Lauda ECO SILVER, E 4 S, E 10 S, E 20 S, S User guide

Operation manual

ECO SILVER

Heating and cooling thermostats with control head SILVER

Immersion thermostat
ECO SILVER

Heating thermostats
E 4 S, E 10 S, E 20 S, E 25 S, E 40 S,
ET 6 S, ET 12 S, ET 15 S, ET 20 S

Cooling thermostats
RE 415 S, RE 415SW, RE 420 S, RE 630 S,
RE 1050 S, RE 1225 S, RE 2025 S

Version 09/2021 l Read the instructions before starting work!

2 / 123 ECO Silver 09/2021

Manufacturer
LAUDA DR. R. WOBSER GMBH & CO. KG
Laudaplatz 1
97922 Lauda-Königshofen
Germany
Phone: [phone]
Fax: [phone]
E-Mail [e-mail]
Internet http://www.lauda.de

Translation of the original operation manual YACE0087
replaces version 10/2019 i, 05/2019 h11/2018 g, 05/2017 f, 11/2016 e1, 08/2016 b2, 12/2014b1,
08/2011 a1

Valid from:
Software of Control System Version 1.54
Software of Protection System Version 1.43
Software of Chilling System Version 1.37
Software Analog IO module Version 3.14
Software Serial IO module Version 3.22
Software Digital IO module Version 3.14
Software Solenoide valve Version 3.06
Software EtherCAT module Version 1.06
Software Ethernet module Version 1.23

09/2021 ECO Silver 3 / 123

Table of contents

1 SAFETY ........................................................................................................................................................................................... 6

1.1 SAFETY INFORMATION ............................................................................................................................................................ 6

1.2 GENERAL SAFETY ..................................................................................................................................................................... 7

1.3 SPECIAL SAFETY INFORMATION .............................................................................................................................................. 8

2 GENERAL REMARKS .............................................................................................................................................................. 10

2.1 DESCRIPTION OF THE DEVICE.............................................................................................................................................. 10

2.2 INTENDED APPLICATION ...................................................................................................................................................... 10

2.3 USE OTHER THAN THAT INTENDED ...................................................................................................................................... 10

2.4 RESPONSIBILITY OF THE OPERATING BODY - SAFETY INFORMATION ................................................................................ 10

2.5 MATERIALS ............................................................................................................................................................................ 10

3 DEVICE DESCRIPTION .......................................................................................................................................................... 11

3.1 DEVICE TYPES ....................................................................................................................................................................... 11

3.2 PUMP ..................................................................................................................................................................................... 11

3.3 PROGRAMMER ..................................................................................................................................................................... 11

3.4 INTERFACES .......................................................................................................................................................................... 11

3.5 INTERFACE MODULES (ACCESSORIES) ............................................................................................................................... 12

3.6 CHILLER ................................................................................................................................................................................ 12

4 OPERATING AND FUNCTIONAL CONTROLS ............................................................................................................... 13

5 TRANSPORT AND UNPACKING ......................................................................................................................................... 19

6 BEFORE PUTTING THE DEVICE INTO OPERATION .................................................................................................... 21

6.1 ASSEMBLY AND SITING ......................................................................................................................................................... 21

6.2 CONNECTION OF EXTERNAL CONSUMERS ......................................................................................................................... 26

6.3 FILLING AND EMPTYING ........................................................................................................................................................ 29

6.4 HEAT TRANSFER LIQUIDS, COOLING WATER AND HOSES .................................................................................................. 31

6.5 COOLING OF HEATING THERMOSTATS ................................................................................................................................ 35

6.6 FIRST SWITCH-ON ................................................................................................................................................................ 35

6.7 INSTALLATION OF MODULES ................................................................................................................................................ 36

7 OPERATION .............................................................................................................................................................................. 38

7.1 SWITCHING ON ..................................................................................................................................................................... 40

7.2 MENU STRUCTURE ................................................................................................................................................................ 41

7.3 DISPLAY REPRESENTATION .................................................................................................................................................. 42

7.3.1 Basic window ............................................................................................................................................................... 42

7.3.2 Menu window .............................................................................................................................................................. 43

7.3.3 Entry window .............................................................................................................................................................. 44

7.4 BASIC SETUP.......................................................................................................................................................................... 44

7.4.1 Setting the overtemperature switch-off point T

................................................................................................. 44

max

7.4.2 Setting the temperature set-point value.................................................................................................................. 45

7.4.3 Setting the pump level ............................................................................................................................................... 46

7.4.4 Activating the "Standby" operating state ................................................................................................................. 46

7.4.5 Defining temperature limits ...................................................................................................................................... 47

7.4.6 Selecting the menu language .................................................................................................................................... 47

8 MAINTENANCE........................................................................................................................................................................ 48

4 / 123 ECO Silver 09/2021

8.1 ALARMS, WARNINGS AND ERRORS ..................................................................................................................................... 48

8.1.1 Overtemperature protection: Alarm and checking ................................................................................................ 48

8.1.2 Low level: Alarm and checking .................................................................................................................................. 49

8.2 DEVICE STATUS..................................................................................................................................................................... 50

8.2.1 Store for errors, alarms and warnings ....................................................................................................................... 50

8.2.2 Device data ................................................................................................................................................................. 50

8.2.3 Software version ........................................................................................................................................................ 51

8.2.4 Displaying and changing the device type ................................................................................................................. 51

8.2.5 Displaying serial numbers .......................................................................................................................................... 51

8.3 SERVICING ............................................................................................................................................................................ 52

8.3.1 Cleaning ...................................................................................................................................................................... 52

8.3.2 Servicing intervals ...................................................................................................................................................... 53

8.3.3 Inspecting the heat transfer liquid ............................................................................................................................ 53

8.3.4 Cleaning the condenser ............................................................................................................................................ 54

8.3.4.1 Air-cooled condenser ....................................................................................................................................... 54

8.3.4.2 Water-cooled condenser ................................................................................................................................. 54

8.4 FAULT FINDING .................................................................................................................................................................... 56

8.5 DISPOSAL INFORMATION .................................................................................................................................................... 57

8.5.1 Disposal of the refrigerant ........................................................................................................................................ 57

8.5.2 Disposal of the packaging.......................................................................................................................................... 57

8.6 TAKING THE DEVICE OUT OF SERVICE ................................................................................................................................. 57

8.7 ORDERING REPLACEMENT PARTS / LAUDA SERVICE ...................................................................................................... 58

9 ACCESSORIES ......................................................................................................................................................................... 59

10 TECHNICAL DATA AND GRAPHS...................................................................................................................................... 61

11 DECLARATION OF CONFORMITY.................................................................................................................................... 70

12 INDEX ......................................................................................................................................................................................... 72

A OTHER SETTINGS ................................................................................................................................................................... 77

A.1 RESETTING TO FACTORY SETTINGS ...................................................................................................................................... 77

A.1 SETTING THE VOLUME OF THE ACOUSTIC SIGNALS ............................................................................................................ 78

12.1 SETTING THE CHILLER........................................................................................................................................................... 78

12.2 SETTING THE DISPLAY BRIGHTNESS ..................................................................................................................................... 79

12.3 DEFINING THE STARTING MODE (AUTOSTART) .................................................................................................................. 79

12.4 LIMITING THE MAINS CURRENT CONSUMPTION ................................................................................................................. 79

12.5 ENTERING THE OFFSET OF THE DISPLAYED TEMPERATURE (CALIBRATION) ..................................................................... 80

12.6 RESTORING THE FACTORY SETTING OF THE INTERNAL TEMPERATURE SENSOR (FACTORY CALIBRATION)..................... 81

12.7 KEY LOCK .............................................................................................................................................................................. 82

B LIST OF "ALARM AND WARNING CODES" ..................................................................................................................... 83

C EXTERNAL CONTROL ........................................................................................................................................................... 87

B.1 ACTIVATING EXTERNAL CONTROL (EXTERNAL PT100) ..................................................................................................... 87

C.1 SHOW THE SELECTED CONTROL VARIABLE (EXTERNAL TEMPERATURE) ON THE DISPLAY ............................................... 87

D.1 SETPOINT OFFSET OPERATING MODE (DIFF.SET/ACTUAL) ................................................................................................ 88

D PROGRAMMER ....................................................................................................................................................................... 89

12.8 PROGRAMMING EXAMPLE ................................................................................................................................................... 89

12.9 CREATING AND EDITING A PROGRAM ................................................................................................................................. 90

09/2021 ECO Silver 5 / 123

12.10 STARTING THE PROGRAM ..................................................................................................................................................... 92

12.11 INTERRUPTING, CONTINUING OR TERMINATING THE PROGRAM ....................................................................................... 92

12.12 DEFINING THE NUMBER OF PROGRAM LOOPS (LOOPS) ................................................................................................... 93

E CONTROL PARAMETERS ..................................................................................................................................................... 94

12.13 INTERNAL CONTROL VARIABLE (INTERNAL TEMPERATURE SENSOR) ................................................................................ 94

12.14 EXTERNAL CONTROL VARIABLE ........................................................................................................................................... 95

E.1.1 Setting the correcting quantity limit ......................................................................................................................... 96

E.1.2 Procedure for setting the control parameters for external control ....................................................................... 97

F INTERFACE MODULES .......................................................................................................................................................... 98

12.15 MENU STRUCTURE OF THE MODULES ................................................................................................................................. 98

12.16 ANALOG MODULE ................................................................................................................................................................ 99

12.17 RS 232/485 INTERFACE MODULE ................................................................................................................................. 100

F.1.1 Connecting lead and interface test RS 232 ........................................................................................................ 100

F.1.2 RS 232 protocol ..................................................................................................................................................... 101

F.1.3 RS 485 connecting lead ........................................................................................................................................ 101

F.1.4 RS 485 protocol ..................................................................................................................................................... 102

12.18 LIBUS MODULE .................................................................................................................................................................. 102

12.19 PT100/LIBUS MODULE .................................................................................................................................................... 103

12.20 USB INTERFACE ................................................................................................................................................................ 104

F.1.5 Description .............................................................................................................................................................. 104

F.1.6 Installation of the USB driver ................................................................................................................................. 104

F.1.7 Connecting the thermostat to the PC .................................................................................................................. 105

F.1.8 Where is the ECO Virtual COM Port? ................................................................................................................ 108

12.21 COMMANDS AND ERROR MESSAGES APPLICABLE TO THE RS 232/485 INTERFACE MODULE AND TO THE ETHERNET

INTERFACE ......................................................................................................................................................................... 110

F.1.9 Interface write commands (data issued to the thermostat) ................................................................................ 110

F.1.10 Interface read commands ....................................................................................................................................... 111

F.1.11 Interface error messages ........................................................................................................................................ 113

F.1.12 Driver software for LABVIEW® ........................................................................................................................... 113

12.22 CONTACT MODULE ........................................................................................................................................................... 113

F.1.13 Contact module LRZ 914 with 1 input and 1 output ......................................................................................... 113

F.1.14 Contact module LRZ 915 with 3 inputs and 3 outputs...................................................................................... 115

6 / 123 ECO Silver 09/2021

Danger!

Type and source

Consequences of non-compliance

 Action 1
 Action ...

"DANGER" indicates an immediate dangerous situation which – if the safety requirements
are ignored – may result in fatal or severe, irreversible injuries.

Warning!

Type and source

Consequences of non-compliance

 Action 1
 Action ...

"WARNING" indicates a possible dangerous situation which – if the safety requirements are
ignored – may result in fatal or severe, irreversible injuries.

Caution!

Type and source

Consequences of non-compliance

 Action 1
 Action ...

"CAUTION" indicates a possible dangerous situation which – if the safety requirements are
ignored – may result in slight, reversible injuries.

Notice

Type and source

Consequences of non-compliance

 Action 1
 Action ...

"NOTICE" warns of possible property or environmental damage.



Reference

Refers to further information in other sections.

1 Safety

1.1 Safety information

09/2021 ECO Silver 7 / 123

Read through the operating instructions carefully. They contain important information for working with this device. If
you have any queries, please contact our Service Department ( 8.6).

Follow all the directions in these operating instructions. Only in this way is the correct procedure ensured when work­ing with the device.

 Make sure that the device is only operated by instructed specialist personnel.

 Never operate the device without heat transfer liquid.

 Never operate the device,

 it is damaged,
 if it is leaking,
 the mains cable is damaged.

 Switch off the device and withdraw the mains plug

 when carrying out service or repair work,
 when moving the device,
 when installing or removing modules or accessories
 in case of danger.

 Do not make technical modifications to the device. Infringements in this respect invalidate the warranty.

 Have service and repair work carried out only by specialists.

 Follow the safety information in the following sections and read it through carefully.

The devices are not designed for use in medical applications in accordance with DIN EN 60601-1 and IEC 601-1!

Classification in accordance with EMC requirements

Device

Immunity requirements

Emissions Class

Customer power supply

Heating thermostat

ECO Silver

Table 1* in accordance

with

DIN EN 61326-1

Emissions Class B

in accordance with CISPR 11

Only for EU

Domestic connection value

≥ 100 A

Heating thermostat

ECO Silver

Table 1* in accordance

with

DIN EN 61326-1

Emissions Class B

in accordance with CISPR 11

Worldwide

No limitation

Device

Immunity requirements

Emissions Class

Customer power supply

Cooling thermostat

ECO Silver

Table 1* in accordance

with

DIN EN 61326-1

Emissions Class B

in accordance with CISPR 11

Only for EU

Domestic connection value

≥ 100 A

Cooling thermostat

ECO Silver

Table 1* in accordance

with

DIN EN 61326-1

Emissions Class B

in accordance with CISPR 11

Worldwide

No limitation

1.2 General safety

*Devices for use in basic electromagnetic environment

8 / 123 ECO Silver 09/2021

Instructions for Class A digital device, USA:
“Note: This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part

15 of the FCC (Federal Communication Commission) Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense”.

