Meech A70025EX Manuel utilisateur
1
EX Cabinet Cooler
Operating
Manual
3
Products shown in this document may be covered by one or more patents, patents applied for
and/or registered designs and/or trade marks. For further information please refer to our Head
Ofce or visit www.meech.com.
© Meech Static Eliminators Ltd.
Contents
Section Page
1. Introduction 5
2. Safety and Inspection 6
3. Maintenance 7
4. Compressed Air Supply 9
5. Compressed Air Line Sizes 10
6. Installation 14
7. Operation 17
8. Solenoid Valve and Thermostat (Cabinet Cooler System Only) 20
9. Approvals 22
10. Troubleshooting 23
5
1. Introduction
The Meech Air Technology Cabinet Cooler (product code: A70025EX) uses
compressed air to provide a cold air source which stops industrial cabinet/panels
or enclosures overheating and prevents ingress of contamination such as dust or
moisture.
The EX Cabinet Cooler Unit (excluding Solenoid Valve and Thermostat) is intrinsically
safe, and requires virtually no maintenance. They have no moving parts making them
ideal for harsh environments.
Ex Cabinet Coolers can be used with electrical thermostats or solenoids but they need
to be positioned outside the hazardous area.
6
2. Safety and Inspection
Meech Cabinet Coolers are packed carefully at our factory. Nevertheless, we
recommend careful examination of the carton and contents for any damage.
To protect yourself and others when using compressed air, you should be aware of the
following general safety guidelines:
Warning – When compressed air is misused, it can cause serious injury or
even death.
Never point an air hose at anyone in fun or to remove dirt from clothing or the
body.
Never use compressed air without adequate eye and ear protection. Use
safety glasses with side shields or goggles and ear protectors.
Before attempting to disconnect a hose from an air line, the air should be cut
off, and the remaining air bled from the line.
Keep air hoses off the oor where they become tripping hazards and are
subject to damage by vehicles, doors, and dropped tools. If possible, suspend air
hoses from overhead.
Please be aware of the following safety guidelines specic to the Cabinet Cooler:
Cabinet Coolers create both hot and cold air so parts of the unit will become hot.
The user shall ensure that the certication of any enclosure onto which this is
installed, is not compromised by the installation or operation of this device.
The equipment shall be suitably earthed (grounded) prior to operation. Earth
continuity shall be maintained between the equipment and the enclosure to which
it is installed on.
Inlet pressure shall not exceed 5.5 Bar (80 PSI).
7
Inlet air temperature shall not exceed 55°C.
The Meech Cabinet Cooler has the following IECEx certication:
Ex h IIC T4 Gb Ta -10°C to +55°C
All other parts of the Cabinet Cooler System including the Solenoid Valve and
Thermostat must be installed outside the hazardous area.
The cold fraction adjustment valve must not be altered and remain at 2.5 turns
open.
Ambient operating temperature must not exceed 55°C
Ambient operating temperature can not drop lower than -10°C
3. Maintenance
The Meech Cabinet Cooler has no moving parts. Clean compressed air moving
through the Cabinet Cooler will not cause wear on any of the components.
Occasionally, dirt, water or oil may enter the cooler from the compressed air supply.
This could hinder the performance. If this happens simply take the unit apart, clean
the parts with soapy water, allow drying time and then reassemble.
When reassembling ensure you tighten all the components. If the parts are not
tightened correctly, the coolers performance may be affected. Also, please ensure the
generator is tted. At the same time the element in the air lter should be changed.
