Emerson Liebert PEX User manual

Next Generation Critical Cooling

for Room and Row

Liebert PEX

Efﬁciency And Reliability For High Availability Cooling

Condenser

User Manual

Liebert.PEX Condenser

User Manual

Version V1.0

Revision date May 27, 2010

BOM 31011829

Emerson Network Power provides customers with technical support. Users may contact the nearest

Emerson local sales office or service center.

Emerson Network Power Co., Ltd.

Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China

Homepage: www.emersonnetworkpower.com.cn

E-mail: support@emersonnetwork.com.cn

Contents

Chapter 1 Overview ............................................................................................................................................................ 1

1.1 Classification And Models ..................................................................................................................................... 1

1.2 Model Description ................................................................................................................................................. 1

1.3 Main Components................................................................................................................................................. 1

1.4 Technical Parameters ........................................................................................................................................... 2

1.4.1 Mechanical Parameters ............................................................................................................................. 2

1.4.2 Mounting Base Dimensions ....................................................................................................................... 3

1.4.3 Parameters Of Operating Environment ..................................................................................................... 4

1.4.4 Parameters Of Storage Environment......................................................................................................... 4

Chapter 2 Installation .......................................................................................................................................................... 5

2.1 Moving, Unpacking And Inspection....................................................................................................................... 5

2.2 Installation Notes .................................................................................................................................................. 6

2.3 Space Requirements ............................................................................................................................................ 6

2.4 Installation Procedures ......................................................................................................................................... 7

Chapter 3 Application Of Fan Speed Controller .................................................................................................................. 9

3.1 Wiring Terminals ................................................................................................................................................... 9

3.2 HMI ..................................................................................................................................................................... 10

3.3 Operation Description Of HMI ............................................................................................................................. 11

3.3.1 Initial Interface ......................................................................................................................................... 11

3.3.2 Main Menu Interface................................................................................................................................11

Chapter 4 Maintenance And Troubleshooting ................................................................................................................... 14

4.1 Maintenance ....................................................................................................................................................... 14

4.2 Troubleshooting .................................................................................................................................................. 15

Appendix 1 Circuit Diagram............................................................................................................................................... 16

Chapter 1 Overview 1

Chapter 1 Overview

This chapter introduces the classification and models, model description, main components and technical parameters

of the Liebert.PEX condenser (condenser for short).

1.1 Classification And Models

The condenser is classified into two types: single circuit and dual circuit. The single circuit has a set of discharge/liquid

pipe to match the single refrigeration system of indoor unit. The dual circuit has two sets of discharge/liquid pipes to

match the two separate refrigeration systems of indoor unit.

The condenser is available in 17 models. The classification and models are listed in Table 1-1.

Table 1-1 Condenser models

Classification Model

Single circuit LS12, LS18, LSF24, LSF32, LSF38, LSF42, LSF52, LSF62, LSF72, LSF76, LSF85

Dual circuit LDF42, LDF52, LDF62, LDF72, LDF76, LDF85

1.2 Model Description

Taking LSF62 for example, the model description of the condenser is shown in Figure 1-1.

LSF62

Model code

SF: single circuit with fan speed controller

Liebert

DF: dual circuit with fan speed controller

Figure 1-1 Model description

1.3 Main Components

The main components of the condenser include the heat exchanger, fan, fan speed controller and pressure sensor.

The heat exchanger is inside the condenser, and the appearance and position of other components are shown in

Figure 1-2 and Figure 1-3.

Fan

ECB: electrical control box (with

a fan speed controller inside)

Isolation switch

Pressure sensor

Figure 1-2 PEX condenser (single fan, single circuit)

Liebert.PEX Condenser User Manual

2 Chapter 1 Overview

Fans

Pressure sensors (2 pcs)

Electrical control box (with a

fan speed controller inside)

Isolation switch

Figure 1-3 PEX condenser (double fans, dual circuit)

1.4 Technical Parameters

1.4.1 Mechanical Parameters

The condenser structure is shown in Figure 1-4. The mechanical parameters of each model are listed in Table 1-2.

Front view Side view

Figure 1-4 Structure (double fans) (unit: mm)

Table 1-2 Mechanical parameters

Dimension (mm)

Model Weight (kg)

Fan diameter

(mm) Fan number L H W

LSF12 80 500 1 924 990 599

LSF18 80 500 1 924 990 599

LSF24 105 710 1 1374 990 689

LSF32 110 710 1 1374 990 689

LSF38 120 800 1 1374 990 695

LSF42 130 800 1 1574 1273 695

LSF52 140 800 1 1574 1273 695

LSF62 150 710 2 1874 1273 689

LSF72 150 710 2 1874 1273 689

LSF76 220 800 2 2374 1273 695

LSF85 230 800 2 2374 1273 695

LDF42 130 800 1 1574 1273 695

LDF52 140 800 1 1574 1273 695

LDF62 160 710 2 2074 1273 689

LDF72 160 710 2 2074 1273 689

LDF76 220 800 2 2374 1273 695

LDF85 230 800 2 2374 1273 695

Liebert.PEX Condenser User Manual

Chapter 1 Overview 3

1.4.2 Mounting Base Dimensions

Mounting base dimensions for horizontal installation

The mounting base figure for horizontal installation is shown in Figure 1-5, and the specific mounting base dimensions

of each model are listed in Table 1-3.

