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Installation

2.5.6 General System Charge Requirements

Liebert split system units are designed with quick-connect fittings and are factory-charged to proper

levels. Due to the wide range of operating ambients and sensitivity of the system components to

charge level, the system charge must be maintained at recommended levels.

If there is any doubt that the system has the correct refrigerant charge level, the correct

procedure is to remove the entire system charge, evacuate the system and weigh in the

recommended factory charge total for both units and any line sets or field piping.
Tables 7

and

are included for field piping allowances, condensing unit charges, line sets and

evaporator charges.

Total refrigerant charge = evap lines + condensing unit

NOTE

All condensing units and most evaporator units are fully charged with refrigerant. Some

evaporator units are shipped from the factory with a nitrogen holding charge only. (Refer to

evaporator serial tags.) If field-supplied refrigerant piping is installed, refrigerant must be

added to the system. Refer to

Figure 12

for field-supplied piping guidelines.

Table 12

Evaporator Charge Levels

Indoor Unit

Evaporator

Models

Charge R-407C

oz (kg)

Liebert

Mini-Mate2

MMD11/12E

3 (0.085)

MMD17/18E

4 (0.113)

MMD23/24E

7 (0.198)

MMD35/36E

7 (0.198)

MMD59/60E

4 (0.113)

MMD95/96E

7 (0.198) each circuit

Liebert DataMate

DME020E

4 (0.113)

DME027E

5 (0.141)

DME037E

6.5 (0.184)

Liebert Challenger

3000

BF/BU036E

9 (0.255)

BF/BU060E*

13 (0.368)

* Evaporator is charged with nitrogen at the factory

Содержание Liebert Prop Fan Condensing Unit

Страница 1: ...Precision Cooling For Business Critical Continuity Liebert Prop Fan Condensing Unit Installation Operation and Maintenance Manual 50 60Hz ...

Страница 2: ...208 230 1ph 60Hz Y 208 230 3ph 60Hz A 460 3ph 60Hz B 575 3ph 60Hz S 220 1ph 50Hz N 200 230 3ph 50Hz M 380 415 3ph 50Hz R 407C Refrigerant Standard Coil C Coated Coil PFH 0 37 P L 7 A Air Cooled A L 95 F 35 C Ambient Liebert Lee Temp H 105 F 41 C Ambient Liebert Lee Temp Not all options and or voltage combinations are available Example PFH037A PL7 ...

Страница 3: ...e Charged Line Sets 16 2 5 3 Field Fabricated Line Sets 16 2 5 4 Installation of Piping to Units 18 2 5 5 R 407C PFH Installed as a Replacement Condensing Unit in an R 22 System 18 2 5 6 General System Charge Requirements 20 2 6 Electrical Connections 21 2 6 1 Low Voltage Control Wire Connections 21 2 6 2 Low Voltage Control Wire Sizing 21 2 7 Electrical Data 22 2 8 Checklist for Completed Install...

Страница 4: ...air discharge 6 Table 4 Piping and electrical connections top air discharge 7 Table 5 Pipe length and condenser elevation relative to evaporator 15 Table 6 Equivalent lengths for various pipe fittings ft m 15 Table 7 Refrigerant charge in Liebert pre charged R 407C line sets 16 Table 8 Liebert PFH unit charge levels and coupling size 17 Table 9 Recommended line sizes OD Cu 17 Table 10 Piping conne...

Страница 5: ...contain similar components to the base models except the coils and fans are sized to provide catalog capacity of the appropriate evaporator section up to 105 F 41 C outside ambient temperature 1 1 3 Quiet Line Models These models contain similar components to the base models except the coils and fans are sized to provide catalog capacity of the appropriate evaporator section up to 95 F 35 C outsid...

Страница 6: ... send a copy of the claim to Emerson Network Power or your local Emerson sales representative If possible maintain equipment and packaging until it is at the installation location 2 2 Location Considerations To ensure an adequate air supply locate all condensing units in a clean air area away from loose dirt and debris that can clog the coil Avoid ground level sites with public access or areas tha...

