Precautions for Packed Valve Operation

Do not use a spanner to tighten the valve stem caps. Doing so may damage the valves.

Depending on the installation conditions, applying excessive torque may cause the nuts to crack.

If the packed valve is left for a long time with the valve stem cap removed, refrigerant will leak from the valve. Therefore, do not leave the valve stem cap removed.

Use a torque wrench to securely tighten the valve stem cap.

Valve stem cap tightening torque:

Charging port	70 – 85 in.lbs (80 – 100 kgf • cm)

ø3/8" (Liquid side)	160 – 180 in.lbs (190 – 210 kgf • cm)

ø5/8" (Gas side)	240 – 270 in.lbs (280 – 320 kgf • cm)

3.Insulating the Refrigerant Tubing Tubing Insulation

1 Thermal insulation must be applied to all unit tubing, including the distribution joint (purchased separately).

*For gas tubing, the insulation material must be heat resistant to 248°F or above. For other tubing, it must be heat resistant to 176°F or above.

Insulation material thickness must be 13/32 in. or greater.

1. Specifications

Packed valve

Charging port

Valve stem

	Main valve
Valve stem cap
	Fig. 1-117
2 tubes arranged together
Inter-unit	Gas tube
control wiring	Liquid tube

Armoring tape

Insulation

Fig. 1-118

Sealer (supplied)

Insulation tape (white)

CAUTION

Taping the ﬂare nuts

If the exterior of the outdoor unit valves has been ﬁnished with a square duct covering, make sure you allow sufﬁcient space to access the valves and to allow the panels to be attached and removed.

(supplied)

	Flare insulator (supplied)
Unit side	Tube insulator
Unit side	(not supplied)
insulator	Heat resistant
	248°F or above

Flare nut

Vinyl clamps (supplied)

Fig. 1-119

Never grasp the drain or refrigerant connecting

Wind the white insulation tape around the ﬂ are nuts at the gas tube connections. Then cover up the tubing connections with the ﬂ are insulator, and ﬁ ll the gap at the union with the supplied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl clamps. (Fig. 1-119)

Insulation material

The material used for insulation must have good insulation characteristics, be easy to use, be age resistant, and must not easily absorb moisture.

After a tube has been insulated, CAUTION never try to bend it into a narrow

curve because it can cause the tube to break or crack.

outlets when moving the unit.

1-120

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.

Panasonic R410A service manual Precautions for Packed Valve Operation, Tubes arranged together

Models: R410A