HEATING OPERATION

•Use the device for heating when the outdoor temperature is under 21°C.

When it is too warm (over 21°C), the heating function may not work in order to protect the device.

•In order to keep reliability of the device, please use this device above -10°C of the outdoor temperature.

1

2

Press the FUNCTION selector so that the display indicates (HEAT).

Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting).

(AUTO)

: The fan speed changes automatically according

 

 

to the temperature of the air which blows out.

(HI)

:

Economical as the room will become warm

 

 

quickly.

 

 

But you may feel a chill at the beginning.

(MED)

:

Quiet.

(LOW)

:

More quiet.

3

START

STOP

Set the desired room temperature with the TEMPERATURE buttons (the display indicates the setting).

The temperature setting and the actual room temperature may vary somewhat depending on conditions.

Press the (START/STOP) button. Heating operation starts with a beep. Press the button again to stop operation.

OAs the settings are stored in memory in the remote controller, you only have to press the (START/STOP) button next time.

ODefrosting

Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit, for 5~10 minutes each time.

During defrosting operation, the operation lamp blinks in cycle of 3 seconds on and 0.5 second off. The maximum time for defrosting is 20 minutes.

(If the piping length used is longer than usual, frost will likely to form.)

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Hitachi RAS-25YHA / RAC-25YHA RAS-35YHA / RAC-35YHA INDOOR UNIT instruction manual Heating Operation, Auto
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RAS-25YHA / RAC-25YHA RAS-35YHA / RAC-35YHA INDOOR UNIT specifications

Hitachi RAS-25YHA and RAS-35YHA indoor units represent cutting-edge technology in the world of air conditioning, designed to offer efficient cooling and heating solutions for residential and commercial spaces. These models prioritize comfort, energy efficiency, and advanced functionalities, making them ideal choices for modern living environments.

One of the prominent features of the RAS-25YHA and RAS-35YHA models is their robust energy efficiency. These units utilize advanced inverter technology, which allows the compressor to adjust its speed based on the cooling or heating demands of the space. As a result, users benefit from lower energy consumption and reduced electricity bills, while maintaining optimal temperature levels.

The sleek and compact design of the indoor units ensures they blend seamlessly into various interior styles. The units are available in a range of colors, catering to diverse aesthetic preferences while maintaining a minimalist look. This design not only enhances the overall appearance of the space but also maximizes airflow performance.

Both models are equipped with Hitachi’s innovative filter technology, which works to purify the air inside the environment. The filters effectively capture dust, allergens, and other particles, ensuring that occupants breathe cleaner and healthier air. Regular filter maintenance is simple, which adds to the overall convenience of using these units.

Another key feature is the quiet operation of the RAS-25YHA and RAS-35YHA. With specially designed fan blades and sound-dampening technology, these indoor units produce minimal noise, allowing users to enjoy a peaceful atmosphere whether at home or in the workplace.

The user-friendliness of these air conditioning units is enhanced by a remote control and an intuitive interface. Users can easily adjust the settings, change the modes, and schedule operations according to their convenience.

In summary, the Hitachi RAS-25YHA and RAS-35YHA indoor units are exemplary models that showcase advanced air conditioning technology. With their energy-efficient inverter systems, sleek designs, effective air purification, quiet operation, and user-friendly controls, they are an excellent investment for those seeking reliable and efficient climate control solutions in their spaces.
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