Страница 7: ... PFH037A H PFH036A H 53 1343 36 1 4 918 18 457 351 159 PFHZ37A L PFHZ36A L PFH042A H PFH041A H PFHZ42A L PFHZ41A L PFH067A L PFH066A L A B C C Fan Rotation CCW left side Shaded area indicates a minimum clearance of 18 457mm for proper air flow Shaded area indicates a minimum clearance of 18 457mm for proper air flow Shaded area indicates a recommended clearance of 24 610mm for component access and...

Страница 8: ...a minimum clearance of 18 457mm for proper air flow Shaded area indicates a minimum clearance of 18 457mm for proper air flow Shaded area indicates a recommended clearance of 24 610mm for component access and removal DPN000131 Rev 0 Removable panel for access to high voltage and low voltage connections and refrigeration components Top Air Discharge Right Air Intake Left Air Intake 4 23 32 120mm 36...

Страница 9: ...l mount Totally enclosed non ventilated 4 Both brackets are shipped loose with transformer WIRING FOR TRANSFORMER WALL MOUNTING RIGID MOUNTING 4 92 125mm 5 5 140mm 281 7mm Dia For wall mounting 1D18214P1 10 3 262mm 1D18214P2 11 68 297mm Remove screws attach bracket Access to electrical connections from bottom 31 8mm Dia For rigid mounting and shipping 1 4 20 2 screws lock washers for rigid mountin...

Страница 10: ... 7 1 4 184 PFH020A L PFH019A L PFH027A L PFH026A L PFH027A H PFH026A H 2 51 5 3 4 146 8 1 2 216 4 3 4 121 6 3 4 171 8 1 2 216 PFHZ27A L PFHZ26A L PFH037A L PFH036A L PFH042A L PFH041A L PFH037A H PFH036A H 2 51 6 152 8 1 2 216 4 3 4 121 7 3 4 197 8 1 2 216 PFHZ37A L PFHZ36A L PFH042A H PFH041A H PFHZ42A L PFHZ41A L PFH067A L PFH066A L B C A F G D E DPN000132 Rev 0 Liquid Line Quick Connect Male Co...

Страница 11: ... 60Hz 50Hz A B C D E F G PFH067A H PFH066A H 2 51 6 152 8 1 2 216 4 3 4 121 7 3 4 197 8 1 2 216 PFHZ67A L PFHZ66A L PFH096A L PFH095A L 11 1 2 292 System 1 and System 2 on 8 Ton only Electrical Entrance for High Voltage Connection Electrical Entrance for Low Voltage Connection Liquid Line Quick Connect Male Coupling Suction Line Quick Connect Male Coupling System 2 5 Ton DPN000133 Rev 0 System 1 3...

Страница 12: ...Valve Check Valve Liquid Injection Valve Bulb Pressure Relief Valve Sight Glass Liebert Lee Temp Receiver Liquid Line Solenoid Valve Liquid Line Male Quick Connect Coupling Liquid Injection Valve Suction Line Male Quick Connect Coupling SINGLE CIRCUIT SHOWN SINGLE CIRCUIT 1 5 Tons DUAL CIRCUIT 8 Tons Receiver Heater Pressure Limiting Switch Reciprocating compressor 1 Ton 60Hz Scroll compressor 1 T...

Страница 13: ... Bypass Connection Electric service connection to contactor or terminal block Single or three phase electric service not provided by Liebert High voltage electric power supply entrance Low voltage electric power supply entrance Earth ground connection terminal for field wiring Field supplied unit disconnect switch Single or three phase electric service not provided by Liebert Field supplied 24V NE...

Страница 14: ...d supplied unit disconnect switch Single or three phase electric service not provided by Liebert Field supplied 24V NEC Class 2 wiring to evaporator module Heat rejection connection Field supplied 24V NEC Class 2 wiring Wire connections from evaporator module 1 24V GND System 1 2 24V Supply System 1 3 High Pressure Alarm System 1 4 Hot Gas Bypass Connection System 1 5 24V GND System 2 6 24V Supply...

