Liebert 205 251, 83, 104 165 Field Piping Installation, VFD and Fan Speed Control condenser piping

Page 31

Inspection and Installation

3.9.2Field Piping Installation

One discharge line and one liquid line must be field-installed for each circuit of the indoor unit and the outdoor condenser(s). Dual circuit condensers are available for most dual circuit indoor unit appli- cations. Refer to Figures 22, 23 and 24 below for additional field-installed piping needed at the con- denser. This piping is needed for proper system performance and for installation/interconnecting receivers and head pressure control valves for Lee-Temp systems.

NOTE

Keep the evaporator unit and condenser closed with their factory charge of dry nitrogen while all field piping is installed. Keep the field piping clean and dry during installation, and do not allow it to stand open to the atmosphere.

When all the field interconnecting piping is in place, vent the condenser’s dry nitrogen charge and connect to the field piping. Finally, vent the evaporator unit’s dry nitrogen charge and make its piping connections last.

Follow all proper brazing practices, including a dry nitrogen purge to maintain system cleanliness.

Figure 22 VFD and Fan Speed Control condenser piping

Entering Hot

Gas Line

Leaving

Liquid Line

Fasten liquid and hot gas lines to leg using flat surface clamps with isolators ( field-supplied).

Support field piping separately

to avoid coil damage and loss of charge.

Traps to Extend Above Base of

Coil by a Minimum of 7-1/2" (190mm)

Inverted Traps

(Field Supplied)

 

Metal

See

Clamp

Isolator

Detail

A-A

Detail A-A

 

DPN001065

 

Rev. 0

27

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Contents Liebert Air Cooled, Direct Drive Condensers Fan Speed Control 2-8 fan models only Three-phase voltage is only voltage available as standardExample DCDF165-Y On condensers with VFD Control, Lee-temp receivers,Table of Contents Operation System MaintenanceVariable Frequency Drive Product Description and FeaturesHead Pressure Control Types Fan SpeedSound Level Options Typical System ConfigurationsTransient Voltage Surge Suppression Option Lee-Temp Discharge Fan Speed and VFDSite Considerations Dimensions and Weights1067 mm See for typical condenser footprint dimensionsFour-Fan41-3/16 Condenser 1046mm Condenser footprint dimensions Operation and component accessSee for typical Typical condenser footprint-dimensions Piping connections for 6- and 8-fan Fan Speed Condensers Site Preparation Quiet-Line Models Condenser physical dataQuiet-Line Condenser Models Refrigerant Planning ValuesR-407C refrigerant required, approximate ReceiverPacking Material Equipment InspectionUnpacking the Unit Handling Unit on the SkidRemoving the Skid and Attaching Slings Step Attaching legs to a 6-fan or 8-fan unitAttaching sling to a 6-fan or 8-fan unit for moving Mounting the CondenserElectrical Supply Preparation Line Voltage Wiring50Hz condenser full load amp values 60Hz condenser dataLee-Temp receiver electrical data, 50Hz and 60Hz Low Voltage Control WiringLow Voltage Monitoring Wiring-TCDV Only Electrical ConnectionsDelta-Connected Power Supply Wye-Connected Power SupplyVFD Control Condensers Tcdv only Disconnect EMC Filter for Delta-Connected Power Electrical Field Connection Descriptions Electric service connection and fuse blockElectrical field connections for VFD control condensers Inspection and Installation Piping Guidelines Refrigeration Piping ConnectionsVFD and Fan Speed Control condenser piping Field Piping InstallationLee-Temp head pressure control condenser piping General arrangement-Air cooled models with Lee-Temp control Single Circuit ShownSystem Dehydration/Leak Test and Charging Procedures Other Moving and Placing EquipmentElectrical PipingStartup Startup ChecklistSystem Maintenance General ProceduresHow to Clean Special ProceduresCondenser Cleaning When to CleanFan Motors Maintenance Inspection ChecklistMonthly Semiannually Condenser Condenser Electrical Panel Condenser Electric PanelSymptom Possible Cause Check or Remedy TroubleshootingSystem Maintenance System Maintenance Page That Ne tIti Ti n