Instructions for Class A digital device, Canada:
“This Class A digital apparatus complies with Canadian ICES-003” (ICES = Interference Causing Equipment Stand-

ards).

The use of the thermostat is only admissible under the following conditions:

 The siting surface must be impervious, flat, non-slip and non-combustible. Do not position the thermostat at the

edge of the bench or table.

 Keep to the specified wall spacing ( 6.1).

 Protect the device from dripping or condensing water.
 Do not store any liquids or combustible objects above the device.
 Do not work with flammable liquids in the direct vicinity of the device.

 Only connect the devices to earthed mains sockets which are freely accessible.

 At higher operating temperatures parts of the bath cover can take on surface temperatures of over 70 °C. There is a

danger of burns.

 Only use suitable hoses ( 6.4).

 Ensure that the hoses are not kinked during operation.

 Check the hoses at certain inspection intervals ( 8.3.2) for material fatigue.

 Secure hoses against slippage by using hose clips. Avoid kinking the hoses.

 Hoses with hot heat transfer liquid and other hot parts must not come into contact with the mains cable.

 When using the thermostat as a circulation thermostat, hot liquid can escape due to hose fracture and become a

danger to personnel and materials.

 Irritant vapors may be generated depending on the heat transfer liquid used and the operating mode.

 Ensure sufficient extraction of the vapors.
 Use the bath cover.

 Carefully mount the immersion thermostat on the bath vessel.

 Only use bath vessels which are suitable for the intended operating temperatures.

 When filling, set the overtemperature switch-off point according to the heat transfer liquid used.

 When changing the heat transfer liquid from water to other liquids for temperatures above 100 °C, carefully remove

all residues of water including from the hoses and consumers, otherwise there is a risk of scalding due to delay in boil­ing.
Also unscrew the blind plugs from the pump outputs and inputs and blow through all pump outputs and inputs with
compressed air.

1.3 Special safety information

09/2021 ECO Silver 9 / 123

 Use the cooling coil with cooling water only at operating temperatures below 100 °C. At higher temperatures there

is danger of hot steam forming.

 Have repairs carried out only by specialists.

 Keep to all the service and maintenance intervals ( 8.3.2).

 Take note of all safety instructions on the device and in these operating instructions.

Applicable only to water-cooled devices:
 Secure the return hose of the water cooling in the discharge area in order to prevent the hose sliding off uncontrolla-

bly, also during pressure surges.

 Secure the return hose of the water cooling in the discharge area so that it is not possible of hot cooling water to

splash out.

 Avoid kinking or crushing the return hose of the water cooling. Excessive pressure can cause the cooling water hoses

to tear and hot water to escape.

 To avoid damage due to a leak in the cooling water system we recommend the use of a water leakage sensor with

water cut-off.

10 / 123 ECO Silver 09/2021

This device is a laboratory thermostat. It is obtainable as:

 Immersion thermostat (optionally with cooling coil), which is used for heating (and optionally for cooling) liq-

uids in existing vessels.

 Heating bath and circulation thermostat, designated in the following as a "heating thermostat", which is used

for heating liquids.

 Heating bath and circulation thermostat (a cooling/heating thermostat), also designated in the following as a

"cooling thermostat", which is used for cooling and heating liquids.

This LAUDA thermostat is manufactured exclusively for cooling/heating liquid baths. In the case of the immersion
thermostat the baths used must have methods of secure mounting.

 The device may only be put into operation in suitable interior rooms.
 Operation up to a height of 2000 m above sea level is admissible.

The devices must only be operated as intended and under the conditions stated in these operating instructions. Any
other operating mode is not regarded as used as intended.

The thermostat may only be operated with the following heat transfer liquids:

 Aqua 90
 Kryo 20
 Kryo 30

 Kryo 51
 Therm 160
 Therm 180

 Therm 250
 Decalcified water

Take into account the properties of the heat transfer liquids. ( 6.4).

The device must not be used:

 in areas subject to explosion hazards
 when sited outdoors
 with combustible or highly flammable gases
 for heating or cooling foodstuffs.

The operating body is responsible for the qualifications of the operating personnel.

 The thermostat must only be configured, installed, maintained and repaired by specialist personnel.
 Persons operating the device must be instructed in their work by a specialist.
 Make sure that specialist personnel and operators have read and understood the operating instructions.
 The device must be used as intended ( 2.2).

All parts that are exposed to heat transfer liquid are manufactured from high-quality materials adapted to withstand
the operating temperature. High-quality stainless steel, brass, bronze, high-quality heat-resistant plastics and elasto­mers are used.

2 General remarks

2.1 Description of the device

2.2 Intended application

2.3 Use other than that intended

2.4 Responsibility of the operating body - safety information

2.5 Materials

09/2021 ECO Silver 11 / 123

Heating thermostats
The type designation of the LAUDA heating thermostats is composed of the prefix E for ECO, the approximate bath

volume in liters and an S for the SILVER device variant.
Example: E 10 S is a heating thermostat with a maximum bath volume of 10 liters in the SILVER device variant.
With the heating thermostats with a transparent bath there is the prefix of ET for the ECO transparent bath, followed

by the bath volume in liters and an S for the device variant SILVER.

Example: E 6 S is a heating thermostat with a transparent bath with a maximum bath volume of 6 liters in the SILVER
device variant.

Cooling thermostats
The type designation of LAUDA cooling thermostats is composed of the prefix R (to identify the cooling thermostat:

Refrigerated), an E for ECO, the bath volume in liters, the minimum attainable temperature (without arithmetical sign)
and an S for the device variant SILVER.

Example: RE 420 S is a heating thermostat with a maximum bath volume of 4 liters and a minimum temperature of ­20 °C in the SILVER device variant. Where applicable the type designations are supplemented by a W for "water­cooled".

All devices are equipped with a pressure pump. The pump has an output with a pivotable outflow elbow. An additional
output is used for internal bath circulation. By switching the selector at the front on the control head, the flow can be
manually selected or divided between the two outputs.

Using the operating menu, one of six flow-rate levels can be selected for the pump. For thermostats with a small bath a
power level of 1 to 3 is practicable.

When operated as a circulation thermostat with an external consumer, a higher power level is practicable to keep the
temperature difference between the bath and external consumer small even a higher temperatures.

The pump connection of the outflow can be closed without any detrimental effects on the pump.

Pump characteristics ( 10)

The devices are equipped with a programming function ( D).

In the basic version the devices are equipped with a USB interface. This enables, for example, the connection of a PC
and operation with the thermostat control software Wintherm Plus. In addition software updates are possible via the
USB interface. The connecting lead is not included in the items supplied with the thermostat. When connecting up,
make sure the correct plug is used.

3 Device description

3.1 Device types

3.2 Pump

3.3 Programmer

3.4 Interfaces

12 / 123 ECO Silver 09/2021

The devices can be supplemented with further interface modules which are connected to the rear of the control head in
two module slots ( F) and are inserted.
The following modules are currently available:

1. Analog Module (LAUDA catalogue no. LRZ 912) with two inputs and two outputs on a six-pole DIN

socket. The inputs and outputs can be set independently of one another as a 0 – 20 mA, 4 – 20 mA or
0 – 10 V interface, 20 V is brought out on the socket as a power supply for an external sensor with evalua­tion electronics.

2. RS 232/485 Interface Module (LAUDA catalogue no. LRZ 913) with nine-pole SUB-D socket. Electri-

cally isolated using optocouplers. Using the LAUDA instruction set, extensively compatible to Proline, Pro­line Kryomat, Integral XT and Integral T series. The RS 232 interface can be connected using a 1:1 con­tacted cable (LAUDA catalogue no. EKS 037) directly to the PC.

3. Contact Module (LAUDA catalogue no. LRZ 914) with connector to NAMUR NE28. Range of functions

as for LRZ 915, but only one output and one input on each of two DIN sockets. Coupling socket, 3-pole
(LAUDA catalogue no. EQD 047) and coupling plug 3-pole (LAUDA catalogue no. EQS 048).

4. Contact Module (LAUDA catalogue no. LRZ 915) on a 15-pole SUB-D socket. With three relay contact

outputs (changeover, max. 30 V/0.2 A) and three binary inputs for control via external voltage-free con­tacts. Plug 15-pole, (LAUDA catalogue no. EQM 030) and Plug Housing (LAUDA catalogue no. EQG

017).

5. Profibus Module (LAUDA catalogue no. LRZ 917).

You will find further information in the Operating Instructions Q4DA-E_13-014for the Profibus Module.

6. Pt100/LiBus Module (LAUDA catalogue no. LRZ 918)

External Pt100: For the connection of an external temperature sensor.
LiBus: For the connection of the Command remote control unit from the Proline equipment

line and other accessories, such as a solenoid valve for cooling water control or a re­verse-flow protection device.

The chiller mainly consists of a fully hermetically sealed compressor. The dissipation of the condensation and motor heat
takes place via a fan-ventilated lamellar condenser for water-cooled devices via a heat exchanger. Here, atmospheric air
is drawn in at the front of the device, heated up and discharged at the back and sides. To ensure proper air circulation
the ventilation openings must not be covered up.

The compressor is equipped with a thermal release which responds to the compressor temperature and current con­sumption. The chiller is normally switched in automatically, but can also be switched in manually via the operating menu
( 12.1).

The chiller is switched off when a malfunction occurs which affects safety.

The Cooling Thermostat RE 1050 S is equipped with the SmartCool technology which makes optimum use of the
compressor and only chills when cooling output is demanded by the controller. To achieve this, several sensors in the
cooling circuit monitor the operating status.

Cooling times for the various cooling thermostats can be taken from the cooling curves ( 10).

3.5 Interface modules (Accessories)

3.6 Chiller

09/2021 ECO Silver 13 / 123

On the following pages the ECO SILVER control head, the control panel and the heating/cooling thermostat device
types are presented.

Control Head ECO SILVER (can be used as immersion thermostat with screw clamp)

1 Light sensor for automatic control of display brightness
2 Monochrome LCD display
3 Control panel (refer to following page)

4 Mains switch
5 Selector switch for dividing up the external and internal pump flow

6 Pump output for internal bath circulation
7 Pump output for bath circulation or connection to the pump connection set
8 Pt100 temperature sensor
9 Heater

4

1

2 3 5

6

7

8

9

4 Operating and functional controls

14 / 123 ECO Silver 09/2021

Control panel and display ECO SILVER
Display

Control panel

1 Status display

4 Soft keys, left and right

2 Display of the internal or external
temperature value (T

int

or T

ext

)

5 Enter key
3 Soft-key bar

6 Cursor keys for Up, Down, Left and Right.

7 Taste T max:
Display and adjustment of the
overtemperature switch-off point

1
2

3

4

5

6 4 7

29,73 °C

1 30,00 °C T

set

T

int

DISPLAY  MENU STOP

09/2021 ECO Silver 15 / 123

Rear view of Control Head ECO SILVER

1 USB interface
2 Upper module receptacle approx. 51 mm x 27 mm for analog, RS 232/485 module, Profibus module

and contact module
3 Lower module receptacle approx. 51 mm x 17 mm for Pt100/LiBus module
4 Connection socket 75S for control cable of cooling underpart for RE 1050 S

5 Rating label
6 Connection socket 51H for power supply between the control head and cooling underpart
7 Mains connecting lead

1

2

3

4

5

6

7

16 / 123 ECO Silver 09/2021

Heating Thermostats ECO SILVER

1 Cooling coil connections
2 Pump connection: outflow and return (as standard only with E 4 S and ET 15 S)
3 Four feet

1 Mains connecting lead
2 Rating label

3 Bath draining tap
4 Bath drain point

1

2 3 2

3

4
1

09/2021 ECO Silver 17 / 123

Cooling Thermostats ECO SILVER

1 Pump connection: Outflow and return with fittings 13 mm diameter (plastic)

2 Bath cover
3 Front grip recess
4 Ventilation grill (both sides)
5 Front panel (removable without tools)
6 Four feet

1

2 3 4
5

6

18 / 123 ECO Silver 09/2021

1 Rating label
2 Control cable of cooling underpart (only with RE 1050 S)
3 Rear grip recess
4 Connecting lead between the control head and cooling underpart

5 Bath draining tap
6 Bath drain point
7 Ventilation grill

1 Connections for water cooling

1
2

3

5

6

7

4

1

1

09/2021 ECO Silver 19 / 123

Keep your original packing of your thermostat for later transport.

Danger!

Shipping damage

Electric shock hazard

 Check the device carefully for shipping damage before put-

ting into operation.

 Never operate the device if you have found shipping damage.

Warning!

Falling / toppling equipment

Crushing of hands and feet, impacts

 Use the handles. (With heating thermostats grasp the device

underneath)

 Site the device only on a level surface.

Notice

Falling / toppling equipment

Property damage

 Do not tilt the cooling device during transport and never turn

it upside down.

