D808 Motor System - Expo Technologies

D808 Motor System - Expo Technologies
D808/ET MiniPurge Manual
ML 501
IMPORTANT NOTE
It is essential for safety that the installer and user of the Expo system observe the following instructions:
Please refer to the standard for principles and definitions.
(N.B. These instructions apply only to the Pressurizing system. It is the responsibility of the manufacturer
of the Pressurized Motor Enclosure to provide appropriate instructions for the Enclosure.)
Contents
1. D808 MiniPurge - General System Specification
3. Application Suitability
4. Description of Operation
5. Main Components
6. Installation of the System
7. Commissioning
8. Changing the flow rate
9. Maintenance of the System
10. Fault Finding
12. Recommended Tools List
13. Drawings and Diagrams
14. Certificates
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1. D808 MiniPurge - General System Specification
Pressurized Motor Housing
Pressurized Motor Enclosure : A range of Electrical Motor housings
Classification
: Zone 1 Group IIC
Volume (Litres)
: Various, system settings determined by motor manufacturer.
Total Purge Flow Rate
: To be supplied by customer and must include flow to compensate for leakage.
Estimated Purge Time
: To be determined by purge test.
Contents of Enclosure
: Electrical motor.
Access covers
: ¼ turn fastener, key provided.
Enclosure Pressure
: Normal : 10 mbarg. (Alternative set-points are available) This is also the set
point of the Automatic Leakage Compensation Pressure Sensor (CLAPS
Sensor)
Enclosure Test Pressure
: Motor Test Pressure = Relief Valve opening pressure x 1.5
MiniPurge Control Unit(CU) Data
Model Number
: 7XLC/ss/ET/OV/PA/PC
Special Design Number: D808SYS
Option codes
: ET = Electronic Purge Timer
: OV = Outlet Valve is pneumatically operated
: PA = Integral Ex e Power & Alarm terminal box
: PC = Pressurized Enclosure (Motor) Pressure Control Automatic
Leakage Compensation Valve (CLAPS system)
Action on Pressure Failure : Alarm and Trip (Isolate power / motor) User adjustable “Alarm Only”
System Type
: ThinMani MiniPurge System
Type of Operation
: Automatic Leakage Compensation using the "Closed Loop Automatic
Pressurization System" (CLAPS)
Purge Flow Capacity
: Up to 14,000 Nl/min @4.2 barg inlet pressure
Leakage Compensation
Capacity
: Up to 5100 Nl/min
Enclosure Type
: Stainless Steel 316
Mounting method
: Wall mounting lugs & spacers. Fixing holes as per drawing D808-GA.
Temperature Limits
: -20ºC to +55ºC ambient temperature.
Air Supply
: Clean Dry Oil Free Air or Inert Gas. Pressure 4.2 - 8 barg.
Minimum flow rate = (purge flow + motor leakage) +15%
Logic Regulator & Gauge
: Factory set to 2.3 barg.
CLAPS Regulator & Gauge : Set to system requirements
Process Connections
: Purge Supply and Outlet to Motor: 2” NPT female.
Minimum Supply Line 50mm (2”) I.D Tube
Reference points & signals: 1/8” NPT female
Visual Indicators
: Alarm/Pressurized (Red / Green)
: Intermediate Low Pressure (Red / Green)
: System Purging (Black / 4 x Yellow LEDs to indicate elapsed time)
Purge Complete Switch
: DPNO electrical switch, contact ratings AC-15 250 Vac 4 Amps,
Ex d IIC T6
Low Pressure Switch
: SPCO electrical switch, contact ratings AC-15 250Vac 4 Amps,
Ex d IIC T6
Intermediate Switch
: SPCO electrical switch, contact ratings AC-15 250 Vac 4 Amps,
Ex d IIC T6
Purge In Progress Switch
: SPCO electrical switch, contact ratings AC-15 250 Vac 4 Amps,
(Optional)
Ex d IIC T6
High Pressure Switch
: SPCO electrical switch, contact ratings AC-15 250Vac 4 Amps,
(Optional)
Ex d IIC T6
Signal Terminal box
Sensors (-0,+0.7 mbar)
: Stainless Steel, Ex e IIC T5 Gb (T amb : -20ºC to +55ºC) IP66 /
Ex e IIC T4 Gb (T amb : -20ºC to +60ºC) IP66, Mounted inside D808 system
c/w terminals, front access cover & gland plate on bottom of D808 system.
: Low Pressure calibration range:
Minimum :
1.5 mbarg
Maximum:
5.0 mbarg
Default setting:
1.5 mbarg
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Other Sensors (-0, +10%)
: Intermediate Pressure calibration range. Minimum:
Maximum:
Default setting:
3.0 mbarg
6.0 mbarg
4.0 mbarg
Other Sensors (-10, +0%)
: High Pressure calibration range.
Minimum:
Maximum:
Default setting:
20 mbarg
35 mbarg
32 mbarg
: Purging Flow OK set at
Factory set to provide required
Purge flow rate
Minimum:
10.0mbarg
Maximum:
15.0mbarg
Default setting:
10.0mbarg
: CLAPS sensor calibration range
Note:
There must be a 1.5mbarg difference between the Minimum Pressure & Intermediate Sensor and a 5.0mbarg difference
between the RLV lift-off point and the CLAPS Sensor. i.e. Minimum Pressure = 3.0mbarg, Intermediate Pressure 5.0mbarg,
CLAPS Sensor 10mbarg RLV Lift off at 20mbarg.
Purge Time
: User selectable up to 99 (-0, +3 seconds) minutes in 1 minute increments.
Default set to 99minutes
Weight
: 70 kg (154 lb)
Approvals
ATEX Certificate:
0518
Sira 01ATEX1295X
II 2 (2) G D
Ex [px] ia IIC T6 Gb
Ex [p] ia IIIC T95ºC Db
Tamb -20ºC +55ºC
IECEx Certificate:
IECEx SIR07.0027X
Ex [px] ia IIC T6 Gb
Ex [p] ia IIIC T95ºC Db
Tamb -20ºC +55ºC
INMETRO - TUV Certificate:
TÜV 12.1462X
Ex [px] ia IIC T6 Gb
Ex [pb] ia IIIC T95ºC Db
Tamb -20°C to +55°C
For limitations and conditions of use refer to the applicable
Certificates, see section 13 at the back of this manual.
Pressure Relief Valve (RLV) / Purge Outlet Valve with Integral Spark Arrestor
Type
: RLV200/ss/FS
Bore
: Purging Ø188mm, Relief Valve Ø150 mm
Relief Valve lift–off calibration
: Minimum
20 mbarg
(+0,-20%)
: Maximum
35 mbarg
: Default
30 mbarg
Flow rate
: Factory set to
6000 to 15000 Nl/min
Material
: Housing:
Stainless Steel 316L
: Gasket :
Neoprene
: Spark Arrestor
Stainless Steel mesh
Mounting method
: Rectangular cut-out & fixing holes as per drawing.
Weight
: 23 kg (50.6 lb)
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2. Quick User Guide
2.1 Installation
2.1.1 Mount the purge system as per the Hook-Up drawing.
2.1.2 Always ensure the system has been installed as per the full instructions in section of the
manual titled ‘Installation of the System’.
2.1.3 Always ensure all piping is clean and free of dirt & debris prior to connection to the purge
system or enclosure.
2.1.4 Installation of a local isolation valve on the air supply to the purge system is strongly
recommended.
2.1.5 Note: Most faults are due to the air supply being restricted, the air supply pipe work installed
being too small or a drop in air supply pressure during purge.
2.2 Operation of System
Note: See D808-GA sheet 2 for number references in brackets
2.2.1 Once installed correctly turn on air supply.
Indicator
Low Pressure (8)
Intermediate Pressure (9)
Purge Complete (31)
Colour
Red
Red
Black
Status
Pressure Alarm, enclosure pressure too low
Pressure Alarm, enclosure pressure too low
Purge flow too low, (or not in the purge mode)
2.2.2 Purge system starts off in leakage compensation.
2.2.2.1 Once the CLAPS regulator (29) has been adjusted to increase enclosure pressure, the
purge flow regulator (25) can be opened and purge air will enter the enclosure
2.2.2.2 Within the Relive Valve unit, the Purge Outlet Valve will open
2.2.2.3 The air will then exit the Relieve Valve housing, via the Spark Arrestor
Indicator
Colour
Status
Low Pressure (8)
Green
Pressure Alarm, enclosure pressure too low
Intermediate Pressure (9) Green
Pressure Alarm, enclosure pressure too low
Purge Complete (31)
Black
Purge flow too low, (or not in the purge mode)
2.2.3 Once enough purge air flow is measured the system will start the timed purge cycle.
Start a stopwatch when the Purging Indicator (31) flashes “Yellow”
Indicator
Low Pressure (8)
Intermediate Pressure (9)
Purge Complete (31)
Colour
Green
Green
Yellow (Flashing)
Status
Pressurized
Pressurized
Purge Flow above the minimum
2.2.4 After the purge has completed without interruption for the set purge time, the system will show
Purge Complete. Stop the stopwatch when the Purging Indicator (31) turns "Black".
Indicator
Colour
Status
Low Pressure (8)
Green
Pressurized and in Leakage Compensation mode.
Intermediate Pressure (9) Green
Pressurized
Purge Complete (31)
Black
No longer in the purge mode
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2.2.5 Ensure the purge time measured is equal to or greater than the purge time calculated by purge
test.
The actual purge time recorded must NEVER be less than the purge time required.
2.2.6 Check/set the CLAPS sensor by following step 7.3.5.
2.2.7 System is now in Leakage Compensation mode and working correctly
If the system has not worked as expected check the installation thoroughly. Read section 7 in this
manual called “Commissioning”
If an obvious problem has not been highlighted and corrected then follow the checks in the section
“Fault Finding”.
If the checks have been made and the system will still not work then please contact your local
distributor or EXPO.
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3. Application Suitability
MiniPurge Systems are certified for use in Hazardous Areas, where the Hazardous Area is nonmining (i.e. above ground) and the hazard is caused by flammable gasses, vapours or dust.
Depending on the model, the systems may be used in IECEx and ATEX Zone 1(21) and Zone 2(22) Categories 2 and 3 respectively.
MiniPurge systems may be used for hazards of any gas group. However, apparatus associated with
the MiniPurge system, such as intrinsically safe signalling circuits and flameproof enclosures
containing switching devices may be limited in their gas group. The certification documentation
supplied with any such devices must be checked to ensure their suitability.
The following materials are used in the construction of MiniPurge systems. If substances that will
adversely affect any of these materials are present in the surrounding environment, please consult
Expo for further guidance.
Materials of construction:
• Stainless Steel
• Mild (carbon) Steel
• Brass
• ABS
•
•
•
•
Aluminium
Nylon
Polyurethane
Polycarbonate
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•
•
•
•
Acrylic
Silicone Rubber
Neoprene
Polyester (glass filled)
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4. Description of Operation
4.1 Principle of Operation
The MiniPurge system is pneumatic in operation, with electric interfaces.
“Pressurization” is a method of protection used in Zone 1 and Zone 2 Hazardous Locations to ensure
that the interior of an electrical enclosure, for example the motor housing, is free of flammable gas.
With the utilisation of the Expo MiniPurge system, the motor may be used safely in a hazardous
environment.
4.2 Sequence of Operation
Clean uncontaminated compressed air, or an inert gas, from a non-hazardous area is admitted to the
motor enclosure to keep the internal pressure above the pressure outside. External flammable gas
cannot enter the enclosure while it is pressurized.
