Hitachi Rc6800s Manual

							MADE IN HITACHI
Intelligent Fridge. Made to Last. 
						

							Combining futuristic technology with exquisite craftsmanship, Hitachi’s iconic eco refrigerator presents a spectacular 
showcase  of  Japanese  innovation  and  design  finesse. The  time-defying  Photocatalyst  Preservation  intelligently  alters 
the  atmosphere  in  the  fridge  to  retain  food’s  freshness  and  nutrient  level  for  even  longer. Together  with  the  premium 
Vacuum  Compartment, Vitamin  Case  and  advanced  eco  features,  the  ground-breaking  refrigerator  reflects  the  finest 
fusion of form and function. True Japanese quality, only at Hitachi. 
						

							HITACHI ORIGINAL ADVANCED VACUUM COMPARTMENT
*1  Operates only when the Vacuum Compartment is set to “Auto” mode.
Hitachi’s  Made  In  Japan  6-door  refrigerator  now  features  the  new  Photocatalyst  Preservation 
technology in the premium Vacuum Compartment to preserve food’s freshness for even longer. 
Together with the Vitamin Case and intelligent auto temperature and cooling period adjustments*
1, 
the fridge can now achieve the perfect level of convenience in food storage. 
						

							Approx. 55cm Wide*2
Designed  with  combined Vacuum  Preservation  and Vitamin  Case,  the  refrigerator  promotes  nutrients  retention  and  colour  preservation. The Vacuum  Preservation  of  approximately  0.8hPa  capability    
reduces oxidation of nutrients, while the Vitamin Case releases antioxidant vitamins to enhance nutritional value \
of food.
VITAMIN CASE IN VACUUM COMPARTMENT
Approx.0.8hPa
Vitamin Case 
Releases Antioxidant 
VitaminsTemperature Sensor
Small Vacuum Pump
• CO
2 Sensor 
• Pressure Sensor
• Volume SensorLED Light
Reduction of oxygen retains 
nutrients and preserves freshness Vacuum Compartment
02
02
02
02
02
0202
02Nutrients
which are  easily 
oxidised
Oxidation and loss of 
nutrients occur easily
Conventional Compartment
020202
02
02
0202
020202
Press down to lock / Pull up to unlock
Aluminum Tray
The Aluminum Tray  chills  faster  and  defrosts  food  at  a  higher  speed  to  prevent  dripping, 
which helps to retain food’s original taste and nutrients level.
HIGH SPEED CHILLING WITH ALUMINUM TRAY
*2  Only for model R-C6800S.
Nutrients
which are  easily 
oxidised    
						

							When exposed to light in the Vacuum Compartment, 
Ethylene gas and odour will be dissolved into 
carbon dioxide.
*3  Photocatalyst Preservation is useful for deodorant and anti-bacteria.
*4  Carbon dioxide is a useful component in Preservation Technology, it delays loss of freshness by suppressing vegetable breathing and control the action of an enzyme that resolves proteins (inhibiting the action of oxygen on the surface of fish and meat).
The newly developed Photocatalyst Preservation*3 is the latest innovation in food preservation technology. It uses an LED light to generate 
carbon dioxide*4 in the Vacuum Compartment, which controls the atmosphere in which fruits and vegetables are kept. Together with a powerful 
Deodorant by Photocatalyst Preservation that can dissolve 6 kinds of odour, the refrigerator is the most potent food preservation system to date. 
PHOTOCATALYST PRESERVATION IN VACUUM COMPARTMENT
Due  to  the  presence  of  carbonic  acid  gas,  the  surfaces  of 
fish and meat become slightly acidic. Similar to the action of 
reducing an enzyme that breaks down the protein, it suppresses 
the loss of freshness.
Fish/Meat
When  the  suppressed  breathing  pores 
(Stoma)  of  the  vegetables  are  closed  in 
response to carbon dioxide, loss of nutrients 
is reduced.
Vegetable
Convenient usage for storage compartments
Preserve unfinished foodDefrost meat items
Prepared food can be stored
for easy serving
Preserve food’s taste and smell
Maintain freshness 
in dairy productsMaintain freshness
in meat items
Odours from meat, fish and Ethylene gas component 
from vegetables are brought into contact with the 
Photocatalyst when stored in the Vacuum Compartment.
Odour Ethylene LED light
Photocatalyst 
Preservation
CO2H2O
resolve
OdourEthylene 
Carbon dioxide is generated in the 
Vacuum Compartment that slows down
the metabolic process.
CO2 
						

							Approx.+1°C
CO2 is emitted by vegetables
When vegetable is present, CO
2
 is detected and temperature changes.
Set Temperature Automatically
OPTIMUM TEMPERATURE IN VACUUM COMPARTMENT
The Vacuum  Compartment  with  optimum  temperature  setting  of  approximately  –1ºC/+1ºC  can  be  automatically  adjusted  to  achieve  ultimate  freshness.  Once  CO2  is  present  in  the Vacuum  
Compartment, the temperature will be adjusted automatically to maintain the best condition for nutrients to be preserved*5. Food items can stay fresh longer without losing its original taste and 
texture, and will not freeze.
With vegetables present With only meat, fish or 
processed food
Vacuum Sub-zero Mode
Vacuum Chiller Mode
Approx.–1°C
No CO2
*5  Operates only when the Vacuum Compartment is set to "Auto" mode.       
						

