Table of Contents
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Table of Contents
Related Manuals for Unicla 170 Series
Summarization of Contents
Compressor Fitting Information
Removing Transit Gas
Procedure to remove transit gas from a new Unicla UWX compressor before mounting.
Initial Lubrication
Rotating the compressor armature to ensure proper lubrication before initial start-up.
Service Manual Consultation
Consulting the specific Unicla compressor service manual for disassembly procedures.
System Cleanliness
Contamination Prevention
Ensuring the system is free of solid particle and chemical contamination before compressor fitting.
Flushing Procedures
Flushing contaminated systems before fitting new compressors; individual component flushing is recommended.
Compressor Mounting Guidelines
Mounting Points
Guidelines for mounting compressors securely to the engine bracket using manufacturers' specifications.
Mounting Angle Specifications
Specifies the allowed mounting angle for each compressor model.
Lug Type Mounting
Ensuring no gap between bracket and lug for Unicla UP series compressors.
Belt Alignment and Tension
Belt Alignment
Ensuring perfect alignment of the compressor clutch pulley with drive and auxiliary pulleys.
Belt Tension Adjustment
Adjusting belt tension to be taut but not excessive, with recommended deflection and checks.
Compressor Speed Limits and Rotation
Speed Limit Compliance
Ensuring compressor speed does not exceed specified continuous and momentary limits.
Pulley Ratio Considerations
Consideration for fitment of a cut-off sensor for over-speed if excessive pulley ratios are unavoidable.
Compressor Rotation Matching
Matching compressor direction of rotation to the application to prevent premature clutch failure.
Unicla Compressor Oil Selection
Recommended Oil and Refrigerant
Details on selecting the correct oil and refrigerant for common applications.
Oil Quantity Calculation
Calculating and maintaining the correct amount of oil in the compressor and system.
Matching Oil Types
Ensuring added oil is identical to the native oil installed on the compressor label.
Oil Separator Recommendations
Recommendation for oil separators in multiple evaporator systems or low-speed operations.
Compressor Selection Criteria
Basic Selection Guidelines
Basic guidelines for selecting compressors based on speed, refrigerating capacity, and refrigerant.
Hose and Pipe Selection
Suction Line Sizing
Importance of correct suction line sizing for adequate refrigerant flow and avoiding capacity compromise.
Discharge Line Sizing
Calculating discharge line pipe or hose sizes based on suction line sizes.
Recommended Suction Line Pipe Size
Suction Line Pipe Size Recommendations
Charts providing suction pipe size recommendations for Unicla compressors by model and length.
System Validation and Performance
Discharge Pressure Analysis
Guide for analysing normally acceptable high side pressures for given ambient conditions.
Thermal Loading Assessment
Understanding excessive thermal loading and its impact on compressor operation and performance.
Other Performance Considerations
Restricted TX Valves/Orifice Tubes
Effect of restricted TX valves or orifice tubes on compressor performance under varying heat loads.
Poor Condensing Impact
Consequences of poor condensing on vapour feed and evaporator superheating.
Undersized Suction Line Effects
Impact of undersized suction lines on refrigerant flow and compressor cooling.
Contaminated Refrigerant Issues
How contaminated refrigerants can affect compressor cooling, especially with non-condensables.
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