Fedders R407C service manual IX. Sleep Function, Cool or auto-cool mode

Page 59

IX. Sleep Function

Sleep function is only selectable in manual operation, but it is not available in dry and fan modes. When this function is selected, the Indoor Fan immediately runs at low speed, all timer functions will be overridden and disabled at the same time.

In cool or auto-cool mode,

One hour after Sleep function is selected, the temperature set point will be raised by 1ºC. Two hours later, the set temperature will be raised by another 1ºC.

Eight hours after selection of Sleep function, the air-con will be switched OFF.

Set point + 2

Set point + 1

Set point

 

 

 

Air--------------------con OFF >

0 hour

1st hour

2nd

3rd hour 4th hour 8th hour

 

 

hour

 

Actions of Sleep function in cool mode

In heat or auto-heat mode (applicable on Heat Pump Unit only), one hour after Sleep function is selected, the temperature set point will be lowered by 1ºC.

Two hours later, the set temperature will be lowered by another 1ºC.

Eight hours after selection of Sleep function, the air-con will be turned OFF.

Set point

Set point - 1

Set point - 2

Air-con OFF

------------------->

Actions of Sleep function in heat mode

In auto-dry mode,

Eight hours after the selection of Sleep function, the air-con will be turned OFF.

When the air-con is switched OFF by the sleep function, it will not be turned on again unless explicitly switched on by the user.

This function can be de-selected if the "SLEEP" button is pressed again. It will also be de- selected if the mode of operation is changed or when the air-con is switched OFF.

F12

Page 58 Page 60
Image 59
Page 58 Page 60
Contents Fedders Page Section a Specifications Container Loading Section B Parts List and Exploded Views Fedders Large Split AIR CONDITIONERR407C Service Parts List Model Number Fedders Refrigerant Assembly Packaging Parts Page Page Page R407C Refrigerant ASSEMBLYCont Packaging Parts Page Page Page Page Section C Installation Split Type AIR Conditioner Installation Manual Contents Safety Precaution Part Lists Cutting The Pipe And The Cables Pipe Length, Elevation and refrigerant chargeFlaring of pipe Removing burrsLocating the indoor unit Installing the wall bracket & drilling the piping holeRouting the drain hose and tubing Removing The Decorative FrontSealing The Drain Hose And Tubing Drain hose Use caution When bendingAttaching The Unit To The Wall Bracket Wiring The Indoor UnitConnecting The Piping To The Indoor Unit Locating the outdoor unit Outdoor Unit InstallationConnecting The Pipe To The Outdoor Unit Installing The Outdoor UnitConnecting The Wires To The Outdoor Unit Removing air from the tubing and indoor unit Checking for gas leakageRestraining the piping Test RUN & Check Switch On The Power SupplyChecking The Unit Upon completion of installing and checking the unitSection D Trouble Shooting Page Symptom Diagnosis Remedy Section E Wiring Diagram Page Page Page Page Section F Technical Data Large Split Unit 18 / 24K Applicable on Heat Pump Unit II. Hand-held TransmitterMain Receiver Board III. Receiver ModuleLED Board LED IV. Operations of the electronic controllerStep Modes of Operation Cool Mode CycleHeat Mode Heat Pump Unit only VII. Auto Fan Function VI. Temperature Control and MeasurementIndoor Fan Speed VIII. Vane Function IX. Sleep Function Cool or auto-cool modeON-OFF-ON Operation Timer FunctionXI. Device Protection Measures Heat mode protection applicable on Heat Pump Unit onlyHeat Mode Cycle 10C Indoor coil Temperature 2C Compressor Fan Min 10 min Defrosting in Heat mode applicable on Heat Pump Unit only Defrost Time Chart Heat Overload Protection Algorithm XII. Thermistor fault indicationXIII. Self Test XIV. Memory Backup of SettingsF21 F22 F23 F24 F25 F26 F27 F28

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.
Top Page Image Contents