M&C EC Series User manual

Electric Gas Cooler Series EC®
ECM-ExII
EX II 3G ec ….
Class I, Div. 2, Groups A/B/C/D, T4
Instruction Manual
Doc: M_ECM-EX_EN_
Version 1.02.00

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Dear customer,
Thank you for buying our product. In this instruction manual you will find all necessary information about
this M&C product. The information in the instruction manual is fast and easy to find, so you can start
using your M&C product right after you have read the manual.
If you have any question regarding the product or the application, please don’t hesitate to contact M&C
or your M&C authorized distributor. You will find all the addresses in the appendix of this manual.
For additional information about our products and our company, please go to M&C’s website www.mc-
techgroup.com. There you will find the data sheets and manuals of all our products in German and
English.
This Operating Manual does not claim completeness and may be subject
to technical modifications.
©
M&C TechGroup Germany GmbH
. Reproduction of this document or
its content is not allowed without permission from
M&C.
ECM
®is a registered trade mark.
Version: 1.02.00
Intern: 1.02.0
0

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Content
1General information............................................................................................................4
2Declaration of conformity...................................................................................................4
3Safety instructions .............................................................................................................5
4Warranty .............................................................................................................................6
5Warning signs and definitions............................................................................................6
6Information and safety instructions for using the cooler in hazardous areas...................8
7Information and safety instructions for using the cooler...................................................9
8Introduction ......................................................................................................................10
8.1 Serial number...................................................................................................................10
8.2 Power supply ...................................................................................................................10
8.3 Patent references .............................................................................................................10
9Technical Data ..................................................................................................................11
9.1 For basic cooler ECM-ExII without heat exchanger ............................................................11
9.2 Options for basic cooler ECM-ExII.....................................................................................12
10 Application........................................................................................................................13
11 Description .......................................................................................................................14
12 Function............................................................................................................................ 15
13 Receiving and storing of the device.................................................................................16
14 Installation instructions....................................................................................................16
15 Mounting...........................................................................................................................17
15.1 Tubing connections ..........................................................................................................17
16 Electrical connections......................................................................................................19
17 Start-up.............................................................................................................................20
18 Closing down....................................................................................................................21
19 Maintenance .....................................................................................................................21
19.1 Adding and replacing the heat exchangers ........................................................................22
19.2 Cleaning the fins of the condenser ....................................................................................23
19.3 Maintenance of the optional mounted peristaltic pump(s), type SR25.2...............................23
19.3.1 Mounting instructions for SR25.2 peristaltic pump (optional)........................................23
19.3.2 Replacing the pump tubing.........................................................................................24
19.3.3 Replacing contact pulleys and springs ........................................................................26
19.3.4 Cleaning the pump head............................................................................................26
20 Operating of the built-in electronic temperature controller .............................................27
20.1 Changing the set value.....................................................................................................27
20.2 Changing the temperature alarm window...........................................................................27
21 Trouble shooting ..............................................................................................................28
22 Spare parts list .................................................................................................................29
23 Appendix...........................................................................................................................30
List of illustrations
Figure 1 Application example of the ECM-ExII............................................................................13
Figure 2 ECM-2G ExII ...............................................................................................................14
Figure 3 Diagram of the heat exchanger function........................................................................15
Figure 4 Position of the gas and condensate connections ...........................................................17
Figure 5 Electrical connections, alarm contacts ..........................................................................19
Figure 6 SR25.2: Mounting distance between front panel and pump motor..................................24
Figure 7 Replacing the pump tubing...........................................................................................25
Figure 8 Front view of the temperature controller........................................................................27
Figure 9 Sample gas output dew point as a function of gas flow at 60 °C inlet dew point.............. 30
Figure 10 Circuit diagram ECM-ExII (Drawing-No.: 2456-5.01) .....................................................31

