M&C CSS Series User manual

Gas conditioning unit Series CSS®
CSS-M/W wall mount
Instruction Manual
Version 1.02.00

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Contents
1General information.................................................................................................................... 4
2declaration of conformity........................................................................................................... 4
3Safety instructions...................................................................................................................... 5
4Warranty ...................................................................................................................................... 5
5Used terms and signal indications............................................................................................ 6
6Introduction................................................................................................................................. 7
7Application .................................................................................................................................. 7
8Technical Data............................................................................................................................. 8
9Description.................................................................................................................................. 9
10 Receipt of marchendise and storage................................................................................... 10
11 Installation instructions....................................................................................................... 10
12 Supply connections............................................................................................................... 11
12.1 Hose connections ................................................................................................................ 11
12.2 Electrical connections .......................................................................................................... 12
13 Starting................................................................................................................................... 13
13.1 Cooler regulation.................................................................................................................. 13
13.2 New pump switch since 06/2007.......................................................................................... 14
14 Closing down......................................................................................................................... 14
15 Maintenance........................................................................................................................... 15
15.1 Replacement of the filter element and the O-Ring ............................................................... 16
15.2 Dismountage of the sample gas pump for examination or maintenance.............................. 16
15.3 Maintenance of the integrated peristaltic pump type SR 25.2 .............................................. 16
16 Operating of the integrated electronic temperature regulator........................................... 20
16.1 Changing the set value ........................................................................................................ 20
17 Trouble shooting................................................................................................................... 21
18 Spare part list ........................................................................................................................ 23
19 Appendix................................................................................................................................ 24
List of Illustrations
Figure 1 Scheme of gas flow........................................................................................................... 7
Figure 2 Dimensions CSS-M/W....................................................................................................... 9
Figure 3 Hose connections CSS-M/W ........................................................................................... 11
Figure 4 Electronic board CSS-M.................................................................................................. 14
Figure 5 Replacement of the filter element and the O-ring ............................................................ 16
Figure 6 Replacement of the pump hose....................................................................................... 17
Figure 7 Disassembly of pump head and driver............................................................................. 18
Figure 8 Check of axes and rolls................................................................................................... 18
Figure 9 Front view of the temperature regulator........................................................................... 20
Figure 10 Circuit diagram CSS-M/W............................................................................................. 25

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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.
© 12/2016 M&C TechGroup Germany GmbH. Reproduction of this
document or its content is not allowed without permission from M&C.
CSS®is a registered trade mark.
Version: 1.02.00

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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:
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.
The compliance with this EU directive has been examined according to DIN EN 61010.
Declaration of conformity
The EU Declaration of conformity can 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 CSS-M/W:
Read this manual before commissioning and operating the product. Please make sure to follow all
safety instructions.
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 1000V’ and must
be in compliance with all relevant regulations and standards.
Before connecting the device, please make sure to compare the supply voltage with the specified
voltage on the product label.
Protection against damages caused by 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.
Install the device only in protected areas, sheltered from rain and moisture. The product should not be
exposure to the elements.
This device is NOT certified to be installed or operated in explosive hazardous areas.
Installation, maintenance, inspections and any repairs of the devices must be carried out only by
qualified skilled personnel in compliance with the current regulations.
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.

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5 USED TERMS AND SIGNAL INDICATIONS
DANGER!
This means that death, severe physical injuries and/or important
material damages will occur in case the respective safety
measures are not fulfilled.
WARNING !
This means that death, severe physical injuries and/or important
material damages may occur in case the respective safety
measures are not fulfilled.
CARE!
This means that minor physical injuries may occur in case the
respective safety measures are not fulfilled.
CARE!
Without the warning triangle means that a material damage may
occur in case the respective safety measures are not met.
ATTENTI ON!
This means that an unintentional situation or an unintentional
status may occur in case the respective note is not respected.
NOTE!
These are important information about the product or parts of the
operating manual which require user’s attention.
SKILLED STAFF
These are persons with necessary qualification who are familiar
with installation, use and maintenance of the product.

