Buhler EGK 2-19 Owner's manual

Gas Analysis
Installation and Operation Instructions
Original instructions
Sample gas cooler
EGK 2-19 (+)
BE450010
05/2023
Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
Tel. [phone] / 49 89-0, Fax: [phone] / 49 89-20
E-Mail: [email protected]
Internet: www.buehler-technologies.com

Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
Tel. [phone] / 49 89-0, Fax: [phone] / 49 89-20
Internet: www.buehler-technologies.com
E-Mail: [email protected]
Read this instruction carefully prior to installation and/or use. Pay at-
tention particularly to all advises and safety instructions to prevent in-
juries. Bühler Technologies can not be held responsible for misusing
the product or unreliable function due to unauthorised modifications.
All rights reserved. Bühler Technologies GmbH 2023
Document information
Document No..........................................................BE450010
Version.........................................................................05/2023

EGK 2-19 (+)
Contents
1 Introduction.....................................................................................................................................................................................................................2
1.1 Intended use .........................................................................................................................................................................................................2
1.2 Types........................................................................................................................................................................................................................2
1.3 Scope of delivery..................................................................................................................................................................................................2
1.4 Ordering instructions.........................................................................................................................................................................................2
1.4.1 Gas cooler models with one heat exchanger ...............................................................................................................................2
1.4.2 Gas cooler models with two heat exchangers............................................................................................................................. 3
1.4.3 Gas cooler type with two heat exchangers in series..................................................................................................................4
2 Safety instructions ......................................................................................................................................................................................................... 5
2.1 Important advice................................................................................................................................................................................................. 5
2.2 General hazard warnings .................................................................................................................................................................................6
3 Transport and storage .................................................................................................................................................................................................. 7
4 Installation and connection ........................................................................................................................................................................................8
4.1 Installation site requirements.........................................................................................................................................................................8
4.2 Installation ............................................................................................................................................................................................................8
4.2.1 Peristaltic pump connector (optional)...........................................................................................................................................8
4.2.2 Connecting the heat exchanger.......................................................................................................................................................9
4.3 Electrical connections.......................................................................................................................................................................................10
4.4 Signal outputs.....................................................................................................................................................................................................11
5 Operation and control ................................................................................................................................................................................................ 12
5.1 Use of menu functions..................................................................................................................................................................................... 12
5.1.1 Overview of the menu items .......................................................................................................................................................... 13
5.1.2 Detailed description of the operational principle.................................................................................................................... 14
5.2 Description of menu functions ..................................................................................................................................................................... 14
5.2.1 Main menu........................................................................................................................................................................................... 14
5.2.2 Submenu ...............................................................................................................................................................................................15
6 Maintenance.................................................................................................................................................................................................................. 16
7 Service and repair..........................................................................................................................................................................................................17
7.1 Troubleshooting .................................................................................................................................................................................................17
7.2 Safety instructions............................................................................................................................................................................................ 18
7.3 Cleaning and removal of the heat exchanger........................................................................................................................................... 19
7.4 Replacing the fuse of the cooler....................................................................................................................................................................19
7.5 Replacing the hoses of the peristaltic pump (option) ........................................................................................................................... 20
7.6 Replacing the filter element (option) ......................................................................................................................................................... 20
7.7 Drying of the moisture detector (option).................................................................................................................................................. 20
7.8 Calibration of the moisture detector (option) ......................................................................................................................................... 20
7.9 Spare parts .......................................................................................................................................................................................................... 21
7.9.1 Spare parts and accessories ............................................................................................................................................................ 21
8 Disposal ...........................................................................................................................................................................................................................22
9 Appendices .....................................................................................................................................................................................................................23
9.1 Gas Cooler Technical Data ..............................................................................................................................................................................23
9.2 Technical Data - Options .................................................................................................................................................................................25
9.3 Heat exchanger..................................................................................................................................................................................................26
9.3.1 Heat exchanger description............................................................................................................................................................26
9.3.2 Heat exchanger overview ................................................................................................................................................................26
9.4 Performance curves..........................................................................................................................................................................................27
9.5 Dimensions .........................................................................................................................................................................................................28
10 Attached documents ...................................................................................................................................................................................................29
iBühler Technologies GmbHBE450010 ◦ 05/2023

EGK 2-19 (+)
1 Introduction
1.1 Intended use
This unit is intended for industrial use in gas analysis systems. It's an essential component for conditioning the sample gas to
protect the analysis instrument from residual moisture in the sample gas.
