Official Liebert DS Service Manual for Network Card Piping Schematics

Piping Schematics

9.0PIPING SCHEMATICS

Figure 57 Piping schematic—air-cooled, semi-hermetic compressor models

Relief Valve
Check Valve	Service
	Valve Liquid Return
		Head Pressure
Lee-Temp Receiver		Control Valve

Inverted trap on discharge and liquid lines to extend above base of coil by a minimum of 7-1/2” (190mm).

Fusible

Plug

Condenser Coil

(Fan Speed)

Condenser Coil

(Lee-Temp)

Hot Gas Discharge

Lee-Temp

			Liquid
		Cylinder	Sensing
	Service	Cylinder	Bulb
	Service	Unloader(s)	Bulb
	Valve		Suction
		Compressor	External
	Muffler		Service Equalizer
			Valve

* Traps every

Evaporator Coil25ft (7.6m) of rise

Field-installed relief valve (s) required for 50Hz EU CE units rated maximum 480 PSIG (33 Bar).

			* Isolation
** Muffler			valve

Expansion	Solenoid Sight Glass	Filter Dryer
Valve	Valve
	Valve

Refrigerant Piping

Field Piping

Service/Schrader (Access) Connection No Valve Core

Service/Schrader (Access) Connection With Valve Core

Hot Gas Discharge


Liquid Return						* Isolation
Liquid Return						* Isolation
						valve

*Components are not supplied by Liebert, but are recommended for proper circuit operation and

maintenance.

**Components supplied by Liebert and must be field-installed(70kW, 77kW and 105kW models only).

	Note: Schematic representation shown . Do not use for specific connection locations.	DPN000797
	Two refrigeration circuits provided . Single refrigeration circuit shown for clarity .
		Rev. 3

82

Image 92

Liebert DS user manual Piping Schematics, Piping schematic-air-cooled, semi-hermetic compressor models