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6 INTRODUCTION
The gas conditioning unit CSS-M/W for wall mounting is a completely pre-assembled compact gas
conditioning system working continuously and delivering a sample gas quantity of max. 70Nl/h.
The entire gas conditioning unit is housed in a compact and robust steel sheet case which ensures
that the gas analyses can be carried out quickly, safely and with a minimum amount of maintenance.
The gas conditioning unit CSS-M/W for wall mounting must not be used for sampling of explosive
gas/air or gas/oxygen mixtures, for sampling of combustible gases which may result in an explosive
mixture in combination with air or oxygen nor in explosive atmospheres and hazardous areas.
7 APPLICATION
The gas conditioning unit CSS-M/W for wall mounting has been developed for continuous operation.
The components integrated in the system CSS-M/W are intended for „standard use“.





Figure 1 Scheme of gas flow
Gas cooler ECP
Front panel filter FPF-2-0,3GF, 0.3 µm porosity with integrated liquid alarm
Sample gas pump N3 KPE
Flowmeter FM40
Peristaltic pump SR25.2 for continuous automatic condensate removal

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8 TECHNICAL DATA
Gas Conditioning Unit Type
CSS-M/W
Sample outlet dew point
Range of adjustment: +2 °C (+35.6 °F) ..... +15 °C (+59 °F),
factory setting: +5 °C (+41 °F)
Dew point stability
at constant conditions < ± 0.1 °C (± 0.18 °F)
Sample inlet temperature
**max. 80 °C (+176 °F)**
Gas inlet water vapour saturation
**max. +50 °C (+122 °F)
Gas flow rate
**max. 70 l/h
Ambient temperature
**+10 °C to +45 °C (+50 °F to 113 °F) **
Air humidity
75 % year’s average, rare and slight dewing of 95% on 30
days per year admissible
Storage temperature
-25 °C to +65 °C (~-13 °F to +149 °F)
Pressure
0.7 bar to 1.4 bar abs.*
Total cooling capacity
max. 40 kJ/h
Number of gas inlets
1
Number of gas outlets
1*
Sample gas connections
Hose connection 4/6 mm
Material medium-touched parts
Glass, PVDF, PVC, Novoprene®, FPM, PPH
Ready for operation
Approx. 10 min.
Mains power supply
230 V 50 Hz ± 10 % or 115 V 60 Hz ± 10 %
Power consumption
max. 240 VA
Fuse protection
4 A, time-lag, 5 x 20 mm (approx. 0.2” OD x 0.79” length)
Electrical mains supply
mains cable 3 x 1 mm2(approx. AWG 17), signal cable 3 x 0.5
mm2(approx.. AWG 20), 3 m (9.84 ft) length
Status alarm, 1 change over
contact, potential free
contact rating 250 VAC, 2 A, summary alarm for gas flow, liquid
and cooler temperature
Case protection
IP20 (EN 60529)
Housing version
Sheet steel case
Case dimensions (H x W x D)
177 mm x 220 mm x 300 mm (6.97” x 8.66” x 11.81”)
Weight
Approx. 11 kg (24.25 lbs)
PVDF=Polyvinylidenefluoride
PVC=Polyvinyl chloride
FPM=Fluor caoutchouc
PPH=Polypropylene hard
Specifications for components see appendix
* Standard
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 DESCRIPTION
Figure 2 shows the dimensions and construction of the CSS-M/W.
5,0
246
7
10
101,5
37,75