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Head Office
M&C TechGroup Germany GmbH Rehhecke 79 40885 Ratingen Germany
Telephone: 02102 / 935 - 0
Fax: 02102 / 935 - 111
E - mail: [e-mail]
www.mc-techgroup.com
1 General information
The product described in this manual has been built and tested in our production facility.
All M&C products are packed to be shipped safely. To ensure the safe operation and to maintain the
safe condition, all instructions and regulations stated in this manual need to be followed. This manual
includes all information regarding proper transportation, storage, installation, operation and
maintenance of this product by qualified personnel.
Please follow all instructions and warnings closely.
Please read this manual carefully before commissioning and operating the device. If you have any
questions regarding the product or the application, please don’t hesitate to contact M&C or your M&C
authorized distributor.
2 Declaration of conformity
CE - Certification
The product described in this operating manual complies with the following EU directives:
ATEX-Directive
The product described in this manual is produced in accordance with the EU directive for devices and
protection systems for appropriate use in hazardous areas 2014/34/EU.
RoHS Directive
The requirements of the RoHS2 (‘Restriction of Hazardous Substances 2’) directive 2011/65/EU and its
annexes are met.
EMV-Instruction
The requirements of the EU directive 2014/30/EU ‘Electromagnetic compatibility’ are met.
Low Voltage Directive
The requirement of the EU directive 2014/35/EU ‘Low Voltage Directive’ are met.
Declaration of conformity
The EU Declaration of conformity can be found in the annex of this manual. It can also be downloaded
from the M&C homepage or directly requested from M&C.

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3 Safety instructions
Please follow these safety directions and instructions regarding installation, commissioning
and operation of the equipment:
•Read this manual before commissioning and operating the product. Please make sure to follow
all safety instructions.
•Attention must be paid to the requirements of the Type Examination Certificate (see appendix):
16 ATEX E 055 X.
•Installation and commissioning of electrical devices must be carried out only by qualified skilled
personnel in compliance with the current regulations.
•The installation and commissioning of the device must conform to the requirements of VDE 0100
(IEC 364) ‘Regulations on the Installation of Power Circuits with Nominal Voltages below 1000
V’ and must be in compliance with all relevant regulations and standards.
•For use in hazardous area, observe the relevant national and international directives and
regulations.
•Before connecting the device, make sure to compare the supply voltage with the specified
voltage on the product label.
•Protection against damages caused by contact with parts carrying high voltages:
Disconnect the power supply before opening the device for access. Make sure that all extern
power supplies are disconnected.
•Operate the device only in the permitted temperature and pressure ranges. For details please
refer to the technical data sheet or manual.
•The device needs to be mounted inside a housing or cabinet with protection class IP54 or higher,
complying with the IEC 60079-0 standard.
•Installation, maintenance, inspections and any repairs of the devices must be carried out only
by qualified and skilled personnel in compliance with the current regulations.

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4 Warranty
In case of a device failure, please contact immediately M&C or your M&C authorized distributor.
We have a warranty period of 12 months from the delivery date. The warranty covers only appropriately
used products and does not cover the consumable parts. Please find the complete warranty conditions
in our terms and conditions.
The warranty includes a free-of-charge repair in our production facility or the free replacement of the
device. If you return a device to M&C, please be sure that it is properly packaged and shipped with
protective packaging. The repaired or replaced device will be shipped free of delivery charges to the
point of use. Do not send the heat exchangers with the device.
5 Warning signs and definitions
Danger
The ‘Danger’ warning sign indicates that death, serious injury and/or
significant material damage will be the consequence, if the
appropriate precautions should not be taken.
Warning
The ‘Warning’ warning sign indicates that death, serious injury or
damage to property may occur if the relevant precautionary
measures are not observed.
Caution
The ’Caution’ warning sign indicates that slight personal injury can
occur if the appropriate safety precautions are not observed.
Caution ’Caution‘
indicates that damage to property can occur if the
appropriate safety precautions are not observed.
Attention
‘Attention’ indicates that an unintended result or situation can occur
if the corresponding information is not taken into account.
Note
‘Note’ indicates important information relating to the product or
highlights parts of the documentation for special attention.
Qualified personnel
‘Qualified personnel’ are experts who are familiar with the
installation, mounting, commissioning and operation of these types
of products.
These are important information about the
product or parts of the
instruction manual referring to operating in hazardous areas.

