Top Ten Proper Chiller Maintenance Tips

Process cooling equipment (chillers) can last many years, depending on the how well the equipment is maintained. Here are some suggestions how to do proper chiller maintenance to keep your production running. In addition to these tips, please consult your manual. If you need service for your chiller, please contact us for a certified service contractor in your area or our Parts Department for original replacement parts. It is a good idea to have spare parts on hand to reduce downtime if your chiller needs servicing.

1. Inspect and clean condenser
   • Remove buildup of dirt, oil and other debris
   • Inspect condenser fins – use compressed air >30PSI in opposite direction of air flow
2. Clean air filters, blow and/or wash out
3. Check water quality/glycol mixture
4. Inspect fluid filters/strainers
5. Inspect fluid system for
   • Fluid leaks
   • Loose pipe fittings or hoses
   • Plumbing parts for wearing, cracking or chafing
6. Check voltage and amp draw
   • Readings should be within +/- 10% of the nameplate
   • Maximum difference of +/- 2% between each phase
7. Inspect mechanical components
   • Look for signs of wear or over-heating, discolored paint/metal could be a sign of a motor under excessive load and over-drawing current
   • Listen for metallic sounds or other excessive noise
   • Fill all components with lubrication fittings
8. Check all wiring
   • Make sure Disconnect is OFF
   • Replace damaged to reduce shorting or unintentional grounds
9. Inspect/test refrigeration system
   • Check the inside of the chiller for evidence of refrigeration leaks
   • Spots of oil inside of the chiller or refrigeration lines covered in oil could indicate a possible leak
   • Contact DTS for certified refrigeration technician
10. Pump Seals
    • Note: All pump seals are designed to have some leakage to promote long seal life. A small amount of leakage is considered normal.
    • With water or water/glycol, most of the leaking fluid evaporates before ever dripping below the pump. Glycol staining or a drop or two below the pump is considered normal.
    • With oil, expect some evidence of oil – oil cannot evaporate.