							Food can stay fresh longer when it is stored at its ideal temperature. With Photocatalyst Preservation and Optimum Temperature settings in the Vacuum Compartment, food items can be stored 
longer without losing its original freshness and nutrient level.
PHOTOCATALYST PRESERVATION AND OPTIMUM TEMPERATURE
Note: Vacuum Chiller mode and Sub-zero mode cannot be used at the same time. 
*K Index of freshness.
Vacuum Sub-zero Mode (Approx. -1°C) Vacuum Chiller Mode (Approx. +1°C) 
Chilled FoodFermented FoodFood with M oistureSalad, Freshly-cut 
V egetables and F ruits
MeatProcessed MeatProcessed FishFish
 FRESHNESS retention
*K value in C
hicken (After 3 days)
Compared to storage in conventional compartment
*K value in Tuna (After 3 days)
Compared to storage in conventional compartment
Approx. 11 % 
more retention
Initial
Amount
Conventional
Compartment Photocatalyst
Preservation Sub-zero
¢Ë£
2 6. 4
43.7
33.0Approx. 3% 
more retention
Initial
Amount
Conventional
Compartment Photocatalyst
Preservation Sub-zero
¢Ë£
11 .416.713.6
Vitamin C in Cabbage (After 3 days)
Compared to storage in conventional compartment
Vitamin E in Bell Peppers (After 3 days)
Approx. 12 % 
more retention
Photocatalyst Preservation Sub-zero
Initial
Amount
Conventional
Compartment
34.3
28.3 31.7
Photocatalyst
Preservation Sub-zero
Initial
Amount
Conventional
Compartment
2.85
2.25 2
.74
Approx. 22% 
more retention
 NUTRIENT ( Vitamin C and E) retention
Compared to storage in conventional compartment 
						

							2008
R-X6000S 2011
R-A6200S 2012
R-B6200S
851kWh/yr**
2009
R-Y6000S
68 9kWh/yr**
485kWh/yr**511kWh/yr**489kWh/yr**
409kWh/yr**
15.6% *saving
Approx.
29.5%
*saving
Approx.
 19%
*saving
Approx.
2012
R-B6800S 2013
R-C6800S
4% *saving
Approx.
*  
kWh energy consumption comparison between six Hitachi models.  
**   Figures extracted from NEA website.
ENERGY SAVING  TECHNOLOGY
A  mark  of  Hitachi’s  environmental  commitment,  the  C-series  refrigerator  combines  an  array  of  advanced  environmental  innovations  to  achieve  complete  eco-efficiency.  During  the  process  of
Frost Recycling Cooling, the compressor switches off automatically when the chilled conditions are optimised. Frost formed on the generator is then recycled to keep temperature low even when the 
compressor is not in use. Together with the High-efficiency Compressor and Insulation system, the refrigerator is able to run efficiently on greatly reduced electricity consumption. 
Annual Energy
Savings in
kWh per year
Annual Energy Consumption ChartTotal savings  approx.
 42.5%*
+63L 
						

							Conventional Model
Refrigerator
 Compartment
Compressor Compressor
New Model R-C6800S
Freezer
 Compartment
Vegetable
 Compartment Refrigerator
 Compartment
Freezer
 Compartment
Vegetable
 Compartment
In conventional cooling systems, frost that formed on the evaporator would simply be melted and discarded by switching off the compressor. With Hitachi’s Advance Frost Recycling Cooling technology, 
the frost formed on the evaporator is fully utilised. The cool air generated by the frost is used for recycling by sending it through the refrigerator and vegetable compartments, thus enabling full cooling 
effect to take place even when the compressor is not running.
ADVANCE FROST RECYCLING COOLING TECHNOLOGY
The evaporator is thicker, thus expanding 
the area of heat exchanger which makes  
Advance  Frost  Recycling  Cooling
more effective.
When compressor is on, 
normal cooling operation 
is taking place.
Evaporator
Flap for Refrigerator  Compartment
OPEN
Flap for each 
compartment
OPEN
When compressor is off,
cool air from frost is generated 
by fan and sent through the 
compartments.
Evaporator
OPEN
Flap for Refrigerator  Compartment
OPEN
CLOSE
Flap for each 
compartment  
						

							The  Eco  Intelligent  Control  featuring  the A.I.  Inverter,  Flaps  and  Sensors,  and  Refrigerant 
Valve further enhances efficient energy saving compared to other conventional compressor 
refrigerators. This  unique  combination  of  Hitachi’s Original  Vacuum I nsulation P anel  and 
Advance  Frost  Recycling  Cooling  Technology  also  helps  to  make  the  refrigerator  more 
efficient in chilling food effortlessly.
ECO INTELLIGENT CONTROL
A.I. INVERTER
A  highly  efficient  Inverter-controlled  compressor  ensures  stable  operations  in  low  to  high 
speed operation.
Compressor
ADDITIONAL INTELLIGENT FLAPS AND SENSORS
The  additional  Intelligent  Flaps  and  Sensors  in  the  refrigerator,  freezer  and  vegetable 
compartments  detect  temperature  atmosphere  on  the  upper  and  middle  shelves  separately 
based on food items stored to achieve ideal cooling atmosphere at all times*
6. 
*6   When more food is stored on the upper shelf, the additional sensor will detect and chill only the upper shelf, vice versa for the middle shelf. When both the upper and middle shelves are filled with food items, two sensors will work simultaneously to open both flaps to achieve the ideal chilling temperature.
Flap For Refrigerator
Compartment Temperature Sensor
Door Sensor
Flap For Freezer 
Compartment
Evaporator
Refrigerant Valve
Refrigerator   
Compartment
Freezer   
Compartment
Vegetable   
Compartment Exclusive Flap For 
Vegetable Compartment
4 INTELLIGENT FLAPS
Additional Temperature Sensor
Additional Flap For 
Temperature Sensor
R-C6800S