Before power can be switched on, the enclosure must be “purged” to remove any flammable gas that
might have entered the enclosure before it was pressurized. “Purging” is the action of replacing the
air inside an enclosure with air known to be free of flammable gas. The duration of the “purging” time
is normally ascertained on an electrical motor by performing a “Purge Test”.
At the end of the “Purging” cycle the system will switch to Leakage Compensation mode. The Purge
Outlet Valve is closed and the flow of purging air is reduced to a level where there is enough flow of
air to compensate for any leakage of air from the enclosure whilst maintaining the minimum overpressure state. Interface contacts are provided within the system to provide an interlock to the motor
control gear.
In the event of pressure failure within the motor housing the system will raise an alarm in the form of
visual indicators and a volt free contact depending on the specification of the system. The default
action on loss of pressurization by the MiniPurge is “Alarm and Automatic Disconnect of Power”
(A&T – Alarm and Trip). This can be changed by the customer to “Alarm Only” (AO), please refer to
Section titled ‘Main Components’ - “Alarm Only” circuit.
The Motor MiniPurge system incorporates a "Closed Loop Automatic Pressurization System"
(CLAPS) whereby the system will detect a fall or rise in the motor internal pressure & automatically
compensate by increasing or decreasing the leakage compensation flow rate into the motor. This
system has been specifically designed to maintain a stable internal motor pressure during motor
start-up when pressure peaks or drops are particularly prevalent or when changes in pressure are
caused by running temperature variations.
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5. Main Components
Note: See D808-GA sheet 2 for number references in brackets
5.1 Air Supply Filter (1):
The unit is provided with a 50-micron liquid / dust filter element as a precaution. The user of the
MiniPurge system must ensure that air supply is to the quality stated in ‘Air Supply Quality'
paragraph found in the Installation section.
5.2 Regulators:
5.2.1 Logic Air Supply Regulator(27):
This device provides the system with a stable logic pressure supply for consistent operation. The
pressure level is factory set to 2.3 barg and can be verified by means of the integral pressure
gauge. It should only be adjusted if the gauge indicates that the regulated pressure is incorrect.
5.2.2 Purge Flow Regulator(25):
This regulator controls the volume of purge air flowing through the system. It can be adjusted as
required to give the desired purge air flow during commissioning (see section 7.3.6)
5.2.3 CLAPS Regulator(29):
The CLAPS regulator controls air flow into the motor during normal operation. Is should be
checked/set during commissioning (see section 7.3.5)
5.3 Logic Manifold:
This black block contains most of the logic components in the system and can be thought of as a
pneumatic printed circuit board. It has internal passageways that interconnect the components with
facilities for connections to the off-manifold items. It incorporates the following major items:
5.3.1 Low Pressure Sensor(16):
The pressure inside the Pressurized Enclosure is monitored continuously by these devices.
When the pressure is correct i.e. above the minimum pressure specified for safe operation, it
provides a “Pressurized” output signal that can be seen by the operator e.g. displayed on a
local Red/"Green" visual indicator. The sensor is factory calibrated to operate on a falling
pressure at or above the minimum specified pressure.
5.3.2 Purge Flow Sensor(12):
The purge flow through the Relief Valve (RLV) / Purge Outlet Valve is monitored by this
device. When the purge flow is correct i.e. above the minimum purge flow specified for correct
purging, the sensor provides a “Purging” output signal that activates the timer switch. The
sensor is factory calibrated to operate on a falling flow rate at or above the minimum specified
flow rate.
5.3.3 CLAPS Sensor(21):
This sensor monitors the pressure within the motor and then sends a proportional control
signal to the "CLAPS Regulator" to either increase or decrease the flow of air into the motor
enclosure to maintain a stable running pressure. The normal motor running pressure must be
determined prior to system start-up so that the CLAPS Sensor may be set to the desired level
to control the CLAPS Valve
5.3.4 Purge Timer(32):
When the PE pressure is correct and the correct Purge Flow is taking place, the Purge Flow
Sensor activates the Timer Switch allowing the Electronic Timer to initiate. The time delay is
determined by the pre-settable switches mounted on the Timer module. Whilst timing, a visual
indication of elapsed time is provided using 4 LEDs. The LEDs of the timing indicator will flash
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in turn whilst the timer is running. LED1 will flash from 0 - 25% of elapsed time. LED2 from 25
- 50% of elapsed time. LED3 will flash from 50 - 75% of elapsed time. LED4 will flash from 75
- 100% of elapsed time.
When the Timer completes it energises the Intrinsically Safe solenoid “Timer Valve” for
approximately 1 second which allows a latch signal to the “Purge Complete” Valve.
5.3.5 “Alarm Only” circuit. The system normally will cut off the electrical power to the PE if
the enclosure pressure is too low. In certain circumstances, where local codes of practice
allow, the system can be altered to provide a hold-on circuit that will maintain the electrical
power supply to the PE while also providing a “Pressure Failure Alarm”. The user must
respond to the Alarm and either restores the pressure to the PE or otherwise make the
installation safe e.g. shut off the electrical supply. The decision to use the “Alarm Only”
facility, and the length of time during which the enclosure is allowed to operate un-pressurized,
is the responsibility of the user.
Warning:
It is potentially dangerous to energise the Pressurized Motor Enclosure in an un-pressurized
condition, when it is known there are potentially explosive hazardous gases in the area.
5.4 Purge Complete (Motor Interlock) Switch(10):
A Flameproof “Ex d IIC” Power Switch is located on a plate next to the logic manifold, with a
pneumatic actuating piston. The cable from the switch is terminated in an “Ex e II T100ºC (T amb -20ºC
to +55ºC) IP66” terminal box. Rated voltage/current: 250Vac, 4A (AC-15)
5.5 Alarm/Pressurized Low Pressure Switch(11):
Like the Motor Interlock Switch this “Ex II” device is operated by the “Pressurized” signal and
provides the facility for a remote electrical system status indicator to show “Pressurized” or “Pressure
Failure Alarm”. The cable from the switch is terminated in an “Ex e II T100ºC (T amb -20ºC to +55ºC)
IP66” terminal box. Rated voltage/current: 250Vac, 4A (AC-15)
5.6 Intermediate Pressure Switch(15):
A Flameproof “Ex d IIC” Power Switch is located on a plate next to the logic manifold, with a
pneumatic actuating piston. The cable from the switch is terminated in an “Ex e II T100ºC (T amb -20ºC
to +55ºC) IP66” terminal box. Rated voltage/current: 250Vac, 4A (AC-15)
5.7 Visual Indicators:
Visual indicators are fitted to the MiniPurge Control Unit to provide local status information to the
operator:
5.7.1 The “Low Pressure” indicator(8) has two states:
 Red
= “Pressure Alarm” i.e. “Enclosure Pressure too low”
 Green*
= “Pressurized”
5.7.2 The “Intermediate Pressure” indicator(9) has two states:
 Red
= “Pressure Alarm” i.e. “Enclosure Pressure too low”
 Green*
= “Pressurized”
5.7.3 The “Purge Complete” indicator(31) has two states:


Black*
= “Purge flow too low” (or not in the purge mode)
Yellow (Flashing)= “Purge Flow above the minimum”
* This combination is the indication during normal operation of the Pressurized Enclosure after the initial purging process
has been completed.
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5.8 Relief Valve (RLV) / Purge Outlet Valve:
5.8.1The RLV unit allows the purge air to exhaust safely from the enclosure via an in-built Spark
Arrestor. The Spark Arrestor is designed to prevent the emission of arcs, sparks and
incandescent particles produced by normal operation or an electrical fault within the PE.
5.8.2During purge cycle, a pneumatic cylinder operates a Purge Outlet Valve that lets the air in
the enclosure vent out through the RLV. When the system changes to leakage compensation
mode, the Purge Outlet Valve is closed and the enclosure sealed.
5.8.3Purge air passes through the RLV and a correctly selected orifice plate will ensure that the
Purge Flow Sensor is activated once the selected purge flow has been attained. This is via a
pressure differential across an orifice.
5.8.4The RLV unit has an in-built Relief Valve sized to ensure that, if the air supply pressure rises
up from the specified maximum Normal Working Pressure, the internal enclosure pressure will
not exceed the PE specified maximum working pressure.
5.9 /PA Terminal Box
Increased Safety
Ex e IIC T5 Gb
Ex tb IIIC T100ºC Db IP66
Tamb -20ºC to +55ºC
Ex e IIC T4 Gb
Tamb -20ºC to +60ºC
The Terminal Box is “Increased Safety “ (Ex e) certified and incorporates the terminal connection
points for the alarm & interlock circuits. All contacts provided are Volt free (dry).
Cable entry methods (e.g. conduit or glands) shall conform to IEC / European or other relevant
local codes. The main requirement is that IP54 or IP66 (for dust applications), or better ingress
protection must be provided by the use of seals or washers. Cable glands must be “Ex” certified if
they are non-metallic.
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6. Installation of the System
This equipment is designed for use under normal industrial conditions of ambient temperature,
humidity and vibration. Please consult Expo before installing this equipment in conditions that may
cause stresses beyond normal industrial conditions.
The MiniPurge system shall be installed in accordance with relevant standards, such as IEC / EN
60079-14, and any local codes of practice that are in force.
6.1 Air Supply Quality
The MiniPurge system should be connected to a protective gas supply, which is suitable for purging
and pressurization. The supply pipe connection to the MiniPurge is via female 2” NPT fitting, but
the supply pipe shall be sized for the maximum input purge flow rate for the application, also taking
motor leakage rate into account, and regulated to 6 barg. The air supply to the filtration system must
be clean, non-flammable, from a non-hazardous area and free from water and oil to BS ISO 8573-1:
2001 Class 2.2.1 or relevant local standards. This is typically referred to as “Instrument Air Quality”.
Although equipment will operate with lower air quality, the operational life of the system will be
adversely affected. The equipment that is being protected may also suffer from poor air quality.
Solid Particles:
Humidity:
Oil content:
0.5µm < particle size ≤ 1µm, maximum 1000 particles/m3
-40ºC* pressure dewpoint
≤0.01mg/m3 concentration total oil
* For applications where Tamb ≤ 0ºC, the air supply should be Class 2.1.1, with Humidity: -70ºC
pressure dewpoint.
The air supply must be regulated to a pressure less than the maximum stated inlet pressure.
Prior to connecting the air supply to the purge system, flush the supply pipe work with air to remove
any debris that may have been introduced into the pipe work during installation. At least 10 seconds
for every meter length of supply pipe.
Unless a supply shut-off valve has been specially fitted to the MiniPurge system, an external shutoff
valve with the same, or larger, thread size as the CU inlet fitting should be fitted by the installer to
prevent any restriction of purge flow.
The purge air from the MiniPurge CU should be piped within the PE to ensure purging of potential
dead air spots.
Warning: The correct logic supply pressure is vital to the reliability and calibration of the
system therefore should not be adjusted.
6.2 Location
The MiniPurge Control Unit (CU) should be installed either directly on or close to the Motor PE. If
not installed on the PE it should be as close as possible. It should be installed so that the system
indicators and certification labels may be readily observed.
6.3 Relief Valve: To achieve efficient purging, the points where air enters and exits the PE should
normally be at opposite ends of the enclosure. The RLV must be mounted vertically and there
should be a minimum clearance of 600mm (24”) around the Spark Arrestor (purge outlet).