Check the device and the accessories immediately after shipment for completeness and shipping damage If contra­ry to expectations the device or accessories are found to be damaged, inform the shipping company immediately so
that a report can be produced and the shipping damage examined.

Please immediately inform LAUDA Service Constant Temperature Equipment ( 8.7).

5 Transport and unpacking

20 / 123 ECO Silver 09/2021

Standard accessories:

Catalogue number

Quantity

Description

Included with thermostat

HDQ 168

1

Bath Cover E 4

E 4 S

HDQ 163

1

Bath Cover RE 415, RE 420

RE 415 S and RE 420 S

HDQ 164

1

Bath Cover RE 620, RE 630

RE 630 S

HDQ 165

1

Bath Cover RE 1050

RE 1050 S

HDQ 166

1

Bath Cover RE 1225

RE 1225 S

HDQ 167

1

Bath Cover RE 2025

RE 2025 S

LCZ 0716

1

Pump Connection Set

Cooling thermostats; E 4 S, ET 15 S

LCZ 0720

1

Cooling Coil

E 4 S, ET 6 S

LCZ 0721

1

Cooling Coil

E 10 S, E 20 S, E 25 S, E 40 S,
ET 12 S, ET 20 S

EZB 260

1

Warning Label "HOT"

All thermostats

Note: With applications above 70 °C attach
the warning label at an easily visible point.

YACE0087

1

Operating instructions

All thermostats

09/2021 ECO Silver 21 / 123

– Please note:
– The device can be operated up to an ambient temperature of 40 °C.
– A higher ambient temperature can have a negative effect on the cooling output of the thermostats used.
– When putting the chiller into operation after a lengthy shut-down period, up to 30 minutes may pass until

the rated refrigerating power is available depending on room temperature and device type.

Warning!

Falling / toppling equipment on sloping surfaces / table edge

Crushing of hands and feet

 Only site the device on flat surfaces, not near the edge of

the bench or table.

Assembly as immersion thermostat

– Push the screw clamp on the underside of the control head into

the guide rail.

– Insert the thermostat with the screw clamp into the tempering

vessel ( 9) and screw it tightly to the bath edge by turning the
knurled screw.

– With plastic baths the tubular heating element must not contact

the bath wall.

– Ensure that the ventilation opening at the back of the control

head is free.

– Keep a distance of at least 20 cm free on all sides of the device.

Warning!

Control head drops into bath

Electric shock hazard

 Make sure that the control head mounting is securely joined

to the bath.

6 Before putting the device into operation

6.1 Assembly and siting

Always comply with the following safety information:

Affix the symbol "Hot surface".

The ECO thermostat is used as:

– Immersion thermostat (optionally with cooling coil and/or pump connection set),
– Heating thermostat (heating bath and circulation thermostat),
– Cooling thermostat (cooling/heating bath and circulation thermostat).

22 / 123 ECO Silver 09/2021

Operation with cooling coil

For the optional operation with the cooling coil (LCZ 0720 and LCZ 0721) mount the cooling coil as follows:

Cut the thread with the enclosed screw

– Cut the thread on the holed flange already before assembly.

The cooling coil can only be mounted on one side of the control head.
This is located on the side with the mains switch (refer to illustration).

– Withdraw the mains plug.
– Use a soft underlay to avoid scratches to the upper side of the

control head.

– To fit the cooling coil loosen the two cross-head screws on

the blind flange and remove it.

– Place the flange of the cooling coil in the position of the re-

moved blind flange and push the holed flange underneath it.

Holed flange

– With the two cross-head screws, mount the carrier plate of

the cooling coil and the holed flange to the underside of the
control head.

Note: Use the cooling coil with cooling water only at operating temperatures below 100 °C.
At higher temperatures there is danger of hot steam forming!
For operation with an external consumer follow the connection instructions ( 6.2).

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Assembly as immersion thermostat

– Place the bath vessel on a flat surface.
– The control head is already screwed to the bath bridge.

In the rear part of the bath there are two slots present on the bath
edge. Guide the prongs of the bath bridge into the slots to the right
and left from the rear of the bath. Place the bath bridge fully onto the
bath bridge. Mount the bath bridge on the rear of the bath with the two
enclosed cross-head screws.

– Ensure that the ventilation opening at the back of the control head is

free.

– Keep a distance of at least 20 cm free on all sides of the device.
– Important: Set the flow distribution to INT so that during operation as a

bath thermostat (without external consumer) the flow is discharged
from the opening for the internal bath circulation.
When mounting the pump connection set, the outflow nozzle of the
pump set must be closed (use sealing plug) or connected to the return
nozzle by a hose.

– For bath temperatures above 70 °C attach the sticker included in the

supplied items to an easily visible point on the bath.

– The control head must be removed when optionally fitting the pump

connection set ( 6.2). To do this, release the two cross-head screws
and carefully take the control head out of the bath bridge.

24 / 123 ECO Silver 09/2021

Assembly as cooling thermostat

Notice

Falling / toppling equipment

Property damage

 Do not tilt the cooling device during transport and never turn

it upside down.

– After transport, site the device in place where possible two hours be-

fore putting it into operation so that, if necessary, oil deposits can
form again and the compressor can develop its maximum power.

– Do not cover the ventilation openings.
– Keep a distance of at least 40 cm free on all sides of the device.
– Set the flow distribution to INT so that during operation as a bath

thermostat (without external consumer) the flow is discharged from
the opening for the internal bath circulation.

– Plug the appliance connector of the cooling underpart into the appro-

priate socket 51H and the control cable into the connection socket
at the back of the operating panel.

– During operation as a bath thermostat without an external consumer

and with the pump connection set fitted, the outflow nozzle of the
pump connection set must be closed (use sealing plug) or connected
to the return nozzle with a hose.

– For bath temperatures above 70 °C attach the sticker included in the

supplied items to an easily visible point on the bath.

.

– Operation with external consumer ( 6.2).

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Cooling water pressure (feed - outlet)

max. 10 bar overpressure

Differential pressure (feed - outlet)

min. 3.0 bar

Cooling water temperature

10 to 15 °C recommended,
10 to 30 °C admissible with power restrictions)

Cooling water quantity

see Technical Data ( 10)

Cooling water hose for connection to the device

min. 13 mm

Ways of adjusting the pump flow

The circulation of the heat transfer liquid by the pump can be divided between internal (INT) and external (EXT) with the aid of
the selector switch at the front on the control head (flow distribution). The adjustment is continuously variable and is also possi­ble at any time during operation. .

The adjustment between internal and external circulation is only practicable with a connected external consumer. A pump
connection set is needed to do this. This set is included as standard with cooling devices and with the heating devices E 4 S and
ET 15 S. With immersion thermostats and the other heating thermostats the pump connection set is available as an accessory
( 9).

With a pure bath application the selector switch has to be set to INT.

Connection of the cooling water
Note that the following conditions apply for the connection of the cooling water supply:

26 / 123 ECO Silver 09/2021

For heating thermostats a pump connection set is available as an accessory ( 9) for the connection of an external
consumer.
This pump connection set is included as standard with cooling thermostats and with the heating thermostats E 4 S and
ET 15 S.

Notice

Confusing pump connector and cooling coil

Environmental hazard from leaking heat transfer liquid

 Follow the illustrations in this section.

Notice

Leaks from consumers, hoses and accessories

Environmental hazard from leaking heat transfer liquid

 Always secure the hoses with suitable safety devices.

The ECO thermostat can be equipped as an immersion thermostat or as a circulation thermostat.
Immersion thermostat/heating thermostat

With heating thermostats the control head must first be removed by releasing the two cross-head screws from the bath
bridge.

For optional operation with the pump first mount the pump connection set and then carry out the complete assembly:

Cut the thread with the screw

– Cut the thread on the holed flange already before assembly.

The pump connection set can only be mounted on one side of the control head.
(see illustration).

– Withdraw the mains plug.
– Use a soft underlay to avoid scratches to the upper side of the control

head.

– With heating thermostats: take out the flat seal.
– Remove the blind flange by releasing the two cross-head screws.

6.2 Connection of external consumers

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– Turn the pump output downwards for external bath circulation.
– Fit the hose section of the pump connection set onto the outflow elbow

and place the pump connections in the position of the removed blind
flange.

– Push the holed flange under the pump connections and fasten it with

two cross-head screws to the underside of the control head.

Holed flange

– Use the flat seal. Make sure the seal is in the correct position. On one

side of the seal there are two steps.

– They must be positioned on the side with the display.
– Refit the control head onto the bath bridge with the two cross-head

screws.

– Select the division of the pump flow to suit the thermostating task using

the selector switch on the front of the control head.

The position EXT gives the greatest flow in the external circuit.
With the position INT the external flow is throttled to a minimum and the

outlet for the internal bath circulation is fully opened.
With positions between INT and EXT the flow is divided up between internal

and external circulation.

28 / 123 ECO Silver 09/2021

Operation as circulation thermostat

To ensure the greatest volume flow, with operation as a circulation
thermostat ensure the shortest possible hose connections with the
largest possible hose internal diameter.

– Connect a hose with 11 – 12 mm inside diameter ( 6.4)

to the pump connections.

Pump connection ( labeling on the housing of the control head):

 Outflow OUT (front)
 Return to the bath IN (rear)

Note:

– Always use the largest possible cross-section and the shortest possible hose lengths in the external circuit.
– For a hose cross-section that is too small a temperature gradient occurs between the bath and external con-

sumer due to a volume flow that is too low. In this case increase the bath temperature or the pump level appro­priately.

– Secure the hoses with the aid of hose clips.
– If the thermostat is to be externally controlled, a temperature sensor must be fitted in the external consumer.
– If the consumers are situated at a higher level and with the pump stopped and air seeping into the external fluid

circuit, then even with enclosed circuits the external volume may run empty. There is danger of the thermostat
overflowing.

– If no external consumer is connected, the outflow nozzle must be sealed off or connected to the return nozzle

by a hose.

Notice

Pump connections not closed off

Environmental hazard from leaking heat transfer liquid

 Fit sealing plugs to the pump connections when no external

consumers are connected and set the flow distribution to in­ternal “INT”.

Notice

Thermostat overflow

Environmental hazard from leaking heat transfer liquid

 Do not position the thermostat above the consumer.

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Caution!

Contact with heat transfer liquid when filling / draining

Harmful when inhaled,

damage to eyes and skin

 Pay attention to the safety data sheet for the heat transfer

liquid.

 Use CE gloves, protective clothing and eye protection during

physical contact with heat transfer liquid.

 Avoid splashing the heat transfer liquid.
 Make sure that the drain tap is closed before filling.

Caution!

Use of unsuitable heat transfer liquid

Explosion, burns, scalds, fire

 When selecting the heat transfer liquid, observe the admissi-

ble temperature range.

 Only use LAUDA heat transfer liquids.

Notice

Overfilling containers, spilling heat transfer liquid

Environmental hazard from leaking heat transfer liquid

 Note the thermal volume expansion of the heat transfer liq-

uid.

 Where necessary, consider the displacement volume of the

body being introduced.

 Take the volume of external consumers into account.

Filling

– Withdraw the drain tap.
– Optimum operation is ensured with a filling level of 20-40 mm below the bath bridge (max. filling level: 20 mm).
– Operation is possible down to a filling level of 60 mm below the bath bridge; a low level alarm occurs from a filling

level of approx. 90 mm below the bath bridge. ( 8.1)

– With the use of oils as heat transfer liquids note that they expand on heating (approx. 10 % per 100 °C).
– Take into account the displacement volume of any objects to be introduced into the bath.
– With a connected external consumer the complete expansion takes place in the bath.

6.3 Filling and emptying

LAUDA accepts no liability for damage caused by the use of unsuitable heat transfer liquids (approved heat transfer liquids
( 6.4)).

30 / 123 ECO Silver 09/2021

Draining and changing the heat transfer liquid

– Switch off the thermostat and withdraw the mains plug.
– Allow the device and heat transfer liquid to cool down to or warm

up to room temperature.

– Push a hose onto the bath drain point.
– Drain the heat transfer liquid by opening the drain tap at the back

of the device.

1 Drain tap, cooling thermostats

2 Drain tap, heating thermostats

Completely drain the bath, external consumers, accessories and hose connections and flush or clean them (e.g. with new
heat transfer liquid).

Caution!

Contact with hot / cold heat transfer liquid

Scalds, frostbite

 Bring heat transfer liquids to room temperature before

draining.

 Make sure that the drain tap is closed after draining.

Caution!

Delay in boiling and thermal decomposition due to liquid residues

Burns, scalds, development of harmful vapors

 Remove all old heat transfer liquid completely from the bath,

external consumers, accessories and hoses. Flush and clean
them with new heat transfer liquid.

1

2

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Note:

– Tap water may be unsuitable for operation due to the calcium carbonate content. The bath vessel may calcify.
– High purity water (from ion exchangers) and distilled or bidistilled water are unsuitable for operation due to the

corrosive properties of these media. High purity water and distillates are suitable as a medium after the addition
of 0.1 g of soda (Na2CO3, sodium carbonate) per liter of water.

– Water containing iron (rust formation), chlorine (pitting) and untreated river water ("algae formation") is unsuit-

able.

– The bath vessels of the LAUDA ECO thermostats are produced in stainless steel 1.4301 and are accordingly

resistant to mechanical and chemical stresses.

