Frascold semi-hermetic screw compressors
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RTS/NR Frascold semi-hermetic screw compressors suitable for refrigeration

RTS SERIES New compressors characterized by innovative and compact design, suitable for commercial or industrial applications, either at medium or at low evaporating temperatures. Of up to 6 compressors the parallel compound is allowed. Outstanding performances and efficiency both with and without economizer. Particularly recommended whenever low noise units are required. Due to the multi-function automatic electronic control and to the exclusive oil management system, this series is also extremely reliable. All models can be driven by an external VFD in order to adjust the cooling capacity...

Compressor model Compressor model Compressor model MODELS RANGE High and medium temperature - Motor 1

FEATURES The compressors of RTS and NR series are meant for all refrigeration applications, both at medium and low evaporating temperatures, and also for the parallel compound in multi-compressor systems. The max cooling capacity reaches 375 kW and there are a good total of 32 models with a displacement range of 120÷538 m3/h at 50Hz. These compressors have been designed for long continuous working without structural failures and with reduced maintenance activities. Their efficiency is higher compared to the market standard and their use is particularly recommended for applications where low...

SUPPLY The standard delivery turns out to be one of the most complete and we found a wide range of options. Standard supply Capacity control, start uloader system. Suction shut-off valve, discharge shut-off valve with integrated check valve. Internal safety valve, electronic protection module, discarge temperature sensor. Oil injection kit (oil flow switch, oil filter, solenoid valve, oil sight glass). IP65 class electrical box, vibration dampers. Oil separator, different sizes available. Air-cooled oil cooler, different sizes available. Water-cooled oil cooler, different sizes available....

WORKING LIMITS R134a 80 Motor 1 Evaporating temperature (°C) Suction gas superheating 10K - without liquid subcooling For operating limits where additional oil cooler is required, refer the Frascold Selection Software. Economiser operation - the maximun condensing temperature could be limited

Evaporating temperature (°C) Suction gas superheating 10K - without liquid subcooling For operating limits where additional oil cooler is required, refer the Frascold Selection Software. Economiser operation - the maximun condensing temperature could be limited

RTSH models - High / medium temperature range - Motor 1 RTSH- Product specification Nominal capacity steps Nominal motor power Displacement (m3/h) Suction line Discharge line Starting current (A) Data reference: evaporating temperature -10°C; condensing temperature 45°C; Suction gas superheating 10K; without liquid subcooling. Standard motor: 400V / 3 / 50 Hz // 460V / 3 / 60 Hz. Motor connection: PWS o DOL. RTSL models - Low temperature range - Motor 2 RTSL- Product specification Nominal capacity steps Nominal motor power Displacement (m3/h) Suction line Discharge line Starting current (A)...

NRH models - High / medium temperature range - Motor 1 Product specification Nominal capacity steps Nominal motor power Displacement (m3/h) Suction line Discharge line Starting current (A) Max operating current Data reference: evaporating temperature -10°C; condensing temperature 45°C; Suction gas superheating 10K; without liquid subcooling. Standard motor: 400V / 3 / 50 Hz // 460V / 3 / 60 Hz. Motor connection: PWS o DOL. NRL models - Low temperature range - Motor 2 Product specification Nominal capacity steps Nominal motor power Displacement (m3/h) Suction line Discharge line Starting...

RTSH models - High / medium temperature range - Motor 3 RTSH- Product specification Nominal capacity steps Cooling capacity (kW - 50 Hz) Nominal motor power Displacement (m3/h) Suction line Discharge line Starting current (A) Max operating current Data reference: evaporating temperature -10°C; condensing temperature 45°C; Suction gas superheating 10K; without liquid subcooling. Standard motor: 400V / 3 / 50 Hz // 460V / 3 / 60 Hz. Motor connection: PWS o DOL.

NRH models - High / medium temperature range - Motor 3 Product specification Cooling capacity (kW - 50 Hz) Nominal capacity steps Nominal motor power Displacement (m3/h) Suction line Discharge line Starting current (A) Max operating current Data reference: evaporating temperature -10°C; condensing temperature 45°C; Suction gas superheating 10K; without liquid subcooling. Standard motor: 400V / 3 / 50 Hz // 460V / 3 / 60 Hz. Motor connection: PWS o DOL.

RTSH/L- 120 RTSH/L- 150 Dimensional drawing Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve (step 1)

RTSH/L- 186 RTSH/L- 210 Dimensional drawing DV Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve (step 1)

NRH/L- 240 NRH/L- 270 Dimensional drawing 4 Fixing positions Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve (step 1) Capacity control valve (step 2)

NRH/L- 300 Dimensional drawing DV NP Fixing positions Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve (step 1) Capacity control valve (step 2)

NRH/L- 360 Dimensional drawing DV NP Fixing positions Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve (step 2) Capacity control valve (step 1)

Discharge temperatire sensor High pressure connection (HP) Economiser/liquid injection connection Capacity control valve

OIL INJECTION CIRCUIT Circuit for NR_6 13 Circuit for all others models 11 Discharge line Sight glass Check valve Suction line Discharge pressure regulating valve Pressure equalization line Shut-off valve Solenoid valve