Liebert ITR Water and Glycol-Cooled Condensing Units, Piping Considerations, Glycol Systems

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Split System Models

7.6Water and Glycol-Cooled Condensing Units

For installation guidelines, refer to Installing the Indoor Condensing Unit on page 48.

7.6.1Piping Considerations

It is recommended that manual service shut-off valves be installed at the supply and return line to each unit. This will provide for routine service or emergency isolation of the unit.

When the water source for the condenser is of poor quality, it is good practice to provide cleanable fil- ters in the supply line. These filters will trap the particles in the water supply and extend the service life of the water-cooled condenser.

Table 30 Water and glycol-cooled unit connection sizes

Connection	Size and Type

Condenser Water Inlet	1-1/8" OD Cu

Condenser Water Outlet	1-1/8" OD Cu

Suction Line	1-7/16" - 16 male #12 quick connect

Liquid Line	1-1/16" - 12 male #10 quick connect

Table 31 Water and glycol-cooled condensing unit data

		Net Weight		Glycol Volume
	Model
	Model	lb	kg	gal	liters

	MC_69W	282	128	2.0	7.6
	MC_68W	282	128	2.0	7.6
	MC_68W

7.6.2Condenser Water Requirements

The standard maximum water pressure is 150 psig (1034 kPa). For applications above this pressure, consult the factory about high pressure systems.

The system will operate in conjunction with a cooling tower, city water, or drycooler.

7.6.3Regulating Valve Adjustment and Testing

Refer to 4.3.1 - Water Regulating Valve Adjustment and 4.3.3 - Testing Valve Function.

7.6.4Glycol Systems

For split system glycol systems, use drycooler and pump data found in 5.0 - Glycol/GLYCOOL- Cooled Models. See Table 16 - Drycooler data.

Electrical control interconnect to drycooler is wired from water/glycol condensing unit.

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Contents

Liebert Challenger ITR Page Table of Contents R407C Refrigerant Chilled Water ModelsSplit System Models Figures Tables System Descriptions Location Considerations Remote Sensor Installation LocationRoom Preparation Equipment InspectionDomestic Export Model Lb kg 50Hz Models 60Hz Models Unit shipping weightsHandling With Skid Removal of SkidUnit Weight Cabinet dimensionsSL-11897 Piping connection size Piping ConsiderationsDrain Line Piping Outlet Locations Piping connections for split system fan coil units Piping connections for water/glycol and Glycool units Piping connections for chilled water self-contained units Electrical connections Electrical ConnectionsDucted Applications Plenum InstallationBalancing the Air Distribution Checklist for Completed Installation Lee-Temp/Flood Back Head Pressure Control Condensers Condenser LocationLine Voltage Low VoltageAir-cooled condenser statistics Equivalent Length Hot Gas Line Liquid Line Refrigerant PipingRecommended line sizes OD copper inches 23 & 33 kW 067A 065ACondenser refrigerant per serial tag Fan Speed Control SystemsMaterials Supplied Equivalent lengths feet for various pipe fittingsDehydration/Leak Test Single Circuit Shown Piping Refrigerant control settings psi kPaLee-Temp/Flood Back Head Pressure Control Systems ChargingMaterials Supplied Low Pressure Cut Out High Pressure Cut Out 360 Single Circuit Shown Condenser Water-cooled general arrangement Water Regulating Valve Manual Flushing Water Regulating Valve AdjustmentTesting Valve Function Water Regulating ValvePump and Drycooler Drycooler InstallationDrycooler Location Dry Bulb Wet Bulb Relative Dew Point Humidity Room dew point temperaturesGlycol Piping Expansion Tanks, Fluid Relief Valves and Other DevicesPreparing the System for Filling Indoor unit glycol volume approximate gallons liters maxVolume in standard Type L copper piping Filling Instructions@ 50F 10C Glycol SolutionsEthylene glycol concentrations Filling the System 483mm 43-3/16 1097mm For expansion tank dimensions, see on43-9/16 110 5mm See Note 30-1/4Pump Pump Suction Pump Discharge Connection Mounting hole dimensional dataDrycooler data Glycol pump dataGlycol general arrangement Glycool general arrangement Glycol Regulating Valve Glycol Regulating Valve AdjustmentChilled Water Models Water/Glycol-Cooled Condensing Units Air-Cooled Condensing UnitsRefrigerant Loop Line coupling sizes Unit refrigerant chargeRecommended refrigerant lines R22 or R407C sizes OD copper Evaporator Condensing Unit EvaporatorQuick Connect Fittings Outdoor Air-Cooled Condensing Units Unit Dimensions See TablePFH067A-L See Table Outdoor air-cooled condensing unit-top air discharge models152 Piping and electrical connections top air discharge36-1/4 38-1/2 SL-11081 PG 8A Electrical field connections, prop fan condensing moduleIndoor centrifugal condensing unit Installing the Indoor Condensing UnitModel Net Weight 60 Hz 50 Hz Lb kg MC65A MC64A Centrifugal Air-Cooled Condensing Units Airflow CFM CMH DuctingCentrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Condenser Water Requirements Regulating Valve Adjustment and TestingWater and Glycol-Cooled Condensing Units Piping ConsiderationsWater/glycol-cooled condensing unit dimensions WATER/GLYCOL R407C Refrigerant Temperature Gauge Pressure Psig KPaExample Temperature Pressure Gauge Psig KPaCalculating Subcooling That Ne tIti Ti n