Contents

Liebert DS Page Table of Contents Maintenance Electrical ConnectionsPiping 108 Hvac Maintenance Checklist Compressor Replacement Figures Page Page Tables Viii Important Safety Instructions Page Liebert DS Components and Nomenclature Downflow model component locations Upflow model component locations U a = Dual-Cooling Water/Glycol Three-stage Compressor Cooling Configurations Glycool Air Distribution-Downflow Units PRE-INSTALLATION GuidelinesRoom Preparation Upflow ducting configurations Air Distribution-Upflow Units Connections and System Setup Operating Conditions Liebert DS Dimensions and Weights Shipping dimensions-domestic and export, inches mmShipping weights-approximate, kg 028/035/042 053/070/077 Approximate Model No 028, 035 Front View Dry Weight, lb kg Approximate Model No 028, 035Top View Dry Weight lb. kg Approximate DPN00089451mm GLYCOOL/Dual-Cool Dry Weight, lb kg Approximate Model 053 070 077 Front View Dry Weight, lb kg Approximate Model No 070 077 Compressor Dry Weight, lb kg, Approximate Type Model 053 TOP View Front View Dry Weight, lb kg approximate Compressor Type ModelTop View Dry Weight, lb kg approximate Compressor Type Model 105 Dry Weight, lb kg Model No 028-042 Dry Weight, lb kg approximate Compressor Type Model Alternate Refrigerant Piping Entrance Model No 053, 070 Top View Model 105 Weights-upflow, air-cooled, 105kW 30 ton, allDry Weight, Approximate, lb kg Compressor GLYCOOL/Dual-Cool Dimensions, in. mm Model Height, in. mm Turning Vane Floor stand dimensions-downflow, 53-77kW 15-22 ton models Floor stand dimensions-downflow, 105kW 30 ton models Dimensions for upflow, 28-42kW 8-12 ton Models Blower Supply Blower outlet and deck dimensions-upflow, 53-77kW 15-22 ton Dimensions, in. mm Models Blower Supply Blower outlet and deck dimensions-upflow 105kW 30ton Dimensions, in. mm Models Blower Rear return filter box dimensions Dimensions, in mm Compressor Type # Filters Left Side Views Right Side Views Check One Packaging Material Equipment Inspection and Handling Unpacking the Unit Step 181659P1 Rev Removing the Unit from the Skid With a Forklift Step Moving the unit to its installation location Removing Piano Jacks Removing Liebert DS from Skid Using Rigging Rev Lifting Sling Equal Equal Distance Distance Semi-Hermetic Compressor Spring Isolation System Placing the Unit on a Floor StandDetail a Liebert Floor Stand front discharge shown Disassembling the Liebert DS for Transport Disassembly-Downflow UnitsRequired Equipment Reheat-Optional Component Remove the Compressor Assembly Remove the Filter and Electric Box Assembly Reassembly-Downflow Units Reconnecting Piping, Charging and Replacing Panels Reassembly Checklist Filter & Electric Box Assembly Filter & Electric Box Assembly 940mm 1930mm Assembly Assembled Height 1930mm 59-7/16 Semi-Hermetic Compressor Scroll Compressor Filter and Electric Box AssemblyBlower & Coil Assembly Dry Weight, lb kg Approximate Includes Panels Component Air Cooled Dual Cool Filter & Electric 1510mm Disassembly-Upflow Units Remove Compressor Assembly Remove Blower and Electric Box Assembly Reassembly-Upflow Unit 2159mm 31-1/4 794mm 85 2159mm Assembled Length 660mm 2083mm 108 2743mm Assembled Length 82 2083mm Blower & Electric Box Assembly 31-1/4 REV REV 31-1/4 794mm Electrical Connections Downflow LOW Volt Section Optional Electrical Connections Electrical Field Connection DescriptionsStandard Electrical Connections Optional Low Voltage Terminal Package Connections Condensate Piping-Field-Installed Fluid ConnectionsPiping Gravity Drain Condensate Pump Gravity drain for downflow and upflow units General Guidelines Requirements of Systems Using Water or GlycolHumidifier Supply Water-Optional Infrared Refrigeration Piping Leak Checking of Unit and Field Piping Piping Guidelines-Air-Cooled Units Recommended refrigerant line sizes OD copper inches Liquid Line, lb kg Fan Lee-Temp Model Speed Includes receiver Fan Speed Control Materials Supplied Fan Speed Control Leak Check and Evacuation ProcedureFan Speed Control Piping Fan speed suction pressure transducer settings Fan Speed Charging Lee-Temp Controlled Materials Supplied Lee-Temp Leak Check and Evacuation ProcedureLee-Temp Piping Lee-Temp Receiver Refrigerant Level Lee-Temp suction pressure transducer settingsLee-Temp Charging Piping Schematics Piping schematic-air-cooled, semi-hermetic compressor models Lee-Temp Fan Speed Customer Heat Rejection Liebert DS Unit Liebert Piping schematic-GLYCOOL semi-hermetic compressor models Associated piping Liebert Customer Heat Rejection Glycool with digital scroll compressor models Optional piping schematic for Econ-O-Coil DPN000805 Rev Connection Size / Opening Point Description Inches mm DPN000804 Front of Unit 53kW 15ton / 70 & 77kW 20 & 22ton DPN000929 Rev DPN000933 HUM E1 E2 Front of Unit DPN001015 CGD TOP View Left Side Section View Top View of UnitFront Section View Point Description In. mm Left Side Section View of Unit 53kW 15 ton/70 & 77kW 20 & 22 ton Left Side Section View 53kW 15 tons/70 & 77kW 20 & 22 ton Left Side Section View Front Section View Piping data-upflow, air-cooled 105kW 30 ton, all Point Description Connection Size / Opening Connection Size Point Description Inches mm Opening, inches mm Checklist for Completed Installation Moving and Placing EquipmentElectrical Other 108 109 Commissioning Procedure With Panels On Maintenance FiltersFilter quantities, downflow units Filter quantities, upflow units Blower Drive System Filter Replacement Procedure-Downflow UnitsFilter Replacement Procedure-Upflow Units Belt Removal Upflow Motor AccessBelt Installation and Tensioning Blower Bearing Maintenance Blower Bearing ReplacementBlower Bearing Inspection Blower Motor Correct orientation of float switch Humidifier Condensate Drain and Condensate Pump Systems Changing Humidifier LampsCondensate Drain Infrared Bulbs Compressor Air-Cooled Condenser and DrycoolersReheat-Electric Reheat Three-Stage and SCR Compressor Replacement Facility Fluid and Piping Maintenance Cleaning Instructions Adjustment-Johnson Controls/Penn Johnson ValvesParadenser-Water-Cooled Condenser Water/Glycol Control Valves Testing Function of Valve AdjustmentLocation 12.11.2Motor Ball Valve-Digital Scroll Compressors 12.11.3Drycooler Settings Aquastat settings-two-fan through four-fan drycoolersAquastat settings-six-fan drycoolers Aquastat settings-eight-fan drycoolers Hvac Maintenance Checklist Refrigeration Piping Water-Cooled CondensersCompressor Section Electrical Panel Air-Cooled Condenser / Drycooler Glycol PumpPage Ne t ItiTi n That