– Metals have different electrochemical potentials. Therefore, in the case of direct contact between the tank and a

frame (copper for example) electrochemical oxidation may occur. The bath corrodes despite the use of high
quality materials on the tank. Avoid the use of this type of frame or direct contact with it or contact with non­ferrous metal samples and the inside of the container. Use original LAUDA stainless steel frames or commer­cially available frames in temperature-resistant plastics.

a) Approved heat transfer liquids

LAUDA

designation

Operating

temperature

range

Chemical

characterisation

Viscosity

(kin)

Viscosity

(kin)

at

temperature

Flash
point

Container size

Catalogue number

°C

mm²/s at

20 °C

mm²/s

°C

5 L

10 L

20 L

Kryo 51 

-50 – 120

Silicone oil

5

34 at -50 °C

120

LZB 121

LZB 221

LZB 321

Kryo 30 

-30 – 90

Monoethylene

glycol/water mixture

4

50 at -25 °C

---

LZB 109

LZB 209

LZB 309

Kryo 20

-20 – 170

Silicone oil

11

28 at -20 °C

170

LZB 116

LZB 216

LZB 316

Therm 160 

60 – 160

Polyalkylene glycol

141

5 at 140 °C

260

LZB 106

LZB 206

LZB 306

Therm 180

0 – 180

Silicone oil

23

36 at 0 °C

250

LZB 114

LZB 214

LZB 314

Therm 250

50 – 250

Silicone oil

125

45 at 50 °C

300

LZB 122

LZB 222

LZB 322

Aqua 90 

5 – 90

decalcified water 

1

--

--

LZB 120

LZB 220

LZB 320

 At higher temperatures vaporization losses occur. In this case use a bath cover ( 9). Use distilled water or pure

demineralized water only after adding 0.1 g of soda (Na2CO3 sodium carbonate) per liter of water. Otherwise
there is the risk of corrosion!

 The proportion of water reduces with longer working at high temperatures and the mixture becomes flammable

(flash point 119 °C). Check the mixing ratio using a hydrometer.

 Not suitable for polycarbonate baths.

– Silicone hoses are not suitable for silicone oils!
– EPDM hoses are not suitable for mineral oils.

6.4 Heat transfer liquids, cooling water and hoses

32 / 123 ECO Silver 09/2021

– When choosing the heat transfer liquid, it must be noted that at the lower limit of the operating temperature

range impairment of the heat transfer properties is to be expected due to the increasing viscosity. Therefore, on­ly use the full operating temperature range where necessary.

– The working ranges of the heat transfer liquids and hoses are general figures which can be tightened due to the

operating temperature range of the devices.

– Do not use any contaminated heat transfer liquids. Contamination of the pump chamber may lead to the pump

jamming and the device then switching off.

– Pay attention to the safety data sheet for the heat transfer liquid. Follow the regulations for disposal of the used

heat transfer liquid.

If required, you can request safety data sheets at any time ( 8.7).

Certain requirements are placed on the cooling water with regard to purity. Depending on the cooling water contamina­tion, a suitable method of purification and/or treatment of the water must be employed. The condenser and the com­plete cooling water circuit can become blocked, damaged and leaky due to unsuitable cooling water. Extensive conse­quential damage may arise on the whole cooling circuit. The cooling water quality depends on local conditions. If a fault
or damage occurs due to unsuitable water quality, it is not covered by our guarantee.

Important: Danger of corrosion of the cooling water circuit due to water of unsuitable quality.

 Free chlorine (e.g. from disinfectants) and water containing chlorine lead to pitting in the cooling water circuit.
 Distilled, deionized or demineralized water is unsuitable due to its corrosive properties and leads to corrosion in

the cooling water circuit.

 Seawater is unsuitable due to its corrosive properties and leads to corrosion in the cooling water circuit.
 Water containing iron or iron particles leads to rust formation in the cooling water circuit.
 Due to the high lime content hard water is not suitable for cooling and leads to calcification in the cooling wa-

ter circuit.

 Cooling water with suspended matter is not suitable.
 Untreated and unpurified river or cooling tower water is not suitable due to its microbiological content (bacte-

ria), which can become deposited in the cooling water circuit.

 Putrid water is not suitable.

b) Cooling water

09/2021 ECO Silver 33 / 123

Specification

Value and Unit

pH – value

7.5 – 9.0

Hydrocarbonates [HCO3-]

70 – 300 mg/L

Chlorides (Cl-)

< 50 mg/L

Sulfates [SO4 2-]

< 70 mg/L

Hydrocarbonates [HCO3-] / sulfates [SO4 2-]

> 1.0

Total hardness

4.0 – 8.5 °dH

Conductivity

30 – 500 μS/cm

Sulfites [SO3 2-]

< 1 mg/L

Free chlorine gas (Cl2)

< 0.5 mg/L

Nitrates (NO3 -)

< 100 mg/L

Ammonia (NH3)

Not permissible

Iron (Fe), dissolved

< 0.2 mg/L

Manganese (Mn), dissolved

< 0.05 mg/L

Aluminum (Al), dissolved

< 0.2 mg/L

Free aggressive carbonic acid (CO2)

Not permissible

Hydrogen sulfide (H2S)

Not permissible

Algae growth

Not permissible

Suspended matter

Not permissible

Suitable cooling water quality

Risk to the environment due to oil contamination of the cooling water circuit
With a leaky condenser there is the danger that refrigerating machine oil from the refrigerant circuit of the cooling thermo-

stat can pass into the cooling water.
Follow all the legal requirements and the regulations of the water supply utility which apply at the point of use.

Water pollution due to leakage
To avoid pollution due to a leak in the cooling water system it is recommended that a leakage-water detector with a water

cut-off is installed.

Servicing intervals

Follow the information for cleaning and decalcifying the cooling water circuit ( 8.3.4.2).

34 / 123 ECO Silver 09/2021

c) Approved elastomer hoses

Type of hose

Internal

diameter

Ø mm

Temperature range

°C

Application range

Catalogue

number

EPDM hose

uninsulated

9

10 – 90

For all LAUDA heat transfer

liquids except mineral oils

RKJ 111

EPDM hose

uninsulated

12

10 – 90

For all LAUDA heat transfer

liquids except mineral oils

RKJ 112

EPDM hose

insulated

12

External Ø

approx. 35 mm

-35 – 90

For all LAUDA heat transfer

liquids except mineral oils

LZS 021

Silicone hose

uninsulated

11

10 – 100

Water or

Water/glycol mixture

RKJ 059

Silicone hose

insulated

11

External Ø

approx. 35 mm

-60 – 100

Water or

Water/glycol mixture

LZS 007

Note:

 EPDM hoses are not suitable for mineral oils.
 Never use silicone oil with silicone hoses.
 Secure the hoses with the aid of hose clips.

d) Approved metal hoses in non-rusting stainless steel with union nut M16 x 1, inside diam. 10 mm

Type

Length (cm)

Temperature range °C

Application range

Catalogue

number

MC 50

50

10 – 400

With simple insulation

For all LAUDA heat transfer

liquids

LZM 040

MC 100

100

10 – 400

LZM 041

MC 150

150

10 – 400

LZM 042

MC 200

200

10 – 400

LZM 043

Pump short circuit

18

10 – 400

LZM 044

MK 50

50

-90 – 150

With foam insulation for the

cooling range

For all LAUDA heat transfer

liquids

LZM 052

MK 100

100

-90 – 150

LZM 053

MK 150

150

-90 – 150

LZM 054

MK 200

200

-90 – 150

LZM 055

Pump short circuit

18

-90 – 150

LZM 045

09/2021 ECO Silver 35 / 123

At bath temperatures slightly above the room temperature (approx. 2 – 5 K) operation is possible at a low pump level
(1 or 2) without cooling. For temperatures below room temperature cooling must be used.

With the immersion thermostat use a cooling coil ( 6.1).

With bath and circulation thermostats the cooling coil is already built in as standard.

Connect external cooling fluid to the cooling coil. At temperatures above 20 °C, fresh water can be used. Ensure the
lowest possible water consumption.

Make sure that the details on the name-plate match mains voltage and frequency.

Notice

Use of inadmissible mains voltage or frequency

Property damage

 Compare the rating label with the available mains voltage and

frequency.

Note for electric installation on site:

The devices must be protected with a 16 ampere circuit breaker fitted during installation.
Exception: Devices with 13 ampere UK plugs.

Note:

– The device mains plug is used as a mains disconnection component.

The mains plug must be easily recognizable and easily accessible.

– Only connect the device to a socket with a protective earth conductor (PE). No liability is accepted for incor-

rect mains connection.

– Make sure that if not using an external consumer, the pressure nozzle is closed off or short-circuited to the re-

turn nozzle.

– Make sure that the unit is filled according to section ( 6.3).

Menu language
When switching the device on for the first time, you can select your desired menu language with the cursor keys and

. Confirm your choice with the enter key .

– The menu language can be changed at any time ( 7.4.6).

ESC  OK STOP

English

Deutsch 
Français
Español
Italiano

6.5 Cooling of heating thermostats

6.6 First switch-on

36 / 123 ECO Silver 09/2021

Warning!

Live parts during module installation

Electric shock hazard

 Disconnect the device from the mains before module instal-

lation.

 Have the installation carried out only by specialists.

The ECO heating and cooling thermostats can be supplemented with interface modules which are inserted at the rear of
the control head in two different module slots.

Upper module receptacle (approx. 51 mm x 27 mm) for
RS 232/484 module / analog module / contact module / Profibus
module

Lower module receptacle (approx. 51 mm x17 mm) for
Pt100/LiBus module

– Touch the bare earthed stainless steel back panel of the ECO thermostat to discharge any electrostatic charge.
– Remove the module from the packaging.
– Switch off the thermostat and withdraw the mains plug.

– The plastic cover has a recess on each side to ease removal.

Insert a screwdriver first in the right and then in the left re­cess of the plastic cover and carefully lever it up.

– Pull the bus connecting lead out of the plastic cover.

6.7 Installation of modules

When installing modules always follow this safety information:

09/2021 ECO Silver 37 / 123

– Plug in the bus connecting lead (red plug in the red sock-

et).

– Introduce the module into the appropriate receptacle and

fasten it using the two cross-head screws.

– Insert the mains plug again and switch on the thermostat.
– The connectors have reverse-polarity protection. The plug

has a projection which slides into a notch on the socket.

38 / 123 ECO Silver 09/2021

Warning!

Control head drops into bath

Electric shock hazard

 Make sure that the control head mounting is securely joined

to the bath.

Warning!

Addition of liquids with low boiling points (e.g. water to hot oil), alter-

ation of liquid properties

(reducing the flash point)

Explosion, burns, scalds, fire

 Site the device in suitable premises.
 Avoid dripping water and condensation.
 Do not position any small parts and liquids above the device.
 Keep the cover on the thermostat (if present) closed.
 Prevent the ingress of secondary liquids (e.g. from custom-

er's heat exchanger).

 Do not work with liquids in the direct vicinity of the device.
 Check the heat transfer liquid at least every six months (e.g.

mixing ratio with a hydrometer).

Caution!

Skin contact with heat transfer liquid or hot / cold surfaces

Burns, scalds, frost bite, impacts, cuts,

snagging

 Only operate the device with its housing.
 Avoid splashes and hand contact with hot or cold heat trans-

fer liquid.

 Use CE gloves, protective clothing and eye protection.
 Affix the symbol "Hot surface".
 Do not touch the connecting and drainage points in the op-

erating state.

Caution!

Contact with vapors from the heat transfer liquid

Harmful by inhalation

 Use an extractor hood.
 If possible, use a bath cover.

7 Operation

Always follow this safety information:

09/2021 ECO Silver 39 / 123

Caution!

Bath overflow due to thermal expansion or

immersion of objects

Burns, scalds, frostbite

 Take the volume of external consumers into account.
 Take into account the increase in volume with a rise in tem-

perature.

Caution!

Hot vapor formation / discharge of boiling cooling-water on the cool-

ing coil

Burns, scalds

 Filling of cooling coil with cooling water only admissible up to

T

max

of 100 °C!

Notice

Inadmissible operating temperatures;

temperature difference between outflow and product

too large

Property damage (consumers, external components)

 Note that an externally controlled bath temperature, espe-

cially during a transient response, may differ substantially
from the set-point temperature.

 Note the various limitation options (Tih, Til, T

max

, correction

limitation).

 Set the overtemperature switch-off point T

max

according to

the heat transfer liquid. T

max

must be below the flash point.

40 / 123 ECO Silver 09/2021

– Switch on the device with the mains switch at the front. An acous-

tic signal sounds.

 1 s

– The current bath temperature (T

int

), pump level as well as the pump

symbol, the set-point temperature T

set

and the soft-key bar at the

bottom edge of the display appear.

– For the optimum use of the display representation, the soft-key bar

disappears if no key has been pressed for at least ten seconds. The
representation can be reactivated by pressing any key.

– The pump starts (exception: "Standby" operating status).
– When standby is activated ( 7.4.4), the last operating values are

taken over.

– With the key you check or change the overtemperature switch-

off point:

– On pressing the key T

max

the value in the upper line is displayed;

– (Setting the overtemperature switch-off point T

max

( 7.4.1)).