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High voltages!
Protect yourself and others against damages which might be caused
by high voltages.
Toxic!
Acute toxicity (oral, dermal, inhalation)! Toxic when in contact with
skin, swallowed or inhaled.
Corrosive!
These substances destroy living tissue and equipment upon contact.
Do not breathe vapors; avoid contact with skin and eyes.
Wear protective gloves!
Working with chemicals, sharp objects or extremely
high
temperatures requires wearing protective gloves.
Wear safety glasses!
Protect your eyes while working with chemicals or sharp
objects.
Wear safety glasses to avoid getting something in your eyes.
Wear protective clothes!
Working with chemicals, sharp objects or extremely
high
temperatures requires wearing protective clothes.

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6 Information and safety instructions for using the cooler in hazardous areas
The compressor cooler ECM-ExII is suitable for using in hazardous area of zone 2 (see Ex-certificate).
The explosion proof protection for both models is:
230 V / 115 V: II 3 G Ex nA nC IIC T4 Gc
(Registration-No.: BVS 16 ATEX E 055 X)
230V / 115V: Class I, Div. 2, Groups A/B/C/D,
T4 / CAN/CSA-C22.2 No 61010.1-4; No. 213-M87
115 V: Class I, Div. 2, Groups A/B/C/D,
T4 / FM Approval Standard Class No. 3611.
The certification of the cooler was done by the DEKRA EXAM BBG Prüf- and
Zertifizier GmbH.
For detailed information and a copy of the certificate see appendix.
Installation and operating of the cooler has to be done corresponding to the
conditions specified in the Ex-certificate (see appendix). Only in this case the
reliability of the operation in the hazardous area can be guaranteed.
Any modification of the standard configuration of the device with parts, which are
not approved by M&C and not explicitly s
pecified for usage in explosive
atmospheres, will void the Type Examination Certificate. This also refers to any
repair work and service using parts which are not M&C approved and not specified
for usage in explosive atmospheres.
Please don’t hesitate to
contact M&C or your M&C distributer if you have any
questions about parts, service and repair work of the device.
Disconnect power supply before opening the device for access.
Make sure that all external power supplies are disconnected.
This also applies to any external control circuits which may be connected.
Pay close attention to the requirements of the Type Examination Certificate in the
appendix of this instruction manual: 16 ATEX E 055 X.
Only carry out work on the controller, when the process and area is declared
as an
explosive free zone. An explosive free zone is free of explosive atmosphere.

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7 Information and safety instructions for using the cooler
Warning
Inhalation hazard possible, if using toxic or asphyxiant gases!
Purge cooler with inert gas or air before opening! If the cooler is used for
toxic gas or asphyxiant (oxygen-
displacing) gas, it needs to be purged with
inert gas or air before opening. Follow closely all relevant occupational
safety regulations during operation..
Warning
Disconnect power supply before opening the device for access.
Make sure that all external power supplies are disconnected.
Do not carry out any work at the sensor while potentially explosive
atmosphere is present.
The process and the environment of the device needs to be explosion-
free
(explosion-
free zone) during any maintenance or repair work. A zone is
declared as explosion-free zone, if it is free of explosive atmosphere.
Aggressive condensate is possible.
Wear protective gloves and protective glasses!
Wear proper protective clothing!

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8 Introduction
The M&C ECM-ExII gas cooler unit is designed to operate whenever there is moisture interference in
the sample gas.
Lowering the sample gas temperature to a very low and stable dew point prevents condensate built-up
in the analyser and avoids unstable measurements, because of water vapour cross-sensitivity or
volumetric errors.
The ECM-ExII is certified for appropriate use in the specified Ex zones noted in the Type Examination
Certificate.
Only operate the ECM-ExII according the specifications stated in this instruction manual
and in the extended manufacturer documents.
8.1 Serial number
The type plate with the serial number is located at the right hand side panel of the cooler housing (wall
mounting version).
Please refer to this serial number if you have any questions about your ECM-ExII or if you need to order
spare parts or consumables.
8.2 Power supply
The cooler can be operated with AC voltage in the range of 110 V to 240 V, 50 to 60 Hz.
8.3 Patent references
The M&C sample gas cooling device is patented under the following patent number:
• Germany 199 57 052
• USA 6.477.851

