An indoor, high-efficiency water-cooled screw chiller with two independent R-134a refrigerant circuits, accessible semi-hermetic twin-screw compressors and automatic 20%–100% capacity modulation.
258.8 TR
151.2 kW
0.5842 kW/TR
0.4717 kW/TR
2
R-134a
2 twin-screw
20%–100%
141.08 m³/h
304.51 m³/h
5,535 kg
4,100 × 1,800 × 1,870 mm
2,900 rpm
273 A
5,020 kg
Technical specifications for the CRSW 2800 2 PE2 HE2 high-efficiency variant
Pre-start inspections · condition-based service planning · warning actions · fluids and maintenance records.
Use these checks before operation and record unresolved protective trips or abnormal conditions.
Confirm pump availability, valve position and that the controller accepts the flow permissive.
Act if: flow is not proven or a water-flow trip is active.
Confirm condenser-water pump and upstream heat-rejection system are available.
Act if: water supply or heat rejection is unavailable.
Inspect accessible joints, drains and insulation for leakage or damage.
Act if: leakage threatens circulation or electrical equipment.
Confirm the authorized chilled-fluid target and operating mode on the controller.
Act if: the target differs from the approved process setting.
Look for visible damage and fresh oil traces. Keep covers and guards in place.
Act if: damage or suspected leakage is present.
Check for leak indications using the approved site procedure.
Act if: a leak indication, discharge or unsafe room condition is present.
Review oil-system alarms and operating indications in the specified operating state.
Act if: an unresolved oil-system alarm remains; do not add unverified oil.
Read active alarms and recent faults; record the affected circuit before resetting.
Act if: an unresolved protective trip is present.
With covers closed, inspect for external damage, water ingress, unusual odor or heat damage.
Act if: burning smell, smoke or water ingress is evident.
Confirm flow, freeze, phase and pressure protections have not been bypassed.
Act if: a protective function is disabled, bridged or faulted.
Keep the chiller room accessible and maintain the designed ventilation.
Act if: a suspected refrigerant release makes access unsafe.
Service is driven by findings, operating history and the installed unit’s approved procedures. No universal oil-change, overhaul, descaling or filter-replacement interval is assigned here.
Abnormal noise, vibration or trips
Record circuit and load; check supply and operating conditions; arrange compressor diagnosis before internal work.
Oil alarm or carryover
Confirm the indication and fitted oil procedure before sampling, adding or replacing lubricant.
Low flow / poor cooling response
Check pumps, valves and restrictions; clean installed strainers only after isolation.
High-pressure trip / weak heat rejection
Check condenser-water supply and upstream heat rejection before investigating fouling.
Expansion-valve instability
Verify sensor feedback, operating conditions and the valve/control circuit through the service interface.
Implausible temperature / pressure readings
Check sensor identity, wiring and measurement before replacing a sensor.
Incoming cables & terminations
Investigate heating, discoloration, intermittent operation and repeated contactor faults along the complete supply path.
Starter / protective devices
Investigate starting sequence, interlocks, burnt contacts, overheating and recurring trips before parts replacement.
Preventive service programme
Monthly, quarterly and half-yearly visit options may be used; the installed unit’s service agreement determines the cycle and task list.
Running hours & starts
Retain compressor running hours and start count for component-service planning.
After maintenance
Restore guards and approved settings, confirm water circulation/interlocks, complete the authorized test run and record results.
STOP and CHECK indicate the suggested response level; always read the actual controller message and affected circuit.
Required circulation is not proven.
Action: Stop affected operation; check pump, valves and flow circuit.
The evaporator is being protected from a freezing condition.
Action: Restore approved flow, fluid and setpoint conditions; investigate cause.
Heat rejection or refrigerant-circuit operation is abnormal.
Action: Check condenser-water and upstream heat rejection before circuit diagnosis.
The refrigerant circuit is outside its permitted pressure condition.
Action: Record readings and diagnose the circuit; do not assume low charge.
A protected temperature condition has been reached.
Action: Stop and assess circuit conditions, sensing and compressor operation.
The electrical supply/protection indicates an incorrect phase condition.
Action: Qualified electrical personnel verify supply and protection before restart.
An electrical fault may be present.
Action: Isolate where safe and call the electrical service team.
Pressurized refrigerant may be escaping.
Action: Keep people clear and use the site emergency/ventilation procedure.
Restart is being limited or cycling is abnormal.
Action: Respect the delay and review demand, settings and fault history.
Flow, load, water quality, heat transfer or refrigerant control may have changed.
Action: Compare with commissioning records and diagnose before charging or cleaning.
Use the fitted unit’s identification and approved procedures. The guide does not assign generic charge quantities, lubricant grades or universal water-treatment chemistry.
R-134a
Use the exact unit/circuit nameplate charge and approved charging/recovery procedure.
Fitted-compressor approved product
Confirm compressor identification and oil specification before service; no generic grade or litres are assigned.
Commissioned fluid specification
Use the fluid approved for the actual process and evaporator operating range; do not add a generic glycol concentration.
Plant water-treatment specification
Evaluate fouling, corrosion or contamination findings with the water-treatment/service team.
Compatible approved method
Select for the fitted exchanger, tube material, seals and water circuit; no generic acid concentration or cleaning pressure is prescribed.
Machine identity
Full model suffix, serial, year, supply rating and compressor model/serial for each circuit.
Operating condition
Date/time, load, mode, setpoint, water temperatures, available pressures, current readings and active circuit.
Service history
Running hours/start count, alarms, findings, work performed, parts/products and test result.
Key specifications and operating details for the KEHEMS KRISCOOL CRSW 2800 2 PE2 HE2