Edwards A50633000 Manual de usuario
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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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
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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
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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.
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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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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
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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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