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9 Technical Data
9.1 For basic cooler ECM-ExII without heat exchanger
Gas cooler series EC
version ECM-1 ExII
version ECM-2 ExII
Part No.
02K7600x (a)**
02K7610x (a)**
Amount of possible
heat exchanger
Prepared for 1 stream
Prepared for 2 streams
Sample outlet dewpoint
Range of adjustment: +2 °C … +7 °C [+35.6 °F…+44.6 °F],
factory setting: +5 °C [+41 °F]
Dew point stability
At const. conditions: < ±0.1 °C [±0.18 °F]
Sample inlet temp. in
EX zone with T3
***Max. +180 °C [356 °F] if cooler is mounted in EX zone with
temperature class T3
Sample inlet temp. in
EX zone with T4
***Max. +120 °C [248 °F] if cooler is mounted in EX zone with
temperature class T3
Sample inlet dew point
***Max. +80 °C [176 °F]
Gas flow rate
***Max. 250 l/h
Ambient temperature
+10 to +50 °C [+50 to +122 °F]
Storage temperature
-20 to +60 °C [-4 to +140 °F]
Total cooling capacity
40 W at 10 to 50 °C [+50 to +122 °F] ambient temperature
Ready for operation
< 15 min
Power consumption
Max. 200 VA (start up current at 230 V = 2.5 A; at 120 V = 4.5 A)
Main power connection
230 V / 115 V, 50 Hz/60 Hz (a): -15 % / +10 %
Electrical connections
Terminals: 6-12 mm , cable gland: 2 x M20 x 1.5
Status alarm
1 free configurable status alarm with 2 potential free change-over
contacts, alarm point: < 2 °C [35.6 °F] and > 8 °C [46.4 °F] factory
setting)
contact rating 250 VAC, 2 A; 500 VA; 50 W
Explosion proof
protection
230 V / 115 V:
II 3 G Ex nA nC IIC T4 Gc
(Registration-No.: BVS 16 ATEX E 055 X)
240V / 120V:
Class I, Div. 2, Groups A/B/C/D, T4
CAN/CSA-C22.2 No 61010.1-04 and No. 213-M87
120V:
Class I, Div. 2, Groups A/B/C/D, T4
FM Approval Standard Class No. 3611
Electrical safety
EN EN 61010
CAN/CSA-C22.2 No.61010.1-04
UL Std. No. 61010-1(2 Edition)
System of protection
IP20 (EN 60529)
Case colour
RAL 9003
Method of mounting
Wall mounting
Dimensions
Weight
270 x 270 x 316 mm [10.63” x 10.63” x 12.44”] W x H x D
12 kg [26.46 lbs] / 13.5 kg [29.76 lbs] (version: 230 V / 115 V)
** Option
*** Maximum values in technical data must be rated in consideration of total cooling capacity at 25 °C [77 °F] ambient
temperature and an outlet dew point of 5 °C [41 °F].

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9.2 Options for basic cooler ECM-ExII
Heat exchanger type
ECM-1G
ECM-1PV
ECM-1SS
ECM-2G
ECM-2PV
ECM-2SS
Part No
93K0140
93K0170
93K0160
97K0100
97K0110
97K0115
Material of heat
exchanger
Borosilicat
e glass
PVDF
st. steel
316Ti
Borosilicat
e glass
PVDF
st. steel
316Ti
Max. gas flow rate
250 Nl/h
250 Nl/h
250 Nl/h
150 Nl/h
150 Nl/h
150 Nl/h
Sample gas pressure
abs.
Max. 2 bar
(3 bar)
1
Max. 3 bar
Max.
10 bar
Max. 2 bar
(3bar)
1
Max. 3 bar
Max.
10 bar
Sample gas
connection
GL 18
for Ø 6 mm
a.d. tube*
G1/4“ i
G 1/4“ i
oder 1/4“
NPT**
GL18
for Ø 6 mm
a.d. tube*
Tube
Ø 6 mm*
Tube
Ø 6 mm*
Condensate
connection
GL 25 for
Ø12 mm
tube*
Ø 8 mm or
Ø 10 mm**
G3/8“i
G3/8“i o.
3/8“NPT**
GL 25 for
Ø 12 mm
tube*
Ø8 mm or
Ø10 mm**
G3/8“i
G 3/8“ i o.
3/8“NPT**
∆P at max. flow
1 mbar
1 mbar
1 mbar
1 mbar
1 mbar
1 mbar
Stagnant space
approx.
100 ml
100 ml
100 ml
40 ml
25 ml
30 ml
Peristaltic pump
SR25.2
1 pc. incorporated in the cooler, compl. installed, part no.: 01P9125;
Novopren tubing, pumping capacity 0.3 l/h, 5 rpm, cooler weight plus 0.6 kg
[1.32 lb] per pump
The sample gas pressure is limited to 2 bar absolute
For more information about the SR25.2 and about other tubing materials
see SR25.2 manual.
* Standard, other versions on request 1with GL connecting adapter
** Option
*** Maximum values in technical data must be rated in consideration of total cooling capacity at 25 °C [77 °F] ambient
temperature and an outlet dew point of 5 °C [41 °F].

