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General| Refrigerant | R-134a |
|---|---|
| Capacity | 155 tons |
| Type | Air-Cooled |
| Compressor Type | Screw |
| Voltage | 460V/3Ph/60Hz |
Highlights potentially hazardous situations and safety recommendations for operation and servicing.
Lists recommendations to observe during maintenance and service visits to prevent hazards.
Comprehensive technical specifications for various RTAF models, efficiencies, noise levels, and refrigerants.
Information on materials in contact with evaporator water and importance of proper water treatment.
Details on evaporator water connections, flushing piping, air vents, and pressure gauges.
Components and layout for entering chilled water piping, including air vents and pressure gauges.
Components for leaving chilled water piping, including air vents, pressure gauges, and balancing valves.
Charts showing evaporator water pressure drop for standard tubes, sizes 090-245 and 250-550.
Options for freeze protection including water pump, heaters, glycol, and draining the water circuit.
Charts showing evaporator water pressure drop with turbulators for sizes 090-245 and 250-550.
Describes factory-installed heaters and their operation for freeze protection down to -20°C.
Explains using glycol solution for freeze protection and the importance of proper concentration.
Free cooling option data for RTAF 090-205 units with R134a, covering coil quantities and water flow.
Details on partial free cooling options, including coil quantities, water flow, and pressure drops.
Specifications for free cooling options without glycol, including pump and glycol content requirements.
Free cooling option data for RTAF units with R1234ze refrigerant, covering fan and system data.
Continued free cooling option data for RTAF units with R1234ze refrigerant, including system data.
Free cooling option data for RTAF 250-410 units with R134a, covering fan and system data.
Continued free cooling option data for RTAF 250-410 units with R134a, including system data.
Free cooling option data for RTAF units with R1234ze refrigerant, covering system data.
Continued free cooling option data for RTAF units with R1234ze refrigerant, including system data.
Describes the operation modes of integrated free-cooling based on outdoor and water temperatures.
Conditions required for enabling free cooling, based on outdoor air and water temperatures and hysteresis.
Requirements for sizing, selecting, and installing power supply wiring and fused-disconnect switches.
Description of the unit's refrigerant circuits, including compressors, service valves, and expansion valves.
Information on refrigerants used (R134a, R513A, R1234ze) and the importance of proper oil selection and handling.
Description of the rotary screw compressor, motor, oil separator, and associated systems.
Checklist to verify all recommended installation procedures are accomplished before unit startup.
Criteria for supply voltage, including measurement and allowable unbalance and fluctuation.
Explanation of voltage imbalance impact and calculation method for three-phase systems.
Importance of proper motor rotation and confirmation of electrical phase sequence before unit startup.
Step-by-step procedure for daily unit startup, assuming 2 circuits and no diagnostics.
Procedures for seasonal startup, including closing valves, servicing auxiliary equipment, and checking controls.
Procedure for restarting the unit after an extended shutdown period, including verifying services and adjusting flow.
Procedure for seasonal shutdown, including leak testing, draining, and periodic refrigerant pressure checks.
Procedures for refrigerant conservation and emission reduction, emphasizing recovery and recycling.
Importance of proper oil and refrigerant charge for unit operation, performance, and environmental protection.
Procedure for charging refrigerant (R134a, R513A, R134ze) into the unit, including temporary shutdown and restart.
Steps for replacing the refrigerant filter element, including indications of a dirty filter.
Procedure for field oil charging, including circumstances for its use and initial charging steps.