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It is important that the interior and exterior of the Spark Arrestor is kept clean and debris is not
allowed to accumulate which might affect the calibration of the device. In particular the exterior of the
Spark Arrestor should not be painted or blocked off in any way.
6.4 Serial numbers All parts of any system carry a common serial number. If installing more than
one system, ensure that this commonality is maintained on each installation.
6.5 Piping Unless the MiniPurge is directly connected to the PE, any piping, conduit and fittings
used to connect to the CU to the PE should be metallic or appropriate to the environment into which
the system is installed. No valve may be fitted in any tube connecting the CU to the PE. Additional
consideration should always be given to local codes of practice.
6.6 Multiple Enclosures This purge system is not suitable for multiple enclosures.
6.7 Provision and Installation of Alarm Devices The system has a Minimum Pressure Sensor set
to a pressure of least 1.5 mbar. When the PE pressure is above this set point the sensor produces a
positive “Pressurized” signal. The relevant indicator on the CU will change from Red to “Green”.
When the enclosure pressure falls below the set point of the sensor the “Pressurized” signal is
removed, i.e. absence of the signal indicates a “Low Pressure Alarm" condition. The indicator on the
CU will change from Green to “Red”.
There are volt free (dry) contacts available within the Terminal Box for remote usage. The user must
make use of this alarm facility in accordance with the local Code of Practice for “Action on Pressure
or Flow Failure”. Most Codes include the following recommendations:
ATEX Category 2 (Zone 1) Installations: Alarm and Automatic Trip off Power.
ATEX Category 3 (Zone 2) Installations Alarm Only on pressure or flow failure with power
removed manually.
being
6.8 Power Supplies and their Isolation All power entering the PE shall be provided with a means of
isolation. This requirement also applies to any external power sources that are connected to
equipment such as “volt-free” (dry) contacts within the PE. For motor applications it is normally via
the “Motor Interlock Switch.”
6.9 Purge Complete (Motor Interlock) Switch
This switch is double-break switch, that provides two independant contacs. These two contacts shall
be connected in series and shall be used to isolate the power into the motor. This may be achieve by
means of a contactor or other switching device suitable for the application.
It is responsibility of the user to ensure that switch is operated only within the technical limits that
apply to it, i.e. rated current & voltage shall not be exceeded.
The two contacts of the switch are terminated, and accessible by the user, in the system terminal
box.
The switch must be replaced after any short circuit that occurs in the main circuit. The switch is a
piece of encapsulated equipment and it is therefore not posible to check the state of the switch
contacts. It is not permisible to technically modify the switch.
Before commissioning check that the terminal box is clean, the connections have been made
properly, the cables have been laid correctly and all screws in the terminals are tightened securely.
The safety related with the use of this switch is responsibility of the user. All electrical installations
must conform to the local codes of practice.
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Exception: Power to other apparatus that is already suitable for the hazardous area need not be
isolated by the MiniPurge system.
In all cases the application and the isolation of the power must be controlled by the MiniPurge
system using the “Motor Interlock” signal.
The electrical installation must conform to the local codes of practice.
No switches are permitted between the Power Switch and the MiniPurge system other than an
authorised “Manual Override” circuit.
7. Commissioning
Note: See D808-GA sheet 2 for number references in brackets
7.1 Initial Commissioning.
7.1.1 The CLAPS Regulator (29) can be set finally only when the enclosure has been installed in
its permanent operating location.
7.1.2 Check that the system has been installed in accordance with Expo Instructions.
7.1.3 Disconnect the supply pipe from the inlet to the MiniPurge system and blow clean air
through it for at least 10 seconds per meter of length to remove any debris, oil and
condensation.
7.1.4 If any of the Pressure sensors or the RLV have drifted out of calibration they may be reset
by following the instructions in Section 8 Maintenance of the System
7.2 Low Pressure Checks
7.2.1 Preparation
7.2.1.1 Connect the manometer to the Lower Pressure Sensor (16) by removing the Red plug
7.2.1.2 Set Electronic Timer (32) to 1 minute purge time
7.2.1.3 Turn on the main air supply
7.2.1.4 The CLAPS Regulator may required increasing, until the minimum pressure is achieved.
Once minimum pressure is achieved the system will gently cycle, progress to the next step.
7.2.1.5 Open the Purge Flow Regulator (25) slowly until the Purge In Progress Indicator (31)
starts flashing.
7.2.1.6 Allow the system to complete the “short purge” cycle and enter into Leakage
Compensation mode
7.2.2 Pressure Set Point Check
Gradually reduce the CLAPS Regulator (29) watching the manometer that is connected to the
Low pressure sensor (16).
7.2.2.1 Intermediate Sensor (23)
Note the pressure at which the Intermediate Pressure Indicator (9) turns from Green to Red
7.2.2.2 Low Pressure Sensor (16)
Continue to slowly reduce the enclosure pressure and note the point at which the Low
Pressure Indicator (9) turns from Green to Red
ML501 v10
24-Aug-15
Page 13 of 20
Note 1: The system will remain in this condition until the CLAPS regulator is increased again to above the Low Pressure sensor set point. At this point
the system will re-enter the purge sequence.
Sensor checking is now complete, remove the manometer from the Low pressure sensor (9)
and replace the plug removed in step 7.2.1.1. Reset the Electronic Timer (31) to give the
correct purge time.
7.3 Over Pressure Verification
The following sequence will isolate all the MiniPurge protection mechanisms. Great care must
be taken to follow these steps closely.
7.3.1 Preparation
7.3.1.1 Ensure the Isolation Valve is closed
7.3.1.2 Ensure that the Purge Flow Regulator (25) is closed. Turn counter-clockwise
hard stop
up to
7.3.1.3 Ensure that the CLAPS Regulator (29) is closed. Turn counter-clockwise
handle turns freely
until
7.3.1.4 Slowly open the Isolation valve. The system
should come up to pressure with no air passing
into the Motor. If this is not the case repeat steps
7.3.1.1 to 7.3.1.3.
7.3.1.5 Seal the outlet of the RLV at the Spark Arrestor
using Expo part KRV-0000-005 (sold separately)
7.3.1.6 Remove the green pipe running into the
Enclosure Pressure port [A] and connect a manometer instead
Warning: The system now has all its protection mechanisms isolated!
7.3.2 Over Pressure Tests
7.3.2.1 Very slowly increase the CLAPS Regulator (29) by turning the handle clockwise
7.3.2.2 The pressure in the Motor will start to rise and the Leakage rates can be taken of the
required enclosure pressures
7.3.2.3 The over pressure and deformation pressure test can also be carried at this time
7.3.2.4 Once complete reduce enclosure pressure again by turning the CLAPS Regulator (29)
Anti-clockwise
7.3.3 High Pressure Sensor (24)
7.3.3.1 Re-connect the green pipe to the Enclosure Pressure Port [A] that was disconnected in
step 10 above.
7.3.3.2 Remove the green pipe to the Low Pressure Sensor(16), and connect the manometer
to the pipe
7.3.3.3 Very slowly increase the CLAPS Regulator(29) by turning the handle clockwise
ML501 v10
24-Aug-15
Page 14 of 20
7.3.3.4 Note the enclosure pressure when the High Pressure sensor(24) isolates the purge in
gas. This state will be marked by a sudden drop in the enclosure pressure. Note the
system will cycle between purge and trip at this point.
7.3.3.5 Once complete reduce enclosure pressure again by turning the CLAPS Regulator(29)
Anti-clockwise
7.3.4 Relief Valve
7.3.4.1 Remove the RLV Sealing bracket fitted in step above
7.3.4.2 Remove the green pipe running into the High Pressure Sensor (24) and cap the pipe
with a push on fitting
7.3.4.3 Very slowly increase the CLAPS Regulator (29) by turning the handle clockwise
7.3.4.4 Note the enclosure pressure when the RLV opens. This state will be marked by a
sudden drop in the enclosure pressure.
7.3.5 CLAPS Sensor (21)
7.3.5.1 Reduce the enclosure pressure to below the CLAPS set point by turning the CLAPS
Regulator (29) Anti-clockwise.
7.3.5.2 Now slowly increase the enclosure pressure until the CLAPS set point has been
reached. Lock the regulator by securing the backing nut
High pressure tests are now complete; reconnect the High Pressure Sensor [(24), step 7.3.4.2] and
the low pressure sensor [(16), step 7.3.3.2]. When the low pressure sensor (16) is reconnected the
system will attempt to purge the enclosure.
7.3.6 Flow Verification
Connect the (+) port of a manometer to the D.P. High bulkhead
[B] and the (-) port to the D.P. Low Bulk head [C]
7.3.6.1 Slowly increase the Purge Flow Regulator (25)
until the Purge Complete Indicator (31) turns from Black
to Yellow.
7.3.6.2 Now slowly decrease the Purge Flow Regulator
(25) until the indicator turns from Yellow to Black. The
Pressure difference read on the manometer should be
greater than 6.4mbar.
7.3.7 Timer Verification
The purge timer will start as soon as the Purging indicator (31)
flashes “Yellow”. Measure the time required for the indicator to turn
black, this must not be less than the required purge time for the
enclosure.
ML501 v10
24-Aug-15
Page 15 of 20
7.4. Changing the flow rate
The system will be pre-set by Expo with an orifice plate to give the requested flow rate, available flow
rates are 7000, 8000, 10000, 12000 and 14000Nl/min.
If required the flow rate can be altered by changing the orifice plate, which can be done with the RLV
in-situ by following the steps below:
7.4.1 – Remove the rear access plate by undoing the 10 screws around its edge
7.4.2 – Remove the plastic tube (A) from the fitting on the plunger body
7.4.3 – Undo all four nuts securing the plunger mechanism to the RLV and remove the
complete assembly (B)
7.4.4 – Remove the orifice plate by undoing the four securing screws
7.4.5 – Each orifice plate is stamped with the associated flow rate, select a suitable plate and
install
7.4.6 – Re-fit the plunger assembly (Tip: Applying sufficient air to retract the plunger via the
fitting (A) on the plunger body will aid installation)
7.4.7 – Reconnect the tube disconnected in step 8.2
7.4.8 – Re-fit the rear access plate
ML501 v10
24-Aug-15
Page 16 of 20
8. Maintenance of the System
The maintenance recommended for the system consists of the following, supplemented by any
additional local requirements imposed by the local Code of Practice.
Expo recommends that the commissioning tests be repeated at every six to 24 months, dependent
on the environment. In addition the following checks are also recommended at that time:
• Check the RLV and any other Spark Arrestors. Remove any debris or corrosion, or replace with a
spare.
• Check the condition of the air supply filter element. Clean or replace it as necessary.
At least every two years, the following additional checks are recommended:
• Apparatus is suitable for the Hazardous Location
• There are no unauthorised modifications
• The source of air is uncontaminated
• The interlocks and alarms function correctly
• Approval labels are legible and undamaged
• Adequate spares are carried
• The action on pressure failure is correct
The Intrinsically Safe Battery Pack should be changed at least every three years, and the
commissioning tests repeated. After the timing phase has elapsed, the battery may be ‘hot-swapped’
in a hazardous environment without effecting the operation of the MiniPurge Ex px system
8.1 Recalibration of the Pressure Relief Valve (when necessary)
Before making any adjustment, make sure the pressure Relief Valve seat is
free of contamination, particles. To adjust the lift off pressure of the
overpressure Relief Valve you will require an 8mm wrench and a 2.5mm Hex
Key. While holding the central Hex Screw in position loosen the retaining nut.