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10 Application
Figure 1 shows a typical application example for an ECM-ExII gas cooler unit.




IN
+5°C
(+41 °F)
ECM-1





OPTION
 a
Figure 1 Application example of the ECM-ExII
1: Filter sample probe SP ... 6: Membrane pump
2: Heated sample line 7: Super fine filter FP ...
3: ECM-ExII cooler 8: Aerosol filter CLF-5
4: 3-way ball valve 9: Flow meter FM10
4a : Test gas 10 : Analyzer
5: Peristaltic pump (optional)
The sample gas enters the gas sample probe , and via a heated sample line it reaches the ECM-
ExII gas cooler . The gas cooler cools the sample gas down to a dew point of +5 °C [41 °F]. The
super-fine filter removes solid particles from the sample gas. To enhance the operating safety of the
entire system, we recommend installing a super-fine filter with a liquid alarm sensor. If required, an
aerosol filter can be installed in-line, in front of the flow meter . The conditioned gas can now enter
the analyser .
Do not use the gas cooler to extract gases or gas compositions, which could
be potentially explosive without the presence of air. Do not use gases or gas
compositions which can alter the relevant safety-related material properties
of the cooler materials. The gas or gas composition needs to be free of
particles which could cause, in combination with the materials of the gas
cooler, sparks by friction or impact.
Warning
Inhalation hazard possible, if using toxic or asphyxiant gases!
Purge gas cooler with inert gas or air before opening!
If the gas cooler is used for toxic gas or asphyxiant (oxygen-displacing) gas,
it needs to be purged with inert gas or air before opening. Follow closely all
relevant occupational safety regulations during operation.

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11 Description
Figure 2 shows the ECM-2G ExII cooler unit.
Figure 2 ECM-2G ExII
The cooler ECM-ExII is also suitable for wall mounting. The depth of the cooler housing is 270 mm
[10.63”] without, and 316 mm [12.44”] with optionally mounted peristaltic pumps.
Warning
The cooler ECM-ExII is conform to the system protection IP20 (EN 60529).
The gas cooler needs to be mounted inside a housing or cabinet with the
protection class IP54 or higher, complying with the IEC 60079-
0 standard.
Solids and water must be prevented from entering the cooler housing
through the ventilation outlets. For installation, according to NEC article
501.4 (B) (2) (conduit installation), the cable glands need to be replaced
by the enclosed Conduit Hub.
On the top of the cooler housing are cut-outs for 1 or 2 heat exchangers. The sample gas inlet and out
let are located at the upper part of the heat exchanger. For information about tubing connections of the
heat exchangers, please see chapter 8, technical data.
The main power connector and the output contact of the status alarm can be connected at terminals
X1 respectively X3, located behind the removable front panel of the ECM-ExII housing.
The following connections are accessible from outside the housing underneath the bottom plate:
•standard condensate outlets of the heat exchangers,
•cable bushings 2 x M20 x 1.5; clamp range 6-12 mm.
In under pressure operation the condensate will be removed either via optional SR25.2 peristaltic
pumps (pump in-line after the cooler), which are mounted into the front panel of the cooler, or with an
external condensate vessel TG.../TK....
In over pressure operation the condensate will be removed via an automatic liquid drainer type AD-...

