Edwards A50633000 Manuel utilisateur

A50633880

Issue C

Original Instructions

Instruction Manual

GXS Nitrogen Flow Switch Kit

Description Item Number

Nitrogen Flow Switch A50633000

Nitrogen Flow Switch - High Flow A50634000

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Edwards and the Edwards logo are trademarks of Edwards Limited.

Contents

A50633880 Issue C

Contents

Section Page

1 Introduction ....................................................................................... 1

1.1 Scope and definitions ................................................................................................... 1

1.2 Product description ...................................................................................................... 2

1.3 Construction .............................................................................................................. 2

2 Technical data .................................................................................... 3

2.1 Technical data ........................................................................................................... 3

3 Installation ......................................................................................... 5

3.1 Safety ...................................................................................................................... 5

3.2 Unpack and inspect ...................................................................................................... 5

3.3 Install the flow switch .................................................................................................. 6

3.4 Adjust the flow switch .................................................................................................. 8

4 Maintenance ....................................................................................... 9

4.1 General .................................................................................................................... 9

4.2 Clean the flow switch ................................................................................................... 9

5 Storage and disposal ........................................................................... 11

5.1 Storage ...................................................................................................................11

5.2 Disposal ...................................................................................................................11

Appendix A1 Tube fittings .............................................................................. 13

A1.1 Correct use of tube fittings ...........................................................................................13

A1.1.1 Connect a tube fitting .................................................................................................13

A1.1.2 Reconnect a tube fitting ...............................................................................................13

For return of equipment, complete the HS Forms at the end of this manual.

Illustrations

Figure Page

1 Flow switch kit general arrangement ................................................................................. 7

2 Flow switch kit electrical connection ................................................................................ 8

A1 Connect a tube fitting .................................................................................................14

A2 Reconnect a tube fitting ...............................................................................................14

Tables

Table Page

1 Flow switch parts list ................................................................................................... 6

dcs/7710/08/15

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A50633880 Issue C

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

A50633880 Issue C

1 Introduction

1.1 Scope and definitions

This manual provides installation, operation and maintenance instructions for the Edwards GXS Dry Pumping System

Nitrogen Flow Switch, abbreviated to Flow Switch in the remainder of this manual. Use the Flow Switch as specified

in this manual. Use this manual in conjunction with the GXS pump manual.

Read this manual before you install and operate the Flow Switch. Important safety information is highlighted as

WARNING and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is defined

below.

CAUTION

Cautions are given where failure to observe the instruction could result in damage to the equipment, associated

equipment and process.

The abbreviation slm used in this manual refers to a standard litre per minute, i.e. a flow of one litre per minute

under standard conditions of 1 atm pressure at 0°C.

Notes: 1. The content of this manual may change from time to time with out notice. Edwards accepts no liability

for any errors that may appear in this manual nor does it make any expressed or implied warranties

regarding the content. So far as is reasonably practicable Edwards has ensured that its products have

been designed and constructed so as to be safe and with out risks when properly installed and used in

accordance with Edwards operating instructions. Edwards accepts no liability for loss of profit, loss of

market or any other indirect or consequential loss whatsoever.

2. Product warranty and limit of liability are dealt with in Edwards standard terms and conditions of sale

or negotiated contract under which this document is supplied.

WARNING

Warnings are given where failure to observe the instruction could result in injury or death to

people.

A50633880 Issue C

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

1.2 Product description

The Flow Switch is designed to be externally fitted to an Edwards GXS dry pumping system and connected internally

to the gas module loom.

When installed, the Flow Switch enables the system to monitor the flow of nitrogen purge gas to the dry pumping

system, and to indicate a no-flow condition.

The flow switch is normally open. The presence of a flow of gas, above an adjustable set point, closes the switch.

The actual flow at the switching point depends on the gas supply pressure. For these reasons, the Flow Switch is

suitable for indicating that there is no nitrogen purge flow to the pump system, but it is not suitable for detecting

an abnormally low purge flow.

The flow switch is intended to be used in combination with Edwards suppled flowmeter only. If a flowmeter is not

fitted use either flow monitor 0-60 SLM (A60027043) or flow monitor 0-200 SLM (A60027044) before installing the flow

switch.