Amplified part figure

Installation holes

(8 holes in total )

Figure 1-5 Mounting base figure for horizontal installation (unit: mm)

Table 1-3 Mounting base dimensions for horizontal installation (unit: mm)

Model Dimension (L' × H' × D) Model Dimension (L' × H' × D)

LSF12 676 × 837 × 53 LSF76 2126 × 1120 × 53

LSF18 676 × 837 × 53 LSF85 2126 × 1120 × 53

LSF24 1126 × 837 × 53 LDF42 1326 × 1120 × 53

LSF32 1126 × 837 × 53 LDF52 1326 × 1120 × 53

LSF38 1126 × 837 × 53 LDF62 1826 × 1120 × 53

LSF42 1326 × 1120 × 53 LDF72 1826 × 1120 × 53

LSF52 1326 × 1120 × 53 LDF76 2126 × 1120 × 53

LSF62 1626 × 1120 × 53

LDF85 2126 × 1120 × 53

LSF72 1626 × 1120 × 53

Note

The installation holes are long and flat holes. It is recommended to use M10 × 20 bolts to fix the mounting base.

Mounting base dimensions for vertical installation

The mounting base figure for vertical installation is shown in Figure 1-6, and the specific mounting base dimensions of

each model are listed in Table 1-4.

250 102

452

490

2020

Figure 1-6 Mounting base figure for vertical installation (top view) (unit: mm)

Table 1-4 Mounting base dimensions for vertical installation (unit: mm)

Model Dimension ‘a’

LSF12, LSF18 830

LSF24, LDF32, LSF38 1280

LSF42, LDF42, LSF52, LDF52 1480

LSF62, LSF72 1780

LDF62, LDF72 1980

Liebert.PEX Condenser User Manual

4 Chapter 1 Overview

Model Dimension ‘a’

LSF76, LDF76, LSF85, LDF85 2280

Note

1. The installation holes are long and flat holes. It is recommended to use M10 × 20 bolts to fix the mounting base.

2. The upper condenser must be installed on a rack during vertical installation, and the cushion pads should be installed between

the condenser and the rack for reducing vibration. It is prohibited to stack two condensers through bolt connection.

1.4.3 Parameters Of Operating Environment

Refer to Table 1-5 for parameters of operating environment.

Table 1-5 Parameters of operating environment

Item Requirement

Installation position The standard equivalent distance between the indoor unit and the condenser is 30m. Vertical

difference* ∆H: -5m ≤∆H ≤20m. Installation mode: horizontal or vertical mode

Ambient temperature Outdoor temperature: -20°C ~ +45°C. Low temperature accessories are required if the temperature

is between -35°C and -20°C

Ambient relative humidity Outdoor humidity: 5%RH ~ 95%RH

Operation power 400V ± 10%, 50Hz

Altitude ≤1000m. Derating is required if the altitude exceeds 1000m

Protection level Electrical control box: IP55; unit: IP20; fan motor: IP54

Note*:

Condenser fins have a corrosion resistant coating designed to provide maximum life expectancy for the heat exchanger and

protect the aluminium fins from harsh environments. The high performance coating has been tested for 2000 hours exposure to a

5% neutral salt spray test in accordance with ASTMB117 without impact to the coating

Note

When the equivalent distance between the indoor unit and the condenser exceeds 30m, refer to 5.1 Refrigerant Tubing System

in Liebert.PEX Series Air Conditioner Technical Manual for the requirement of the line equivalent length.

1.4.4 Parameters Of Storage Environment

Refer to Table 1-6 for parameters of storage environment.

Table 1-6 Parameters of storage environment

Item Requirement

Storage environment Clean indoor environment with good ventilation and no dust

Ambient temperature -40°C ~ +70°C

Ambient relative humidity 5%RH ~ 85%RH

Storage time The total storage time should not exceed 6 months. Otherwise, the performance needs to be

re-calibrated

Liebert.PEX Condenser User Manual

Chapter 2 Installation 5

Chapter 2 Installation

This chapter introduces the moving, unpacking, inspection, installation notes, space requirements and installation

procedures.