177
263
15
Netzkabel
372,5
300
47,5
Signalkabel
Kondensat
Aus
Figure 2 Dimensions CSS-M/W
Fine filter FPF-2-0,3GF
Electronic controller
Flow meter FM40 with sample gas outlet
Peristaltic pump SR25.2 with condensate outlet
Pump switch
LED indication condensate alarm red
Sample gas inlet
All components of the gas conditioning unit are mounted in a compact sheet steel case. Filter and
peristaltic pump are placed into the front panel and thus assure a very easy maintenance.
The minimum debit is determined by the gas sampling pump (see also chapter 13). Premature
damage can be caused to the pump membrane if less than the minimal total amount of flow is
extracted as a result of excess pressure.
The gas cooler is equipped with a heat exchanger of Duran glass.
The fine filter FPF-2-0,3GF (0.3 µm filter fineness) installed in front of the sample gas pump
N3 KPE ensures the necessary removal of solid particles.
The instrument contains a temperature alarm contact that is activated in case the temperature differs
more than +/-3 °C (+/- 5.4 °F) from the set value (+ 5°C (+41 °F)) adjusted at the factory.
The temperature alarm contact of the cooler (+8 °C or +2 °C) (+46.4 °F or +35.6 °F) controls
automatically the switching on and off of the sample gas pump provided the switch “Pump on” has
been actuated (beaming green). The condensate occurred is removed continuously via the peristaltic
pump type SR25.2.
The DN4/6 mm hose connections fort he condensate and sample gas outlet are located on the front
panel, the DN4/6 mm sample gas inlet is located on the back side on the case.
The ventilation grids in the sidewalls ensure that the equipment is sufficiently ventilated.

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A liquid alarm sensor is integrated in the filter FPF-2-0,3GF to protect the downward analysers against
liquid irruptions and to increase the operating safety of the whole system. In case of liquid inrush, the
internal electronic of the sample gas pump is automatically switched off.
10 RECEIPT OF MARCHENDISE AND STORAGE
The gas sampling system CSS-M/W is a completely pre-installed unit. The scope of delivery includes
furthermore:
25 Filter elements (1 pckg.)
1 Connection cable
1 Operating Manual
Please take the CSS-M/W and possible special accessories carefully out of the packaging material
immediately after arrival, and compare the goods with the items listed on the delivery note;
Check the goods for any damage caused during delivery and, if necessary, notify your transport
insurance company without delay of any damage discovered.
NOTE!
The gas conditioning system should be stored in a protected frost-free area!
11 INSTALLATION INSTRUCTIONS
NOTE!
In order to ensure that the case is safe and stable when being used, it
should be placed on a horizontal surface free from vibrations. Only then, the
perfect functioning of the separation and drainage procedures of the
condensate inside the heat exchanger of the cooler will only be guaranteed.
The gas conditioning system should be kept away from heat sources and be
freely ventilated in order to prevent an accumulation of heat.
When the equipment is being used outside, ample protection against the
effects of direct sunlight and dampness must be provided. In winter, the
equipment must only be used in frost-free areas; pay attention to the type of
the equipment protection.
Please avoid temperature variations, strong airflow as well as aggressive
atmospheres at the instalment location.
In order to guarantee the operational safety of the gas conditioning system
and the downstream analysers, and to avoid false alarms, the gas
conditioning unit should not be used at temperatures other than those
specified. Furthermore, it must be protected against dust deposits and
penetrating dust.
It is of great importance that the analysers connected downstream are used
at temperatures well above the specified gas outlet dew point of +5 °C (+41
°F). This prevents the gas in the connector lines to the analysers from
subsequent condensing.
Unheated gas sample lines must be installed with slope up to the cooler. In
this case, a preliminary condensate separation is not required.

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12 SUPPLY CONNECTIONS
12.1 HOSE CONNECTIONS
Condensate out DN3,2/6,4
Mains cable
Signal cable
350mm
3000mm
3000mm
Sample gas inlet DN4/6
Sample gas outlet DN4/6
Figure 3 Hose connections CSS-M/W
NOTE!
Do not mix up the hose connections; the connections are marked
accordingly in figure 3.
After having connected all lines, please check the seals.
All hose connections are DN4/6 mm sealing ring threaded hose couplings out of PVDF/PPH as
standard. They are suitable for gas inlet temperatures of maximum 80 °C (176 °F) (see chapter 8).
The mounting of the sample gas hoses and the condensate hoses is to be executed as follows:
Remove the union nut from the sealing ring couplings by turning it anti-clockwise. The nut should
be removed from the thread with great care so as to ensure that the loose sealing ring in the nut is
not lost.
Place the union nut over the connecting hose.
Push the sealing ring over the connecting hose with the thicker bead towards the nut.
Place the hose over the nipple on the thread.
NOTE!
The tightness of the connections can only be guaranteed if the connecting
hose has a straight edge (use a hose cutter).
The union nut is to be screwed tight by hand.

