Fan Operation (Front Panel Mode)

Heat – Cool – Auto – Fan Only

Models starting with SS, SM have 4 speeds. Models with SL, and all Kuhl+ have 3 speeds

 

 

 

 

 

 

Speed Selection

 

 

 

 

1

2

3

4

AUTO

 

 

 

 

 

 

 

 

AUTO Operation, but never

 

 

 

 

 

 

 

 

turns Off. Uses cool set point

 

Continuous

 

 

 

 

or heat set point vs. ambient

 

 

 

 

 

temperature. When there is

 

 

 

 

 

 

 

 

Fan

 

 

 

 

 

 

 

no demand, operate at the

 

 

 

"On" "

On"

"On" "

On"

lowest available speed.

 

 

 

Turns

Turns

Turns

Turns

 

 

 

 

 

 

 

 

 

 

On or

On or

On or

On or

AUTO operation turns On or

 

AUTO

Off with

Off with

Off with

Off with

Off with heat or cool demand

 

heat or

heat or

heat or

heat or

Uses cool set point or heat

 

 

 

 

 

 

 

 

cool

cool

cool

cool

set point vs. ambient

 

 

 

 

demand

demand

demand

demand

temperature

Mode

 

Fan Only

 

"On" "

On"

"On" "

On"

Disabled

Table

Fan ICON Detail

The system may have a 3 or 4 speed fan. The Fan Speed ICON will Display as per the table below.

Note that in the AUTO mode, the speed of the fan will be shown by illuminating the number of bars in the speed triangle.

Fan Mapping

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Image 29
Friedrich R-410A service manual Fan Mapping

R-410A specifications

Friedrich R-410A is an advanced refrigerant widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, known for its high efficiency and environmental friendliness. As a hydrofluorocarbon (HFC) blend, R-410A has become the preferred alternative to R-22, which is being phased out due to its ozone-depleting potential. One of the main features of R-410A is its high latent heat of vaporization, which allows for efficient heat transfer and improved cooling performance in air conditioning units.

Technologically, R-410A operates at higher pressures than older refrigerants, meaning systems designed for R-410A need to be built with more robust components to safely handle these pressures. This results in a more compact system design that offers enhanced performance and reliability. The dual-component nature of R-410A—composed of difluoromethane (R-32) and pentafluoroethane (R-125)—provides an optimal balance of thermodynamic properties, leading to superior energy efficiency, especially in variable speed applications.

In terms of characteristics, R-410A has a higher cooling capacity, which enables HVAC systems to effectively cool larger spaces or run more efficiently when cooling smaller areas. The refrigerant is non-toxic and non-flammable, which enhances safety during its use. In addition, R-410A has a lower global warming potential relative to other refrigerants, making it a more environmentally responsible choice for modern cooling systems.

Moreover, R-410A systems typically require less refrigerant charge due to their efficiency, contributing to reduced greenhouse gas emissions. The adoption of R-410A aligns with regulatory trends aimed at minimizing the environmental impact of refrigerants in cooling applications.

Overall, the Friedrich R-410A refrigerant embodies a combination of technology and environmental stewardship, making it a cornerstone of contemporary HVAC design. Its ability to provide effective and energy-efficient cooling solutions while being compliant with modern environmental regulations positions R-410A as the refrigerant of choice for engineers and installers focused on sustainability and performance in air conditioning systems.