MAINTENANCE OF SCREW CHILLER MAKE: YORK
Pharma Editor
November 21, 2016
Engineering
2,038 Views
- OBJECTIVE
- To lay down a procedure for the Maintenance of the Screw Chiller
- SCOPE
- This SOP is applicable to Screw Chillers.
- RESPONSIBILITY
- Technical Supervisor / Engineer
- ACCOUNTABILITY
- Sr.Executive / Manager
- PROCEDURE
- Daily Maintenance
- Check and ensure oil level as per the mark given on the view glass on oil separator.
- Check and ensure the Refrigerant level in the system within limits.(mark given on view glass)
- Check and ensure loading and unloading of chiller w.r.t. Set temperature of 41º F-46º F
- Check and ensure flow of oil in oil separator through view class.
- Check for any abnormal sound.
- Clean the total system externally with Cora cloth.
- Check and ensure all parameters given in logbook are with in limits.
- Check and ensure no oil leakage from Mechanical seal.
- Put a Tick mark (Ö) in Daily Check Sheet after completion of each activity. If it is not O.K put a cross (X) in Daily Check Sheet indicating the reason in remarks column.
- Immediately inform to the concern superior if it is not O.K (X) and take necessary corrective action as per the advice.
- Any such deviations should be maintained in the Machine History Cord along with necessary corrective action and its compliance there of.
- Weekly Maintenance
- Check for any refrigerant leaks in the total system with soap solution.
- Check for proper earthing of motor.
- Check for all solenoid valves operation.
- Check and ensure for all HP & LP cut outs & pressure /flow switches working condition..
- Put a Tick mark (Ö) in Weekly Check Sheet.
- Monthly Maintenance
- Check the function of oil heater by putting hand on side view glass of oil seperator.
- Check the oil in the thermo well if the level is reduced to minimum level.
- Clean the MPCC with dry cloth and tighten the all terminals.
- Check and ensure the stabilizer out put is 24 volts D.C
- Clean the control panel with air blower
- Put a Tick mark (Ö) in Monthly Check Sheet and repeat the steps as per 5.1.9, 5.1.10 & 5.1.11.
- Quarterly Maintenance
- Tighten the motor base bolts.
- Check the operation condition of all interlocks.
- Check and ensure vibration & noise level of the system with in limits.
- Put a Tick mark (Ö) in Quarterly Check Sheet.
- Half Yearly Maintenance
- Regrease the motor bearings.
- Conduct a chemical analysis for oil.
- Change the duplex filter element, if cooler pressure drop is more than 30% of the oil pressure.
- Change the filter dryer in oil return system.
- Put a Tick mark (Ö) in Half Yearly Check Sheet.
- Yearly Maintenance
- Conduct the megger test on motor.
- Conduct the pressure test to the system.
- Check the programme of microprocessor and operation of all relevant control inputs &outputs.
- Conduct the evacuation & dehydration.
- Change the oil in the circuit with new oil, if necessary.
- Calibrate the Temperature and pressure gauge.
- Put a Tick mark (Ö) in Yearly Check Sheet.
- Forms and Records (Annexures)
- Not Applicable
- Distribution
- Master copy – Quality Assurance
- Controlled copies- Quality Assurance, Production, Quality Control
- History
| Date |
Revision Number |
Reason for Revision
|
| – |
00 |
New SOP
|
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