Manuali utente per Liebert 8 Tons

Sommario

• Model Number Nomenclature

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• 1.0 Product Features

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  • 1.1 Standard Product Features

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    • 1.1.1 Controls

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    • 1.1.2 Evaporator System Components

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      • DX Evaporator Section

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      • Chilled-Water Model

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    • 1.1.3 Condensing Unit Components

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      • Air-Cooled Condensing Unit (Indoor Centrifugal)

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      • Air-Cooled Condensing Unit (Outdoor Prop Fan)

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      • Water/Glycol Condensing Unit (Indoor)

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  • 1.2 Optional Equipment

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    • 1.2.1 Canister Humidifier

      10
    • 1.2.2 Electric Reheat

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    • 1.2.3 SCR Electric Reheat

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    • 1.2.4 Hot Gas Bypass (Condensing Units)

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    • 1.2.5 Free-Cooling Coil (GLYCOOL)

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    • 1.2.6 Smoke Detector

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    • 1.2.7 Firestat

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    • 1.2.8 Filter Clog

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  • 1.3 Ancillary (Ship Loose Accessories)

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    • 1.3.1 Single Point Power Kit

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    • 1.3.2 Refrigerant Line Sweat Adapter Kits

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    • 1.3.3 Return Air Filter Box with Duct Collar Kit

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    • 1.3.4 Condensate Pump Kit

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    • 1.3.5 Remote Monitoring and Control

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    • 1.3.6 Remote Sensors

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• 2.0 Site Preparation and Installation

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  • 2.1 Installation Considerations

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    • Table 1 Application limits, evaporator and chilled-water units*

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    • Table 2 Application limits, indoor and outdoor air-cooled condensing units

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    • Table 3 Application limits, indoor water/glycol-cooled condensing units

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    • 2.1.1 Room Preparation

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    • 2.1.2 Location Considerations

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      • Figure 1 System configurations-air cooled systems

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      • Figure 2 System Configurations-water/glycol systems

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      • Figure 3 System Configurations-chilled water systems

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  • 2.2 System Weights

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    • Table 4 Unit weights

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  • 2.3 Equipment Inspection upon receipt

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  • 2.4 Installing the Evaporator or Chilled-Water Units

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    • Figure 4 Threaded rod and hardware kit installation

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    • 2.4.1 Close Coupled Installations

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      • Figure 5 Close coupled installation

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    • 2.4.2 Evaporator Air Distribution

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      • Filter Box

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      • Connections for Ducted Systems

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        • Table 5 Evaporator external static pressure (60) at 3750 CFM (6371 CMH)

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    • 2.4.3 Piping Connections and Coolant Requirements

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      • Drain Line

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        • Figure 6 Drain installation

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      • Condensate Pump

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        • Figure 7 Condensate pump installation

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      • Humidifier Water Supply Line

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      • Chilled-Water Piping-Chilled-water Systems Only

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        • Figure 8 General arrangement diagram - chilled-water systems

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      • Refrigerant (R-22) Piping

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        • Table 6 Recommended refrigerant line sizes

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        • Figure 9 Refrigerant piping diagram

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      • Total refrigerant = Units and Lines

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        • Table 7 8-ton unit refrigerant charge

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        • Table 8 Line charges (field piping)*

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      • Quick Connect Fittings

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        • Table 9 Refrigerant quick connect sizes and torque

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        • Figure 10 Evaporator or chilled-water unit dimensional data

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    • 2.4.4 Electrical Connections, Evaporator or Chilled-Water Unit

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      • Power Connections

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      • Control Connections (10-wire on air-cooled, 8-wire on water/glycol cooled)

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        • Figure 11 Evaporator unit electrical connections

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  • 2.5 Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation

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    • 2.5.1 Location Considerations

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    • 2.5.2 Ducting

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      • General Considerations

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      • Considerations for Specific Applications

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    • 2.5.3 Piping Connections

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      • Figure 12 Piping connections - indoor air-cooled centrifugal fan condensing unit

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    • 2.5.4 Electrical Connections - Condensing Unit

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      • Power Connections

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      • Control Connections

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        • Figure 13 Indoor air-cooled centrifugal condensing unit dimensions and pipe connections

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        • Figure 14 Indoor air-cooled centrifugal condenser electrical connections

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  • 2.6 Outdoor Air-Cooled Condensing Unit Installation

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    • 2.6.1 Location Considerations

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    • 2.6.2 Piping Connections

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    • 2.6.3 Electrical Connections

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      • Power Connections

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      • Control Connections

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        • Figure 15 Electrical field connections - outdoor condensing unit

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        • Figure 16 Footprint dimensions - outdoor condensing unit

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        • Figure 17 Piping and electrical connections - outdoor condensing unit

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  • 2.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation

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    • 2.7.1 Location Considerations

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    • 2.7.2 Piping Connections

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      • Water/Glycol Piping Considerations

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      • Condensing Unit Fluid Requirements

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      • Regulating Valve

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    • 2.7.3 Electrical Connections

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      • Control Connections

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        • Figure 18 Indoor water/glycol condensing unit dimensional data

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        • Figure 19 Indoor water/glycol condensing unit electrical field connections

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        • Figure 20 System piping with indoor water/glycol-cooled condensing unit

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  • 2.8 Optional Equipment Piping

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    • 2.8.1 Free-Cooling Coil (GLYCOOL)

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      • Figure 21 Optional free cooling coil (3-way valve) on water/glycol units