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The hose will no longer be able to slip off, and is now compression-proof.
The hoses are to be removed in the reverse order.
WARNING !
Aggressive condensate is possible.
Wear protective glasses and proper protective clothing!
12.2 ELECTRICAL CONNECTIONS
WARNING !
False supply voltage can damage the equipment. When connecting
the equipment, please ensure that the supply voltage is identical
with the information provided on the model type plate!
NOTE!
For the assembly of power installations with rated voltages up to
1000 V, the requirements of VDE 0100 and relevant standards and
specifications must be observed!
The main circuit is equipped with a fuse corresponding to the
nominal current (over current protection); for electrical details see
technical data.
The gas conditioning unit CSS-M/W is available with either 230 V / 50 Hz or 115 V / 60 Hz (for circuit
diagram see Appendix). A 4 A fuse is used on all models as fuse protection. The fuse is located on
the electronic board inside the steel sheet case.
The electrical connection is made via the mains cable of 3 x 1 mm2(approx. AWG 17) on the back
side of the case.
Brown = L
Blue = N
Green/yellow = PE
Connection of the signal lines:
The signal cables, 3 m (9.84 ft) long, 3 x 0,5 mm2(approx. AWG 20) are numbered from 1 –3 (Status
signals of the condensate controller, the cooling temperature and the optional flow alarm sensor).
1 = NC
2 = MC
3 = NO
Please install the signal lines separated from the power supply lines. The contact rating for the alarm
contact is max. 250 VAC 2 A.

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13 STARTING
Before starting the gas conditioning system, pay attention to the site-oriented and process-oriented
precautions. Please check once again that the operating voltage (see type plate) corresponds to the
supply voltage!
NOTE!
Before connecting the equipment to the mains voltage, the main switch
must be in position “0“.
The following steps have to be done before starting up for the first time:
Place the cold appliance plug, which is delivered with the mains supply cable, into the cold
appliance plug socket;
Connect the mains plug to the mains;
Turn the main switch to the position ‘I’.
After the starting time (LED K1 on the controller is beaming), the gas conditioning system is ready for
use, and the sample gas pump is switched on provided the key is activated (shines green).
The sample gas must not be fed before the starting time of the sample gas cooler is finished, i.e. if the
sample gas outlet temperature does not exceed the limits adjusted at works (LED K1 on the controller
is beaming).
NOTE!
The request for a maximum pressure load of the sample gas pump N3 KPE
of 1.4 bar abs. results in the following minimal gas flow rate:
N 3 KPE min. 30 l/h air,
Premature damage can be caused to the pump membrane due to excess
pressure if less than the minimal total amount of flow is extracted.
In case of long-term measurements with a high level of dust, it is necessary
to utilise a suitable sample gas probe in order to protect the sample leads
from clogging-up.
13.1 COOLER REGULATION
Indication
LED K1
LED K2
After starting up
> 8 °C (46.4 °F)
(Ambient temp.)
Off (Status alarm and pump
off)
Beaming permanently
yellow
(cooling)
After approx. 10 min.
7.5 °C
(45.5 °F)
Beaming yellow.
In case no condensate alarm
is given and the pump switch
is activated (beaming green),
the pump will be switched on.
Sample gas is lifted.
Beaming permanently
yellow
(cooling)
Normal operation
5 °C (41 °F)
Beaming yellow
Beaming yellow
(Regulation of the
cooler)