1.3 Construction

Refer to Figure 1.

The Flow Switch kit is comprised of:

Flow Switch assembly.

Bracket.

Pipe.

Y cable.

WARNING

This flow switch is designed for use with nitrogen purge gas. However, as an alternative, CDA

(Compressed Dry Air) can be used. It is the user’s responsibility to ensure the selected purge gas

is compatible and safe to use with their process.

WARNING

The Flow Switch is not considered a high integrity safety device by Edwards. For processes where

high dilution flows are required to maintain safety, an appropriate device should be fitted.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Technical data

A50633880 Issue C

2 Technical data

2.1 Technical data

Mass 1.5 kg

Switching voltage 24 V d.c.

Contact rating 50 W(DC)

Maximum switching current 1.0 A(DC)

Accuracy ± 1%

Ambient operating temperature range 5 to 40°C

Maximum ambient operating humidity 90% RH (non condensing)

Maximum working pressure 6.9 bar (100 psig)

Electrical connector type Molex 6W Micro Fit 3.0 Connector

A50633880 Issue C

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Edwards and the Edwards logo are trademarks of Edwards Limited.

Installation

A50633880 Issue C

3 Installation

3.1 Safety

A suitably trained and supervised technician must install the Flow Switch.

Purge and shut down the dry pumping system and disconnect the nitrogen supply before you start

installation.

Disconnect the dry pumping system and the other components in the process system from the electrical

supply so that they cannot be operated accidentally.

If the dry pump system is operating, shut it down and allow it to cool to a safe temperature before you start

installation.

Do not allow debris to get into the Flow Switch system during installation.

Strong magnetic fields may affect the operation of the Flow Switch. Do not locate equipment which

generates strong magnetic fields close to the Flow Switch and do not route electrical supply cables close to

the Flow Switch.

Leak test the system after installation is complete and seal any leaks found to prevent further leakage.

Leakage rate must be less than 1 x 10-5 mbar ls-1.

Ensure that you connect, disconnect and tighten all tube connection components correctly (Refer to

Figure A1 and A2).

Obey all national and local rules and safety regulations when you install the Flow Switch.

3.2 Unpack and inspect

Remove all packing materials and protective covers and inspect the Flow Switch. If it is damaged, notify your supplier

and the carrier in writing within three days; state the Item Number of the Flow Switch together with your order

number and your supplier’s invoice number. Retain all packing materials for inspection. Do not use the Flow Switch

if it is damaged.

If the Flow Switch is not to be used immediately, refit any protective packaging and store the Flow Switch in suitable

conditions, as described in Section 5.1.

Check that your package contains the items listed in Table 1. If any of these items are missing, notify your supplier

in writing within three days.

WARNING

Obey the safety instructions given below and take note of appropriate precautions. Failure to do

so can cause injury to personnel and/or damage to equipment.

WARNING

This flow switch must not be installed as a safety device. Refer to Section 1.2 for further

information.

A50633880 Issue C

Edwards and the Edwards logo are trademarks of Edwards Limited.

Installation

3.3 Install the flow switch

Install the Flow Switch as shown in Figure 1.

Take note of the following points before starting installation:

Do not commence installation with the electrical power on.

Refer to instructions in Appendix A1 for assembly of all compression type fittings.

Refer to Figure 1 for the flow switch assembly components.

Check for electrical continuity in the electrical line from the Flow Switch back to the gas module loom.

Leak check the installation. Leakage rate must be less than 1 x 10-5 mbar ls-1

For electrical connection, refer to Figure 2.

Using the PDT, configure the pump set-up to show the switch as fitted.

Setup> scroll to ‘Fit Accessory’> enter password (538)

Scroll to ‘N2 flow sensor’> select FITTED> Enter.

Confirm operation of switch by reducing purge flow to ensure warning (‘Warning 34.01 N2 purge low’) is displayed

on PDT.

Table 1 - Flow switch parts list

Quantity Description Check ()

1 Pipe 

2 Male connector 

2 6-32 UNC x 3/8 inch screw 

2 M4 flat washer 

2 M4 single coil washer 

1 Flow Switch and bracket 

1 Label 

1 Isolation plate 

1 Y cable 

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