Adjust the Hex key clockwise to increase the lift off pressure, adjust Anticlockwise to reduce the lift off pressure. "The adjustment is very sensitive and it
is recommended that one half turn between tests should be adequate until you
are familiar with the device". Retighten the locking nut while holding the
adjustment screw in position before each test.
8.2 Recalibration of the Pressure Sensors (when necessary)
The brass nozzle is sealed into position using Loctite thread
sealant. This may require heating slightly to soften prior to
making any adjustment to avoid damaging the soft brass
nozzle. The adjustment is very sensitive so only turn the
nozzle a few degrees until you have an idea of cause and
affect when calibrating. Clockwise reduces the pressure
setting.
Remove Sensor by
unscrewing anti-clockwise.
Brass Nozzle
ML501 v10
24-Aug-15
Page 17 of 20
9. Fault Finding
If the system does not behave in the manner described above there is a fault. Some of the more
likely faults are dealt with below. If a cure cannot be affected by following the procedure shown below
please call Expo (24 hour answering) or your supplier for further assistance.
The system has been designed for ease of fault finding and the many of the components fitted are
plug-in or chassis mounted. Check components by substitution only after establishing that such
action is necessary. If the system is less than 12 months old, parts under warranty should be
returned to Expo for investigation, with a full report of the fault and the system Serial Number.
As with any pneumatic system the greatest enemies are water, oil and dirt in the air supply. For this
reason the air system must always incorporate a dust and water filter to provide air to instrument
quality. This will protect not only the purge system but also the equipment being purged. The
filtration must be provided by others. However dirt can enter from other sources and it is vital
therefore that the procedures described in "Installation" section are carried out before using the
system for the first time, or following any disconnection of the pipe-work. Failure to perform this work
may cause damage that will not be covered under warranty.
Before making the following checks verify that both the main air supply pressure to the MiniPurge
system & the regulated pressure to the logic are as specified on the system specification sheet.
Also ensure that the air supply pressure does not drop during purge below the minimum supply
pressure. Most faults reported are due to insufficient air supply being maintained throughout the
duration of a purge cycle.
9.1 System Purges Correctly but the Alarm Comes ON at the End of Purge Time and the
Purging Cycle is Repeated.
Cause 1:
The CLAPS Regulator setting is too low and the PE is tripping out after purging due to low pressure.
Try increasing the setting of the CLAPS Leakage Compensation pilot pressure to raise the pressure
in the PE at the end of purging.
Cause 2: Enclosure fault?
• Is the ACTUAL PE pressure below the setting of the Minimum Pressure sensor? Check it with a
manometer or gauge.
• Is there any debris stuck on the face of the RLV disk, perhaps held there because of the magnet?
• Has the PE door / covers been closed and all conduit / cable glands sealed?
• Is the PE leaking too much?
• Is the pressure sensing tube damaged and leaking?
Cause 3: System fault?
If checks above reveal that the PE is correct, the fault probably lies in the CU. The basic operation
of the Minimum Pressure Sensor can be checked by unscrewing the 60mm diameter diaphragm
housing and sealing the 12mm threaded hole in the top of the valve module. This can be
accomplished by using a rubber block. The valve should operate and the indicator turns "Green". If
indicator turns "Green" it is likely that the pressure sensor diaphragm needs re-calibrating or
replacing.
9.2 Relief Valve Opens (Continuously or Intermittently)
Cause 1: The PE pressure is too high.
The CLAPS Leakage Compensation Pilot Pressure is too high. Adjust the CLAPS LC Pilot pressure.
ML501 v10
24-Aug-15
Page 18 of 20
Cause 2: Debris on the RLV disk allowing air to leak from the valve. Remove the RLV cover and
clean the valve disk.
9.3 "Purging" Indicator will not flash yellow during purging
Cause 1: Insufficient Purging Flow due to inadequate air supply pressure. Check the air supply
pressure at the inlet to the CU when purging is taking place. Excessive pressure drop in the supply
pipe is a very common cause of this problem. The pipe bore must be at least the same size of the
CU inlet fitting.
Cause 2: Excessive PE leakage. Check around the PE when purging is taking place. Any significant
leakage must be cured. Has a Leakage Test been done? The total leakage at the Purge Outlet Valve
should not exceed 10% of the Purge Flow Sensor setting. Check for leakage down the cables or
conduit.
Cause 3: The tubing from the RLV Flow Sensing point to the Purge Flow sensor is not air-tight e.g.
fitting nuts not tightened or tube damaged. Check and repair as necessary.
Cause 4: The Intrinsically Safe Battery Pack may be discharged and require replacement.
Cause 5: Ensure the ‘System Purging’ pneumatic OR switch output signal is present. If this is not the
cause the Electronic Timer circuit may be faulty. Due to the critical nature of this product we
recommend a new timer is fitted. This should be completed by a trained Service Engineer
9.4 System fails to operate when the Motor Interlock Switch closes after the Purge Time has
elapsed?
Cause 1: Is power available? Is the power isolator closed? Are the fuses or circuit breaker OK?
Cause 2: System fault? Timer not timed out?
• Has the "Purging" indicator been flashing “Yellow” for the whole of the purge time?
• Is the logic pressure gauge setting correct?
• The Timer setting may be reduced for test purposes down to 01 minutes. Check the operation on
the new purge time. If it works OK reset the time to the original setting. Finally recheck the purge
timer at its full setting.
10. Recommended Spares List
HF1-A03X-002
S0030/016*
HS3-2XX0-001*
S0191/025
S0191/026
Filter spare kit for HF1-A03X-001, 1.5” & 2” BSP port filters
Low Pressure, Intermediate Pressure & Purge flow sensors
CLAPS Control Sensor
E x d IIC T6 limit switch SPNO
E x d IIC T6 limit switch DPNO
*must be factory set to correct value that is stated on Customer System Test & Inspection sheet.
ML501 v10
24-Aug-15
Page 19 of 20
11. Recommended Tools List
Expo provided door key
Flat bladed screwdriver
8mm Wrench
2.5mm Hex key
12. Drawings and Diagrams
The following drawings are attached:
Title
MiniPurge D808 GA
Size 7 MotorPurge Relief Valve
D808 Circuit with KMP-1SP0-008
Drawing Number
D808-GA
XBR-RTD0-007
AGM-PA00-039
Sheet(s)
1 & 2 of 2
1 of 1
1 of 1
13. Certificates
Certificates can be found in the accompanying manual (ML497)
Purge System:
ATEX Certificate
IECEx Certificate
INMETRO
MIU/e Ex e Terminal Box:
ATEX Certificate
IECEx Certificate
INMETRO
Electric Swicthes:
Ex d limit switch
Ex d limit switch
Electronic Timer:
ATEX Certificate
IECEx Certificate
IECEx SIR07.0027X
SIRA 01ATEX1295X
TÜV 12.1462X
ITS 10ATEX37092X
IECEx ITS 10.0003X
TÜV 12.1463
IECEx PTB 07.0045X
PTB 00ATEX1093X + DoC No 01-2511-7C0001
FM 10 ATEX0003X
IECEx FME 10.0001X
ML501 v10
24-Aug-15
Page 20 of 20
DO NOT SCALE
DIMENSIONS IN mm
PURGE AIR
OUTLET
2" NPT
16/09/2013
5928
5929
5970
03
04
05
19/11/2013
17/09/2013
APPROVED DATE
MOD NUMBER
REV.
JPdB
JPdB
JPdB
SM
APP'D
DM
CHK'D
DRAWING STATUS:
APPROVED DRAWN DATE:
Nigel
WN
production
03/11/2011
LOW PRESSURE INDICATOR (RED/GREEN)
INTERNAL EX e JUNCTION
BOX WITH GLAND PLATE
FOR EXTERNAL ACCESS
(UNDRILLED)
750
=
=
710
=
=
INTERMEDIATE LOW PRESSURE INDICATOR (RED/GREEN)
1050
1090
=
=
NROB ON ALL EXTERNAL SURFACES
FINISH
=
=
=
=
PRIMARY (MOTOR) ENCLOSURE PRESSURE
1/8" NPT
FILTER DRAIN
1/8" NPT
8 OFF WALL MOUNTING
POINTS Ø14
1/4 TURN DOOR FASTENER
PURGE AIR INLET
2" NPT
6
JOB No:
TITLE
CUSTOMER:
D808MOTORSYS
1:10
REV:
05
SHEET No 1 OF 2
D808-GA
DRAWING No.
SCALE
CONTROL UNIT WEIGHT: 70KG
RELIEF VALVE WEIGHT: 23KG
MATERIALS:
SYSTEM HOUSING, Ex e JUNCTION
BOX AND FLANGES: STL ST 316.
BULKHEAD FITTINGS: STL ST 304/316.
SURREY TW16 5DB
262
150
OPEN PURGE OUTLET SIGNAL TO RELIEF VALVE 1/8" NPT
DP HIGH FROM RELIEF VALVE 1/8" NPT
DP LOW FROM RELIEF VALVE 1/8" NPT
MINIPURGE MUST BE MOUNTED IN
THE POSITION SHOWN.
NOTES:
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential
and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent
from Expo Technologies Limited, neither are they to be used in any way against our interests.
Expo Technologies Limited UNITED KINGDOM
PROTECTIVE
INDICATOR COVER
100
130
160
STAINLESS STEEL 316L
1.5mm THK
MATERIAL
1010
950
860
=
=
UNSPECIFIED
TOLERANCES
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
PURGE TIME INDICATOR (LED)
2 OFF LIFTING EYES
650
50
3rd ANGLE
PROJECTION
436
30
33
3rd ANGLE
PROJECTION
32
6
10
34
5
15
7
8
3
12
31
13
28
14
DR'WN
DR
CHK'D
DM
APP'D
JPdB
production
16
2
17
25
24
NROB ON ALL EXTERNAL SURFACES
FINISH
26
4
STAINLESS STEEL 316L
1.5mm THK
03/11/2011 MATERIAL
27
9
UNSPECIFIED
TOLERANCES
22
19
ELECTRONIC TIMER
ELECTRONIC TIMER BATTERY
31
32
33
JOB No:
CUSTOMER:
D808MOTORSYS
SURREY KT7 0RH
NTS
SHEET No.
2
OF
2
05
REV:
D808-GA
DRAWING No.
SCALE
34 PURGE IN PROGRESS/HIGH PRESSURE/SECONDARY LOW
PRESSURE SWITCH AC-15 250V 4A SPCO
OPTIONAL
Ex e TERMINAL BOX
PURGE IN PROGRESS INDICATOR, BLACK/YELLOW
30
LOGIC AIR SUPPLY GAUGE
CLAPS REGULATOR
29
LOGIC AIR SUPPLY REGULATOR
27
28
PURGE FLOW REGULATOR
PURGE FLOW GAUGE
24
26
HIGH PRESSURE SENSOR
23
25
PURGE OUTLET OPEN SIGNAL VALVE (2)
INTERMEDIATE LOW PRESSURE SENSOR
22
PURGE ISOLATION VALVE
CLAPS SENSOR
21
PURGE CHANGE OVER VALVE 2
19
20
PURGE OUTLET OPEN SIGNAL VALVE (1)
PURGE CHANGE OVER VALVE 1
16
18
LOW PRESSURE SENSOR
15
17
TIMER VALVE
INTERMEDIATE LOW PRESSURE SWITCH AC-15 250V 4A SPCO
14
PURGE FLOW SENSOR
PURGE COMPLETE VALVE
13
11
12
PURGE COMPLETE SWITCH AC-15 250V 4A DPCO
LOW PRESSURE SWITCH AC-15 250V 4A SPCO
10
LOW PRESSURE ALARM & TRIP INDICATOR, RED/GREEN
INTERMEDIATE LOW PRESSURE ALARM INDICATOR, RED/GREEN
7
9
INTERMEDIATE LOW PRESSURE SWITCH ACTUATOR
6
8
MAIN AIR SUPPLY GAUGE
VOLUME BOOSTER
5
Expo Technologies LimitedUNITED KINGDOM
18
23
20
21
29
3
10 BAR GAUGE
ISOLATING VALVE
SYSTEM REGULATOR
2
4
MAIN AIR SUPPLY FILTER
1
REF DESCRIPTION
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential
and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent
from Expo Technologies Limited, neither are they to be used in any way against our interests.
