Quarterly service - water-cooled and air-cooled chiller systems
Estimated duration: 2 - 3 hours • Frequency: every 3 months
Equipment Details
| # | Service Action | Type | Done | Notes |
|---|---|---|---|---|
| Refrigerant System | ||||
| 1 | Check refrigerant charge (suction and discharge pressures) | CHECK | ☐ | |
| 2 | Inspect expansion valve operation (superheat reading) | INSPECT | ☐ | |
| Compressor | ||||
| 3 | Inspect compressor (running amps vs nameplate, vibration, oil level, oil sight glass) | INSPECT | ☐ | |
| 4 | Check compressor oil heater operation | CHECK | ☐ | |
| Condenser | ||||
| 5 | Clean condenser coils (air-cooled: compressed air / coil cleaner) or check condenser water quality (water-cooled: TDS, pH, biocide) | CLEAN | ☐ | |
| Evaporator | ||||
| 6 | Check evaporator approach temperature (leaving chilled water temp vs refrigerant temp) | CHECK | ☐ | |
| Safety Controls | ||||
| 7 | Test high-pressure safety cutout | TEST | ☐ | |
| 8 | Test low-pressure safety cutout | TEST | ☐ | |
| 9 | Test oil pressure safety (if fitted) | TEST | ☐ | |
| 10 | Test flow switch operation | TEST | ☐ | |
| Water Circuit | ||||
| 11 | Check chilled water flow rate and delta-T (supply vs return) | CHECK | ☐ | |
| Electrical | ||||
| 12 | Inspect electrical connections and tighten contactors | INSPECT | ☐ | |
| Operating Data | ||||
| 13 | Log operating data (suction pressure, discharge pressure, subcooling, superheat, amps, chilled water temps) | RECORD | ☐ | |
Fluid Specifications (General Guide)
| System | Type / Grade | Notes |
|---|---|---|
| Refrigerant | R-134a, R-410A, R-407C or as specified | Do not top up without leak test |
| Compressor oil | POE or mineral per manufacturer | Check sight glass level |
| Condenser water treatment | Biocide, anti-scale, corrosion inhibitor | Water-cooled systems only |
Specifications are general guidelines. Always refer to the chiller manufacturer's service manual for your specific make and model. Refrigerant handling requires an appropriate licence.
Parts / Consumables Required
| # | Part / Consumable | Part Number | Qty | Ready |
|---|---|---|---|---|
| 1 | Condenser coil cleaner (air-cooled) | As req. | ☐ | |
| 2 | Water treatment chemicals (water-cooled) | As req. | ☐ | |
| 3 | Replacement contactors (if pitted) | As req. | ☐ | |
| 4 | Rags, PPE, pressure gauges, thermometers | - | ☐ |
Notes / Defects Identified
Next Service Due
Technician
Facilities Manager