R717 Ammonia

RWBIIROTARY SCREW

COMPRESSOR UNITS

MODELS 60 - 399

Refrigerant R717(Ammonia)

CompressorThe Frick manufactured RWB II compressor has been designed utilizing the latest technology to offer the most reliable and energy efficient unit currently available. All screw compressor casings are designed and tested in accordance with the requirements of common standard for 24 barg maximum discharge pressure. Rotors for models 60-270 are manufactured from bar stock. Rotors for models 316-399 are manufactured from forged steel. Both use the latest asymmetric profiles. The compressor incorporates a complete antifriction bearing design for reduced power consumption and the bearings selected provide an L10 life in excess of 100,000 hours at design conditions.

Capacity ControlCapacity control is achieved by use of a slide valve which provides fully modulating capacity control from 100% to approximately 10% of full load.

"Volumizer®" Variable Volume Ratio ControlThe RWB II compressor includes a patented method of varying the internal volume ratio to match the system pressure ratio, eliminating the power penalty associated with over- or undercompression.

Lubrication SystemThe RWB II compressor is designed specifically for operation without an oil pump under normal operating conditions. All oil required for main oil injection and lubrication is provided by positive gas differential pressure. All oil passes through a 15 micron filter furnished with isolation stop valves and drain connections for ease of servicing. Booster and some low pressure differential, high-stage applications will require the demand oil pump option.

Oil Separator/ReservoirThe oil separator is a horizontal, three-stage design with integral sump. The separator is designed and constructed in accordance with PED for a maximum design working pressure of 20.4 barg (24 barg in option). Replaceable coalescent separator elements are provided for final gas/oil separation of particles down to less than 1 micron.

Oil CoolingCooling the compressor oil may be achieved by either liquid-refrigerant-injection oil cooling, water-cooled oil cooling, or thermosyphon oil cooling. Water-cooled and thermosyphon oil-cooled systems are supplied with shell and tubes type heat exchangers mounted on the unit.

Quantum Control CenterThe Quantum control panel is factory mounted, IP54 CE listed, and completely piped and wired with all the required safety and operating devices. A built-in telecommunications interface suitable for connection to a remote computer or control device is included. A 10.4 « Active Color VGA Graphics Display offers a high contrast, crisp clear display of compressor information and status. Additional I/O can be easily installed in the field. This feature provides flexibility for future engine room upgrades and changes. Two field-selectable serial communication ports allow you to choose from a combination of RS- 422, RS-485, or RS-232 port configurations for both interpanel and external communications. Included in the microprocessor is time-proportioning capacity control, firstout annunciation, prealarms, volumizer control, real-time clock control, access code protection, lead-lag sequencing, alternate suction pressure operation, trending, and more. The operating conditions at the time of the compressor’s last ten alarms or shutdowns are stored in memory, providing the ultimate in service and troubleshooting convenience.

ValvesThe unit has a combination suction shutoff and check valve with strainer multivalve. The unit’s discharge has a mounted combination check and shutoff valve

Designed for all refrigeration applications.

RWB II Rotary Screw Compressor Units are engineered and manufactured to meet the exacting requirements of the Industrial Refrigeration Market. All components have been designed and arranged to assure reliability, accessibility, and servicing convenience. Standard units are designed for booster or high-stage duty with ammonia, halocarbon, or hydrocarbon refrigerants and are shipped completely assembled.

Technical Data

RWBII ModelCompressor Displacement

@ 2950 RPMm3/h

Ratings Ammonia (R717) *Cooling Capacity

kWShaft Power

kW60 445 363 9176 560 456 115

100 751 613 147134 1001 817 197177 1355 1103 254222 1706 1384 320270 2108 1715 395316 2455 1992 460399 3091 2495 580

* Based on -6.7°C suction and 35°C condensing with 5.5°C liquid subcooling and 5.5°C suction superheat Ratings with water cooled oil cooling

Overall Dimensions and Weights

C

BA

ModelDimensions (mm) Max. Operating Weight (kg)A B C

Liquid injection Oil cooler Liquid injection Oil cooler60…RWB…05 3490 1210 1430 1985 2670 326076…RWB…05 3490 1210 1430 1955 2780 3360

100…RWB…05 3555 1210 1480 2130 3210 3790134…RWB…05 3795 1245 1480 2230 3920 4500100…RWB…06 3680 1235 1550 2095 3700 4280134…RWB…06 3875 1270 1550 2195 4030 4610177…RWB…06 3950 1320 1550 2300 4870 5450222…RWB…06 4245 1425 1550 2430 5200 5780177…RWB…07 4255 1350 1650 2355 5370 5960222…RWB…07 4550 1455 1650 2485 5710 6290270…RWB…07 4700 1550 1687 2685 7330 7995316…RWB…07 4960 1550 1687 2885 7810 8475399…RWB…07 5060 1550 1687 2885 8920 9585316…RWB…09 5510 1765 1851 3255 9350 10020399…RWB…09 5610 1765 1851 3255 9710 10375399…RWB…10 5795 1695 1701 3355 10320 10980

RWBII FORM RWB.01 SLE 08.04Subject to change without notice.