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Fedders R407C service manual VIII. Vane Function

Models: R407C

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VIII. Vane Function

1.Vane Position

HOME

The vane will be at this position whenever the air-con is off. Its exact

 

angle is 115° counter-clockwise from position 3.

POSITION 1

The vane plane is positioned 70° counter-clockwise from position 3. cool,

 

dry and fan modes default vane position.

POSITION 2

The vane plane is 50° counter-clockwise from position 3.

POSITION 3

The vane plane is vertical (Heat mode default vane position).

NB. For the vane position discussion, view the vane from the left side of the air-con indoor unit.

2.Vane Control

When the Air-con is first switched ON in manual operation, the vane will move to the position indicated on the hand-held transmitter.

When the Air-con is first powered up, or when the air-con is switched OFF either by toggling the POWER ON/OFF button in manual operation or by pushing the operation/ filter reset button to OFF position, the vane will be moved to HOME position so that the air flow outlet is completely closed.

In manual operation, the vane can be set to position 1, position 2 and position 3, or made to swing using the hand-held transmitter. If the user does not wish to control the vane position, the Auto Vane function can be chosen.

In automatic operation, the auto vane function is always chosen. The vane will thus move to the default vane position according to the mode of operation selected.

3.Auto Vane function.

Auto vane function automatically moves the vane to an optimum position according to current mode of operation.

If Auto Vane function is selected in cool, dry or fan mode, the vane is moved to position 1. Whereas in heat mode, the vane is moved to position 3.

4..Vane Swing Function

The Vane Swing function can only be selected in manual operation. When selected, the vane moves to and fro between position 1 and position 3 continuously.

This function will be de-selected if the "SWING" button is pressed again, if the mode of operation is changed, if the Air-con is switched OFF, if the fan is OFF or if the ON timer is activated. The vane will then return to the last position before the selection of swing function unless the air-con is switch OFF.

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Page 58
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Fedders R407C service manual VIII. Vane Function
Page 57 Page 59

R407C specifications

Fedders R407C is a commonly used refrigerant that has made significant strides in the air conditioning and refrigeration industries. Developed as a replacement for R22, R407C blends three refrigerants: R32, R125, and R134a. This combination gives it versatile applications and makes it a popular choice in residential and commercial systems.

One of the main features of R407C is its zero ozone depletion potential (ODP). This is crucial in an era where environmental regulations are stricter and focus on reducing substances that could harm the ozone layer. R407C also boasts a relatively low global warming potential (GWP) compared to other refrigerants, which aligns with the growing demand for low-impact environmentally friendly solutions.

Technologically, R407C is compatible with many existing systems, particularly those designed for R22, making it a favored transitional refrigerant during the phase-out of ozone-depleting substances. However, it is vital to note that R407C operates at a higher pressure than R22, meaning that certain system components may need upgrading to ensure optimal performance and safety.

In terms of thermodynamic characteristics, R407C has a refrigerating effect similar to R22, making it efficient for cooling purposes across various applications. It has good heat transfer properties, which translates to efficient energy use in both residential and commercial installations. The refrigerant operates effectively across a broad temperature range, making it an ideal choice for air conditioners, heat pumps, and chillers.

Moreover, R407C is a near-azeotropic blend, which implies that it maintains its composition during evaporation and condensation. This characteristic helps in minimizing the risks of refrigerant fractionation, allowing for consistent performance over time.

Another noteworthy aspect of Fedders R407C is its favorable safety profile. It has a lower toxicity level compared to some other refrigerants, which enhances its suitability for varied applications. Additionally, it is non-flammable under normal conditions, making it a safe option for different installations.

In conclusion, Fedders R407C is characterized by its environmental safety, excellent thermodynamic qualities, and compatibility with existing refrigeration systems. As industries strive to meet new environmental regulations, R407C serves as a reliable option, providing performance without compromising on ecological concerns. Its pivotal role in transitioning to greener alternatives makes it a critical refrigerant in today’s climate-conscious market.