General System Overview
- Visual inspection of entire absorption chiller system for leaks, corrosion, or damage
- Record total operating hours and solution pump starts for maintenance tracking
- Verify all alarms (temperature, pressure, solution level) are functional and audible
- Check proper labeling and warning signs for chemical hazard identification
- Inspect insulation integrity on all vessels and piping
Control System & Display
- Daikin control panel display functional and showing clear readings
- No active alarms or crystallization warnings present
- Solution concentration readings within acceptable range
- Operating parameters within normal absorption cycle ranges
- Trending data logging functioning for cycle analysis
- Steam/hot water control valves responding properly
Absorber & Generator System
- Absorber solution level checked and within operational range
- Generator temperature and pressure within design specifications
- Solution pump operation smooth without cavitation or vibration
- Solution flow rates adequate for current load conditions
- No signs of solution crystallization or flow restrictions
- Heat exchanger approach temperatures within limits
Heat Source System
- Steam pressure and temperature within required parameters
- Steam trap functioning properly with no steam blow-through
- Hot water supply temperature and flow rate adequate
- Control valve modulation smooth and responsive
- Condensate return system operating without backpressure
- No leaks in steam/hot water piping or valves
Water Systems
- Chilled water flow and temperature differential within specifications
- Cooling water flow adequate with proper approach temperature
- Evaporator and absorber spray nozzles functioning properly
- Water treatment chemicals properly dosed and monitored
- Water pressure gauges accurate and within limits
- Strainers and filters clean with acceptable pressure drop
Vacuum & Purge System
- System vacuum levels within manufacturer specifications
- Purge unit operating cycles normal (not excessive)
- No visible air leaks at gaskets, seals, or connections
- Vacuum pump oil level and condition satisfactory
- Purge storage tank level monitored and recorded
- Vacuum relief devices inspected and functional
Safety & Protection Systems
- Crystallization protection system tested and operational
- High/low temperature and pressure limits functional
- Emergency dilution system ready and accessible
- Solution pump protection interlocks verified
- Emergency shutdown procedures posted and accessible
- Chemical safety equipment and eyewash stations checked
Performance Monitoring
- Coefficient of performance (COP) monitored and recorded
- Steam/hot water consumption within expected range
- Cooling capacity meeting building load requirements
- Solution concentration trends reviewed for stability
- Cycle times and temperatures logged for analysis
- Energy efficiency metrics compared to baseline
Documentation & Reporting
- Daily operational log completed with all parameters
- Solution analysis results documented and tracked
- Purge operation frequency and duration recorded
- Water treatment logs updated with test results
- Environmental compliance documentation current
- Maintenance activities and observations recorded