Heavy Duty DC Inverter Chiller
RKE-B (74.4 to 96.0 kW)
Energy-Saving Specs are Top Class in the World! Introducing the RKE-B Series Top-Class Models

RKE22000B-V / RKE30000B-V

Cooling Capacity
74.4 to 96.0 kW
(Air Cooled)
Operable Ambient Temperature Range
-20 to 45 °C
(Air Cooled)
Operable Liquid Temperature Range
3 to 35 °C
Temperature Control Precision
  • TESC Built In! Three Eco Speed Control offers the ultimate eco-operation!


TESC (Three Eco Speed Control) Built In

The changes in the energy consumption rate follow changes in the load factor. Thanks to TESC being built into the RKE-B Series, it offers even further reductions in power consumption over previous models.

Compressor Speed Control

DC Inverter Drives with Automatic Optimized Operation Judgement.

Fan Speed Control

Automatic Optimized Operation Judgement from the Inverter.

Pump Speed Control

Operates at the minimum speed needed to achieve the required flow rate. Reduces water supply waste.

Power Consumption Rate
  • The rate of power consumption is a value based on 100% being the RKL-3750V-C1 operating at its rated power consumption (7.6kW), at 60Hz, under the rated operating conditions.

Our units can maintain control at low loads that were previously difficult to work with and as the graph shows, even compared with previous inverter driven chillers, we've achieved energy savings!

Supports Linking of Multiple Units
As many as 4 units can be connected

Using our Central Chiller Controller, centralized operation of up to 16 units is possible.

  • Optional Equipment
Supports Linking of Multiple Units
Linked Model Example (Number of units)
HP Cooling Capacity
30 74 1 -
40 96 - 1
60 148 2 -
80 192 - 2
100 244 2 1
120 288 - 3
160 384 - 4
Energy Saving

Reduced Energy Consumption Thanks to our DC inverter Drive Compressor

Low Operating Noise

Operating noise of just 65 dB with our low-noise fan and compressor-noise-prevention cover.

Pump is also Inverter Driven
Inverter Drive for the Compressor,
Fan, and Now Also the Pump!

Being able to achieve just the required flow rate eliminates waste, even without bypass-valve control.

Pump is also Inverter Driven
Choose the Desired Pump Control Method

In addition to setting the operating frequency, it is also possible to set the flow rate based on an estimated flow rate standard, or set the water pressure. Operation possible at the optimum flow rate or pressure in accordance with the load.

  • The noted flow rate is a calculated value. The actual flow rate may differ. If an exact measured flow rate is required, then an external (user supplied) flowgauge should be installed.
Intelligent Touch Panel

Various settings and operating conditions can be visually and intutively chaecked and operated via the touch panel controller. The displayed language cn be changed to English, Japanese or Chinese.

Intelligent Touch Panel

Graph Display

Graph Screen

Touching the "Measured Liquid Temp." button will change the display to the Graph Screen where changes in liquid temperature will be graphed over a particular time period (up to 53 hours) in order to better aid in liquid temperature management.

Unit Operating Rate (Power Indicator)

Power Indicator

The compressor operating state is indicated on a 10 level ber graph which shows the level of energy saving at a glance.
Touching the "Op. rate" button brings up the Monitor Screen where operating conditions can be easily checked.

Measured Pressure

Touch "Measured Pressure" to change the discharge pump control option between frequency, flow rate, and pressure.


Touching "Menu" will bring up a menu of useful functions for easy confirmation and setting of Parameters, Alarm Histry, Main Components, Accumulated Time, Time Function, etc.

Timer Setting

Touching "0:00" on the display allows stop and start timesto be set. Actions can be repeated or set according to the day.

Easy Maintenance / Alarm Display

Alarm Display

Alarm numbers are displayed when alarm conditions occur.
Touching the "Details" will show details about the alarm and suggestions on how to deal with it.

The display language can be changed.

Operation and Monitoring via PC or Sequencer Possible

Communications functions can be utilized through a control program to match your specific application.

Communications Method

USB: 1 Unit, RS-422A: 32 Units, RS-485: 32 Units

Items that can be controlled via PC
  • Starting and stopping of individual chiller units.
  • Individual operation of chiller discharge pumps.
  • Liquid temperature control of individual chillers.

Detailed display functions enable quick recovery!

  • Inspection Warning
  • Liquid Temperature Warning
  • Water Pressure
  • Refrigeration Circuit
  • Inverter etc.


Model RKE22000B-V RKE30000B-V
Cooling Capacity※1 kW 74.4 96.0
Heating Capacity※8 kW 16.0 20.0
Operable Ambient
Temperature Range
–20 to 45
Operable liquid
Temperature Range
3 to 35 (w/ brine: 0 to 35)※7
Control Precision※4 ±0.1 (Energy saving mode: ±2.0)
Operable Flow Rate Range L/min 200 to 460
Power Source※2 V(Hz) Three-phase 200 to 220 ±10% (50/60)
Power Consumption kW 23.9 37.2
Electric Current※1 A 73.6 114.9
Power Capacity※3 kVA 34.1 43.3
Breaker Capacity※6 A 125 175
Operation Control Method Compressor speed control
Compressor Construction Fully sealed scroll type
Output kW 7.46 × 2
(Inverter driven)
11.19 × 2
(Inverter driven)
Condenser Fin and tube forced air cooling
Heat Exchanger Construction Plate type heat exchanger
Material SUS316 (Brazing: Cu)
Dischage Pump Construction Multistage centrifugal immersion type
Output kW 4.0 × 2 (Inverter driven)
Fan Motor Output kW 0.86 × 2 (Inverter driven)
Water Tank Capacity L Approx. 250
Refrigeant R410A
Charged Amount kg 6.7 × 2
External Dimentions H mm 2190
D mm 1340
W mm 2150
Unit Mass (dry weight) kg 1050 1065
Operating Noize Level (50/60Hz)※5 Hz 63 64
  1. Operating conditions: Chilled water temp: 20℃, Ambient temp: 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 operating at the highest capacity in the normal operating range.
  4. Continuous current load fluctuation within ±10%, and with stable ambient temp and power supply, etc. Does not include starting times or when the cooling load is too small, in which case the compressor may cycle on and off.
  5. Operating noise levels are from a position of 1m in front of the unit and at a height of 1m.
  6. Unit comes with a built-in multi-purpose overload and short circuit protection breaker.
  7. For liquid temperature setting of 0 to 3℃, use a 30 to 40% solution of industrial-use ethylene glycoal.
  8. At time of startup only. Will differ depending on ambient temperature.
  1. The recommended liquid (chilled water) than can be used is either clean water or a 30% to 40% ethylene glycol solution. Note that there will be a 10% reduction in cooling capacity if using a 30% to 40% ethylene glycol solution. Alternatively, if deionized water is to be used, it should have an electrical conductivity of at least 1µS/cm.
  2. Heat output from the product (in kW) is approx. 1.3 times that of the cooling capacity.