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13.2 NEW PUMP SWITCH SINCE 06/2007
In the past time, it happened repeatedly that the pump switch of the gas conditioning system CSS-M..
failed. For that reason, we changed the switch in 06/2007 into a key button. The effect is that the
switch status of the pump in case of a voltage loss does not exist any more.
In order to keep the switch status, there is a jumper JP1 on the board by which you can determine
whether the pump shall restart automatically after a voltage loss or not.
With the bridge 2-3 (on), the pump restarts automatically.
With the bridge 1-2 (off), the pump does not restart again.
When delivered, the bridge is made between 1-2 (off), i.e. the pump does not restart after a voltage
loss.
Figure 4 Electronic board CSS-M..
14 CLOSING DOWN
NOTE!
The location for the gas conditioning unit must remain frost-free, even if the
unit has been switched off.
There are no special regulations to be observed if the gas conditioning unit CSS-M/W is to be closed
down for a short period of time.
In case of a long-term closing down, for example after a series of measurements has been completed,
it is recommended to purge the gas conditioning system with ambient air or inert gas. Under normal
conditions, the equipment needs only to be washed for 3 to 5 minutes. Condensate residues should
also be removed from the system.

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WARNING !
Aggressive condensate possible.
Wear protective glasses and proper protective clothing!
15 MAINTENANCE
Before carrying out any maintenance work, the specific safety instructions referring to the instalment
and the process must be observed!
WARNING !
Dangerous voltage. Before any maintenance work is carried out on
the gas conditioning system, put the main switch of the instrument
into position “0” and tear the mains plug off!
The frequency of the maintenance work depends on the operational process and can therefore only
be determined in each individual case.
All parts which require maintenance work are easily accessible and are installed on the front side of
the gas conditioning unit CSS-M/W. Only for any work on the gas sample pump, the case has to be
opened:
Replace the filter element of the fine filter FPF-2-0,3 GF in case the flow rate is to low or after
visible control.
NOTE!
In order to protect downstream analysers in case of a irruption of
condensate, always replace the humid filter element.
The hose of the condensate pump SR25.2 should be checked every six months and, if necessary,
replaced (see chapter 15.3.1);
The diaphragm of the sample gas pump N3 KPE should be checked every six months and, if
necessary, replaced.

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15.1 REPLACEMENT OF THE FILTER ELEMENT AND THE O-RING
NOTE!
In any case you open the filter, the filter element must be changed.
For changing the filter element and the O-ring:
Disconnect the mains voltage;
Unscrew the filter housing cover;
Exchange the filter element and/or O-ring. Pay attention to the correct insertion of the filter
element and the O-ring (the structural surface of the filter element must show to the front!).
Screw down the filter housing cover again.
O-ring
Filter element
Figure 5 Replacement of the filter element and the O-ring
15.2 DISMOUNTAGE OF THE SAMPLE GAS PUMP FOR EXAMINATION OR
MAINTENANCE
For dismounting the sample gas pump N3 KPE:
Disconnect the gas conditioning system from the mains voltage;
Unscrew the front panel and put it beside without detaching the piping and the wiring;
Loosen the 4 fastening screws of the mounting angle on which the pump is mounted;
Pull out the pump with mounting angle;
Examination and maintenance of the pump N3 KPE;
After examination and maintenance screw down the mounting angle again and mount the front
panel.
15.3 MAINTENANCE OF THE INTEGRATED PERISTALTIC PUMP TYPE SR 25.2
Pump hose, moving strap, pressure roller and springs are the only wearing parts of the pump. They
are easily to exchange.

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15.3.1 REPLACEMENT OF THE PUMP HOSE
WARNI NG!
Aggressive sample residues possible.
Wear protective glasses and proper protective clothing during
dismountage, repair or cleaning of the peristaltic pump!
NOTE!
In case you send the peristaltic pump to the M&C Service
Department, please indicate what medium has been lifted.
Before returning the pump to M&C, it must be cleaned from
dangerous or highly aggressive contaminations.