29.73 °C

1 30.00 °C Tset

T

int

DISPLAY  MENU STOP

29.73 °C

1 30.00 °C T

set

T

int

T

max

85 °C

- - -  T MAX - - -

29.76 °C

T

int

7.1 Switching on

09/2021 ECO Silver 41 / 123

intern Pt100

extern Pt100

Stage 6

extern analog

Stage 5

extern serial

Stage 4

extern USB

Xp

Stage 3

Tn

Stage 2

intern Pt100

Tv man/auto

Stage 1

extern Pt100

Tv

Td

Contr. Variable

Offset source

Control parameter

Diff.set./actual2

Setpoint offset

Corr.limit. 1 50.0

Kpe

Pump Level

Tne

Control

Alarm

Xpf

Cooling autom.

off Warn

Tv man/auto

Limits

on Error

Tve

Basic setup

automatic

Tde

Calibration

Brightness

Prop_E

Factory setting

Lower limit (Til)

Displayed T-ext

Main Menue

Device status

Upper limit (Tih)

off off

Sounds

on extern Pt100

Display

extern analog

Autostart

no extern serial

Curr.Consum. 16.0A

yes extern USB

DLK 10/25 off

Setpoint Value

Language

English

loud

Setup

Deutsch

medium

Programmer

Français

low

Interfaces

Calibration

Español

off

Factory calibration

Italiano

all default

automatic

Control

no Stage 5

yes Stage 4

Error store

Stage 3

Status

Device data

no Stage 2

Edit SW version

yes Stage 1

Loops

Type

off

Serial numbers

Control parameter

internal Pt100

miscellaneous

Temp.ext. Pt100

Section F1

Start Temp.ext. USB

Temp.ext.Ethernet

Hold Temp.ext. EthCAT

Stop

Continue

no

Stop yes

7.2 Menu structure

With the soft keys you can select the following menu points with the SILVER control head:

1

Correcting quantity limit

2

Difference setpoint/actual value

42 / 123 ECO Silver 09/2021

– The ECO thermostats offer you intuitive menu guidance. In the following the possible window views and the sym-

bols used are explained.

– Basic window in the normal display

– The following information is displayed depending on the operating

status:

T

set

;

T

int

T

ext

DISPLAY;
 MENU,
STOP.

– Pump runs with displayed pump level;
– Heater is active;
– Chiller is active;
– Set-point temperature;
– Current bath temperature;
– Temperature of the external application (if external

temperature sensor is connected);

– Soft-key bar; function call via associated keys;

– Apart from the normal display of the basic window, there is another display. This includes in addition a further status

display. With the soft-key bar activated changeover between the two display representations is obtained by pressing
the left soft key. With both displays the soft-key bar disappears if no key has been pressed for at least ten seconds.
The display of it can be reactivated by pressing any key.

– Basic window in the expanded display

– The following information is displayed depending on the operating sta-

tus:

T

int

T

set

T

ext

DISPLAY,
 MENU,
STOP

– Pump runs with displayed pump level;
– Heater is active;
– Chiller is active;
– Current bath temperature;
– Set-point temperature;
– Temperature of the external application (if external

temperature sensor is connected);

– Soft-key bar; function call via associated keys;

– With a connected external sensor and its selection as the control variable, the basic window with the expanded

status display is always active.

29.73 °C

T

ext

1

29.85 T

int

30,00 T

set

DISPLAY  MENU STOP

29.73 °C

1 30.00 °C T

set

T

int

DISPLAY  MENU STOP

7.3 Display representation

7.3.1 Basic window

09/2021 ECO Silver 43 / 123

– The menu of the ECO SILVER thermostats consists of several menu levels. With the cursor keys , , , you

can call the individual menu points and select them with the enter key .



– Symbolizes the enter key or its assigned function.



– Displays the currently selected function.

►

– Indicates that further menu levels (submenus) are present.

– The padlock symbolizes a blocked function.

(Possible reasons: No access rights or function deactivated by pa­rameter settings).

Examples of display representation:

Main menu

In the main menu selected menu points are displayed inversely.

– The soft-key bar is shown in the lower region of the display. The

following functions, for example, can be selected with the soft
keys:

– ESC You are returned to the main menu.
– OK You are taken to the submenu (this can also

occur by pressing ).

– STOP Standby is activated.

Submenu "Cooling"

– The following information is displayed in this window example:
– The setting on is displayed inversely and can be selected by press-

ing the enter key .

– A tick  behind the menu point indicates that this setting is active.

In the example the cooling is set to "automatic".

ESC  OK STOP

off

on .

automatic 
ESC  OK STOP

Setpoint Value

Setup
Programmer
Interfaces

7.3.2 Menu window

44 / 123 ECO Silver 09/2021

Values are input using the entry window.

In the entry window the following information is displayed:
The first line contains the input parameter in short form (cf. example T

set

).
Min. and Max. state the limits for the value to be entered.
The value to be entered is shown in large characters. The cursor flashes

under the value.

You can change the value with the cursor key or . If you keep one of the
two cursor keys pressed longer, input is speeded up.

By pressing or you can also select numbers individually and change them
with or .

By pressing (+/-) the arithmetic sign can be changed.
The enter key takes over the set value.

By pressing (ESC) you are returned to the menu level without any
change.

Warning!

Overheating due to entering an incorrect T

max

and set-point tempera-

ture

Burns, scalds, fire

 Set T

max

in each case according to the heat transfer liquid

used. T

max

must be below the flash point.

– Hold the key pressed during the complete setting procedure:

– Press the enter key .

The entry window appears. The cursor flashes under the T

max

value. The

maximum and minimum adjustable temperature values are displayed.

– Change the value with or .

Note: With a longer depression the figures increment faster.

– Single figures can be selected by pressing or .

Tmax
Min: 0 Max: 152

ESC  OK - - -

85

Tset
Min: -30.00 Max: 152.00

ESC  OK + / -

85

7.3.3 Entry window

7.4 Basic setup

In this section the settings required for using the device as prescribed are summarized. For more extensive settings refer
to the appendix ( Other settings).

7.4.1 Setting the overtemperature switch-off point T

max

09/2021 ECO Silver 45 / 123

– Confirm your choice with the enter key .

– On releasing you are returned to the menu level without any change.

For T

max

the following applies: 5 Kelvin above the required maximum bath temperature, but below the flash point of the

heat transfer liquid.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Select the menu point highlighted in color

Setpoint Value using the enter key .

– The entry window appears. The cursor below the temperature

value flashes and can be changed within the displayed limits.

– Change the value with or .
– Single figures can be selected by pressing or .
– By pressing (+/-), with appropriate equipment, the arith-

metic sign can be changed.

– Confirm your choice with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

T

max

85 °C

- - -  T MAX - - -

29.76 °C

T

int

ESC  OK STOP

Setpoint Value

Setup
Programmer
Interfaces

Tset
Min: -30.0 Max: 152.0

ESC  OK + / -

35.0

–

7.4.2 Setting the temperature set-point value

46 / 123 ECO Silver 09/2021

– With the ECO Vario pump you have six pump levels available with which you can optimize the bath circulation,

flow rate and pressure and the mechanical heat input. With small thermostats (e.g. E 4 S, RE 415 S, RE 420
S) without an external consumer power levels 1 to 3 are practicable and sufficient.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– The adjacent menu window appears by selecting and confirming

 Setup  Pump level.

– The level can be selected with or . The selected level is im-

mediately active without confirmation (in this example it is

Stage 2).

–

You quit the menu by pressing (ESC) or .

– In the "Standby" mode the pump, heater and chiller are switched off. The operating display remains active.

– You activate the soft-key bar by pressing any key.

–
– 1. Activate "Standby" by pressing (right soft key).

– If "Standby" is active, it is highlighted in color in the soft-key bar:

START .

ESC  OK STOP

Stage 5
Stage 4
Stage 3

Stage 2

Stage 1

29.73 °C

1 30.00 °C T

set

T

int

DISPLAY  MENU START

7.4.3 Setting the pump level

7.4.4 Activating the "Standby" operating state

09/2021 ECO Silver 47 / 123

With this function the temperature limits Til and Tih are defined. If, for example, you are using water as the heat transfer
liquid, +5 °C is practicable as the minimum temperature and +95 °C as the maximum temperature.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Limits.
– The adjacent menu window appears.
– Select the lower (Til) or upper (Tih) limit with or and con-

firm it with .

– In the entry window the cursor flashes below the value to be

changed. The permissible adjustment range is indicated with
Min and Max.

– Change the value with or .
– Single figures can be selected by pressing or .
– By pressing (+/-) the arithmetic sign can be changed.
– Confirm your choice with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

The ECO SILVER thermostats offer you the possibility of selecting the menu languages of English, German, French,
Spanish and Italian.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Basic setup 

Language.

– The adjacent menu window appears.
– Select the language with or and confirm with .

–

By pressing or (ESC) you are returned to the menu level without any change.

Up.limit (Tih)
Min: -30.0 Max: 152.0

ESC  OK + / -

-25.0

ESC  OK STOP

Lo. limit (Til)

Up.limit (Tih)

ESC  OK STOP

English

Deutsch 

Français
Español
Italiano

7.4.5 Defining temperature limits

7.4.6 Selecting the menu language

48 / 123 ECO Silver 09/2021

Alarms: Alarms are relevant to safety. Pump, heating and chiller switch off.
Warnings: Warnings are normally not relevant to safety. The device continues to run.
Errors: If a malfunction occurs, switch off the unit at the mains switch. If the malfunction recurs after switching

on the device, contact LAUDA Service Constant Temperature Equipment ( 8.6) or your local service
organization.

All alarms, warnings or error messages triggered on the ECO thermostat are shown in the display as text. The list with
alarms and warnings can be found in the appendix ( 12.7).

Once the cause has been rectified, you can clear alarms and warnings with .

Warnings can be ignored with without the message periodically appearing again.

Warning!

Overheating due to entering an incorrect T

max

and set-point tempera-

ture

Burns, scalds, fire

 Set T

max

in each case according to the heat transfer liquid

used. T

max

must be below the flash point.

Note: The devices are rated for operation with flammable and non-flammable liquids according to DIN EN 61010-1 and
DIN EN 61010-2-010.

Set the overtemperature switch-off point as described in ( 7.4.1). Recommended setting: 5 K above the desired maxi­mum bath temperature (Remark: The overtemperature switch-off point T

max

is controlled by a system which operates

independently of the bath control.

Set the overtemperature switch-off point T

max

below the flash point of the heat transfer liquid.

– The set overtemperature switch-off point is displayed on pressing

in the display.

T

max

85 °C

- - -  T MAX - - -

29.76 °C

T

int

8 Maintenance

8.1 Alarms, warnings and errors

8.1.1 Overtemperature protection: Alarm and checking

09/2021 ECO Silver 49 / 123

 

When the bath temperature is located above the overtemperature switch­off point, a two-tone alarm sounds. "Overtemperature" appears in the dis­play, the heater switches off on all poles and the pump and chiller are
switched off via the electronics.

– Rectify the cause of the malfunction.
– Wait until the bath temperature has cooled below the over-

temperature switch-off point or set the overtemperature switch­off point higher than the bath temperature.

If "Overtemperature" appears in the display:

– Unlock the "Overtemperature" display with .

Before a longer unsupervised operation check the overtemperature protection:

– Slowly reduce T

max

as described in ( 7.4.5). The thermostat should switch off when the actual temperature is

greater than T

max

.

An alarm message (step 1-2, see above) should follow.

– Reset the switch-off point to be higher than the bath temperature.
– Unlock the "Overtemperature" display with .

 

When the liquid level falls so far that the heaters are no longer completely
covered with liquid, a two-tone alarm sounds. "Low Level Pump" appears in
the display, the heater switches off on all poles and the pump and chiller are
switched off via the electronics.

– Rectify the cause of the malfunction.
– Top up the missing heat transfer liquid ( 6.3 and 6.4).
– Unlock the "Low Level Pump" display with .

Check the safety system at regular intervals ( 8.3.2) by lowering the bath level. Do not carry out this test at a bath
temperature below 0 °C or above 50 °C in order to avoid dangers due to temperatures that are too hot or too cold.

An alarm message (step 1-2, see above) should follow.

– Top up with heat transfer liquid.
– Unlock the "Low Level Pump" display with .

Switch the device off immediately and withdraw the mains plug if irregularities occur when checking the safety devices.
Contact LAUDA Service Constant Temperature Equipment ( 8.7) or your local service.

No. Alarm

Overtemperature

3 Overtemperature

DISPLAY  OK STOP

No. Alarm

Low Level Pump

1 Low Level Pump

DISPLAY  OK STOP

8.1.2 Low level: Alarm and checking

50 / 123 ECO Silver 09/2021

Here, accumulated error messages as well as device and software data can be recalled.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Device Status.

The adjacent menu window appears.

– Here, you can now
– Errorstore Read out the error store
– Device data Request device data
– SW version Request the software version
– Type Request the device type
– Serial numbers Request serial number.

– For error analysis the ECO thermostats have an error store in which up to 140 warning, alarm and error

messages can be saved.

– Error store

– confirm with .

The latest message is located in the first position.

– You navigate with or through the results which are sorted

by date. The message text appears in the footer.

The relevant module which is causing the message is displayed under
"Source".

"Code" is the coded alarm, warning or error description.
"Type" specifies alarm, warning or error. The list of alarms and warnings

can be found in the appendix ( 12.7).

– Device data

– confirm with .

The device parameters are displayed under the menu point Device data.

