Sanyo PW-UMR184EXH56, SPW-UMR94EXH56 Tube diameter Tightening torque Tube thickness Approximate

Page 13

Caution Before Connecting Tubes Tightly

(1)Apply a sealing cap or water-proof tape to prevent dust or water from entering the tubes before they are used.

(2)Be sure to apply refrigerant lubricant to the match- ing surfaces of the flare and union before connect- ing them together. This is effective for reducing gas leaks. (Fig. 5-4)

(3)For proper connection, align the union tube and flare tube straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 5-5)

Adjust the shape of the narrow tube (liquid tube) using a tube bender at the installation site and connect it to the narrow tubing side (liquid tubing side) valve using a flare.

Cautions During Brazing

Replace air inside the tube with nitrogen gas to prevent copper oxide film from forming during the brazing process. (Oxygen, carbon dioxide and Freon are not acceptable.)

Do not allow the tubing to get too hot during brazing. The nitrogen gas inside the tubing may overheat, causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing.

Use a reducing valve for the nitrogen cylinder.

Do not use agents intended to prevent the for- mation of oxide film. These agents adversely affect the refrigerant and refrigerant oil, and may cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and Out- door Units

(1)Tightly connect the indoor-side refrigerant tubing extended from the wall with the outdoor-side tub- ing.

(2)To fasten the flare nuts, apply specified torque as at right:

When removing the flare nuts from the tubing con- nections, or when tightening them after connecting the tubing, be sure to use 2 monkey wrenches or spanners as shown. (Fig. 5-6)

If the flare nuts are over-tightened, the flare may be damaged, which could result refrigerant leakage and cause in injury or asphyxiation to room occu- pants.

For the flare nuts at tubing connections, be sure to use the flare nuts that were supplied with the unit, or else flare nuts for R410A (type 2). The refriger- ant tubing that is used must be of the correct wall thickness as shown in the table at right.

Apply refrigerant lubricant here and here

Fig. 5-4

Union

Flare nut

Fig. 5-5

Torque wrench

Spanner

Indoor unit

Outdoor unit

Fig. 5-6

Tube diameter

Tightening torque,

Tube thickness

approximate

 

 

 

 

 

 

 

φ

6.35 (1/4")

14 – 18 N

· m

· cm)

0.8 mm

 

 

(140 – 180 kgf

 

 

 

 

 

φ9.52 (3/8")

34 – 42 N

· m

· cm)

0.8 mm

(340 – 420 kgf

 

 

 

 

 

φ

12.7 (1/2")

49 – 61 N

· m

· cm)

0.8 mm

 

 

 

(490 – 610 kgf

 

 

 

 

 

φ

15.88 (5/8")

68 – 82 N

· m

· cm)

1.0 mm

 

(680 – 820 kgf

 

 

 

 

 

Because the pressure is approximately 1.6 times higher than conventional refrigerant pressure, the use of ordinary flare nuts (type 1) or thin-walled tubes may result in tube rupture, injury, or asphyxi- ation caused by refrigerant leakage.

In order to prevent damage to the flare caused by over-tightening of the flare nuts, use the table above as a guide when tightening.

When tightening the flare nut on the narrow tube, use a monkey wrench with a nominal handle length of 200 mm.

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Contents Optional Controllers Outdoor UnitsSanyo Airconditioners Europe S.r.l …In a Room For safe installation and trouble-free operation, you must…In Moist or Uneven Locations …In an area with High WindsCheck of Density Limit Contents HOW to Install the Unit Duct for fresh air 16/18/22 Indoor unit Power supply Time delay fuse or Wire size General Precautions on WiringPower supply Time delay fuse or circuit capacity Use shielded wiring7P terminal board Wiring System DiagramsOutdoor unit Indoor unit How to connect wiring to the terminal For stranded wiring Flaring Procedure with a Flare Tool Connecting the Refrigerant Tubing Use of the Flaring MethodDeburring Tube diameter Tightening torque Tube thickness Approximate Two tubes arranged together Insulating the Refrigerant Tubing Tubing InsulationThree tubes arranged together Insulation materialTaping the Tubes Finishing the InstallationHow to clean the filter Care and CleaningName of Parts Indoor Unit Type PeriodTips for Energy Saving TroubleshootingEntretien et nettoyage Nom des pièces unité intérieureType Période Comment nettoyer le filtreEntretien avant une période d’inactivité prolongée Conseils pour économiser l’énergie Guide de dépannageChoses à faire Bezeichnungen der Teile Care and Cleaning Pflege und ReinigungTyp Zeitraum Reinigen des LuftfiltersZeit nicht verwendet werden soll Zeit nicht verwendet wurdeNützliche Hinweise für Energieeinsparung FehlersucheCura e manutenzione Nome delle parti Unità internaTipo Periodo Pulizia del filtroPrecauzione Suggerimenti per risparmiare energia Prima di chiamare il tecnicoCuidados e limpeza Nomenclatura das peças unidade interiorUnidade interior Pano macio e limpo Tipo PeríodoPrecaução Sugestões para poupar energia Resolução de problemasUMR Page Page Cuidados y limpieza Nombres de las partes unidad interiorCómo limpiar el filtro Precaución Sugerencias para ahorrar energía Localización de averías
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PW-UMR184EXH56, R410A, SPW-UMR74EXH56, SPW-UMR224EXH56, SPW-UMR164EXH56 specifications

Sanyo R410A is a refrigerant blend that has gained popularity in air conditioning and refrigeration systems due to its efficiency and environmental benefits. Comprised of two main components, difluoromethane (R-32) and pentafluoroethane (R-125), R410A is categorized as an HFC (hydrofluorocarbon) refrigerant. One of its main advantages is its zero ozone depletion potential, making it an eco-friendly alternative to older refrigerants like R22, which are being phased out due to their harmful effects on the ozone layer.

One of the key features of Sanyo R410A is its high efficiency, which translates to lower energy consumption in air conditioning applications. The thermodynamic properties of R410A allow for higher cooling capacity and reduced energy input, yielding higher seasonal energy efficiency ratios (SEER) compared to R22 systems. This efficiency is not just beneficial for users looking to save on energy bills, but it also contributes to a reduced carbon footprint.

The blend's higher pressure capabilities allow manufacturers to design more compact and lightweight systems, which can lead to better utilization of space in residential and commercial settings. These space-saving designs are often equipped with advanced technologies such as inverter-driven compressors, which adjust their operating speed based on the cooling demand, further enhancing system efficiency.

Sanyo R410A also features excellent thermal properties, providing effective cooling performance across a range of ambient temperatures. The refrigerant has a lower volatility compared to older alternatives, which contributes to improved system stability and reliability over time. Additionally, R410A does not contribute to global warming to the extent of previous refrigerants, although its global warming potential is still a consideration for the future.

Among its technological advancements, Sanyo R410A enables the use of innovative HVAC systems that employ enhanced heat exchange methods. These systems often include microchannel coils that improve heat transfer efficiency while reducing refrigerant charge. The compatibility of R410A with various components allows manufacturers to push the boundaries of design and functionality in climate control systems.

In conclusion, Sanyo R410A stands out due to its exceptional efficiency, environmentally friendly characteristics, and compatibility with advanced technologies. As the HVAC industry continues to evolve, R410A's features and properties position it as a reliable choice for modern air conditioning and refrigeration applications. Its adoption marks a significant step towards achieving greater energy efficiency and sustainability in climate control solutions.