TITLE
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
DRAWING STATUS:
DRAWN DATE:
11
1
DO NOT SCALE
DIMENSIONS IN mm
MOD NUMBER
5047
5360
5877
REV.
04
05
06
12/07/2013
14/10/2011
23/09/2010
APPROVED DATE
JPdB
JPdB
JPdB
APPROVED
DR'WN
SB
CHK'D
PSC
JPdB
production
PURGE AIR
OUTLET
100mm 3.94in
55mm 2.17in
FINISH
10 FIXING POINTS
TO SUIT M8 (5/16")
CUSTOMER:
SIZE 7 MOTORPURGE RELIEF VALVE
JOB No:
TITLE
06
REV:
SHEET No.
1
OF
1
XBR-RTD0-007
DRAWING No.
1:5
=
= 510mm 20.08in
SCALE
=
= 474mm 18.66in
SURREY KT7 0RH
=
= 360mm 14.17in
MOUNTING DETAILS
300mm 11.81in
LIFTING EYES
Expo Technologies Limited UNITED KINGDOM
3 THE PART CODE IS ARV-2008-100
2 WEIGHT IS APPROX. 23kg (51lb)
1 THE RELIEF VALVE MUST BE
MOUNTED IN THE ATTITUDE SHOWN.
NOTES
DIFFERENTIAL
PRESSURE LO
1/8" NPT
MOTOR
ENCLOSURE
PRESSURE
TAPPING POINT
1/8" NPT (PLUGGED)
OPEN PURGE
OUTLET SIGNAL
1/8" NPT
DIFFERENTIAL
PRESSURE HI
1/8" NPT
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential
and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent
from Expo Technologies Limited, neither are they to be used in any way against our interests.
SPARK ARRESTOR MESH
MUST NOT BE OBSTRUCTED
NEOPRENE GASKET
3 THICK X 30 WIDE
(1/8" X 1-1/8")
APP'D
DRAWING STATUS:
DRAWN DATE:
540mm 21.26in
112mm 4.41in
2 OFF M12 LIFTING EYES
26/09/2007 MATERIAL
PURGE FLOW
OUTLET VALVE
ASSEMBLY c/w
ORIFICE PLATE
10 OFF MOUNTING
9.5 (3/8")
HOLES
MOTOR ENCLOSURE
RELIEF VALVE ASSEMBLY
DO NOT SCALE
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
50mm 1.97in
UNSPECIFIED
TOLERANCES
80mm 3.15in
DIMENSIONS IN mm
=
= 380mm 14.96in
3rd ANGLE
PROJECTION
=
= 344mm 13.54in
410mm 16.14in
292mm 11.48in
=
= 180mm 7.09in
DR'WN
CHK'D
APP'D
28
24
DRAWING STATUS:
APPROVED:
DATE:
MOD. No:
ISSUE:
2
5
17
PURGE OUTLET
OPEN SIGNAL
(1)
A&T
A/O
3
2
3
2
C
PLUGGED
PURGE
FLOW
SENSOR
12
PURGE
CHANGEOVER
VALVE 1
18
PURGE
ISOLATION
VALVE
20
FINISH
TIMER
SWITCH
32
31
ELECTRONIC
TIMER
OPTION KMP-ISP0-007
OPTION KMP-ISP0-006
3
7
15
HIGH PRESSURE ALARM CONTACTS
AC-IS 4A 250V Ex d IIC T6
ALARM
PRESSURIZED
PURGE IN PROGRESS CONTACTS
AC-IS 4A 250V Ex d IIC T6
ALARM
PRESSURIZED
PURGE COMPLETE CONTACTS
AC-IS 4A 250V Ex d IIC T6
10
INTERMEDIATE LOW PRESSURE
CONTACTS AC-IS 4A 250V Ex d
IIC T6
30
JOB No:
TITLE
CUSTOMER:
105
104
109
111
112
115
114
Ex e TERMINAL BOX
117
BROWN 116
GREY
BLACK
BROWN 113
GREY
BLACK
BROWN 110
BLACK
107
108
BLUE
GREY
BROWN 106
GREY
BLACK
LOW PRESSURE ALARM CONTACTS
AC-IS 4A 250V Ex d IIC T6
11
102
101
MOTOR
ENCLOSURE
PRESSURE
TAPPING POINT
(PLUGGED)
BROWN 103
GREY
BLACK
RELIEF VALVE
30 mbar
PURGE
EXHAUST
SPARK
ARRESTOR
ALARM
BY OTHERS
MOTOR
ENCLOSURE
PURGE
OUTLET
VALVE
QUICK
EXHAUST
VALVE
SHEET No.
DRAWING No.
SCALE
OF
MOTOR ENCLOSURE PRESSURE BULKHEAD
RELIEF
VALVE
ASSEMBLY
ENCLOSURE
PRESSURIZED
MOTOR
ENCLOSURE
PURGE INLET
PURGE OUTLET
VALVE OPEN
SIGNAL
D.P. LO
D.P. HI
The contents of this drawing / document are Copyright  Expo Technologies Limited. They are to be treated as confidential and are returnable
upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither
are they to be used in any way against our interests.
TW16 5DB
Expo Technologies Limited SURREY
UNITED KINGDOM
PURGE
COMPLETE
13
VALVE
'OR' GATE
2
PURGE OUTLET
22
OPEN SIGNAL (2)
t
3
PURGE
INDICATOR
YELLOW=PURGING
25
PURGE FLOW
REGULATOR
CLAPS REGULATOR
29
26
PURGE FLOW
GAUGE
TIMER
14
VALVE
MATERIAL
PRIMARY (MOTOR) ENCLOSURE PRESSURE
9
INTERMEDIATE
LOW PRESSURE
INTERMEDIATE INDICATOR
RED - ALARM
PRESSURE
GREEN SENSOR
23
PRESSURIZED
16
8
6
VOLUME
BOOSTER
PURGE
19 CHANGEOVER
VALVE 2
2
UNSPECIFIED NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
TOLERANCES
2 DEC PLACE ±0.1
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
LOW PRESSURE INDICATOR
RED - ALARM
GREEN - PRESSURIZED
CLAPS SENSOR
REGULATOR
MAIN AIR
SUPPLY
GAUGE
LOW
PRESSURE
SENSOR
21
3
MAIN AIR
SUPPLY
FILTER
GAUGE
HIGH
PRESSURE
SENSOR
4
ISOLATION
VALVE
1
MINIPURGE SYSTEM
ENCLOSURE
DO NOT SCALE
DIMENSIONS IN mm
NOTE:
1. FOR DETAILS OF BALLOONED ITEMS
SEE GENERAL ARRANGEMENT
DRAWING
LOGIC AIR
LOGIC AIR
SUPPLY
SUPPLY
REGULATOR GAUGE
2.1 bar
27
FILTER DRAIN
SUPPLY: 420 - 800 kPa
( 4.2 - 8 bar )
INSTRUMENT AIR
3rd ANGLE
PROJECTION
Address:
This equipment and any acceptable variation thereto is specified in the schedule to this certificate and
the documents therein referred to.
Sira Certification Service, notified body number 0518 in accordance with Article 9 of Directive 94/9/EC of 23
March 1994, certifies that this equipment has been found to comply with the Essential Health and Safety
Requirements relating to the design and construction of equipment intended for use in potentially explosive
atmospheres given in Annex II to the Directive.
7
8
29097
Form 9400 Issue 1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Project Number
II 2(2) GD
Ex [px] ia IIC T6 Gb
Ex [p] ia IIIC T95°C Db
(Ta –20oC to +55oC)
II 2(3) GD
Ex [pz Gc ] IIC T6 Gb
Ex [p Dc] IIIC T85°C Db
(Ta –20°C to +55°C)
Standard /ET versions
II 2(2) GD
Ex [px] IIC T6 Gb
Ex [py] IIC T6 Gb
Ex [p] IIIC T85°C Db
(Ta –20°C to +55°C)
Page 1 of 7
Sira 01ATEX1295X
Issue 8
Metal foam
Tortuous path with at least 4 x 90°or 2 x 180° bends
Multi-layer stainless steel mesh
Knitted mesh
Threaded Orifices e.g. ¼″ NPT or 2″ BSP with a built in spark arrester. These are selected to maintain a
desired back pressure within the Ex p protected apparatus when used with the Continuous Flow options.
The designation of each outlet orifice indicates the nominal inlet diameter. The designations are as
follows: SA3, SA6, SA9, SA12, SA19, SA25, SA32, SA38 and SA50.
Plain holes in the Relief Valve disk, sized according to the flow rate required.
Replaceable orifice type SAU**.
•
•
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Tel:
Fax:
Email:
Web:
Form 9400 Issue1
Page 2 of 7
Rake Lane, Eccleston, Chester, CH4 9JN, England
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Tel:
Fax:
Email:
Web:
Sira Certification Service
Pneumatically Operated Outlet Valve - The pneumatically operated outlet valve is used to
positively open or close the outlet of the purged enclosure by means of a spring return pneumatic
cylinder. Systems fitted with the Pneumatically Operated Outlet Valve will carry the option OV.
High Pressure Sensor for LC Systems (HP code) - If the pressure in the pressurized enclosure
rises above the setting of the High Pressure sensor, the purge gas flow is isolated from the pressurised
enclosure. The valve isolates both the leakage compensation and the purge streams. On detecting the
overpressure, an optional facility is available for the generation of an alarm or indicator. On systems
with a High Pressure sensor, the relief valve may be omitted.
High Pressure Sensor for CF Systems (HP code) - If the pressure in the pressurized enclosure
rises above the setting of the High Pressure sensor, the controller resets cutting the power to the
enclosure. On detecting the overpressure an optional facility is available for the generation of an alarm
or indicator. On systems with a High Pressure sensor, the relief valve may be omitted.
•
•
•
Outlet Orifice - Three types of orifice are used:
•
•
The outlet of each relief valve is fitted with a spark arrestor, of which there are four optional types:
RLV3, RLV6, RLV9, RLV12, RLV19, RLV25, RLV26, RLV52, RLV36, RLV75, RLV104, RLV125, RLV150 and
RLV200.
Relief Valve - The MiniPurge controller is supplied with an optional overpressure relief valve, which is to be
fitted to the Ex p protected apparatus to prevent an internal overpressure above the maximum overpressure
rating of the apparatus. There are 14 models of relief valve; the designation of each relief valve refers to its
nominal bore in mm, as follows:
The MiniPurge option pD is for use in combustible dust
The MiniPurge control unit may be supplied within a heated enclosure to permit the use of the system within
an ambient temperature down to –50oC.