No. Source Code Type

Low Level Pump

11 Control 1 Alarm

10 Safety 53 Error
9 Safety 53 Error

ESC  OK STOP

ESC  OK STOP

T_int 29.73 °C

T_lp 30.31 °C
T_b_s 22.64 °C
T_a 20.31 °C
T max_s 60 °C

ESC  OK STOP

Error store

Device data ►
SW version ►
Type RE 420 ►
Serial numbers ►

8.2 Device status

8.2.1 Store for errors, alarms and warnings

8.2.2 Device data

09/2021 ECO Silver 51 / 123

– SW version

– confirm with .

Under the menu point SW version the appropriate software versions are
displayed, depending on the device type and connected modules.

– Type

– confirm with .
– The device type without the suffix "S" (SILVER) is shown in the menu.

Note:
With a change of device type parameters are re-initialized and control parameters adapted by the user are lost! There­fore, the type change has a three second delay on the key depression.

– The overtemperature switch-off point T

max

is automatically adapted to the device type, i.e. with the ECO
SILVER thermostat with a stainless steel bath Tmax = 152 °C, for the ECO SILVER thermostat with trans­parent bath Tmax = 102 °C.

– Following this, T

max

must be re-entered manually ( 7.4.1), because otherwise the device goes into the error

status (error message in ECO SILVER: "T max diff. C to S").

– Serial numbers

– confirm with .

Under the Serial numbers menu point the serial numbers of Control and
Safety are displayed. Provided they are available, the serial numbers of
connected modules are also displayed.

Control 1.53.00

Safety 1.43
Cool 1.37
Ext Pt 1.35
Analog 3.15

ESC  OK STOP

Control

LCK1913-09-0002
Cool
KTExy-08-9876
Ext Pt

ESC  OK STOP

8.2.3 Software version

8.2.4 Displaying and changing the device type

8.2.5 Displaying serial numbers

52 / 123 ECO Silver 09/2021

Caution!

Critical temperature of device parts, heat transfer liquid or accesso-

ries (hoses)

Burns, scalds, frostbite

 Bring the device parts, accessories and heat transfer liquid to

room temperature before touching them.

 Have repairs carried out only by a specialist.
 Affix the symbol "Hot surface".

Warning!

Live parts in contact with cleaning agents

Electric shock hazard

 Disconnect the device from the mains before cleaning.

Cleaning can be carried out with water with a few drops of a surfactant (washing-up liquid) added and with the aid of a
damp cloth.

Notice

Live parts in contact with cleaning agents

Property damage

 Disconnect the device from the mains before cleaning.
 Water and other liquids must not enter the control head.

Only clean the control head with the cleaning agents, water (with washing-up liquid), petroleum benzine or ethanol.
Do not use any acetone or aromatic hydrocarbons (dilution) This would lead to permanent damage to the plastic surfaces.

Before all maintenance or cleaning work it must be ensured that decontamination of the device is carried out if it has been
in contact with hazardous materials.

8.3 Servicing

Follow all the safety information for cleaning and servicing the device.

8.3.1 Cleaning

09/2021 ECO Silver 53 / 123

Device part

Mandatory for initial operation
and before any longer unsuper­vised operation, then with rec­ommended frequency

Section

Remarks

Complete device

External condition of device

Monthly

Heat transfer liquid

Inspecting the heat transfer liquid

Every six months

( 8.3.3)

Bath vessel with drain tap

Sealing

Daily

External inspection

External hoses

Material fatigue

Monthly

External inspection

Chiller

Clean the air-cooled condenser

Monthly

( 8.3.4.1)

Cooling thermostat

Clean the screw-in sieve

Monthly

( 8.3.4.2)

Cooling thermostat, water­cooled

Decalcifying the cooling water
circuit

Quarterly

( 8.3.4.2)

Cooling thermostat, water­cooled

Electronics

Overtemperature protection

Quarterly

( 8.1.1)

Low-level protection

Quarterly

( 8.1.2)

If the heat transfer liquid becomes contaminated or degenerated, it should be renewed.

The heat transfer liquid is to be checked for its usability as required, but at least every six months. Further use of the heat
transfer liquid is only permissible if the inspection indicates this.

The test of the heat transfer liquid takes place according to DIN 51529; ("Testing and assessment of used heat carrier media"). Source:
VDI 3033; DIN 51529.

Caution!

Critical temperature of the heat transfer liquid

Scalds, frostbite

 Bring the heat transfer liquid to room temperature for the

analysis.

8.3.2 Servicing intervals

Bring the device parts and accessories to room temperature before touching them.

8.3.3 Inspecting the heat transfer liquid

54 / 123 ECO Silver 09/2021

The cooling circuit is largely maintenance-free.
Remove dust and contamination from the condenser at regular
intervals (depending on operating period and exposure conditions).

– To do this, remove the front grille by grasping it at the

bottom with both hands and pulling the grille to the front.
To avoid damage, remove the front grille slowly and care­fully.

– Then brush down the condenser and, where necessary,

blow it out with compressed air.

Note:

Caution!

Contact with sharp-edged vanes on the condenser

during cleaning

Cuts

 Clean the condenser with suitable tools (e.g. hand brushes,

compressed air...).

For regular cleaning (depending on the degree of contamination of the cooling water) screw-in sieve:

– Remove the water supply hose from the device.
– Unscrew the fitting from the device with a 19 AF open-ended wrench and remove the screw-in sieve from the

fitting.

– Clean the screw-in sieve and then insert in back into the fitting.
– Mount the fitting and the water supply hose onto the device.

8.3.4 Cleaning the condenser

8.3.4.1 Air-cooled condenser

8.3.4.2 Water-cooled condenser

To obtain the full cooling output, the sieve and water circuit must be cleaned at regular intervals.

Cleaning the screw-in sieve

Decalcifying the cooling water circuit

09/2021 ECO Silver 55 / 123

At regular intervals of 3 months or longer (depending on the water hardness / degree of contamination of the cooling
water) the water-cooled condenser must be decalcified or cleaned.

Required equipment:

 Two containers of 10 to 20 liters.
 Use a suitable pump (drum pump) or possibly use hose with a funnel with funnel located above the cooling

water inlet.

Hose between container, pump and cooling water inlet and also between cooling water outlet and container.

Standard

Alternative

Via the water inlet hose, fill the device with decalcifier (pump or hose). Set the set value to 10 °C; after the chiller
starts the water circuit can be filled. Circulate the decalcifier with the pump or continue to top up the decalcifier. Allow
the decalcifier to take effect (refer to table below). Drain the unit. Reconnect the device to the water supply and thor­oughly flush out (refer to table below).

Acting time

Continue the pump stage until most of the foamy reaction, usually at the start, has decayed. Generally,
this is achieved after about 20 to 30 minutes.

Decalcifier

LAUDA article number: LZB 126 (5 kg)
When handling the chemicals, the safety information and the instructions for use on the package are to
be followed.

Flushing

Allow at least 10 liters of water to flow through.

Cooling water connections

Interchange containers
when top one is empty

56 / 123 ECO Silver 09/2021

Before you contact the LAUDA Service Constant Temperature Equipment ( 8.7), check whether you can rectify
the problem yourself with the following instructions.

In doing so, follow all this safety information:

Warning!

Live parts when fault finding

Electric shock hazard

 Disconnect the device from the mains before the repair (e.g.

when changing components).

 Have the repair carried out only by a specialist.

Warning!

Rotating / live parts when removing the ventilator fan

Cuts, crushing, electric shock hazard

 Disconnect the device from the mains before the repair.
 Have the repair carried out only by a specialist.

Warning!

Uncontrolled start-up on release of jammed pump

Crushing, electric shock hazard

 Disconnect the device from the mains before the repair.
 Have the repair carried out only by a specialist.

Caution!

Critical temperature of device parts, heat transfer liquid or accesso-

ries (hoses)

Burns, scalds, frostbite

 Bring the device parts, accessories and heat transfer liquid to

room temperature before touching them.

 Have repairs carried out only by a specialist.
 Affix the symbol "Hot surface".

Fault

Possible remedy

Device does not cool

Dirty condenser  Clean condenser ( 8.3.4).
Temperature limit Til too high  Reduce temperature limit Til ( 7.4.5).

Device does not heat up

Temperature limit Tih too low  Increase temperature limit Tih ( 7.4.5).

Device does not pump

Check selector switch for proportioning external and internal pump flow ( 6.1);
pump blocked by foreign bodies.

8.4 Fault finding

09/2021 ECO Silver 57 / 123

The following applies for EU member states: The disposal of the device is regulated by
EC Directive 2012/19/EU (WEEE Waste of Electrical and Electronic Equipment).

Type and amount of the refrigerant used are stated on the rating label. Repair and disposal are only to be carried out
by specialists.

The following applies for EU member states: The disposal of the refrigerant must proceed according to EC Regula­tion 2015/2067/EU in conjunction with Regulation 517/2014/EU.

Caution!

Contact with hot / cold heat transfer liquid

Scalds, frostbite

 Bring the heat transfer liquid to room temperature before

draining.

 Drain the device and any accessories (e.g. hoses) before

packing thoroughly.

Caution!

Skin contact with hot / cold surfaces

Burns, frostbite

 Bring the surfaces to room temperature before touching

them.

Caution!

Uncontrolled escape of refrigerant / explosion

Crushing, impacts, cuts

 No disposal with cooling circuit under pressure.
 Only a specialist is permitted to take the device out of ser-

vice.

8.5 Disposal information

8.5.1 Disposal of the refrigerant

8.5.2 Disposal of the packaging

The following applies for EU member states: The disposal of the packaging must proceed according to the EC Directive
94/62/EC.

8.6 Taking the device out of service

The device must be taken out of service by a specialist. Comply with the following safety information:

58 / 123 ECO Silver 09/2021

Caution!

Falling / toppling equipment

Crushing of hands and feet, impacts

 Use the handles (grip heating thermostats underneath the

device).

When ordering replacement parts, please state the serial number (rating label); this helps to avoid queries and incor­rect deliveries.

Your contact for maintenance and expert service support.

LAUDA Service
Phone: [phone] (English and German)

Fax: [phone]
e-mail [e-mail]

We are available at any time for queries and ideas!

LAUDA DR. R. WOBSER GMBH & CO. KG
Laudaplatz 1
97922 Lauda-Königshofen
Germany
Phone: [phone]
Fax: [phone]
E-Mail [e-mail]
Internet http://www.lauda.de

8.7 Ordering replacement parts / LAUDA Service

09/2021 ECO Silver 59 / 123

Immersion thermostat

Accessories

Suitable for

Catalogue number

Cooling coil set (small)

ECO SILVER,
bath vessels up to 6 liters

LCZ 0720

Cooling coil set (large)

ECO SILVER,
bath vessels from 6 liters

LCZ 0721

Pump connection set (outflow and return nozzles) with fitting 13 mm
(plastic)

ECO SILVER

LCZ 0716

Pump connection set (pressure and return nozzles) with thread M16
x 1 (stainless steel) 2 fittings, 2 union nuts

ECO SILVER

LCZ 0717

Bath

vessels

Material

Maximum

temperature in

°C

Volume L

max.

Internal dimensions

mm x mm x mm

(W x D x H)

Catalogue number

6 T

Polycarbonate

100

6

130 x 420 x 160

LCZ 0703

12 T

Polycarbonate

100

12

300 x 315 x 160

LCZ 0704

15 T

Polycarbonate

100

15

416 x 130 x 310

LCZ 0705

20 T

Polycarbonate

100

20

300 x 490 x 160

LCZ 0706

B 4

Stainless steel

200

4

135 x 240 x 150

LCZ 0707

B 10

Stainless steel

200

11

300 x 329 x 150

LCZ 0708

B 15

Stainless steel

200

16

300 x 329 x 200

LCZ 0709

B 20

Stainless steel

200

19

300 x 505 x 150

LCZ 0710

B 25

Stainless steel

200

25

300 x 505 x 200

LCZ 0711

B 40

Stainless steel

200

40

300 x 750 x 200

LCZ 0712

Heating thermostats

Accessories

Suitable for

Catalogue number

Pump connection set (outflow and return nozzles) with fitting 13 mm
(plastic)

All heating thermostats

LCZ 0716

Pump connection set (outflow and return nozzles) with thread M16 x
1 (stainless steel)

All heating thermostats

LCZ 0717

Bath cover in stainless steel

E 10 S

HDQ 169

Bath cover in stainless steel

E 20 S, E 25 S

HDQ 170

Bath cover in stainless steel (three-part)

E 40 S

LCZ 0718

9 Accessories

Please take catalogue numbers for accessories from the following table.

60 / 123 ECO Silver 09/2021

Cooling coil set for ET 15

ET 15 S

LCZ 0719

Cooling thermostats

Accessories

Suitable for

Catalogue number

Pump connection set (outflow and return nozzles) with thread
M16 x 1 (stainless steel)

All cooling thermostats

LCZ 0717

For all devices

Accessories

Catalogue number

USB 2.0 cable (USB A male to mini B)

EKS 089

Upper module receptacle approx. 57 mm x 27 mm

Analog module

LRZ 912

RS 232/485 interface module

LRZ 913

Contact module with 1 input and 1 output

LRZ 914

Contact module with 3 inputs and 3 outputs

LRZ 915

Profibus module

LRZ 917

Ethernet USB interface module

LRZ 921

LiBus interface box

LCZ 9727

Upper module receptacle approx. 57 mm x 17 mm

Remote control unit Command*

LRT 927

External Pt100/LiBus module

LRZ 918

LiBus interface module

LRZ 920

* functions only in conjunction with LRZ 918

09/2021 ECO Silver 61 / 123

The figures were determined according to DIN 12876.
Data applicable to all ECO SILVER thermostats

Ambient temperature range

°C

5 – 40

Relative humidity

Maximum relative humidity 80% at 31 °C and decreasing linearly to

50% up to 40 °C.

