Trane TRG-TRC011-EN manual Maintenance Considerations, Period four

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period four

Maintenance Considerations

notes

period four

Figure 54

Today, after an absorption chiller is installed and put into operation, it functions without a full-time attendant. In most cases, the chiller starts and stops on a schedule controlled by a building automation system or a simple time clock.

Water chillers are designed for maximum reliability with a minimum amount of maintenance. Like all large mechanical systems, however, certain routine maintenance procedures are recommended. Periodic inspection of the purge system, cooling tower, fluid levels, heat transfer surfaces, energy supply, and pumps helps to maintain the absorption water chiller in peak operating condition. This period discusses these general maintenance requirements of absorption water chillers.

▲Chilled water inlet and outlet temperatures and pressures

▲Cooling water inlet and outlet temperatures and pressures

▲Absorber inlet and outlet solution temperatures and concentrations

▲Absorber spray solution temperature

▲Generator inlet and outlet solution temperatures

▲Evaporator refrigerant temperature

▲Condenser refrigerant temperature

▲Crystallization margin

▲Purge pump-out activity

▲Gas supply pressure (direct- fired)

Figure 55

Chiller operation should be checked daily and recorded in an operating log. Standard operating logs include: solution data; evaporator, absorber, and

46	TRG-TRC011-EN

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Contents Air Conditioning Clinic Absorption Water Chillers Absorption Water Chillers Preface Contents TRG-TRC004-EN Introduction TRG-TRC011-EN Period one Absorption Refrigeration CyclePeriod one Reject heat Heat energy Absorption System Fluids High affinity for water refrigerant Components of the Absorption Cycle Conditions Steam or Hot waterrefrigerant vapor Generator Condenser Refrigerant then flows into the evaporator pan Absorber spray pump Solution Heat Exchanger Dilute Generator pump Equilibrium Chart Heat Solution temperature Period two Absorption Chiller TypesSingle-Effect Chiller Absorber Evaporator spray pump Spray pump Generator pump Double-Effect Chiller Vapor Low Temperature condenser Cooling Generator Water Evaporator Absorber Low-temperature generator pump Generator pump Absorption Chiller Types Direct-Fired Chiller Evaporator High-temperature high-temperature Generatorgenerator pump Chiller/Heater Absorption Chiller Types Changeover Absorption Chiller Types Period three Capacity ControlPeriod three Energy valve Generator Crystallization 10C 37.8C Capacity Control Capacity Control Capacity Control Heat exchanger bypass Evaporator pan Purge System Isolation valve Period four Maintenance ConsiderationsPeriod four Maintenance Considerations Test run with alternate fuel, if dual-fuel burner Maintenance Considerations Maintenance Considerations Corrosion inhibitor and performance additive recommendations Period five Application ConsiderationsCooling-Water Temperature Limitations Combination Chiller Plants 58F Special Considerations for Direct-Fired Chillers Application Considerations Equipment Rating Standards Period six ReviewPeriod six Review Review Review Questions for Period QuizQuiz TRG-TRC011-EN Answers Glossary Glossary Glossary Trane Company