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12 Function
The M&C gas cooler type ECM-ExII is a compressor cooler equipped with a status alarm for safe and
continuous operation.
Up to 2 Jet-stream heat exchangers made of Borosilicate glass, PVDF or stainless steel are located in
a heat-insulated cooling block, where they are easy to access and to remove.
Figure 3 shows a diagram of the heat exchanger function. The compressor cooler system keeps the
heat-insulated cooling block at a constant temperature of +5 °C [+41 °F].
The controlled, forced-air cooled compressor cooling system and the special design of the Jet-stream
heat exchanger ensure excellent condensate pre-separation and sample gas drying.
+5 °C
(41 °F)
Sample
OUT
Sample
IN
Condensate OUT
Cooling
block
Figure 3Diagram of the heat exchanger function

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13 Receiving and storing of the device
The ECM-ExII gas cooler is a complete pre-installed unit.
•Please remove the ECM-ExII carefully from the packaging. Check the scope of the delivery
specified on the delivery note. Please make sure that you have received all items stated on the
delivery note.
•Please check the unit for any transport damages after receipt, and report any complaints to the
transport company immediately.
Note
The cooler must be stored in a weather protected frost-free area!
The cooler should always be transported and stored in an upright position, with the
equipment feet facing downwards to ensure that the oil in the closed compressor
circuit cannot run out of the compressor case.
If the cooler was transported on its back by mistake, it needs to stand upright in the
operating position for approx. 24 hours before switching on!
14 Installation instructions
The gas coole
r needs to be mounted inside a housing or cabinet with the
protection class IP54 or higher, complying with the IEC 60079-
0 standard. The
gas cooler needs to be installed at a location, which is frost-
free in winter and
adequately vented in summer. Avoid direct sun light.
The operating position for this cooler is vertical only. This is the only way to ensure
proper separation and removal of condensate in the heat exchangers. During
transport and installation, the cooler needs to be in an upright
position, with the
equipment feet facing downwards to ensure that the oil in the closed compressor
circuit cannot run out of the compressor case.
Install the cooler away from heat sources in a well-ventilated area.
To prevent
heat build-up interfering with operation, install the device with a minimum distance
of 100 mm (3.94”) to other components.
Un-
heated sample gas lines need to be installed with a declining angle towards
the cooler. In this case, any built-up condensate in the gas lines can flow towar
ds
the cooler, and pre-separation of the condensate is not required.
Heated sample gas lines need to end at least 20 cm [7.874“]
before the gas line
reaches the cooler to make sure that the heated sample line and the cooler is
thermally decoupled. This means, the last 20 cm [7.874“]
of the gas lines are not
isolated.
•The ECM-ExII cooler is suitable for wall mounting.
The gas cooler needs to be mounted inside a housing or cabinet with the protection class IP54
or higher, complying with IEC 60079-0 standard.

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15 Mounting
Do not mount or carry out any work at the gas cooler while potentially
explosive atmosphere is present.
The process and the environment of the cooler needs to be explosion-free
(explosion-free zone) during mounting. A zone is declared as explosion-free
zone, if it is free of explosive atmosphere.
Warning
Connect the cooler to earth (electrical bonding terminal).
The bleeder resistor needs to have an overall value of < 106Ω.
15.1 Tubing connections
Note
Check tubing and hose connections for any type of leakage!
The sample gas inlet and out let are located at the upper part of the heat exchanger. For information
about tubing connections of the heat exchangers, please see chapter 8, technical data.
Figure 4 Position of the gas and condensate connections
Suitable tube and hose connectors are optional and available at M&C (see data sheet 11.5).
Note
Do not mix up the hose connections; the gas
inlet and outlet connections of the
heat exchangers are marked with arrows.
Make sure that all the connections are sealed adequately.
To ensure free removal of the condensate, do not decrease the stated
diameters
of the condensate removal lines
!
1Gas inlet and outlet
2
Condensate outlet
3
Condensate outlet with optional
mounted peristaltic pump