LC-Leakage compensation only after initial high purge
CF-Continuous flow (same flow rate during and after purging)
CF2-Two flow CF system with initial high purge rate only at one orifice
CFHP-Continuous (lower) flow after initial high purge
The Purge Controllers are pneumatically operated devices, which are intended to provide a given flow rate of
purging gas for a predetermined time to unspecified Ex p protected electrical equipment. The MiniPurge
Control Units provide one of the following four methods of purge operation.
DESCRIPTION OF EQUIPMENT
This certificate and its schedules may only be
reproduced in its entirety and without change.
13
EC TYPE-EXAMINATION CERTIFICATE
SCHEDULE
CERTIFICATION
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
C Ellaby
Deputy Certification Manager
Ex [px] dem ia IIC T3 or T4 Gb
Ex [p] ia IIIC T200°C or T135°C Db
(Ta –50°C to +55°C)
Low temperature /ET versions
II 2(2) GD
II 2(2) GD
Ex [px] dem IIC T3 or T4 Gb
Ex [p] IIIC T200°C or T135°C Db
(Ta –50°C to +55°C)
Low temperature versions
The marking of the equipment shall include the following:
12
Standard versions
This EC type-examination certificate relates only to the design and construction of the specified equipment. If
applicable, further requirements of this Directive apply to the manufacture and supply of this equipment.
EN 61241-4: 2006
11
EN 60079-2:2007
If the sign ‘X’ is placed after the certificate number, it indicates that the equipment is subject to special
conditions for safe use specified in the schedule to this certificate.
IEC 60079-0:2011
Compliance with the Essential Health and Safety Requirements, with the exception of those listed in the
schedule to this certificate, has been assured by compliance with the following documents:
The examination and test results are recorded in the confidential reports listed in Section 14.2.
Unit 2, The Summit, Hanworth Road, Sunbury on Thames, Surrey TW16 5DB UK
EXPO Technologies Limited
10
9
Applicant:
8
6
Issue:
5
Sira 01ATEX1295X
Purge Controllers: Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Certificate Number:
Equipment:
3
Equipment intended for use in Potentially Explosive Atmospheres Directive 94/9/EC
2
4
EC TYPE-EXAMINATION CERTIFICATE
1
CERTIFICATION
Form 9400 Issue1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Page 3 of 7
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Model Number Designation for ATEX approved MiniPurge systems
a
Size or Capacity
Model Number:
1
Sub-MiniPurge
2
MiniPurge
1 X LC cs DS SS AA MO FM OA TW
3
Super-MiniPurge
Key:
4
Super-MiniPurge 1800
a b cc mm Example option codes
5
Super-MiniPurge 3500
6
Super-MiniPurge 7000
7
Super-MiniPurge xxxx
b
Pressurization Type
X
X Pressurization
Y
Y Pressurization
Z
Z Pressurization
cc
Action after initial purging
LC
Leakage Compensation only after initial High Purge
CF
Continuous Flow (same flow rate during and after purging)
CF2
Two Flow CF system with initial High Purge rate but only one orifice
CFHP
Continuous (lower) Flow after initial High Purge
DP
Dust Protection (pressurization only)
mm
Material of the Control Unit Enclosure
al
Aluminium alloy
cs
Mild steel, painted
ss
Stainless steel
bp
Back Plate only
co
Chassis only
pm
Panel mounting
nm
Non-Metallic
Option codes (Added only if used)
AA
Active Alarm output fitted.
AC
Alarm cancellation circuit.
AO
"Alarm Only" Action on Pressure or Flow Failure.
AS
Alarm "Action on Pressure or Flow failure", Selector valve.
CS
Containment System Monitor.
DS
Door switch Power Interlock fitted.
DT
Delayed Trip after Pressure or Flow failure.
DXXX
Special design for specific flow rates
ET
Electronic Timer
FM
Flow Meter(s) fitted.
HP
System LC or CF with High Pressure Sensor
IS
Internal Switches suitable for Ex i circuits.
MO
Manual Override fitted.
MT
Mechanical Timer.
OA
On/Off switch controlling Protective gas and logic supply.
OB
On/Off switch controlling logic supply only.
OC
On/Off switch controlling Protective gas supply only.
OS
Outlet (Orifice) Selector valve.
OV
Outlet valve, pneumatically operated.
PA
"Ex" switch(es) built-in, with/without "Ex" junction box.
PC
PE Pressure Control Leakage Compensation Valve (CLAPS System.)
PO
Pneumatic Output signals for Power and Alarm control.
SP
Secondary Pressurization supply options.
SS
Separate Supply for Protective gas and Logic air.
TW
Twin (or more) outputs for two or more separate pressurized enclosures purged in parallel
Old Name:
Expo Telektron Safety System Limited
New name:
Expo Technologies Limited
A change of the Applicant’s name on the certificate and the substitution of the new name for the
old name on the approved label affixed to the purge controllers:
Any suitably ATEX, Category 2 approved cable gland may be used, if it can be used with the
ambient temperature range.
An Ex e terminal box is provided within the main enclosure for connection of the heater leads. This
polyester box is manufactured by Bartec and coded Ex e II T6 under BAS 98ATEX3008X. Other
alternative ATEX terminal boxes may be used as a replacement if they are suitably certified, carry
the same or greater ambient temperature range, occupy the same or smaller physical space, have
the same certification code and have the same Temperature Class.
RTDs are fitted to the air inlet pipe-work and inside the purge controller enclosure.
The enclosure is made from 1.5mm or 2.5 mm thick stainless or mild steel painted and the lid is
made from 1.5 mm thick stainless steel, lined with 38 mm thick insulation, or other materials with
equivalent insulating properties. The purge inlet, purge outlet and pressure sensing lines are
similarly insulated. The door may optionally be hinged with quick release catches, these will be
fitted with a padlock. An enclosure breather tube is fitted to help prevent condensation. A plastic
clear viewing window may optionally be fitted to the door.
The heater (500 W maximum) is manufactured by Intertec-Hess GmbH and coded Ex d m IIC T3
(max) under PTB 02ATEX1041X. If the outer enclosure is reduced in size the power of the heater
may be reduced in proportion to the reduction in surface area. Other alternative heaters may be
used as a replacement if they are suitably certified, carry the same or greater ambient
temperature range, occupy the same or smaller physical space, have the same certification code
and have the same or more restrictive Temperature Class.
Form 9400 Issue1
II 2(2) G D
Page 4 of 7
The ATEX coding is modified to:
[Ex pD] II T200°C 21 (Ta = -20°C to +55°C) [Ex pD] II T85°C 21 (Ta = -20°C to +55°C) -
Tel:
Fax:
Email:
Web:
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www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
(used with the low temperature versions)
(used with the standard temperature versions)
To permit the pressurisation of enclosures for the exclusion of combustible dusts in accordance
with IEC61241-4:2001 and modification of the marking to include one of the following:
This certificate and its schedules may only be
reproduced in its entirety and without change.
i.
Sira 01ATEX1295X
Issue 8
CERTIFICATION
The purge controller to be fitted inside an additional, heated, stainless steel enclosure that allows
it to be used down to -50oC.
Variation 2 This variation introduced the following change:
ii.
i.
Variation 1 This variation introduced the following changes:
EC TYPE-EXAMINATION CERTIFICATE
EC TYPE-EXAMINATION CERTIFICATE
Sira 01ATEX1295X
Issue 8
SCHEDULE
SCHEDULE
CERTIFICATION
Following appropriate re-assessment to demonstrate compliance with the requirements of the EN
60079 series of standards, the documents originally listed in section 9, EN 50014:1997
(amendments A1 to A2) and EN 50016:1995, were replaced by EN 60079-0:2006, EN 60079-1:2004,
EN 61241-0:2006 and EN 61241-1:2006, the markings in section 12 were updated accordingly.
The removal of special conditions for safe use that were not specifically associated with the
equipment covered by this certificate.
To permit the inclusion of the following coding for the Low Temperature MiniPurge Enclosure:
Ex [p] dem IIC T4
Ex pD II 21 T135°C
(Ta –50oC to +55oC)
The introduction of the /ET version, an alternative to the pneumatic or mechanical timer system,
this incorporates an Electronic Timer Module ETM-IS**-*** in the Mini Purge, the certification
includes ‘ia’ marking when the ETM is fitted.
The dust marking was changed to be consistent with the marking for gases and vapours.
The introduction of a high pressure sensor for the LC option.
Following appropriate re-assessment to demonstrate compliance with the requirements of the
latest EN 60079 series of standards, the documents previously listed in section 9, EN 60079-0:
2006 and EN 60079-2: 2004 were replaced by those currently listed (EN 61241-0: 2006 was
removed as this is incorporated into the current version of 60079-0), the markings in section 12
were updated accordingly and a new condition of certification was added.
Date
3 July 2002
29 March 2004
30 September 2004
19 September 2006
Form 9400 Issue1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Issue
0
1
2
3
Page 5 of 7
Report no.
R53A7169A
R53V11342A
R51A11080A
R51A15629A
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Comment
The release of prime certificate.
The introduction of Variation 1.
The introduction of Variation 2.
The re-issue of Variation 2 to include the changes
described in report number R51A15629A.
Associated Sira Reports and Certificate History
Refer to Certificate Annexe.
Drawings
14.2
DESCRIPTIVE DOCUMENTS
14.1
The recognition of the Applicant’s address change from Summer Road, Thames Ditton, Surrey KT7
0RH to Unit 2, The Summit, Hanworth Road, Sunbury on Thames, Surrey TW16 5DB.
14
i.
Variation 7 - This variation introduced the following changes:
i.
Variation 6 - This variation introduced the following changes:
ii.
iii.
i.
Variation 5 - This variation introduced the following changes:
i.
Variation 4 - This variation introduced the following changes:
ii.
i.
Variation 3 This variation introduced the following changes:
This MiniPurge Control Unit shall be incorporated into equipment and the appropriate Conformity
Assessment Procedures applied to the combination as defined by Directive 94/9/EC. This certificate
does not cover the combination.
15.4
Form 9400 Issue1
Page 6 of 7
Holders of Type Examination Certificates are required to comply with the production control
requirements defined in Article 8 of directive 94/9/EC.
17.2
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
The use of this certificate is subject to the Regulations Applicable to Holders of Sira Certificates.
17.1
This certificate and its schedules may only be
reproduced in its entirety and without change.
CONDITIONS OF CERTIFICATION
17
The relevant EHSRs that are not addressed by the standards listed in this certificate have been
identified and individually assessed reports listed in Section 14.2.
ESSENTIAL HEALTH AND SAFETY REQUIREMENTS (EHSRs)
The values of the safety parameters shall be set in accordance with the equipment certificate that
covers the combination of the pressurised enclosure(s) and MiniPurge Control Unit.
15.3
16
The installer/user shall ensure that the MiniPurge Control Unit is installed in accordance with the
equipment certificate that covers the combination of the pressurised enclosure(s) and MiniPurge
Control Unit.
15.2
The purge controller, low temperature version, shall be protected by a safety related system that
ensures that it cannot be energised if the temperature of the air inlet or purge controller falls below 20oC. This system shall utilise the RTDs that are fitted to the purge controller to provide the
appropriate level of system integrity, i.e. a level of operational safety of Cat 3 according to EN 954-1 for
ATEX Category 2 (Zone 1) applications; note that these RTDs have not been assessed as a safety
related device in accordance with EHSR 1.5 of Directive 94/9/EC.
When using the AO, AS and DT options, the recommendations for the additional requirements of Ex p
apparatus contained within EN 60079-14 shall be applied.