Please note the specifications in the data sheet on the specific intended use, existing material combinations, as well as pressure
and temperature limits.
1.2 Types
The device is delivered with different configurations. The part number given on the type plate informs you about the specific
configuration of your device.
1.3 Scope of delivery
– Cooler
– Product documentation
– Connection-/mounting accessories (optional)
1.4 Ordering instructions
1.4.1 Gas cooler models with one heat exchanger
The item number is a code for the configuration of your unit. Please use the following model key:
452 X X X X X X X X 0 Product characteristic
Gas cooler models (with 1 heat exchanger)
0 Wall mounting
1 19" rack installation
Supply voltage
1 115 V metric screw connections
2 230 V metric screw connections
3 115 V US screw connections
4 230 V US screw connections
Heat exchanger
0 0 without heat exchanger
1 1 Single stainless steel heat exchanger / (PTS and PTS-I)
1 2 Single glass heat exchanger / (PTG)
1 3 Single PVDF heat exchanger / (PTV and PTV-I)
Condensate drain
0 without condensate drain
1 1 CPsingle peristaltic pump with 90° angle hose connection 1)
3 1 CPsingle peristaltic pump with straight hose connection 1)
Filter
0 Without filter
1 1 filter installed
Moisture detector 2)
0 Without moisture detector
1 1 moisture detector installed
Optional 2)
0 Without option
1 With 4 - 20 mA analogue output for temperature
1) Each heat exchanger is equipped with one peristaltic pump. The supply voltage corresponds with that of the main unit.
2) The “moisture detector” option includes the option “4 - 20 mA analogue output”.
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1.4.2 Gas cooler models with two heat exchangers
The item number is a code for the configuration of your unit. Please use the following model key:
452 X X X X X X X X 0 Product characteristic
Gas cooler models (with 2 heat exchangers)
0 Wall mounting
1 19" rack installation
Supply voltage
1 115 V metric screw connections
2 230 V metric screw connections
3 115 V US screw connections
4 230 V US screw connections
Heat exchanger
0 0 without heat exchanger
2 1 2 single stainless steel heat exchangers / (PTS and PTS-I)
2 2 2 single glass heat exchangers / (PTG)
2 3 2 single PVDF heat exchangers / (PTV and PTV-I)
Condensate drain
0 Without condensate drain
2 2 CPsingle peristaltic pumps with 90° angle hose connection 1)
4 2 CPsingle peristaltic pumps with straight hose connection 1)
Filter
0 Without filter
1 1 filter installed
2 2 filters installed
Moisture detector 2)
0 Without moisture detector
1 1 moisture detector installed (only possible with 1 filter)
2 2 moisture detectors installed (only possible with 2 filter)
Optional 2)
0 Without option
1 With 4 - 20 mA analogue output for temperature
1) Each heat exchanger is equipped with one peristaltic pump. The supply voltage corresponds with that of the main unit.
2) The “moisture detector” option includes the option “4 - 20 mA analogue output”.
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1.4.3 Gas cooler type with two heat exchangers in series
The item number is a code for the configuration of your unit. Please use the following model key:
452 X X X X X X X X 0 Product characteristic
Gas cooler models (with 2 heat exchangers)
0 Wall mounting
1 19" rack installation
Supply voltage
1 115 V metric screw connections
2 230 V metric screw connections
3 115 V US screw connections
4 230 V US screw connections
Heat exchanger
0 0 Without heat exchanger
1 6 2 single glass heat exchangers/ (2x PTG-2)
1 7 2 single PVDF heat exchangers/ (2x PTV-2 or PTV-2-I)
Condensate drain
0 Without condensate drain
2 2 CPsingle peristaltic pumps with 90° angle hose connection 1)
4 2 CPsingle peristaltic pumps with straight hose connection 1)
Filter
0 Without filter
1 1 filter installed
Moisture detector 2)
0 Without moisture detector
1 1 moisture detector installed (only possible with 1 filter)
Optional 2)
0 Without option
1 With 4 - 20 mA analogue output for temperature
1) Each heat exchanger is equipped with one peristaltic pump. The supply voltage corresponds with that of the main unit.