Figure 6 Replacement of the pump hose
Disconnect the gas conditioning system from the mains voltage;
Loosen the hose connections on the pump;
Press the moving strap on the recessed grips and turn the S-bar clockwise as far as the
limit stop;
Take out the moving strap and pull the old pump hose on the hose nozzles out of the
guides;
Press the pressure rollers and check whether there is any tension on the springs, if not,
exchange the pressure springs (see chapter 15.3.2);
Place the new pump hose with the hose nozzles into the guides of the moving strap ;
NOTE!
Only when using the original spare pump hose, the perfect
function is guaranteed.
Never grease the pump hose.
Before assembling the peristaltic pump, examine all parts for
contaminations and if necessary clean them.
Put the moving strap with the new hose completely into the dovetail guide of the pump
body; press the moving strap on the recessed grips and turn at the same time the S-bar 
anticlockwise as far as it locks into place;
Turn the pump on.

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15.3.2 CHANGE OF CONTACT PULLEYS AND SPRINGS
Switch off the mains;
Unscrew nuts of the pump head (metric wrench size 5.5) and remove snap ring from
motor shaft;
Figure 7 Disassembly of pump head and driver
Draw the pump head out of the motor shaft
Take driver out of the pump head
The removal of the springs (4 pcs.) away from the driver is easily possible without the aid of
any tools. For this take spring out of the groove near to the shaft bore.
Dismount roller axes and change contact pulleys. Take care that axes are not worn out by the
springs and have damaged the dent at the axes front end. In case of abrasion the axes have
to be changed (see Figure 8).
Figure 8 Check of axes and rolls
NOTE!
The springs may occur in different coulerings. This does not constitute
a quality defect. But make sure that the right spring strength is used.
This can be identified by the spring wire diameter. The „standard
version for Novoprene pump hoses“ (part no. 90 P 1010) has a diameter
of 1.1 mm (approx. 0.043”) and the strengthened version for FPM-,
Acidflex- or Masterflex-hoses“ (part no. 90 P 1015) has a diameter of 1.2
mm (approx. 0.047”).
The dent prevents
rotation of the axis
new
worn out

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NOTE!
At first delivery two different types of springs are mounted in the driver
(right and left springs). When spare springs are ordered, for simplified
storage only one type will be delivered (right spring) that can be
replaced without any problems and guarantees full functionality when
all four springs are replaced.
Make sure that contact pulleys roll easily on the axis. After remounting the axis with contact
pulley into the driver the spring has to be mounted as shown in Figure 8. Please pay attention
to the alignment of the dent.
Remounting happens in reverse order.
NOTE!
While mounting pay attention to the fit of ‘rotational axisdriver’ and
check that the plunged boss at the shaft bore points to the front of the
pump head.
Use genuine spare parts only!
15.3.3 CLEANING OF THE PUMP HEAD
We recommend to clean the single parts with a dry cloth. Principally, you should not use any
solvents for cleaning because they could affect the synthetic material. In case there is oil-free
compressed air available, the parts can be blown through.
WARNI NG!
Aggressive medium residues possible.
During dismountage, rapair or cleaning of the pump, wear
protective glasses and proper protective clothing!

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16 OPERATING OF THE INTEGRATED ELECTRONIC TEMPERATURE REGULATOR
During normal operation, the display of the temperature regulator shows the actual cooling
temperature.
Figure 9 shows the front view of the temperature regulator.
Figure 9 Front view of the temperature regulator
16.1 CHANGING THE SET VALUE
For changing the set value, you must press the P-button < 2 s. The set value adjusted at the factory
at 5 °C (41 °F) is shown. With both arrow keys, the set value can be set upwards or downwards.
However, this value should not be adjusted below +1° C (33.8 °F), otherwise you must expect a
freezing up of the heat exchanger. If you set the value above the ambient temperature, the cooler will
not work.