15.5
SPECIAL CONDITIONS FOR SAFE USE (denoted by X after the certificate number)
R25983A/00
R29097A/00
Comment
This Issue covers the following changes:
• All previously issued certification was rationalised
into a single certificate, Issue 4, Issues 0 to 3
referenced above are only intended to reflect the
history of the previous certification and have not
been issued as documents in this format.
• The introduction of Variation 3.
The introduction of Variation 4.
This Issue covers the following changes:
• This certificate history was modified to recognise
that that Variation 2 was re-issued, subsequent
Variations have therefore been re-numbered.
• The introduction of Variation 5.
The introduction of Variation 6.
The introduction of Variation 7.
15
07 December 2011
05 October 2012
7
8
R51L19695A
R23665A/00
Report no.
R51L15966B
Sira 01ATEX1295X
Issue 8
CERTIFICATION
15.1
18 February 2009
22 December 2010
Date
7 June 2007
5
6
Issue
4
EC TYPE-EXAMINATION CERTIFICATE
EC TYPE-EXAMINATION CERTIFICATE
Sira 01ATEX1295X
Issue 8
SCHEDULE
SCHEDULE
CERTIFICATION
The following routine tests shall be performed by the manufacturer:
17.4
Form 9400 Issue1
Page 7 of 7
The Purge Controllers: Sub-MiniPurge, MiniPurge, Super-MiniPurge, Super-MiniPurge
1800/3500/7000/7000X shall not be marked as suitable for use in explosive dust atmospheres when a
non-metallic or painted housing is used.
17.7
Tel:
Fax:
Email:
Web:
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+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
The certification code that is appropriate to Purge Controllers low temperature version shall appear in
the product marking applied to outer stainless steel enclosure.
17.6
This certificate and its schedules may only be
reproduced in its entirety and without change.
The products covered by this certificate incorporate previously certified devices, it is therefore the
responsibility of the manufacturer to continually monitor the status of the certification associated with
these devices, and the manufacturer shall inform Sira of any modifications of the devices that may
impinge upon the explosion safety design of the products.
17.5
Where the HP is specified an overpressure shall be simulated whilst the MiniPurge Control Unit is
cycling, it shall be verified that the controller provides the appropriate output and resets.
Verification of Purging Overpressure protection
An air supply failure shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified
that the controller provides the appropriate output and resets.
Verification of Air Supply Failure Protection
A purge failure shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified that
the controller provides the appropriate output and resets.
Verification of Purge Failure Protection
An overpressure loss shall be simulated whilst the MiniPurge Control Unit is cycling, it shall be verified
that the controller provides the appropriate output and resets.
Verification of Minimum Overpressure Cut Off
The switches incorporated in the PA option shall be suitably certified for Category 2.
Sira 01ATEX1295X
Issue 8
17.3
EC TYPE-EXAMINATION CERTIFICATE
SCHEDULE
CERTIFICATION
EXPO Technologies Limited
Equipment:
Applicant:
Sheet
1 to 4
1 to 2
1 of 1
1 of 1
1 of 1
Rev.
3
2
1
1
1
Date
02 Jul 02
21 May 01
21 Sep 00
21 Sep 00
21 Sep 00
Sheet
1 of 1
Rev.
3
Date
Description
22 March 04 Low Temperature Housing - General Arrangement
Description
Certification label
Low temperature housing wiring certification drawing.
Sheet
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 to 2
1 to 2
Sheet
1 to 5
Rev.
02
03
02
02
02
02
02
03
03
02
02
02
02
01
01
01
01
02
01
04
06
03
Rev.
5
Date
15 Mar 07
09 Jul 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
18 Apr 07
27 Mar 07
15 Mar 07
25 Apr 07
15 Mar 07
20 Feb 07
20 Feb 07
Date
30 Aug 06
Form 9400 Issue 1
This certificate and its schedules may only be
reproduced in its entirety and without change.
Number
EP99-3-1
EP99-2-1
EP99-2-3
EP99-2-2
EP99-2-7
EP99-2-8
EP99-2-9
EP99-2-10
EP99-2-11
EP99-2-12
EP99-2-14
EP99-2-17
EP99-2-16
SD7533
SD7535
SD7536
SD7538
SD7449
SD7500
SD7448
SD7281
SD7282
Issue 4
Number
SD7281
Page 1 of 2
Tel:
Fax:
Email:
Web:
+44 (0) 1244 670900
+44 (0) 1244 681330
info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Description
Minipurge Control Unit – General Assembly
Schematic - Type x Leakage Compensation
Sequence Diagram - Type x Leakage Compensation
Schematic - Type x Continuous Flow
Schematic – Separate Supply and Mechanical Timer
Schematic – Delay Before Trip and On/Off
Schematic – Twin Output and Manual Override
Schematic – Pressure Control Leakage Compensation
Internal “IS” Switches
Schematic – Containment System and Secondary pressurisation
Schematic – Continuous Flow with 2 Flow Rates
Schematic – Continuous Flow with High Pressure
Schematic – Outlet Valve Control
Schematic – Dust Protection
Spark Arrestor
Differential Flow Monitor
Continuous Flow Outlet Orifice
Wiring Diagram – Low temperature
Outlet Orifice Closing Device
Low Temperature Housing
Certification Label Details
MiniPurge Data Sheet
Description
Certification label
Issue 3 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
Sheet
Rev.
Date
SD7281*
1 to 5
4
17 Dec 03
SD7449
1 of 1
1
18 Dec 03
* Modified by Sira 30 September 2004
Issue 2 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
SD7448
CERTIFICATION
Description
MiniPurge ATEX Certification Labelling
MiniPurge ATEX Certification Type Numbering Scheme
MiniPurge, Continuous Flow with /HP Sensor –Schematic diagram
RLV, outlet orifice
Outlet Valve Control Circuit Diagram
Issue 1 (The drawings associated with this issue were replaced by those listed in Issue 4)
Number
SD7281
SD7282
EP/99-2-17
EP99-7-7
EP99-7-9
Issue 0 (The drawings associated with this issue were replaced by those listed in Issue 4)
Sira 01ATEX1295X
Purge Controllers
Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Certificate Number:
Certificate Annexe
Sheets
1 to 3
Sheets
1 of 1
1&2
1 to 3
1 of 1
Sheets
1 to 2
1 to 2
1 of 1
1 of 1
Sheets
1 to 2
1 of 1
Rev.
10
Rev.
6
5
9
2
Rev.
8
4
2
2
Rev.
7
05
Form 9400 Issue 1
CERTIFICATION
Date (Sira stamp)
05 Oct 12
Date (Sira stamp)
23 Nov 11
23 Nov 11
23 Nov 11
23 Nov 11
Date (Sira stamp)
23 Dec 10
21 Dec 10
21 Dec 10
21 Dec 10
Page 2 of 2
Tel:
Fax:
Email:
Web:
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info@siracertification.com
www.siracertification.com
Rake Lane, Eccleston, Chester, CH4 9JN, England
Sira Certification Service
Title
Minipurge Certification Label
Description
Minipurge Low Temperature Housing
Minipurge Data Sheets
Minipurge ATEX/IECEx Certification Label
Minipurge Dust Protection Schematic
Description
Minipurge ATEX/IECEx Certification Label
MiniPurge Data Sheet
MiniPurge electronic timer
MiniPurge HP sensor
Description
Minipurge ATEX/IECEx Certification Label
Minipurge Low temperature Housing
Description
Fault Evaluation
Outlet Valve Circuit N/O
Outlet Control Valve N/C
Schematic – Type Z or Y leakage compensation
Schematic Type Z or Y Continuous Flow
Sequence Diagram – Type X Continuous Flow
Schematic – Alarm only and Alarm Action Selector
Schematic – Door Switch Active Alarm and Alarm Cancel
RLV Configurations
Alternative Z&Y LC System
Alternative Z&Y LC System
Date (Sira stamp)
12 Feb 09
12 Feb 09
Date
20 Feb 07
15 Mar 07
15 Mar 07
09 Jul 07
15 Mar 07
15 Mar 07
15 Mar 07
15 Mar 07
05 Jul 07
09 Jul 07
09 Jul 07
This certificate and its schedules may only be
reproduced in its entirety and without change.
Number
SD7281
Issue 8
Number
SD7448
SD7282
SD7281
SD7533
Issue 7
Number
SD7281
SD7282
SD7913
SD7914
Issue 6
Number
SD7281
SD7448
Issue 5
Rev.
01
02
01
02
01
02
02
02
01
01
01
EXPO Technologies Limited
Applicant:
Sheet
1 to 3
1 of 2
2 of 2
1 of 1
1 of 1
1 of 1
1 of 1
1 of 1
1 to 4
1 of 2
2 of 2
Purge Controllers
Sub-MiniPurge, MiniPurge, Super-MiniPurge,
Super-MiniPurge 1800/3500/7000/7000X
Equipment:
Number
SD7537
EP99-7-9
EP99-7-9
SD7531
SD7532
EP99-2-4
EP99-2-5
EP99-2-6
SD7555
SD7556
SD7556
Sira 01ATEX1295X
Certificate Number:
Certificate Annexe
MiniPurge Interface Unit MIU/e
User Instruction Manual
Manufacturer:
Model Type & Rating:
Certificates:
Hazardous Area Marking
Code:
Expo Technologies Ltd, Unit 2 The Summit, Sunbury on Thames. UK.
MIU/e1
MIU/e2
MIU/e1/MO
400V / 7A
400V / 7A
400 V / 2A
IECEx ITS10.0003X
Ex e IIC T5 Gb
Ex tb IIIC T100°C Db IP66
Tamb -20°C to +55°C
Ex e IIC T4 Gb
Tamb -20ºC to +60ºC
ITS 10ATEX37092X
II 2 G D
Ex e IIC T5 Gb
Ex tb IIIC T100°C Db IP66
Tamb -20°C to +55°C
II 2 G D
Ex e IIC T4 Gb
Tamb -20°C to +60°C
TUV 12.1463
Ex e IIC T5 Gb
Ex tb IIIC T100º Db IP66
Tamb -20°C to +55°C
APPLICATION SUITABILITY
The MiniPurge Interface Units – MIU/e are certified for use in Hazardous Areas where the Hazardous Area is non-mining
(i.e. above ground) and the hazard is caused by flammable gasses or vapours.
The systems may be used in ATEX/IECEx Gas Zones 1 & 2, Gas Groups IIA, IIB & IIC and in Dust Zones 21 & 22, Dust
Groups IIIA, IIIB & IIIC.
The following materials are used in the construction of MIU/e: Stainless Steel, Steel, Brass, Copper, Polyamide, Silicone.
If substances that will adversely affect any of these materials are present in the surrounding environment, please consult
Expo Technologies for further guidance. This equipment is designed for use under normal industrial conditions of ambient
temperature, humidity and vibration. Please consult Expo Technologies before installing this equipment in conditions that
may cause stresses beyond normal industrial conditions.
WARNING - Only install, commission, inspect, maintain or fault find when safe to do so.
INSTALLATION
The MIU/e shall be installed in accordance with relevant standards, such as EN 60079-14 and any local codes of practice
that are in force. Cable glands or other cable entry devices shall be appropriately certified and suitable for the cable and
the conditions of use and be installed in accordance with the manufacturer’s instructions.
The MIU/e shall be connected to the Purge and Pressurization system in accordance with the instructions given in the
handbook supplied with the pressurization system.
The external earth connection of the MIU/e shall be connected to earth using minimum 4mm2 conductor.