Страница 15: ...he condensing unit See unit nameplate for voltage and amperage requirements 4 All motors have internal line break overload protectors Three phase motors protected for primary single phasing conditions 25 27 Factory Supplied Line Voltage Field Installed Line Voltage Wiring Optional Line Voltage Wiring Factory Supplied 24V NEC Class 2 Wiring Optional 24V Wiring Factory Supplied 24V NEC Class 2 Wirin...

Страница 16: ... 2 3 and 4 are for connection of control circuit from evaporator unit Wiring by others to be NEC Class 2 and sized for 1 volt maximum drop 6 Wire 1 is connected to the grounded side of the 24V Class 2 circuit 7 Receiver heater No 2 RHTR2 supplied on 4 and 5 ton standard models and 3 3 5 ton high ambient and Quiet Line models NOMENCLATURE Standard Devices C1 Condenser Contactor CAP2 Fan Motor Capac...

Страница 17: ...al output in evaporator unit 8 Wires 1 5 and 9 are separately connected to the grounded side of the 24V Class 2 circuit Do not connect them together STANDARD DEVICES C1 Compressor Contactor 1 C2 Compressor Contactor 2 CHTR1 Compressor Heater 1 CHTR2 Compressor Heater 2 COMP1 Compressor 1 COMP2 Compressor 2 F1 Transformer Fuse F2 Transformer Fuse FM Fan Motor HP1 High Pressure Switch 1 Auto Reset H...

Страница 18: ...ble 5 for requirements Traps in refrigerant piping are required when elevation differences exist between evaporator and con densing unit mounting locations See Figure 12 for requirements Table 6 should be used when traps are required with field fabricated piping assemblies to calculate equivalent pipe lengths to determine if installation will comply with Table 5 requirements NOTE Proper safety equ...

Страница 19: ...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 Evaporator Evaporator Condensing Unit Condensing Unit NOTE When installing remote condensing units 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...

Страница 20: ...nit connection sizes Use Table 9 for rec ommended line sizes Prevailing good refrigeration practices should be employed for piping supports leak testing evacua tion dehydration and charging of the refrigeration circuits The refrigeration piping should be iso lated from the building by the use of vibration isolating supports Use a soft flexible material to pack around the tubes when sealing opening...

Страница 21: ...12 PFH042A _H7 PFH041A _H7 PFH067A _H7 PFH066A _H7 51 11 23 45 10 12 Quiet Line PFHZ27A _L7 PFHZ26A _L7 13 5 6 04 6 11 PFHZ37A _L7 PFHZ36A _L7 26 10 12 08 10 12 PFHZ42A _L7 PFHZ41A _L7 PFHZ67A _L7 PFHZ66A _L7 51 11 23 45 10 12 Table 9 Recommended line sizes OD Cu Equiv ft m PFH_14A PFH_13A PFH_20A PFH_19A PFH_27A PFH_26A PFH_36A PFH_37A 3 ton circuit of 8 ton model PFH_42A PFH_41A PFH_67A PFH_66A ...

Страница 22: ...or if used refer to Table 12 2 5 5 R 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 c...

Страница 23: ... shorter interval replacements will be needed Optional Install a new filter drier approved for POE oil in place of the existing one Install the New Condensing Unit 1 Install a stub tube kit on the existing line set connecting to the new condensing unit This kit is available from Emerson or your local Emerson representative 2 Evacuate the evaporator piping system twice to a minimum 250 microns brea...

Страница 24: ...unit charges line sets and evaporator charges Total refrigerant charge evaporator lines condensing unit NOTE All condensing units and most evaporator units are fully charged with refrigerant Some evaporator units are shipped from the factory with a nitrogen holding charge only Refer to evaporator serial tags If field supplied refrigerant piping is installed refrigerant must be added to the system ...

Страница 25: ...ltage Control Wire Sizing Low voltage wiring should be sized to allow a 1 volt maximum drop due to line resistance between the evaporator and condensing unit Use NEC Class 1 or 2 wiring according to wire routing conditions chosen local codes and application limits in Tables 14 and 15 WARNING Use voltmeter to be sure power is turned off before making any electrical connections CAUTION Three phase p...