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      • Figure 22 Optional free cooling coil (3-way valve) on air-cooled units

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  • 2.9 Checklist for Completed Installation

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• 3.0 Microprocessor Control

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  • 3.1 Feature Overview

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    • Figure 23 Wall box

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  • 3.2 Main Menu <Menu>

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  • 3.3 Setpoints

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    • Table 10 Default setpoints and allowable ranges

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  • 3.4 Status

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  • 3.5 Active Alarms

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  • 3.6 Alarm History

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  • 3.7 Time

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  • 3.8 Date

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  • 3.9 Setback

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    • Table 11 Night and weekend setback plan

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  • 3.10 Setup Operation

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    • 3.10.1 Restart Time Delay

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    • 3.10.2 C/F Degrees

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    • 3.10.3 Humidity Control Method

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    • 3.10.4 Lead Compressor

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    • 3.10.5 Show DIP Switch

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    • 3.10.6 Valve Time (For Systems With a Modulating Chilled-Water Valve)

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    • 3.10.7 CW Flush (For Systems With a Modulating Chilled-Water Valve)

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      • Table 12 Setup functions, default values and allowable ranges

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  • 3.11 Change Passwords

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  • 3.12 Calibrate Sensors

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  • 3.13 Alarm Enable

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  • 3.14 Alarm Time Delay

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    • Table 13 Alarm default time delays

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  • 3.15 Common Alarm Enable

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  • 3.16 Custom Alarms

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  • 3.17 Custom Text

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    • LCD Display Contrast

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    • Nonvolatile Memory

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    • Equipment Options Switches

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      • Table 14 Equipment switch settings (unit control board)

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      • Table 15 Switch settings (wallbox board)

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  • 3.18 Run Diagnostics

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    • Test Outputs

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    • Test Inputs

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    • Test Micro

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      • Figure 24 Control menu

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      • Figure 25 Control board (inside evaporator)

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      • Figure 26 Wall box board

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• 4.0 System Performance Microprocessor Controls

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  • 4.1 Control Type Response Proportional Control

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  • 4.2 Cooling

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    • 4.2.1 Multi-Step Cooling, Compressorized Direct Expansion (DX) Systems

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    • 4.2.2 Chilled-Water Cooling (8 Ton)

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    • 4.2.3 GLYCOOL Cooling (8 Ton)

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  • 4.3 Reheat

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    • 4.3.1 Electric Reheat - Staged

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    • 4.3.2 SCR Electric Reheat

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  • 4.4 Dehumidification / Humidification Percent Required

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    • 4.4.1 Staged Dehumidification, Compressorized Direct Expansion (DX) Systems

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    • 4.4.2 Humidification Operation

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      • System Activation

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    • 4.4.3 Dehumidification Lockout

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  • 4.5 Load Control Features

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  • 4.6 Communications

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• 5.0 Alarms

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  • 5.1 Alarms: Definitions and Troubleshooting

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    • 5.1.1 Custom Alarms

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    • 5.1.2 High Head Pressure

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      • Air-Cooled Systems

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      • Water/Glycol Systems

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    • 5.1.3 Humidity

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    • 5.1.4 Temperature

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    • 5.1.5 Humidifier Problem Alarm

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    • 5.1.6 High-Water Alarm

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    • 5.1.7 Loss of Power

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    • 5.1.8 Short Cycle

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  • 5.2 Optional/Custom Alarms

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    • 5.2.1 Change Filter

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    • 5.2.2 Firestat

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    • 5.2.3 Smoke Detector

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• 6.0 System Operation, Testing, and Maintenance

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  • 6.1 System Testing

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    • 6.1.1 Environmental Control Functions

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    • 6.1.2 Cooling

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    • 6.1.3 Heating

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    • 6.1.4 Humidification

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    • 6.1.5 Dehumidification

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    • 6.1.6 Remote Shutdown

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  • 6.2 Maintenance and Component Operation

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    • 6.2.1 Electric Panel

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    • 6.2.2 Filters

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    • 6.2.3 Blower System

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      • Air Distribution

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      • Blower Removal (Evaporator)

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    • 6.2.4 Electric Reheat

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    • 6.2.5 Refrigeration System

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      • Suction Pressure

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      • Discharge Pressure

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        • Table 16 Typical discharge pressures

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      • Thermostatic Expansion Valve

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      • Air-Cooled Condensing Units

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      • Coaxial Condensers (Water/Glycol-Cooled Condensing Units)

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      • Regulating Valves (Water/Glycol Condensing Units)

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      • Glycol Solution Maintenance

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      • Hot Gas Bypass (Optional)

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      • Replacement Procedures

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    • 6.2.6 Steam Generating Humidifier - Operation Procedures

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      • Replacing the Humidifier Canister

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    • 6.2.7 Circuit Board Adjustments

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      • Table 17 Humidifier control board DIP switch settings

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• 7.0 Maintenance Inspection Checklist

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  • FILTERS

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  • BLOWER SECTION

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  • REHEAT

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  • HUMIDIFIER

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  • REFRIGERATION CYCLE/SECTION

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  • ELECTRICAL PANEL

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  • COMMENTS _________________________________________________________________________

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  • _________________________________________________________________________

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  • COMPRESSOR

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  • CONTROLS

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  • AIR-COOLED CONDENSER/ DRYCOOLER

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  • WATER/GLYCOL CONDENSER

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  • GLYCOL PUMP

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• 8.0 Troubleshooting

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  • Table 18 Troubleshooting

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