2.1 Moving, Unpacking And Inspection

Moving

It is recommended to use the mechanical transport equipment such as a forklift or a crane when unloading and

transferring the condenser closest to the installation site.

When a forklift is used, insert the tines of the forklift shown in Figure 2-1 (taking the single fan condenser for example).

Forklift

direction

Figure 2-1 Forklift direction

When a crane is used, refer to Figure 2-2 to lift the package (taking the double fans condenser for example).

Note

When lifting the package, fix the cable by leading it through the slots located at the bottom of the pallet. Otherwise, the cable

may slide during the lifting process, and the package may fall to the ground, damaging the pipes inside and resulting in system

leakage.

Figure 2-2 Crane lifting

Unpacking

Remove the timber frame package and foam of the condenser but reserve the protection cardboard of fins. The

protection cardboard of fins and the cushion pad of U tube located at the end of the condenser should be removed

after the condenser is in its installation position.

Liebert.PEX Condenser User Manual

6 Chapter 2 Installation

Note

1. If the condenser is to be placed horizontally, you should complete the installation of legs while the condenser is located

vertically.

2. When moving the condenser by hand, to avoid distortion and system leakage, do not touch the copper pipes.

Inspection

After the product arrival, you should check the accessories against the packing list. If any parts are found missing or

damaged, please report to the carrier immediately. If any covert damage is found, please report to the carrier and the

distributor immediately.

2.2 Installation Notes

The installation notes of the condenser are as follows:

1. To ensure the heat dissipation capacity, install the condenser in the place with smooth airflow. Do not install it where

the coil of the condenser may be obstructed by dust or snow. Ensure that there is no steam or waste heat around.

2. If possible, the horizontal installation is recommended to reduce the noise.

3. The condenser should be installed away from the residential areas (≥15m).

4. Be careful not to damage the waterproof layer and observe the local regulations when the condenser is installed on

the roof of the building.

5. Position the condenser higher than the indoor unit to ensure normal oil return.

6. Follow the installation arrows on the condenser for correct installation direction.

2.3 Space Requirements

Note

1. A 4000mm clearance is required around the condenser air outlet.

2. 600mm service spaces are required on the four sides of the condenser.

The condenser needs sufficient installation and service space around the installation place. The specific space

requirements are shown in Figure 2-3 and Figure 2-4.

450

Airflow

1200

Airflow

600

Figure 2-3 Horizontal installation space requirement (unit: mm)

4000 600

Airflow

Figure 2-4 Vertical installation space requirement (unit: mm)

Liebert.PEX Condenser User Manual

Chapter 2 Installation 7

2.4 Installation Procedures

Note

Before commencing installation hot works, release all nitrogen holding charges from the indoor and outdoor units.

Installing pipelines

Note

1. Protect copper pipes from heat sources. Isolate copper pipes from structures or other obstacles using rigid supports. Avoid dust,

water vapor and irrelevant objects from entering copper pipes.

2. Use a good quality, silver-based solder for all brazed connections. Use refrigeration grade copper pipes and fittings throughout

the installation. Purge all pipes with nitrogen during brazing to prevent oxidation.

1. Identify the pipe sizes

Refer to 2.6 Installing Unit Pipes in Liebert.PEX Series Air Conditioner User Manual for pipe sizes.

2. Identify the condenser installation height

Refer to 2.6 Installing Unit Pipes in Liebert.PEX Series Air Conditioner User Manual for installation height.

3. Install the pipes

Install the pipes according to local and national codes and standards.

Connecting external power (external power supply of the condenser)

1. Identify the cable specifications

Select the power supply cables and start/stop signal cables of the condenser according to site conditions, such as the

distance between the indoor unit and the condenser.

Table 2-1 Operation current of fan under 400V voltage

Condenser Model FLA (A)

LSF12 0.79

LSF18 1.45

LSF24 1.65

LSF32 1.05

LSF38, LSF42, LSF52, LDF42, LDF52 2.4

LSF62, LSF72, LDF62, LDF72 3.3

LSF76, LSF85, LDF76, LDF85 4.8

Note

1. It is recommended to use the 20AWG (0.52mm2) cable as the condenser start/stop signal cable.

2. The outdoor air cooled condenser requires a three-phase, neutral and earth power supply. The indoor PEX unit is the

recommended point of connection for this electrical service and includes a three-pole circuit breaker rated at 16 amps.

3. The cables should not contact hot objects, such as the copper pipe and water pipe without insulation, to avoid damaging the

insulation layers.

4. The cables should be connected in accordance with the local regulations.

2. Connect the cables

See Figure 2-5, Figure 2-6 and Appendix 1 Circuit Diagram for the connections of external power cables.

Liebert.PEX Condenser User Manual

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