Digital Control Energy Saving Digi-Eco RKED (Air Cooled) Both Energy Savings AND Precision Control, even under low loads.


Cooling Capacity
Operable Ambient Temperature Range
-5 to 43℃
Operable Liquid Temperature Range
5 to 35
Temperature Control Precision
±1.0℃ (during periods of a stable load: ±0.5 ℃)


Digital Compressor Control for an Additional 65% in Energy Savings

Thanks to our original digital control (LOAD/UNLOAD) technology, we have achieved high-efficiency energy savings across the full range of loads from 0% to 100%.

Safe and Reliable Design

The RKED Series inherits its primary functionality from ORION chillers which have been receiving high marks from our customers. And thanks to simplified structural components, we've achieved a highly reliable chiller suitable in a wide variety of applications.

External communications interface included as standard equipment.

Allows temperature control via RS232C or RS422 interfaces.


The following page shows application examples of the our Digi-Eco Chillers. Have a look!


Air Cooled
Cooling Capacity (50/60 Hz) ※1 kW 29.2/31.4
Operable Ambient Temperature Range -5 to 43
Operable Liquid Temperature Range 5 to 35
Control Precision ※4 ±1.0 ℃ (during periods of a stable load: ±0.5 ℃)
Power Source ※2 V(Hz) Three-phase 200±10% (50/60), 220±10% (60)
Power Consumption
(50/60Hz, 220V) ※1
kW 14/17、17
Electric Current
(50/60Hz, 220V) ※1
A 45/52、52
Power Capacity ※3 kVA 20
Breaker Capacity A 75※7
Chiller Compressor Output kW 7.09
Condenser Fin and tube forced air cooling
Heat Exchanger Construction Plate type heat exchanger
Material SUS316 grade stainless steel (brazing: Cu)
Discharge Pump ※5 Output kW 2.2
Flow Rate
(50/60 Hz)
L/min 60/125
(Head: 50 m)
Fan Motor Output W 750 (Inverter driven)
Water Tank Capacity L Approx. 95
Refrigerant Control Method Electronic expansion valve
(controlled by stepping motor)
Refrigerant R407C
Charged Amiunt kg 4.5
External Dimensions (H×D×W) mm 1800×850×1200
Unit Mass (dry weight) kg 435
Operating Noise Level (50/60 Hz) ※6 dB 69/71
  1. When operating under these conditions: chilled water temperature is 20℃, ambient temperature is 32℃, cooling water temperature is 32℃. Cooling capacity is at least 95% of listed figures.
  2. Source voltage phase unbalance should be less than ±3%.
  3. The figure noted is when the equipment is operating at the hirhest capacity of its normal operating range.
  4. Stable load indicates continued operation with maximum load fluctuations of ±10% of the current load.
  5. The capacity figures listed represent just one point on this model's flow-rate / head characteristic curve. Pumps differ between model's; for model specifif details, please refer to the pump characteristic curves.
  6. Operating noise levels are from a position of 1 m in front of the product and at a height of 1m in front of the unit and at a height of 1m.
  7. Unit comes with a built-in multi-purpose overload and short circuit protection breaker.
  1. The recommended liquid (chilled water) that can be used is either clean water or a 30% to 40% industrial-use ethylene glycol solution. Alternatively, if deionized water is used, it should have an electrical conductivity of at least 1µS/cm.
  2. Please install the included strainer (40 mesh) to the liquid intake port.
  3. Heat output of the equipment (in kW) is about 1.3 times the cooling capacity.

External Dimensions (Units: mm)


Cooling Capacity
Chilled Water Flow Rate
  • To estimate the evaporater head loss, the external piping resistance to the evaporater head loss and read the flow rae and pressure accordingly.