2) The “moisture detector” option includes the option “4 - 20 mA analogue output”.
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2 Safety instructions
2.1 Important advice
Operation of the device is only permitted if:
– the product is used under the conditions described in the installation- and operation instruction, the intended application
according to the type plate and the intended use. In case of unauthorized modifications done by the user Bühler Technolo-
gies GmbH can not be held responsible for any damage,
– when complying with the specifications and markings on the nameplates.
– the performance limits given in the datasheets and in the installation- and operation instruction are obeyed,
– monitoring devices and safety devices are installed properly,
– service and repair is carried out by Bühler Technologies GmbH,
– only original spare parts are used.
This manual is part of the equipment. The manufacturer keeps the right to modify specifications without advanced notice. Keep
this manual for later use.
Signal words for warnings
DANGER
Signal word for an imminent danger with high risk, resulting in severe injuries or death if not avoided.
WARNING
Signal word for a hazardous situation with medium risk, possibly resulting in severe injuries or death if not
avoided.
CAUTION
Signal word for a hazardous situation with low risk, resulting in damaged to the device or the property or
minor or medium injuries if not avoided.
NOTICE
Signal word for important information to the product.
Warning signs
These instructions use the following warning signs:
Warns of a general hazard General information
Warns of voltage Unplug from mains
Warns not to inhale toxic gasses Wear respiratory equipment
Warns of corrosive liquids Wear a safety mask
Warns of explosive areas Wear gloves
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2.2 General hazard warnings
The equipment must be installed by a professional familiar with the safety requirements and risks.
Be sure to observe the safety regulations and generally applicable rules of technology relevant for the installation site. Prevent
malfunctions and avoid personal injuries and property damage.
The operator of the system must ensure:
– Safety notices and operating instructions are available and observed,
– The respective national accident prevention regulations are observed,
– The permissible data and operational conditions are maintained,
– Safety guards are used and mandatory maintenance is performed,
– Legal regulations are observed during disposal,
– compliance with national installation regulations.
– the device is protected from mechanical loads.
Maintenance, Repair
Please note during maintenance and repairs:
– Repairs to the unit must be performed by Bühler authorised personnel.
– Only perform conversion-, maintenance or installation work described in these operating and installation instructions.
– Always use genuine spare parts.
– Do not install damaged or defective spare part. If necessary, visually inspect prior to installation to determine any obvious
damage to the spare parts.
Always observe the applicable safety and operating regulations in the respective country of use when performing any type of
maintenance.
DANGER Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
DANGER Toxic, corrosive gas/condensate
Sample gas/condensate may be hazardous to health.
a) If necessary, ensure a safe gas/condensate discharge.
b) Always disconnect the gas supply when performing maintenance or repairs.
c) Protect yourself from toxic/corrosive gasses/condensate when performing mainten-
ance. Wear appropriate protective equipment.
DANGER Potentially explosive atmosphere
Explosion hazard if used in hazardous areas.
The device is not suitable for operation in hazardous areas with potentially explosive at-
mospheres.
Do not expose the device to combustible or explosive gas mixtures.
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3 Transport and storage
Only transport the product inside the original packaging or a suitable alternative.
The equipment must be protected from moisture and heat when not in use. It must be stored in a covered, dry and dust-free
room at a temperature of -20 °C to 60 °C (-4 °F to 140 °F).
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4 Installation and connection
4.1 Installation site requirements
The unit is only intended for use in enclosed areas in a 19” rack or wall-mounted. Adequate protection from the weather must be
provided when used outdoors.
Install the unit leaving enough room below the cooler to discharge the condensate. Leave room above for the gas supply.
Be sure to maintain the approved ambient temperature. Do not obstruct the convection of the cooler. The vents must have
enough room to the next obstacle. The distance must especially be a minimum of 10 cm on the air outlet side.
Ensure adequate ventilation when installing in enclosed housings, e.g. analyser cabinets. If the convection is inadequate, we re-
commend aerating the cabinet or installing a fan to lower the inside temperature.