Страница 26: ...WSA 40 8 19 9 15 4 OPD 60 25 20 FLA Full Load Amps WSA Wire Size Amps minimum supply circuit current capacity OPD Overcurrent Protection Device fuse or circuit breaker Table 17 Electrical data High ambient models 105 F 41 C 60Hz Model Nominal Capacity Tons Electrical Characteristic Input Voltage Phase 208 230 1 208 230 3 460 3 575 3 37 3 FLA 21 3 14 8 7 4 5 9 WSA 25 8 17 7 8 8 7 1 OPD 40 25 15 15 ...

Страница 27: ...n Device fuse or circuit breaker Model 14 20 and 96 are not available in Quiet Line versions Table 19 Electrical data Standard sound and ambient models 95 F 35 C 50Hz Model Nominal Capacity Tons Electrical Characteristic Input Voltage Phase 220 1 200 230 3 380 415 3 13 1 FLA 9 9 19 1 5 FLA 10 9 26 2 FLA 12 7 4 9 36 3 FLA 18 4 7 0 41 3 5 FLA 15 3 8 5 66 5 FLA 24 1 13 2 95 8 FLA 20 3 FLA Full Load A...

Страница 28: ... Power line circuit breakers or fuses have proper ratings for equipment installed ___ 11 Control wiring connections completed ___ 12 All wiring connections are tight ___ 13 Foreign materials have been removed from area in and around all equipment installed shipping materials construction materials tools etc ___ 14 Fans and blowers rotate freely and in the proper direction ___ 15 Blank startup shee...

Страница 29: ...arm The control will turn off the LLSV and delay 10 seconds The control will permit this occurrence two more times or a total of three times If on the fourth try the high head pressure switch trips within 10 seconds the control will annunciate the alarm turn off the LLSV wait for the user to acknowledge the alarm and hold the compressor off for 3 minutes which is the normal short cycle control The...

Страница 30: ...iquid quenching valve bulb must be located downstream of all these connections to control superheat at the compressor inlet Superheat settings for the liquid quenching valve are chosen to maintain con sistency with the system expansion valve During hot gas bypass operation higher superheats 50 60 F 10 15 C may be observed at the compressor The liquid quenching valve is internally equalized and sup...

Страница 31: ...Operation 27 Figure 13 Hot gas bypass diagram ...

Страница 32: ...ailure there will be no burn odor and the motor will attempt to run 4 2 1 Electrical Failure Burnout In the event that there is an electrical failure and a complete burnout of the refrigeration compressor motor the proper procedures must be performed in order to clean the system to remove any acids that would cause a future failure 4 2 2 Mechanical Failure If a mechanical failure has occurred the ...

Страница 33: ... connections 5 Remove failed compressor 6 Install replacement compressor and make all connections 7 Pressurize and leak test the system 8 Follow manufacturer s instructions for cleanout kits 9 Evacuate the system twice to a minimum 250 microns breaking the vacuum with dry nitrogen each time The third time evacuate to 250 microns and verify the above levels are maintained for at least one minute af...

Страница 34: ... ambient 5 ton Quiet Line and 8 ton models consist of two condenser coils and two receivers When restricting airflow on these units the coils should be blocked off proportionally If one coil is restricted significantly more than the other liquid can remain in the restricted coil causing lower levels in the receivers The receiver liquid level should be above the sightglasses in both receivers There...

Страница 35: ...sion valve for 10 15 F 5 6 to 8 4 C superheat at evaporator Defective liquid line solenoid valve Check valve and coil replace if necessary Low compressor capacity no cooling Defective liquid line solenoid valve Check valve and coil replace if necessary Plugged filter drier Check pressure drop across filter drier Replace filter drier Low refrigerant charge Check for normal system operating pressure...

Страница 36: ... referred to are trademarks or registered trademarks of their respective owners Technical Support Service Web Site www liebert com Monitoring liebert monitoring emerson com 800 222 5877 Outside North America 800 1155 4499 Single Phase Three Phase UPS liebert upstech emerson com 800 222 5877 Outside North America 800 1155 4499 Environmental Systems 800 543 2778 Outside the United States 614 888 024...

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