Emerson Figure i Evaporator, Condensing Unit, Equivalent lengths for various pipe fittings, ft m

Page 19

Installation

Figure 12 Refrigerant piping diagram

Evaporator

Suction Line Piping

Condensing Unit

Below Evaporator

Evaporator

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

NOTE

When installing remote condensing units below the

NOTE

evaporator, the suction gas line should be trapped When installing remote condensing units elow the with an inverted trap to the height of the evaporator. evaporator, the suction gas line should be trapped with

This prevents refrigerant migration to the compres- an inverted trap to the height of the evaporator. This sors during off cycles. Maximum recommended verti- prevents refrigerant migration to the compressors

cal level drop to condensing unit is 15 ft. (4.6m). during off cycles . Maximum recommended vertical level drop to condensing unit is15 ft. (4.6m) .

Condensing

Unit

Condensing

See Table 5 for maximum

Unit

vertical rise recommendation

 

above evaporator.

 

 

Suction Line Piping

Condensing Unit Above Evaporator Traps recommended at the base of riser exceeding 5 ft (1.5m) and every 20 feet (6m) of vertical rise.

Table 5

Pipe length and condenser elevation relative to evaporator

Nominal

 

Max. Equiv.

Maximum PFH

Maximum PFH

 

System Size

Pipe Length

Level Above

Level Below

 

Tons

 

ft. (m)

Evaporator, ft. (m)

Evaporator, ft. (m)

 

1 or 1.5

 

50 (15)

40 (12)

15 (4.6)

 

 

 

 

 

 

 

2

 

100 (30)

40 (12)

15 (4.6)

 

 

 

 

 

 

3, 3.5, 5 or 8

150 (45)

50 (15)

15 (4.6)

 

 

 

 

 

 

 

Table 6

Equivalent lengths for various pipe fittings, ft (m)

 

 

 

 

 

 

 

 

 

 

 

 

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 (0.24)

1.3 (0.39)

0.4 (0.12)

2.5 (0.76)

0.26 (0.07)

7.0

(2.13)

4.0 (1.21)

 

 

 

 

 

 

 

 

 

 

5/8

 

0.9 (0.27)

1.4 (0.42)

0.5 (0.15)

2.5 (0.76)

0.28 (0.08)

9.5

(2.89)

5.0 (1.52)

 

 

 

 

 

 

 

 

 

 

3/4

 

1.0

(0.3)

1.5 (0.45)

0.6 (0.18)

2.5 (0.76)

0.3 (0.09)

12.0 (3.65)

6.5 (1.98)

 

 

 

 

 

 

 

 

 

 

7/8

 

1.45

(0.44)

1.8 (0.54)

0.8 (0.24)

3.6 (1.09)

0.36 (0.1)

17.2 (5.24)

9.5 (2.89)

 

 

 

 

 

 

 

 

 

 

1-1/8

 

1.85

(0.56)

2.2 (0.67)

1.0 (0.3)

4.6 (1.4)

0.48 (0.14)

22.5 (6.85)

12.0 (3.65)

 

 

 

 

 

 

 

 

 

1-3/8

 

2.4 (0.73)

2.9 (0.88)

1.3 (0.39)

6.4 (1.95)

0.65 (0.19)

32.0 (9.75)

16.0 (4.87)

 

 

 

 

 

 

 

 

 

 

1-5/8

 

2.9 (0.88)

3.5 (1.06)

1.6 (0.48)

7.2 (2.19)

0.72 (0.21)

36.0

(10.97)

19.5 (5.94)

 

 

 

 

 

 

 

 

 

 

 

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

15

Image 19
Contents Liebert Prop Fan Condensing Unit = 380/415-3ph-50Hz Example PFH037A-PL7Table of Contents Figures Optional Equipment Prop Fan Condensing UnitsLocation Considerations Equipment InspectionCabinet and floor planning data, horizontal air discharge Dimensional DataNet Weight Model Numbers Dimensional Data, in. mm Lb. kg 60Hz 50HzFootprint Dimensions Wall Mounting Electrical and piping connections, horizontal air discharge Piping and Electrical ConnectionsPFH096A- L 152General piping arrangement Top Air Discharge Models Electrical field connections, 1- to 5-ton unitsElectrical 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 for Elevation Differences between PFH and Evaporator Piping ConsiderationsCondensing Unit EvaporatorEquivalent lengths for various pipe fittings, ft m Line Size Length Charge R-407C Ft. m Lb-oz kg Pre-Charged Line SetsField-Fabricated Line Sets Refrigerant charge in Liebert pre-charged R-407C line setsRecommended line sizes, OD Cu Liebert PFH unit charge levels and coupling sizeLine Size OD Cu Coupling Size Torque, lb-ft. N-m Installation of Piping to UnitsPiping connection sizes and torque Line charges refrigerant per 100 ft m of Type L copper tubeInstall 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-High ambient models 105F/41C 60Hz Nominal Input Voltage- Phase Capacity ElectricalNominal Input Voltage-Phase Capacity Electrical Electrical DataElectrical data-High ambient models 105F/41C 50Hz Electrical data-Quiet-Line models 95F/35C 60HzElectrical data Quiet-Line models 95F/35C 50Hz Checklist for Completed InstallationHigh Head Pressure CompressorLiebert Lee-Temp Flood Back Head Pressure Control Hot Gas Bypass AdjustmentOperation Hot gas bypass diagram Mechanical Failure GeneralCompressor Failure Electrical Failure-BurnoutCompressor Replacement Field verification charge Field Charge VerificationModel Numbers 407C 60 Hz 50 Hz Oz kg Problem Cause Remedy TroubleshootingEtwo Single-Phase&Three-Phase UPS Environmental SystemsWeb Site Monitoring Uni