Liebert ITR installation manual Evaporator Condensing Unit

Page 47

Split System Models

Table 23 Equivalent lengths (feet) for various pipe fittings

Copper Pipe

90 Degree

90 Degree

45 Degree

 

Gate

Globe

Angle

OD in.

Elbow Copper

Elbow Cast

Elbow

Tee

Valve

Valve

Valve

 

 

 

 

 

 

 

 

1/2

0.8

1.3

0.4

2.5

0.26

7.0

4.0

 

 

 

 

 

 

 

 

5/8

0.9

1.4

0.5

2.5

0.28

9.5

5.0

 

 

 

 

 

 

 

 

3/4

1.0

1.5

0.6

2.5

0.3

12.0

6.5

 

 

 

 

 

 

 

 

7/8

1.45

1.8

0.8

3.6

0.36

17.2

9.5

 

 

 

 

 

 

 

 

1-1/8

1.85

2.2

1.0

4.6

0.48

22.5

12.0

 

 

 

 

 

 

 

 

1-3/8

2.4

2.9

1.3

6.4

0.65

32.0

16.0

 

 

 

 

 

 

 

 

1-5/8

2.9

3.5

1.6

7.2

0.72

36.0

19.5

 

 

 

 

 

 

 

 

Refrigerant trap = 4 times equivalent length of pipe per this table

Figure 19 Refrigerant piping diagram

Evaporator

Suction Line Piping Condensing unit below evaporator

Pitch down 1/2" (13mm) per 10 ft. (3m)

NOTE

When remote condensing units are installed below the evaporator, the suction gas line should be trapped with an inverted trap to the height of the evaporator. This prevents refrigerant migration to the compressors during off cycles. Maximum recommended vertical drop to condensing unit is15 ft. (4.6m).

Evaporator

Condensing

Unit

Condensing

Unit

Suction Line Piping

Condensing unit above evaporator .

Traps recommended at the base of riser and every 25 feet (7.6m) of vertical rise.

41

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Page 46 Page 48
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 Adjustment Chilled 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 UnitsAirflow 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
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