For example, variable speed compressors, known as inverter technology, enhance system efficiency by adjusting the compressor's speed according to the cooling demand. This ensures that energy is only consumed when needed, further reducing operational costs.

Furthermore, R410A has a wide range of applications, including air conditioning systems, heat pumps, and chillers. Its versatility makes it a popular choice among manufacturers and consumers alike. The refrigerant is also compatible with existing R22 equipment, although specific retrofit procedures must be followed to ensure peak performance and reliability.

In conclusion, Panasonic R410A stands out as an innovative refrigerant choice in the HVAC industry, offering a combination of energy efficiency, environmentally friendly properties, and advanced technologies. As regulatory frameworks continue to tighten on greenhouse gas emissions, R410A and similar refrigerants are expected to play a crucial role in shaping a more sustainable future for air conditioning and refrigeration. Its high performance and lower environmental impact solidify its position as a leading refrigerant in contemporary cooling solutions.
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