Contamination level

2

Setting resolution

K

±0.01

Display resolution

K

±0.01

Accuracy of indication

K

±0.3 K and ±0.5 % of the relative measurement

Pump type/number of power levels

Pressure pump/6

Discharge pressure, max.

bar

0.55

Discharge flow, max.

L/min

22

Viscosity of heat transfer liquid

mm²/s

Heating range: maximum 150;

Control range: ≤ 30

Display field LCD display 3.0"; 128 x 64 pixel

Programmer

One program with a total of 20 temperature/time segments ( D)

Standard interface

USB

Class of protection

IP 21

Class designation

lII

Marking FL (suitable for flammable and non-flammable liquids)

Overvoltages

Overvoltage Category II and transient overvoltages according to

Category II.

Class of protection for electrical
operating equipment DIN EN
61140 (VDE 0140-1)

Class I

10 Technical data and graphs

62 / 123 ECO Silver 09/2021

Immersion thermostats

ECO SILVER

230 V

220 V

115 V

100 V

Working temperature range 

°C

20 – 200

Working temperature range with water cooling

°C

20 – 200

Operating temperature range 

°C

-20 – 200

Temperature stability K ±0.01

Heater rating

kW

2.0

1.9

1.3

1.0

Heater surface loading

W/cm²

6.8

6.2

6.8

5.1

Power consumption

kW

2.1

2.0

1.4

1.1

Bath depth

mm

At least 150

Overall dimensions
(W x D x H)

mm

130 x 135 x 325

Weight

kg

3.0

3.0

3.0

3.0

Mains connection

230 V ±10 %; 50/60 Hz

X

---

---

---

220 V ±10 %; 60 Hz

---

X

---

---

115 V ±10 %; 60 Hz

---

--- X ---

100 V ±10 %; 50/60 Hz

---

---

---

X

 at Pump power level 1
 with extraneous cooling

09/2021 ECO Silver 63 / 123

Heating thermostats with stainless steel bath

E 4 S

E 10 S

E 20 S

E 25 S

E 40 S

Working temperature range 

°C

20 – 200

Working temperature range with water
cooling

°C

20 – 200

Operating temperature range 

°C

-20 – 200

Temperature stability

K

±0.01

Bath volume

liters

3 – 3.5

7.5 – 10

13 – 19

16 – 25

32 – 40

Bath vessels

Inner tank in deep-drawn stainless steel 1.4301 conforming to

SAE 30304 AISI 304

Outer jacket

Powder-coated steel sheet

Bath opening (W x D) with control head

mm

135 x 105

300 x 190

300 x 365

300 x 365

613 x 300

Bath depth

mm

150

150

150

200

200

Usable bath depth

mm

130

130

130

180

180

Height of bath edge without cover

mm

196

196

196

246

248

Overall dimensions (W x D)

mm

168 x 272

331 x 361

331 x 537

331 x 537

350 x 803

Overall height (H)

mm

376

376

376

426

428

Weight

kg

6.6

8.6

11.8

13.1

17.2

Pump connection set
Plastic fittings Ø 13 mm

Standard

 Optional accessory

Mains connection Heater rating / power consumption

230 V ±10 %; 50/60 Hz

kW

2.0 / 2.1

220 V ±10 %; 60 Hz

kW

1.9 / 2.0

115 V ±10 %; 60 Hz

kW

1.3 / 1.4

100 V ±10 %; 50/60 Hz

kW

1.0 / 1.1

 at Pump power level 1
 with extraneous cooling
 optional accessories

64 / 123 ECO Silver 09/2021

Heating thermostats with transparent bath

ET 6 S

ET 12 S

ET 15 S

ET 20 S

Working temperature range 

°C

20 – 100

Working temperature range with water cooling

°C

20 – 100

Operating temperature range 

°C

-20 – 100

Temperature stability

K

±0.01

Bath volume

liters

5 – 6

9.5 – 12

13.5 – 15

15 – 20

Bath vessels

Polycarbonate

Bath opening (W x D) with control head

mm

130 x 285

300 x 175

275 x 130

300 x 350

Bath depth

mm

160

160

310

160

Usable bath depth

mm

140

140

290

140

Height of bath edge without cover

mm

169

208

356

208

Overall dimensions (W x D)

mm

143 x 433

322 x 331

428 x 148

322 x 506

Overall height (H)

mm

349

389

532

389

Weight

kg

4.1

6.4

6.4

7.6

Pump connection set
Plastic fittings Ø 13 mm

 Optional accessory

Standard

 Optional

accessory

Mains connection Heater rating / power consumption

230 V ±10 %; 50/60 Hz

kW

2.0 / 2.1

220 V ±10 %; 60 Hz

kW

1.9 / 2.0

115 V ±10 %; 60 Hz

kW

1.3 / 1.4

100 V ±10 %; 50/60 Hz

kW

1.0 / 1.1

 for Pump Power Level 1
 with extraneous cooling
 optional accessories

09/2021 ECO Silver 65 / 123

Cooling thermostats (1)

RE 415 S

RE 415 SW

RE 420 S

RE 630 S

Operating temperature, ACC *

°C

-15 – 200

-15 – 200

-20 – 200

-30 – 200

Ambient temperature range

°C

5 – 40

Temperature stability

K

±0.02

Maximum storage temperature

°C

43

with water-cooled devices the evaporator must be completely drained

Cooler Air

Water

Air

Air

Cooling water consumption @
15 °C temperature, pressure 3 bar

L/min

---

0.2

---

---

Cooling output at 20 °C
ambient temperature,
15 °C cooling water
temperature, 3 bar
cooling water pressure
and Pump Level 2

20 °C

W

180

200

300

10 °C

W

160

180

270

0 °C

W

120

150

240

-10 °C

W

80

100

190

-20 °C W 30 

30

100

-30 °C

W

20

Bath volume

liters

3.3 — 4

3.3 — 4

4.6 — 5.7

Bath opening (W x D)

mm

130 x 105

130 x 105

150 x 130

Bath depth

mm

160

160

160

Usable depth

mm

140

140

140

Height to top edge of bath

mm

365

374

400

Overall dimensions (W x D)

mm

180 x 350

180 x 396

200 x 430

Overall height (H)

mm

546

555

581

Weight

kg

19.6

20.5

21.6

27.2

Sound level (1 m)

dB(A)

50

Pump Connection Set Plastic fittings Ø 13 mm

Mains connection Heater rating / power consumption

230 V ±10 %; 50 Hz

kW

2.0 / 2.2

2.0 / 2.3

220 V ±10 %; 60 Hz

kW

1.9 / 2.1

1.9 / 2.2

115 V ±10 %; 60 Hz

kW

1.3 / 1.5

1.3 / 1.6

100 V ±10 %; 50/60 Hz

kW

---

1.0 / 1.2

1.0 / 1.3

*ACC range (Active Cooling Control) according to DIN 12876 is the working temperature range for operation with
an active refrigerating machine
 at bath temperature tb = -15 °C

66 / 123 ECO Silver 09/2021

Cooling thermostats (2)

RE 1225 S

RE 2025 S

RE 1050 S

Operating temperature, ACC *

°C

-25 – 200

-25 – 200

-50 – 200

Ambient temperature range

°C

5 – 40

Temperature stability

K

±0.02

Maximum storage temperature

°C

43

Cooler Air

Air

Air

Cooling output at 20 °C
ambient temperature,
15 °C cooling water
temperature,
3 bar cooling water
pressure and Pump
Level 2

20 °C W 300

300

700

10 °C W 270

260

660

0 °C W 240

230

600

-10 °C W 180

150

520

-20 °C W 90

60

350

-25 °C W 40

30

---

-30 °C W 190

-40 °C W 100

-50 °C W 20

Bath volume

liters

9.3 – 12

14 – 20

8 – 10

Bath opening (W x D)

mm

200 x 200

300 x 350

200 x 200

Bath depth

mm

200

160

160

Usable depth

mm

180

140

140

Height to top edge of bath

mm

443

443

443

Overall dimensions (W x D)

mm

250 x 435

350 x 570

280 x 440

Overall height (H)

mm

624

624

624

Weight

kg

30

37

34.6

Sound level (1 m)

dB(A)

50

50

52

Pump Connection Set Plastic fittings Ø 13 mm

Mains connection Heater rating / power consumption

230 V ±10 %; 50 Hz

kW

2.0 / 2.3

2.0 / 2.7

220 V ±10 %; 60 Hz

kW

1.9 / 2.2

1.9 / 2.6

115 V ±10 %; 60 Hz

kW

1.3 / 1.6

1.3 / 1.8

100 V ±10 %; 50/60 Hz

kW

1.0 / 1.3

1.0 / 1.7

*ACC range (Active Cooling Control) according to DIN 12876 is the working temperature range for operation with an
active chiller
Technical modifications reserved

09/2021 ECO Silver 67 / 123

Unit

RE 415 S

RE 415 SW

RE 420 S

RE 630 S

Refrigerant

---

R-134a

R-134a

R-134a

maximum filling quantity

kg

0.065

0.063

0.075

GWP

(100a)

*

---

1430

1430

1430

CO2 equivalent

t

0.1

0.1

0.1

Unit

RE 1225 S

RE 2025 S

RE 1050 S

Refrigerant

---

R-134a

R-134a

R-452A

maximum filling quantity

kg

0.075

0.075

0.27

GWP

(100a)

*

---

1430

1430

2140

CO2 equivalent

t

0.1

0.1

0.6

Unit

RE 415 S

RE 415 SW

RE 630 S

RE 1225 S

RE 2025 S

Refrigerant

---

R-134a

R-134a

R-134a

R-134a

maximum filling quantity

kg

0.058

0.057

0.057

0.063

GWP

(100a)

*

---

1430

1430

1430

1430

CO2 equivalent

t

0.1

0.1

0.1

0.1



Global Warming Potential (GWP),
Comparison CO2 = 1,0

* Time span 100 years - according to IPCC IV

Refrigerant and Filling quantity

The cooling thermostat contains fluorinated greenhouse gases.

Voltage version 115 V; 60 Hz

68 / 123 ECO Silver 09/2021

0

0,1

0,2

0,3

0,4

0,5

0,6

0 5 10 15 20 25 30

Förderstrom [L/min]

Förderdruck [bar]

Pumpenkennlinien

gemessen mit Wasser

Stage 6

Stage 5

Stage 4

Stage 3

Stage 2

Stage 1

ET 6 S

ET 12 S

ET 15 S

ET 20 S

Heat transfer liquid:

Water,

bath closed

Pump characteristics
measured with water

Heating time in h:min

Flow rate in L/min

Bath temperature in °C

Discharge pressure in bar

Pump characteristic ECO

Heating curve for ECO SILVER heating thermostats (230 V; 50/60 Hz) with transparent bath

09/2021 ECO Silver 69 / 123

E 4 S

E 10 S

E 20 S

E 25 S

RE 1050

RE 630

RE 1225

RE 2025

Heat transfer liquid:
Ethanol,
bath closed

Cooling time in h:min

Bath temperature in °C

RE 420

RE 415 (W)

Heat transfer liquid:
Therm 240,
bath closed

Heating time in h:min

Bath temperature in °C

Heating curve for ECO SILVER heating thermostats (230 V; 50/60 Hz) with stainless steel bath

Cooling curves for ECO cooling thermostats

70 /

123

ECO Silver

09

/2021

11 Declaration of Conformity

09/2021

ECO Silver

71 / 123

72 / 123 ECO Silver 09/2021

12 Index

A

Accessories ........................................................................ 59

Acoustic signals ................................................................. 78

Alarms .................................................................. 48, 49, 83

Ambient temperature ....................................................... 61

Analog module ............................................................ 12, 99

Assembly ............................................................................ 21

Autostart ............................................................................ 79

B

Emptying ............................................................................ 29

Entry window ..................................................................... 44

Error ................................................................................... 48

Error messages .................................................................. 48

Error store .......................................................................... 50

EXT ..................................................................................... 25

External consumer ............................................................ 22

External control ................................................................. 87

External temperature sensor ............................................ 12

F

Basic window ..................................................................... 42

C

Calibration ......................................................................... 80

Chiller .......................................................................... 12, 78

Circuit breaker................................................................... 35

Cleaning ............................................................................. 52

Condenser ......................................................................... 54

Contact Module .......................................................12, 115

Control panel ..................................................................... 14

Control parameters ........................................................... 94

Cooling Coil ....................................................................... 22

Cooling curves ................................................................... 69

Cooling the heating thermostats ..................................... 35

Cooling thermostat ........................................................... 24

Cooling water .................................................................... 31

Cooling water circruit ....................................................... 54

Correcting quantity limit .................................................. 95

Curr.Consumpt. ................................................................ 79

Cursor keys ........................................................................ 14

D

Damping............................................................................. 94

Damping time .................................................................... 95

Decalcifying ....................................................................... 55

Derivative time ........................................................... 94, 95

Device data ........................................................................ 50