4.2 Installation
Run the gas supply to the cooler with a downward slope. The gas inputs are marked in red and additionally labelled "IN".
If a large amount of condensate accumulates, we recommend using a condensate trap with automatic condensate drain. Our
condensate drains, 11 LD spec., AK 20 V, or model 165 SS, are suitable.
Glass vessels and automatic condensate drains are available for draining condensate for external mounting below the unit.
When using automatic condensate drains, the sample gas pump must be installed upstream of the cooler (pressure operation)
to ensure proper function of the condensate drain.
If the sample gas pump is located at the cooler outlet (suction operation), we recommend using glass condensate traps or peri-
staltic pumps.
Connecting the condensate drains
Depending on the material, build a connecting line with fittings and tubing or hose between the heat exchanger and condens-
ate drain. For stainless steel the condensate drain can be suspended directly to the connecting tube, for hoses the condensate
drain must be secured separately using a clamp.
The condensate drain can be mounted directly to the heat exchanger.
Condensate lines must always be installed with a slope and a minimum inside diameter of DN 8/10 (5/16”).
4.2.1 Peristaltic pump connector (optional)
Coolers ordered with attached peristaltic pump already have it installed and wired. Heat exchangers ordered at the same time
are already installed and connected to the peristaltic pump.
The ø6mm (0.24inch) hose nipple for the pump’s condensate outlet must be carefully and properly connected with a suitable
hose and hose clamp.
Versions with screw connections DN4/6 or 1/6”-1/4” are supplied with ferrule and knurled nut and must be carefully sealed
with appropriate hose.
NOTICE
Installing peristaltic pumps CPsingle / CPdouble limits the maximum permissible oper-
ating pressure in the system!
Operating pressure ≤ 1 bar
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4.2.2 Connecting the heat exchanger
The picture on the left shows the schematics for connecting two separate heat exchangers.
To minimise gas wash out in the cooler, the two (identical) heat exchangers must be operated in series (right picture). This
should be done as follows:
1. Gas inlet line to red gas inlet on heat exchanger 2 (pre-cooling).
2. Connection between gas outlet on heat exchanger 2 and the red gas inlet on heat exchanger 1 (after-cooling).
3. Attaching the final gas output line to the gas outlet on heat exchanger 1.
gas out gas in gas out gas in
condensate out condensate out
Heat exchanger 1 Heat exchanger 2
Gas cooler
(two single heat exchangers)
gas out
gas in
gas out
gas in
condensate out condensate out
Heat exchanger 1 Heat exchanger 2
Gas cooler +
(two heat exchangers in series)
The gas inputs are marked in red.
On glass heat exchangers the correct position of the seal is important when connecting the gas lines (see image). The seal con-
sists of a silicone ring with a PTFE sleeve. The PTFE side must face the glass thread.
Glass PTFE
Pay attention to the appropriate spanner size when selecting fittings for stainless steel heat exchangers.
PTS/PTS-I gas connections: SW 14 or 9/16”
PTS/PTS-I condensate out connections: SW 22
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4.3 Electrical connections
The operator must install an external separator for the device which is clearly assigned to this device.
This separator
– must be located near the device,
– must be easy for the operator to reach,
– must comply with IEC 60947-1 and IEC 60947-3,
– must separate all live conductors and the status output, and
– must not be attached to the power feed.
WARNING Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the device as a whole!
Insulation test
The device is equipped with extensive EMC protection. If insulation tests are carried out the electronic filter devices will be dam-
aged. All necessary tests have been carried out for all concerned groups of components at the factory (test voltage 1 kV or 1.5 kV
respectively, depending on the device).
If you wish to carry out the insulation test by yourself, please test only separate groups of components.
Disconnect the compressor, the fan, the heating or the peristaltic pumps, respectively, and then carry out the insulation tests.