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Follow these instructions to ensure the adequate sealing of the connections:
Borosilicate glass heat exchangers with connections GL 18-6 respectively GL 25-12 (standard)
•Before assembly, check the GL coupling rings to see if the PTFE/silicon locking rings have been
damaged.
•The sealing rings should be installed with the PTFE side facing the medium.
PVDF- resp. stainless steel heat exchangers with G 1/4“ i resp. G 3/8“ i
•The fitting tubing or hose couplings with threaded connections have to be screwed in with PTFE
thread sealing tape.
•For a functional and smooth mounting, we recommend using union pieces with tapered pipe
thread type R according to DIN 2999/1 in connection with suitable sealing tape or fluid.
Note
To tighten the connectors onto the PVDF or stainless steel
heat exchanger, hold
a wrench against the spanner flats of the bushing!
Option: stainless steel heat exchanger with NPT
•The heat exchangers with NPT threaded connectors are marked with a notch around the
connecting pieces.
•The NPT thread must be screwed in with sealant or glued in with adhesive.
In the standard configuration, the tubes for condensate removal are connected directly to the heat
exchangers. These protrude with the GL 25-12 tube connectors (standard, Borosilicate glass heat
exchanger) respectively with G 3/8” (standard) thread joint PVDF or stainless steel heat exchanger out
of the bottom plate of the cooler housing (fig.2).
The condensate removal is customer specific and depends on the type of operation:
•peristaltic pump(s) type SR25.2 optionally mounted into the cooler housing,
•external mounted condensate vessel(s), which needs to be emptied manually respectively,
•automatic float-type liquid drainer type AD-... (only for over-pressure operation).
Note
If using a stainless steel heat exchangers with G 3/8” thread, the float-type
automatic liquid drainer AD-SS can be directly monted to the heat exchanger by
using the threaded adapter part number FF11000 (1/2” NPT to G 3/8” i). In this
case wall mounting and tubing of the AD-SS unit isn’t necessary!

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16 Electrical connections
Caution
Wrong supply voltage can destroy your cooler!
When connecting the equipment, make sure that the supply voltage is
identical with the information provided on the model type plate!
Warning
Only carry out work on live parts when
the area has been proved to be
„safe“. Only carry out work on the protective cover in front
of the
temperature controller, when the area has been proved to be „safe“.
Note
The installation and commissioning of the device must conform to the
requirements of VDE 0100 (IEC 364) ‘Regulations on the Installation of
Power Circuits with Nominal Voltages below 1000 V’ and must be in
compliance with all relevant regulations and standards.
The cooler has a replaceable fuse. Because of this replace
able fuse, the
installation site of the cooler needs to be equipped
with a suitable external
switch to switch off the main power supply.
Warning
Cooler versions with 115V resp. 120 V have a built-in
transformer to
generate an internal current of 230 V. This means, that the
internal live
parts of the device have a current of 230 V not 115 V / 120 V.
Figure 5 shows the electrical connections behind the front panel of the ECM-ExII housing.
For alarm incidents (over- and under-temperature), there is a user-configurable status alarm with two
potential-free changeover contacts available. The alarm will be set off, when the current temperature is
lower than +2 °C [+35.6 °F] or higher than +8 °C [46.4 °F] (default setting).
Figure 5Electrical connections, alarm contacts

20 ECM-ExII | 1.02.00 www.mc-techgroup.com
Follow these instructions to connect the status alarm and power cables:
•release the screws (7 pcs.) from the cooler hood and remove the hood;
•put the cables (6-12 mm) through one of the cable glands in the bottom plate, and connect them
according to the electrical connections in Fig. 5;
17 Start-up
The controlled cooling system of the ECMExII permits automatic start-up of the cooler.
The following description applies to a start-up at an ambient temperature of > 8 °C [> 46.4 °F] only.
Only carry out any work at the gas cooler, when the process and the
environment of the cooler is declared as an explosion-free zone. A zone is
declared as explosion-free zone, if it is free of explosive atmosphere.
Only open the protective cover in front of the temperature controller, when
the process and the environment of the cooler is declared as an explosion-
free zone. A zone is declared as explosion-free zone, if it is free of explosive
atmosphere.
Warning
Connect the cooler to earth (electrical bonding terminal).
The bleeder resistor needs to have an overall value of < 106Ω.
Note
Before starting up the gas cooler, it must be placed in its operating position
for at least two hours. The liquid inside the system may have been
redistributed, and this could cause problems during operating.
The following steps should be carried out before initial start-up:
•Connect the cooler unit to the mains power supply; Make sure that the equipment is connected
to the correct mains voltage, 115 V or 230 V, as shown on the type plate.
•Connect the status contact output to the measuring station;
Note
Connect the status contact output to an external sample gas pump or a solenoid
valve in the gas line. In case of an alarm incident, this can protect the whole
analysing system by immediate interruption of the gas supply.