RKS753J-V-00000/ RKS1503J-V-00000


Cooling capacity


1.1 kW (RKS753J-V-00000)

2.4 kW (RKS1503J-V-00000)

Operating Ambient Temp. Range



Operating Liquid Temp. Range



Control Precision




Made even easier to use!
Common for all RKS J series models


1.  Simple, stable design with a controller

2.  Easier tank cleaning with large water supply port

3.  Water level shown clearly through LED water leveller

4.  Anti-clog filter is installed in the condenser as a standard feature






Many functional specifications available to match your application

The list of accessories is available on a different page. Please click the link below to take a look.

> Optional accessories of all RKS J(M) series model


Model RKS753J-V-00000 RKS1503J-V-00000
Performance Compressor output (50Hz) HP 1.1 2.4
Cooling capacity (50Hz)*1 KW 1.8 4.1
TR 0.5 1.2
BTU/h 6,100 13,900
Ambient Temp. Range 10~40
Operating temperature range (Liquid temperature) 15~35
Operating Water Pressure Mpa 0.05~0.2/0.3(50/60Hz) 0.1~0.5
Control accuracy*4 ±2.0
Min. Operating circulation rate (50/60Hz) L/min 10 (Head 20/30m) 12/21 (Head 50m)
Power specification Power source*2 V(Hz) Three-phase 200±10%(50/60)・220±10%(60)
Power consumption (50/60Hz)*1 kW 0.9/1.1, 1.1 1.8/2.2, 2.2
Electric current (50/60Hz)*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
Equipment detail Refrigerating compressor Structure   Fully sealed rotary type
Output kW 0.85 1.8
Condenser   Corrugated fin & Parallel flow tube type
Heat exchanger Structure   Plate type heat exchanger
Material   SUS316 (Brazing: Cu)
Discharge pump Structure   Cascade type
Output kW 0.25 0.4
Water tank capacity L/min Approx. 17
Refrigerant   R-410A
External dimensions (Height x Length x Width) mm 615×500×375 933×590×375
Product mass (Dry weight) kg 45 67
Operation noise level (50/60Hz)*6 dB 61/63 63/66


*1 Under the following conditions: Chilled water temp.: 20 °C, Ambient temp.: 32 °C, 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 normal 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.  
Note 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 a 30 to 40 % ethylene glycol solution. Alternatively, if deionized water is to be used, it should have an electrical
conductivity of at least 1 μs/cm.
Note 2) Heat output from the unit (in kW) is approx. 1.3 times that of the cooling capacity.  
Note 3) 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.

External Dimensions

Cooling Capacity

Pump characteristic curves