Plug connection
This device has one EN 175301-803 plug each for the power supply and the signal output. If the lead is connected correctly, these
cannot be confused. Therefore please be sure to correctly reassemble the plugs after connecting the wires. Below you will find
the pin assignments, with the numbers corresponding to those on the plugs:
The supply line cross-sections must be suitable for the rated current. Use a maximum line cross-section of 1.5mm² (AWG16) and
a cable diameter of 8-10mm (0.31-0.39 inch).
pin assignment power supply
Fig.1: A100048 Cooler electric supply
The supply voltage is 230 VAC 50/60 Hz or 115 VAC 50/60 Hz (please note type plate!). The mains supply must be protected with
10 A. The clamping area has a diameter of 8-10 mm.
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4.4 Signal outputs
At the back of the unit is a 12-pin PHÖNIX connector which provides various status signals. The maximum switching power of
the alarm outputs is 250VAC/DC, 1A each.
An alarm is triggered if the temperature of the cooler is outside the specified limits. It does not indicate if the alarm was
triggered due to excess temperature or insufficient temperature.
When the moisture detector (optional) is installed, an alarm is activated if moisture is still present in the prepared sample gas or
a cable break is detected. It does not differentiate if the alarm / cable break was triggered by moisture detector 1 or 2. This in-
formation, however, appears in the display.
If the option “temperature signal” is built in, the unit has a signal to indicate the actual cooler temperature. The option “Mois-
ture detector” includes the option “Temperature signal”.
Fig.2: 12-pin PHÖNIX connector
A Moisture detector status (residual moisture) (option) C Analogue temperature output (4-20 mA) (optional)
B Cooler status (excess or insufficient temperature) D Equipment dimensions: Connection for the 4-20 mA
signal line shielding
Description of signal outputs
Function / contact type Description
Regard-
ing B)
internal changeover contact:
max. 250 VAC/DC, 1A
the following device statuses can be
indicated via two switching outputs:
Contact between 5 and 6 closed (alarm)
– No mains voltage and/or actual temper-
ature outside the alarm thresholds
Contact between 4 and 5 closed (ok)
– Mains voltage attached + actual temper-
ature within the alarm thresholds
Moisture detector option (includes temperature signal option)
Regard-
ing A)
internal changeover contact:
max. 250 VAC/DC, 1A
the following device statuses can be
indicated via two switching outputs:
Contact between 1 and 2 closed (alarm)
– The moisture detector registers residual
humidity in the sample gas or cable
break: Error message
Contact between 2 and 3 closed (ok)
– no residual moisture in measuring gas /
no cable break
Temperature signal option
Regard-
ing C)
4-20mA analogue output
(RLoad<600Ω)
Signalling of actual temperature
(please use shielded cables)
TCooler = -20 °C -> 4 mA
TCooler = 5 °C -> 9.71 mA
TCooler = 50 °C -> 20 mA
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5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
After switching on the cooler the block temperature will be displayed. The display will flash until the block temperature has
reached the preset target value (± adjustable alarm range). The status contact is in the Alarm position.
Once the target temperature range has been reached, the temperature will continuously be displayed and the status contact
switches over.
If the display flashes during operation or an error message appears, please refer to bullet “Troubleshooting”.
Please refer to the data sheet for performance data and maximum ratings.
5.1 Use of menu functions
Overview of the operational principal:
Use this short description if you have experience with the device.
Operation is carried out by only the keys with the following functions:
Key Function
– Switch from measurement display to main menu
– Selection of the display menu item
– Accepting the changed value or selection
– Switch to the upper menu item
– Increase of the value of switching the selection
– Temporary display of the alternative measurement display (if option is installed)
– Switch to lower menu item
– Decrease of the value of switching the selection
– Temporary display of the alternative measurement display (if option is installed)
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5.1.1 Overview of the menu items
Displayed is the block temperature with a resolution of 0.5 °C / 0.75 °F. By pressing the Enter button brings the
display to the Main Menu. The unit of temperature is adjustable in the menu Global Settings (Celsius or Fahrenheit).
