RKS J Compact Chiller With Water Tank (Air Cooled) Economy Model : Easy of Use + Simple + Affordable

RKS753J-V / RKS1503J-V

Cooling Capacity
10 - 40 ℃
Working Liquid
15 - 35 ℃
Control Accuracy
  • Compressor ON/OFF control offers temperature control of ±2℃ for superior versatility.
  • High Pressure Pump Built In
(Left) RKS753J-V (Right) RKS1503J-V
(Left) RKS753J-V (Right) RKS1503J-V

Simple and Reliably Designed Controller + Substantial Functionality

Easy operation with just the flick of a switch. Alarm details via error code display for quick recovery.


Output Signals

  • Operation Signal
  • Alarm Signal
  • Remote Signal

Operation Signal

  • Freeze-Prevention Mode
  • Warm Up Mode
  • Discharge Pump-Only-Operation
  • Automatic recovery After Power Outage etc.

Large diameter water supply port for easy tank cleaning.
Easy-to-Check LED-Lit Water Level Gauge

High Capacity

Φ100 mm large water supply port for easy cleaning!
The high capacity tank means less frequent water shortage warnings, less frequent water supplying, and less change in water temperature due to changing loads.
A built-in blue LED lit water indicator for easy confirmation of water level.

Wide mouth water supply port for easy tank cleaning.
Wide mouth water supply port for
easy tank cleaning.
Easy-to-Check LED-Lit Water Level Gauge
Easy to check
LED lit water level gauge.

Easy Filter Cleaning

Clogging Prevention Filter

Comes standard with a filter to help prevent clogging!
Easy tool-less removable filter design. Filter can be directly cleaned for easy removal of dirt and reduced manpower, adding to chiller operating stability.

Specifications(Standard Models)

RKS753J-V RKS1503J-V
Cooling Capacity (50/60 Hz)※1 kW 2.2/2.5 4.9/5.3
Ambient Temp. Range 10 - 40
Operating Temp. Range (Liquid Temp.) 15 - 35
Operating Water Pressure MPa 0.05 - 0.2 / 0.3
(50/60 Hz)
0.1 - 0.5
Control Precision※4 ±2.0
Min. Operating Circulation Rate
(50/60 Hz)
L/min 10
(Head: 20/30 m)
(Head: 50 m)
Power Source※2 V(Hz) Three-phase 200 (50/60) / 220(60)±10%
Power Consumption (50/60 Hz)※1 kW 0.9/1.1, 1.1 1.8/2.2, 2.2
Electric Current (50/60 Hz)※1 A 4.1/4.1, 4.1 6.8/7.4, 7.4
Power Capacity※3 kVA 2.0 4.2
Breaker Capacity※5 A 10 15
Operation Control Method Compressor ON/OFF Control
Compressor kW Fully Sealed Rotary Type
0.85 1.8
Condenser Corrugated Fin and Tube Parallel Flow
Evaporator Construction Plate Type Heat Exchanger
Material SUS316 (Brazing: Cu)
Discharge Pump Construction Cascade Type
Output kW 0.25 0.4
Water Tank Capacity L Approx. 17
Refrigerant R410A
Refrigerant kg 0.35 0.55
External Dimensions (HxDxW) mm 615×500×375 933×590×375
Product Mass (Dry weight) kg 45 67
Operating Noise Level (50/60 Hz)※6 dB 61/63 63/66
  1. Under the following conditions: Chilled water temp.: 20 ℃, Ambient temp: 25 ℃, Max discharge pump circulating load. Cooling capacity is at least 95% of listed figures. Heating capacity will change according to operating conditions.
  2. Source voltage phase unbalance should be less than ±3%.
  3. The figure noted is when the equipment is operating at the highest capacity of its nomal operating range.
  4. When the current load is continuously within ±10%, and the ambient temperature is stable. However does not include starting times or when the heat-load exceeds the chiller capacity.
  5. Comes standard with a built-in overload protection circuit breaker (NFB).
  6. Operating noise levels are from a position of 1 m in front of the product and at a height of 1 m.
  1. Liquid (chilled water) that can be used are either clean water and a 30 to 40% ethylene glycol solution. Note that there will be a drop in cooling capacity of 10% if using 30 to 40% ethylene glycol solution. Alternatively, if deionized water is to be used, it shoud have an electrical conductivity of at least 1µS/cm.
  2. Do not use aluminum parts for parts that will be wetted with the chilled water. Electrolytic corrosion of aluminum can cause clogging in the heat Exchanger.
  3. Heat output from the unit (in kW) is approx. 1.3 times that of its cooling capacity.
  4. Depending on the operating environment, condensation may form on piping inside the product, and temporary leakage of water from the pump mechanical seals may also occur, therefore a drain pan should be installed if required.