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David.Hyde
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Sheet
Meech Internatio nal
2 Network Point
Range Road, Witne y
OX29 0YN, UK
Tel: +44 (0) 1993 706700
Fax: +44 (0) 1993 776977
email: sales@meec h.com
web: www.meec h.com
COPYRIGHT © MEECH ST ATIC ELIMINAT ORS
THIS DOCUMENT AND THE INFORMATION
THERE IN IS THE PROPE RTY OF THE ME ECH
GROUP AND SHOULD NOT BE COPIED IN WHOLE
OR PART OR USED FOR MANUFACTURE OR
OTHERWISE DISCLOSED WITHOUT THE PRIOR
WRITTEN CONSENT OF MEECH INTERNATIONAL
MATERIAL:
FINISH:
TOLERANCE UNLESS
OTHERWISE SPECIFIED
Machined Work Metric ±0.1mm
Unmachined Fabrications ±1mm
Angular ±0°30'
PROJECTION
DIMENSIO NS IN MM
DO NOT SCALE
TITLE:
DRAWING No:
REVISION:
SHEET:
STATUS:
CRITICAL TO FUNCTION
(CTF) DIMENSION S AS
MARKED
SIGNED OFF:
PARTS LIST
MATERIAL
DESCRIPTION
PART NUMBER
QTY
ITEM
BrassBrass SleeveD5038011
Stainless SteelBulk Head Fitting InsertD5038112
Stainless Steel
Bulkhead Fitting
D5003213
SteelSilencer SpringD5008814
Nitrile
O Ring 17 x 3
D5007515
Zytel 101GeneratorMultiple See Page 2 16
NitrileO Ring 3/8 x 1/4D5007617
Nitrile
O Ring 38 x 1.6D5007438
Stainless SteelSmall Hot End ValveD5008319
Nitrile
Relief Valve
D50035110
Stainless SteelSpin Chamber
D50383111
Stainless SteelHot End CapD50056112
NitrileO Ring 30 x 3D50034 113
Stainless Steel
Bulk Head WasherD50036114
Stainless SteelBulkhead Nut 33mmD50033115
Stainless SteelHot End Sleeve
D50061116
PVCEnd CapD50081117
PlasticPlastic InsertD50094118
Foam
Silencer FoamD50040119
Cabinet Cooler
4
14
15
10
13
3
6
5
1
11
8
19
16
18
9
12
7
2
45,24 [1,78]
194,4 [7,65]
2,4 [0,09]
Cold Air Outlet
Hot Air Outlet
Compressed Air Inlet
8
8
Cabinet Cooler Assembly
C000015
Various
Various
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4. Compressed Air Supply
It is recommended to use a 5-micron (or smaller) lter to remove water and dirt from
the compressed air supply. A 5-micron lter will remove 99% of foreign material from
the air supply; the use of an oil lter with an effective ltration of 0.01 ppm will remove
the oil droplets for an even cleaner compressed air supply.
If this is not EX certied it will need to be installed outside the hazardous area.
Failure to use a lter may cause clogging and freezing of the compressed air line and
the components within the Cabinet Cooler.
When the temperature of the compressed air within the Cabinet Cooler reaches 0°C
the water vapour in the air will start to freeze. This could potentially cause a problem
with ice clogging the orices of the Cabinet Cooler.
In this instance an air dryer must be used to lower the dew point and keep water
vapour out of the air line. A dryer rated at -19°C will produce a dew point low enough
to eliminate the water vapour freezing.
10
5. Compressed Air Lines Sizes
Figuring the correct pipe size for your compressed air system is an important task.
Pipe that is sized too small can create big pressure losses and reduce operating
efciency.
Many people who plan the piping never consider the ttings or the future.
FITTINGS: Every pipe tting creates a certain amount of increased frictional air loss
that is equal to a specied length of pipe. Any turns in the pipe at ttings, ells, tees,
and valves increase pressure drops even more.
FUTURE: Are you planning to add more equipment in the next year or two? Then
plan for larger piping now. Since the material costs in piping are low compared to
installation or replacement cost, it’s wise to select pipe of an adequate size. If there
is any doubt that a pipe size may create a pressure drop, use the next largest size.
Remember that an oversize pipe compensates for possible scale build-up and
provides for future expansion of the overall air system.
Steps to calculating overall piping size for your compressed
air system:
1. Determine your air compressor’s maximum CFM.
2. Draw a piping schematic and show all pipe ttings, valves, etc.
3. Measure and write the corresponding lengths of pipe on your schematic, then
total the length of all straight pipes needed and note that on your schematic.
4. Using TABLE 1 (over page), nd your compressor’s CFM number on the far left
column, and then go to the right until you see the column header with nearest
length in feet to your total pipe length. Find where the CFM & PIPE LENGTH
intersect on the chart and it will show the recommended pipe size for that length.
5. Take that pipe size to TABLE 2 and use the table to nd all the EQUIVELENT
Table des matières