Display of current temperature and operating state
____ ____ ____
Main Menu Submenu Setting range store value
____
Display ____
Current temperature
____
Parameter
____
Parameter
____
Temperature
____
Display
____
Alarm high
____
Parameter
____
Alarm Low
____
H2O
____
Parameter
____
Top Settings
____
Exit
E219
____
Parameter
____
HSens ____
Parameter
____
Exit
adjust value
Cooler display Set temperature
Alarm hysteresis
wait 5s: no storage
Upper alarm
Cooler temperature
Lower alarm
Alarm hysteresis
Moisture detector calibration
Exit Submenu
C - F
Global Settings
Exit Main Menu
Adjust the set point:
2°C...20°C / 35.6°F...68°F
Set the upper alarm threshold above
setpoint: tEMP 1°C...7°C / 1.8°F...12.6°F
Set the lower alarm threshold below
setpoint: tEMP -1°C...-3°C / -1.8...-5.4F
If moisture detector is installed:
calibration key
If moisture detector is installed:
adjust sensitivity: High, Low
Set unit Celsius or Fahrenheit
tEMP
A Hi
A Lo
h2o
hSEn
E
HiLo
rSt
___
___
____
C
toP
E
Moisture detector sensitivity
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5.1.2 Detailed description of the operational principle
The detailed description will guide you through the menu step by step.
Connect the unit to the power supply and wait for the startup procedure to complete. At first the software version im-
plemented on the unit will be displayed for a brief period. The unit will then switch directly into measured value dis-
play.
Pressing the button will take you from display mode to the main menu. (The control will continue running whilst in
menu mode.)
Use these buttons to navigate the main menu.
After confirming a main menu item the associated submenu will open
Here you can configure operating parameters:
Cycle through the submenu to configure the parameters,
then confirm the menu item to be changed.
You can now set values within specific limits.
After confirming the value the system will save it. This will automatically return you to the submenu.
If no button is pushed for approx. 5 s, the unit will automatically return to the submenu. Changes to values will not be
saved.
The same applies to the sub- and main menu. The system will automatically return to display mode without saving
the (last) value changed. Parameters which were previously changed and saved will be retained and not reset.
NOTICE!After saving values with the Enter key they will be applied to the control.
ETo exit the main or submenu, select menu item E (Exit).
5.2 Description of menu functions
5.2.1 Main menu
Cooler
This item allows all relevant settings for the cooler. In the corresponding submenu nominal temper-
ature and alarm limits may be selected.
Globale settings (ToP Settings)
Selection of the global temperature unit, either degree Celsius (C) or degree Fahrenheit (F).
Note: This menu item has no sub-item. The temperature unit is directly selected.
Exit main menu
Display → E
Selecting this will return you to display mode.
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5.2.2 Submenu
Cooler -> nominal temperature (temperature)
This setting determines the nominal temperature for the cooler temperature. The value can be set to
a range from 2 °C (35.6 °F) to 20 °C (68 °F).
Note: The standard value at delivery is 5 °C (41 °F) (unless otherwise agreed). If the temperature is changed
the indicator may blink, until the new operating range has been reached.
Cooler -> upper alarm limit (alarm high)
Here you can set the upper threshold for the visual signal and the alarm relay. The alarm limit is set
to a range from 1 °C (1.8 °F) to 7 °C (12.6 °F) in relation to the cooler temperature setting.
Note: The standard value at delivery is 3 °C (5.4 °F) (unless otherwise agreed).
Cooler -> lower alarm limit (alarm low)
Here you can set the lower threshold for the visual signal and the alarm relay. The alarm limit is set
to a range from -1 °C (-1.8 °F) to -3 °C (-5.4 °F) in relation to the cooler temperature setting.
Note: The standard value at delivery is -3 °C (-5.4 °F) (unless otherwise agreed).
Cooler -> calibrate moisture detector (h2o)
If a moisture detector is installed, calibration can now be performed. To do so, the unit must be
flushed with dry gas.
Note: Calibration was performed at the factory using ambient air. After replacing the moisture detector a
calibration is again required.
Cooler -> moisture detector sensitivity (hSens)
If moisture detectors are installed, the sensitivity can be reduced here. Select between high and low.
Note: At delivery the sensitivity is set to high. The moisture detector is therefore sensitive.
Exit submenu
Selecting this item returns to the main menu.
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6 Maintenance
If the cooler is delivered in basic configuration, no special maintenance is necessary.
Nevertheless, depending on the configuration different options or accessories may be installed. In this case, follow the mainten-
ance schedule in regular intervals.