TERMINALS
MIU/e may be fitted with a combination of:
WDU2.5 terminals certified to KEMA 98ATEX1683U & IECEx ULD05.0008U
SAK2.5 terminals certified to KEMA 98ATEX1798U & IECEx KEM06.0014U
WPE2.5 Earth terminals certified to KEMA 98ATEX1683U & IECEx ULD05.0008U
For all type of terminals:
Tightening torque range: 0.4 to 0.8 Nm (WDU & WPE) & 0.4 to 0.6 Nm (SAK)
Conductor cross section maximum 2.5 mm2, minimum 1.5 mm2
Type of connection is screwed - Solid copper conductors to be used.
Stripping length shall be 10 mm.
Only one conductor is allowed at each side of a terminal. Multiple conductors shall be crimped together before screwed
into the terminal.
Maximum number of terminals:
For Model MIU/e1 – Up to 18 current carrying terminals
For Model MIU/e2 – Up to 33 current carrying terminals
For Model MIU/e1/MO – Up to 13 current carrying terminals
COMMISSIONING
The installation of the cable glands, electrical and earth connections shall be inspected for correct installation before the
unit is put into service. The lid shall be correctly fitted.
MAINTENANCE
The condition of enclosure and associated cable glands shall be inspected for damage every six months. The terminals
shall be inspected for tightness and gaskets inspected for damage.
FAULT FINDING
When wiring or signal fault occurs, check each terminated wire, terminals for tightness and gaskets for damage.
External faults such as broken switches within the Control Unit may also require investigation.
ML358 v6
Page 1 of 1
21-Mar-14
Downloaded from:
http://iecex.iec.ch/iecex/iecexweb.nsf/certificatesAjax/IECEx20PTB2007.0045X
The page at http://iecex.iec.ch says: 1. Certificates shown on this site are not required to be
signed by the issuing Certifying Body because Certificates availability here is evidence of the
Certifying Body's approval.
Address of Applicant:
Unit 2, The Summit
Hanworth Road
Sunbury on Thames
TW16 5DB
This equipment or protective system and any acceptable variation thereto is specified in the schedule to this
certificate and documents therein referred to.
FM Approvals Ltd, notified body number 1725 in accordance with Article 9 of Directive 94/9/EC of 23 March
1994, certifies that this equipment has been found to comply with the Essential Health and Safety Requirements
relating to the design and construction of equipment intended for use in potentially explosive atmospheres given
in Annex II to the Directive.
6
8
This EC-Type Examination certificate relates only to the design, examination and tests of the specified
equipment or protective system in accordance to the directive 94/9/EC. Further requirements of the Directive
apply to the manufacturing process and supply of this equipment or protective system. These are not covered by
this certificate.
The marking of the equipment or protective system shall include:
11
12
F ATEX 020 (May/12)
Page 2 of 3
THIS CERTIFICATE MAY ONLY BE REPRODUCED IN ITS ENTIRETY AND WITHOUT CHANGE
This Certificate has been issued in accordance with FM Approvals Ltd’s ATEX Certification Scheme.
Whilst this certificate may be used in support of a manufacturer’s claim for CE Marking, FM Approvals Ltd
accepts no responsibility for the compliance of the equipment against all applicable Directives in all
applications.
This EC-Type Examination Certificate is the result of testing of a sample of the product submitted, in
accordance with the provisions of the relevant specific standard(s), and assessment of supporting
documentation. It does not imply an assessment of the whole production.
Test and Assessment Procedure and Conditions:
The relevant EHSRs that have not been addressed by the standards listed in this certificate have been identified
and assessed in the confidential report identified in item 8.
F ATEX 020 (May/12)
Page 1 of 3
The Electronic Timer shall not be used where UV light or radiation may impinge the Electronic Timer
System.
The Electronic Timer shall be installed within an enclosure which provides protection against impact.
The Enclosure shall be metallic providing a minimum IP20.
For light alloy enclosures, materials shall not contain, by mass, more than 7.5% in total of magnesium,
titanium and zirconium. Where more than 10% in total of aluminium, magnesium, titanium and zirconium
the user shall take special precautions to avoid ignition hazard due to impact or friction.
Essential Health and Safety Requirements:
2.
3.
4.
1.
Special Conditions for Safe Use:
The input parameters for the power supply option are;
Ui = 11.1V
Ii = 340 mA
Pi = 2.613 W (non linear)
The Timer module and Solenoid Valve are designed to be installed within another enclosure.
Electronic Timer Module ETM-ISab-cde
a = sub module
1 = Timer Module powered by Expo Battery Pack
2 = Timer module powered by IS power supply
3 = Expo IS Battery Pack
4 = Expo IS remote Battery Pack
b = Mounting Style
1 = Plate mounted
2 = Panel mounted
c = LED connection
1 = LED’s on Timer surface
2 = LED’s on flying leads
de = Maximum Time
d = Reference Value 1 to 9
e = Multiplying digit 1, 2, 3 or 4
The ETM-IS is a powered electronic timer module. The Timer module is designed to be supplied from
either a self contained battery pack or an IS certified Power Supply. The battery pack contains a nonrechargeable battery together with current limiting resistors. The timer settings are controlled by two
BCD switches located on the main part of the timer. Connections from the timer to a solenoid valve and
switch are also provided. The solenoid is supplied as part of the timer circuit. Four LED’s are used to
indicate the status of the timer circuit.
Description of Equipment or Protective System:
FM Approvals Ltd. 1 Windsor Dials, Windsor, Berkshire, UK. SL4 1RS
T: +44 (0) 1753 750 000 F: +44 (0) 1753 868 700 E-mail: atex@fmapprovals.com www.fmapprovals.com
16
15
14
13
to EC-Type Examination Certificate No. FM10ATEX0003X
SCHEDULE
FM Approvals Ltd. 1 Windsor Dials, Windsor, Berkshire, UK. SL4 1RS
T: +44 (0) 1753 750 000 F: +44 (0) 1753 868 700 E-mail: atex@fmapprovals.com www.fmapprovals.com
THIS CERTIFICATE MAY ONLY BE REPRODUCED IN ITS ENTIRETY AND WITHOUT CHANGE
Issue Date: 22nd October 2013
Mick Gower
Certification Manager, FM Approvals Ltd.
Mick Gower
cn=Mick Gower, o=FM Approvals, ou,
email=mick.gower@fmapprovals.com,
c=GB
2013.10.22 13:09:43 +01'00'
II 1 G Ex ia IIC T6
II 1 D Ex iaD 20 T95°C
Ta = -20°C to +60°C
If the sign ‘X’ is placed after the certificate number, it indicates that the equipment is subject to special
conditions for safe use specified in the schedule to this certificate.
EN60079-0:2006, EN 60079-11:2007, EN 61241-0:2006 and EN 61241-11:2006
Compliance with the Essential Health and Safety Requirements, with the exception of those identified in item 15
of the schedule to this certificate, has been assessed by compliance with the following documents:
3036907EC dated 12th November 2010
The examination and test results are recorded in confidential report number:
Expo Technologies Ltd
10
9
7
Name of Applicant:
5
Electronic Timer Module ETM-IS**-***
Equipment or protective system:
(Type Reference and Name)
4
FM10ATEX0003X
EC-Type Examination Certificate No:
Explosive Atmospheres - Directive 94/9/EC
Equipment or Protective systems intended for use in Potentially
EC-TYPE EXAMINATION CERTIFICATE
3
2
1
F ATEX 020 (May/12)
Page 3 of 3
THIS CERTIFICATE MAY ONLY BE REPRODUCED IN ITS ENTIRETY AND WITHOUT CHANGE
22nd October 2013
30th January 2013
Original Issue.
12th November 2010
Supplement 1:
Report Reference: 3036906rev130109 dated 25th January 2013.
Description of the Change:
1.
Change of address
2.
Addition of IS power Supply option.
Supplement 2:
Report Reference: 3049400 dated 18th October 2013
Description of the Change: Addition of ETM-IS31-001 battery pack module. (This
corresponds to a =3. No change to the model code.)
Description
Date
Details of the supplements to this certificate are described below:
Certificate History
A list of the significant parts of the technical documentation is annexed to this certificate and a copy has
been kept by the Notified Body.
Schedule Drawings
FM Approvals Ltd. 1 Windsor Dials, Windsor, Berkshire, UK. SL4 1RS
T: +44 (0) 1753 750 000 F: +44 (0) 1753 868 700 E-mail: atex@fmapprovals.com www.fmapprovals.com
18
17
to EC-Type Examination Certificate No. FM10ATEX0003X
SCHEDULE
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6
With
European
Directives
EC-Declaration of
Conformity
Expo Technologies Ltd
Unit 2, The Summit, Hanworth Road
Sunbury on Thames TW16 5DB, UK
This is to declare that
Purge Controllers Type “MiniPurge”
are manufactured in conformity with the following
European Directives and standards:
Electromagnetic Compatibility Directive 2004/108/EG
MiniPurge Systems with a /PO suffix in the type number are non-electrical and are outside the scope
of the EMC Directive.
MiniPurge Systems with suffices /PA or /IS incorporate one or more volt-free (“dry”) contacts which
work in circuits specified by others. In normal operation these circuits are “benign” and no CE mark is
appropriate.
MiniPurge Systems with Electronic Timer (Option /ET) are designed to conform to the EMC Directive,
in compliance with EN 61000-6-4:2007 and EN 61000-6-2:2005 (Intertek Report EM10048000).
Low Voltage Directive 2006/95/EC
MiniPurge Systems are intended for use in potentially explosive atmospheres (Hazardous Areas) and
are therefore excluded from the Low Voltage Directive.
Pressure Equipment Directive 97/23/EC
MiniPurge Systems are classified as not higher than category I under Article 9 of this Directive and
intended for use in potentially explosive atmospheres (Hazardous Areas) and are therefore excluded
from the Pressure Equipment Directive.
ATEX Directive 94/9/EC
MiniPurge Systems are designed to conform to the ATEX Directive, in compliance with:
EN 60079-0 : 2012 + A11:2013
EN 60079-2 : 2007
EN 61241-4 : 2006
MiniPurge Systems are certified by SIRA Certification Service, Rake Lane, Eccleston, Chester CH4 9JN,
England, under EC Type-Examination Certificate SIRA 01ATEX1295X, in compliance with:
IEC 60079-0 : 2011
EN 60079-2 : 2007
EN 61241-4 : 2006
According to the model, MiniPurge Systems are rated and shall be marked as follows:
MiniPurge, X & Y models
MiniPurge, Z models
Group II Category 2G & 2G
Group II Category 3G & 3D
II 2(2) GD
II 2(3) GD
MiniPurge systems are manufactured under Production Quality Assurance Notification
SIRA 99 ATEX M043, issued by SIRA Certification Service, Notified Body No 0518.
John Paul de Beer
Managing Director
S:\Files\QA\CERTS\C-OF-C\Minipurge CE SC004 Issue6.doc
Date 02/09/2014
Confidential Assessment file reference SC004
Expo Technologies Ltd.
Unit 2, The Summit
Hanworth Road
Sunbury on Thames
TW16 5DB
Tel
Fax
E-mail:
+ 44 (0) 20 8398 8011
+ 44 (0) 20 8398 8014
sales@expoworldwide.com
Expo Technologies Inc.
9140 Ravenna Road Unit #3
Twinsburg
OH 44087
USA
Tel:
Tel:
Fax:
E-mail:
+1 888-NFPA-496
+1 (440) 247 5314
+1 (330) 487 0611
sales.na@expoworldwide.com
www.expoworldwide.com
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