Emerson Figure i manual Installation of Piping to Units, Piping connection sizes and torque

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Installation

2.5.4Installation of Piping to Units

NOTE

When using hard piping, complete all piping and evacuate the lines before connecting quick-connects.

NOTE

Liebert Challenger 5-ton evaporator includes a nitrogen holding charge only. This holding charge must be evacuated and unit placed in a 250 micron vacuum prior to connecting piping. See Table 12 for field charge required.

Use caution when connecting the quick-connect fittings. Read through the following steps before mak- ing the connections.

1.Remove protector caps and plugs.

2.Carefully wipe coupling seats and threaded surfaces with a clean cloth.

3.Lubricate the male diaphragm and synthetic rubber seal with refrigeration grade oil.

4.Thread the coupling halves together by hand to ensure that the threads mate properly.

5.Tighten the coupling body hex nut and union nut with the proper sized wrench until the coupling bodies bottom out or until you feel a definite resistance.

6.Using a marker or pen, make a line lengthwise from the coupling union nut to the bulkhead.

7.Tighten the nuts an additional quarter turn; the misalignment of the lines shows how much the coupling has been tightened. This final quarter turn is necessary to ensure that the joint will not leak. Refer to Table 10 for torque requirements.

8.Add liquid refrigerant charge for any field-fabricated piping (refer to Table 11) and the 5-ton Liebert Challenger evaporator if used (refer to Table 12).

Table 10 Piping connection sizes and torque

Line Size OD Cu

Coupling Size

Torque, lb-ft. (N-m)

 

 

 

1/4 or 3/8

#6

10-12 (145-175)

 

 

 

5/8 thru 7/8

#10 or #11

35-45 (510-655)

 

 

 

1-1/8

#12

50-65 (730-950)

 

 

 

Table 11 Line charges - refrigerant per 100 ft. (30m) of Type L copper tube

Line Size,

R-407C, lb/100 ft. (kg/30m)

 

 

 

O.D., in.

Liquid Line

Suction Line

 

 

 

 

3/8

3.7

(1.7)

—

 

 

 

 

1/2

6.9

(3.1)

—

 

 

 

5/8

11.0 (5.0

0.4 (0.2)

 

 

 

3/4

15.7 (7.1)

0.6 (0.3)

 

 

 

 

7/8

23.0

(10.4)

1.0 (0.4)

 

 

 

1-1/8

—

1.7 (0.7)

 

 

 

1-3/8

—

2.7 (1.1)

 

 

 

 

2.5.5R-407C PFH Installed as a Replacement Condensing Unit in an R-22 System

When replacing the condensing unit of an existing Liebert split system containing R-22 and mineral oil, the following should be considered.

1.Check for proper operation of the system prior to replacing the outdoor unit. If this is not possible, at minimum perform a leak check to ensure that the components that remain (line set, evaporator) are leak tight.

2.Check for acid or contaminants in the mineral oil.

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Contents Liebert Prop Fan Condensing Unit Example PFH037A-PL7 = 380/415-3ph-50HzTable of Contents Figures Prop Fan Condensing Units Optional EquipmentEquipment Inspection Location ConsiderationsModel Numbers Dimensional Data, in. mm Lb. kg 60Hz 50Hz Dimensional DataNet Weight Cabinet and floor planning data, horizontal air dischargeFootprint Dimensions Wall Mounting Piping and Electrical Connections Electrical and piping connections, horizontal air discharge152 PFH096A- LGeneral piping arrangement Electrical field connections, 1- to 5-ton units Top Air Discharge ModelsElectrical field connections, 8-ton units Single-phase, 1-3 ton model schematic, typical Three-phase, 3-5 ton model schematic, typical Three-phase, 8 ton model schematic, typical Piping Considerations Piping for Elevation Differences between PFH and EvaporatorCondensing Unit EvaporatorEquivalent lengths for various pipe fittings, ft m Refrigerant charge in Liebert pre-charged R-407C line sets Pre-Charged Line SetsField-Fabricated Line Sets Line Size Length Charge R-407C Ft. m Lb-oz kgLiebert PFH unit charge levels and coupling size Recommended line sizes, OD CuLine charges refrigerant per 100 ft m of Type L copper tube Installation of Piping to UnitsPiping connection sizes and torque Line Size OD Cu Coupling Size Torque, lb-ft. N-mInstall the New Condensing Unit Filter Drier Selection and InstallationRemove Existing Condensing Unit Evaporator Charge Levels General System Charge RequirementsEvaporator Charge R-407C Indoor Unit Models Oz kg Low-Voltage Control Wire Sizing Low-Voltage Control Wire ConnectionsElectrical Connections Electrical Data Nominal Input Voltage- Phase Capacity ElectricalNominal Input Voltage-Phase Capacity Electrical Electrical data-High ambient models 105F/41C 60HzElectrical data-Quiet-Line models 95F/35C 60Hz Electrical data-High ambient models 105F/41C 50HzChecklist for Completed Installation Electrical data Quiet-Line models 95F/35C 50HzHigh Head Pressure CompressorLiebert Lee-Temp Flood Back Head Pressure Control Hot Gas Bypass AdjustmentOperation Hot gas bypass diagram Electrical Failure-Burnout GeneralCompressor Failure Mechanical FailureCompressor Replacement Field verification charge Field Charge VerificationModel Numbers 407C 60 Hz 50 Hz Oz kg Troubleshooting Problem Cause RemedyUni Single-Phase&Three-Phase UPS Environmental SystemsWeb Site Monitoring Etwo
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