–Option peristaltic pump: Checking the hoses
–Option filter: Checking the filter element
–Option moisture detector: Calibrating the moisture detector
During maintenance, remember:
– The equipment must be maintained by a professional familiar with the safety requirements and risks.
– Only perform maintenance work described in these operating and installation instructions.
– Observe the respective safety regulations and operating specifications when performing any type of maintenance.
– Always use genuine spare parts.
DANGER Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
DANGER Toxic, corrosive gas/condensate
Sample gas/condensate may be hazardous to health.
a) If necessary, ensure a safe gas/condensate discharge.
b) Always disconnect the gas supply when performing maintenance or repairs.
c) Protect yourself from toxic/corrosive gasses/condensate when performing mainten-
ance. Wear appropriate protective equipment.
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7 Service and repair
This chapter contains information on troubleshooting and correction should an error occur during operation.
Repairs to the unit must be performed by Bühler authorised personnel.
Please contact our Service Department with any questions:
Tel.: [phone] or your agent
For further information about our services and customised maintenance visit http://www.buehler-technologies.com/service.
If the equipment is not functioning properly after correcting any malfunctions and switching on the power, it must be inspected
by the manufacturer. Please send the equipment inside suitable packaging to:
Bühler Technologies GmbH
- Reparatur/Service -
Harkortstraße 29
40880 Ratingen
Germany
Please also attach the completed and signed RMA decontamination statement to the packaging. We will otherwise be unable to
process your repair order.
You will find the form in the appendix of these instructions, or simply request it by e-mail:
[email protected].
7.1 Troubleshooting
Problem / Malfunction Possible cause Action
No display – Mains voltage interrupted – Connect to mains; check the plug is correctly
inserted
– Fuse defective – Check fuse and replace, if necessary
Cooler doesn’t start up – Housing temperature too high – Allow to cool down and ensure adequate
ventilation
Display flashes if:
– Excess temperature – Operating point not yet reached – Wait (max. 20 min)
– Cooling outlet too long despite the cooler
running
– Be sure the vents are not covered (heat
buildup)
– Flow rate / dew point / gas temperature too
high
– Maintain limits / install pre-separator
– Installed fan stopped – Check and replace if necessary
– Insufficient temperature – Faulty control – Send in cooler
Condensate inside the gas
outlet
– Condensate trap full – Empty condensate trap
– Valve inside the automatic condensate drain
may be stuck
– Flush in both directions
– Cooler overloaded – Maintain limits
Reduced gas flow rate – Gas circuit clogged – Uninstall and clean heat exchanger
– if necessary, replace filter element
– Condensate outlet iced over – Send in cooler
17Bühler Technologies GmbHBE450010 ◦ 05/2023

EGK 2-19 (+)
Error messages on the display
The display alternates between the temperature and error message.
Problem / Malfunction Possible cause Action
Error 01 – Broken wire – Temperature sensor defective: Send in cooler
Error 02 – Short circuit – Temperature sensor defective: Send in cooler
Moisture detector 1 or 2 reports alarm (only if option installed)
NOTICE!If the moisture detector was triggered, it must then be dried
1h2o
2h2o
– Cooler overloaded, flow rate / dew point /
gas temperature too high
– Maintain limits / install pre-separator
– Cooling output too long despite the cooler
running
– Be sure not to cover the ventilation slots (heat
buildup); maintain limits
– Condensate trap full – Empty condensate trap
– Water penetrating from water bag – Observe delivery rate of peristaltic pumps
– Install condensate drain with downward slope
Error 1bw
Error 2bw
– Cable break in the moisture detector connec-
tion line
– Check connection line and plug-in connection
7.2 Safety instructions
– The device must be operated within its specifications.
– All repairs must be carried out by Bühler authorised personnel only.
– Only perform modifications, servicing or mounting described in this manual.
– Only use original spare parts.
DANGER Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
DANGER Toxic, corrosive gas/condensate
Sample gas/condensate may be hazardous to health.
a) If necessary, ensure a safe gas/condensate discharge.
b) Always disconnect the gas supply when performing maintenance or repairs.
c) Protect yourself from toxic/corrosive gasses/condensate when performing mainten-
ance. Wear appropriate protective equipment.
18 Bühler Technologies GmbH BE450010 ◦ 05/2023