Device status ..................................................................... 50

Device type ........................................................................ 51

Display brightness ............................................................. 79

Display representation ...................................................... 42

Disposal ....................................................................... 32, 57

Drain tap ............................................................................ 30

E

EMC standard DIN EN 61326-1 ................................... 7

Factory calibration ............................................................ 81

Factory settings ................................................................. 77

Filling .................................................................................. 29

Filling quantity ................................................................... 67

Flow distribution (pump) .................................................. 25

G

Gain .................................................................................... 95

H

Heat transfer liquid ........................................................... 53

changing ......................................................................... 30

draining .......................................................................... 30

Heat transfer liquids .......................................................... 31

Heating curve ............................................................. 68, 69

Heating thermostat ........................................................... 23

Hoses.................................................................................. 31

I

Immersion thermostat ...................................................... 21

INT ...................................................................................... 25

Interfaces .................................................................... 12, 98

K

Key lock .............................................................................. 82

Kpe...................................................................................... 95

L

Labview ............................................................................. 113

Language ............................................................................ 47

LiBus ................................................................................. 102

Loops .................................................................................. 93

Low level ............................................................................. 49

M

Mains connection .............................................................. 35

09/2021 ECO Silver 73 / 123

Maintenance ...................................................................... 48

Menu structure .................................................................. 41

Menu window ..................................................................... 43

O

Offset, temperature sensor .............................................. 80

Operating controls ............................................................ 13

Operation ........................................................................... 38

Ordering replacement parts ............................................. 58

Overtemperature protection ............................................ 48

Overtemperature switch-off point ........................... 14, 44

P

Profibus Module ................................................................ 12

Programmer ....................................................................... 89

Prop_E ................................................................................ 95

Proportional range ...................................................... 94, 95

Pt100/LiBus module ..................................................... 103

Pump .................................................................................. 11

Pump characteristic .......................................................... 68

Pump Connection Set ...................................................... 26

Pump level .......................................................................... 46

R

Refrigerant ......................................................................... 67

Filling quantity ............................................................... 67

Repair ................................................................................. 52

Reset time ................................................................... 94, 95

RS 232/485 interface module ............................. 12, 100

Setpoint offset ................................................................... 88

Set-point, bath temperature ............................................ 45

Soft key ............................................................................... 14

Software version ................................................................ 51

Standby ............................................................................... 46

Starting mode ..................................................................... 79

T

Td 94

Tde ....................................................................................... 95

Technical data .................................................................... 61

Temperature

ambient temperature .................................................... 21

room temperature ......................................................... 21

set-point value ............................................................... 45

Temperature limits ............................................................. 47

Tn 94

Tne....................................................................................... 95

Tv 94

Tve ....................................................................................... 95

Type..................................................................................... 51

U

UK plugs ............................................................................. 35

Unpacking ........................................................................... 19

USB interface .......................................................... 11, 104

V

Viscosity ............................................................................. 61

S

Safety ..................................................................................... 6

Safety information ................................................................ 6

Screw clamp ....................................................................... 21

Screw-in sieve .................................................................... 54

Serial numbers ................................................................... 51

Servicing ............................................................................. 52

Servicing intervals.............................................................. 53

W

Warnings ..................................................................... 48, 83

X

Xp ........................................................................................ 94

Xpf ....................................................................................... 95

74 / 123 ECO Silver 09/2021

09/2021 ECO Silver 75 / 123

76 / 123 ECO Silver 09/2021

Appendix with settings

09/2021 ECO Silver 77 / 123

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Factory Setting.

The adjacent menu window appears.

– Select the menu item all default.
– Select one of the following options:

Selecting no returns to the previous display without making any changes.

– Selecting yes restores the factory settings if you confirm this

with the enter key.

– By selecting Control you can select the displayed parameters

with or .

Select the appropriate menu item in the parameter list.

– The internal and the external control parameters can be reset

using Control parameter.

– The settings for the internal sensor can be reset with

internal Pt100.

– With miscellaneous the following can be reset: set value, pump

level, max. current consumption, control to internal and auto­start to "auto".

Select one of the following options:

– Selecting no returns to the previous display without making any

changes.

– Selecting yes resets the selected parameter if you confirm this

with the enter key.

–

By pressing or (ESC) you are returned to the menu level without any change.

ESC  OK STOP

all default

Control

ESC  OK STOP

Control parameter

internal Pt100
miscellaneous

ESC  OK STOP

no .

yes

The adjustments described in this appendix are only intended for specially qualified personnel.

A Other settings

A.1 Resetting to factory settings

78 / 123 ECO Silver 09/2021

The ECO SILVER thermostats sound alarms and faults as a two-tone acoustic signal. Warnings a signaled as a contin­uous tone,

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Basic setup 

Sounds.

– Choose Alarm, Warn or Error.

The adjacent menu window appears.

– The volume is selected with or . The selected level is imme-

diately active without confirmation. (In this example the volume
is medium)

–

By pressing (ESC), or you are returned to the menu level without any change.

The chiller of the cooling thermostats is normally operated in the "automatic" operating mode. Here, the cooling unit
switches on or off automatically depending on the temperature and operating status. However, you can also switch the
cooling unit on or off manually.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Cooling.

The adjacent menu window appears.

– With or and you select and confirm the operating sta-

tus "off", "on" or "automatic".

– In the menu the set operating status is displayed by

a tick .

–

By pressing or (ESC) you are returned to the menu level without any change.

– Note: When the cooling unit is switched off, it can take up to two minutes before it switches on again.

ESC  OK STOP

loud

medium 

low
off
ESC  OK STOP

off

on .

automatic 

A.1 Setting the volume of the acoustic signals

12.1 Setting the chiller

09/2021 ECO Silver 79 / 123

The ECO range of thermostats have a sensor which automatically adapts the display brightness according to the ambi­ent light level. However, the automatic adaptation can be deactivated and the brightness set manually.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Basic setup 

Display  Brightness.

The adjacent menu window appears.

– Select "automatic", "level" or "off" with or . The selected

level is immediately active without confirmation.

–

By pressing (ESC), or you are returned to the menu level without any change.

Generally, it is required that the thermostat starts operating again after a power interruption. For reasons of safety, for
example, you can insert a manual activation step.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Basic setup 

Autostart.

The adjacent menu window appears.

– Select the operating status "off" or "on" with or and con-

firm with .

– If "off" is selected, standby operation is activated after a mains

interruption.

– With the setting "on" the device continues running straight af-

ter the mains interruption.

–

By pressing or (ESC) you are returned to the menu level without any change.

If your mains fusing is below 16 A, the current consumption can be reduced in steps from 16 A to 8 A. The maximum
heating power is reduced correspondingly. Here, take into consideration whether other loads are connected to the
same fused circuit or whether your ECO thermostat is the only load.

– You activate the soft-key bar by pressing any key.

ESC  OK STOP

automatic
Stage 5
Stage 4

Stage 3 .

Stage 2

ESC  OK STOP

off

on .

12.2 Setting the display brightness

12.3 Defining the starting mode (Autostart)

12.4 Limiting the mains current consumption

80 / 123 ECO Silver 09/2021

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup 

Basic setup  Curr.Consumpt..

The entry window appears.

– Change the value with or .
– Single figures can be selected by pressing or .
– Confirm the input with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

Deviations to the calibrated reference thermometers (e.g. LAUDA DigiCal) can be corrected internally by the "Off­set" function.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Calibration.

The adjacent menu window appears.

– Select Calibration with or and confirm with .

The entry window appears. The value indicated on the reference ther­mometer must be entered as the value.

– Change the value with or .
– Single figures can be selected by pressing or .
– By pressing (+/-) the arithmetic sign can be changed.
– You confirm the set value by pressing .

– By pressing (ESC) you are returned to the menu level without any change.

Curr.Cons.
Min: 8.00 Max: 16.00

ESC  OK - - -

16.00

Temp. ref. device
Min: -22.02Max: 28.02

ESC  OK + / -

25.02

ESC  OK STOP

Calibration

Factory calibration

12.5 Entering the offset of the displayed temperature (calibration)

09/2021 ECO Silver 81 / 123

If the offset has been adjusted, the factory setting can be restored again.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the en-

ter key .

– Selection and confirmation of  Setup  Calibration.
– The adjacent menu window appears.
– Select and confirm factory calibration with or and .

The adjacent menu window appears.

– Select "yes" using or and confirm with to restore the

factory settings.

–

By pressing "no" (ESC) or you are returned to the menu level without any change.

ESC  OK STOP

Calibration .

Factory calibration

ESC  OK STOP

no

yes

12.6 Restoring the factory setting of the internal temperature sensor (factory calibration)

82 / 123 ECO Silver 09/2021

The entry key and arrow keys on the control panel on the device can be locked.
This can be done directly using the control keys on the device or by using write commands provided by an interface module

(for example RS 232/485 module, Ethernet USB module, or contact module).
When the device is being controlled using a process control system, it is important to be able to lock the control keys on

the device.

Activating the key lock with the control keys:
It is possible to lock the keys when it is in "standby" or "running" operating

mode and the home screen or graph window is displayed.

– Press the input key and keep it pressed.
– Press the down key and keep it pressed.
– After four seconds, the key lock is activated.

In the softkey bar, the middle softkey, "Menu", and the softkey on the right,
"STOP", are hidden. The functions associated with them are no longer avail­able.

The softkey on the left continues working. This is used to switch the display
between the home screen and the graph window.

The overtemperature switch-off point can be viewed, but not changed, using

the Tmax key.

Deactivating the key lock with the control keys:

– Press the input key and keep it pressed.
– Press the up key and keep it pressed.
– After four seconds, the key lock is deactivated.

The functions associated with the softkey bar and the Tmax key are all availa­ble again.

29.73 °C

1 30.00 °C T

set

T

int

DISPLAY  --- ---

12.7 Key lock

09/2021 ECO Silver 83 / 123

Alarm code

Meaning

1

Low Level Pump

Pump runs too fast (low level)

2

Low Level Pump

Low level in the float

3

Overtemperature

Overtemperature (T > Tmax)

4

Pump blocked

Pump blocked (standstill)

5

Connection Command

Remote control unit command triggered in running operation

9

T ext Pt100

External Pt100 actual value is not present.

10

T ext analog

External analog actual value is not present.

11

T ext serial

External serial actual value is not present.

12

Input Analog 1

Analog module: Current interface 1, interruption.

13

Input Analog 2

Analog module: Current interface 2, interruption.

15

Digital Input

Error on digital input

Code

0XX Control system

Meaning

Code

3XX SmartCool

Meaning

1

CAN receive overf

Overflow during CAN reception

1

CAN receive overf

Overflow during CAN reception

2

Watchdog Reset

Watchdog reset

2

Watchdog Reset

Watchdog reset

3

T_il limit active

til llmit active

3

adaption missing

No adaption run

4

T_ih limit active

tih llmit active

4

Pressure switch
activated

Pressure Switch in cooling circuit trig­gered

5

corrupt parameter

Inadmissible internal parameter

5

Clean condenser

Clean condenser

6

corrupt progr

Inadmissible programmer data

6

TO1 range Klixon

Injection temperature outside value
range

7

Invalid Parameter

Inadmissible parameter in memory

7

Invalid Parameter

Inadmissible parameter in memory

8

CAN system

Problem during internal data interchange

8

CAN system

Problem during internal data interchange

9

Unknown Modul

Unknown module connected

9

Unknown Modul

Unknown module connected

10

SW control too old

Software version of control panel too old

10

SW control too old

Software version of control panel too old

11

SW safety too old

Software version of protection too old

11

SW safety too old

Software version of protection too old

12

SW command too old

Software version of command remote
control unit too old

12

SW command too old

Software version of command remote
control unit too old

13

SW cool too old

Software version of cooling module too
old

13

SW cool too old

Software version of cooling module too
old

14

SW analog too old

Software version of analog too old

14

SW analog too old

Software version of analog too old

15

SW serial too old

Software version of RS 232 too old

15

SW serial too old

Software version of RS 232 too old

16

SW contact old

Software version of contact module too
old

16

SW contact old

Software version of contact module too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

26

SW HTC old

Software version of high temperature
cooler too old

26

SW HTC old

Software version of high temperature
cooler too old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

B List of "Alarm and warning codes"

Alarms

Warnings

84 / 123 ECO Silver 09/2021

33

RTC wrong data

Internal clock defective

33

valve sm0 break

Cable of injection valve 0 defective

41

wrong net voltage

Incorrect mains voltage setting

34

valve sm1 break

Cable of injection valve 1 defective

42

no eco type

Device type not configured

35

valve sm2 break

Cable of injection valve 2 defective

43

no eco voltage

Mains voltage not configured

36

valve sm3 break

Cable of injection valve 3 defective

44

chiller missing

Chiller not running

37

output sm0

Triggering of injection valve 0 defective

45

Diff.voltages

Different mains voltage configured (head
and cooling underpart)

38

output sm1

Triggering of injection valve 1 defective

46

# of heaters

Setting the heater configuration

39

output sm2

Triggering of injection valve 2 defective

40

output sm3

Triggering of injection valve 3 defective

41

sm0 min too small

Start value of injection valve too small

42

no eco type

Device type not configured

43

no eco voltage

Mains voltage not configured

44

chiller missing

Chiller not running

Code

1XX Safety system

Meaning

Code

2XX Command

Meaning

1

CAN receive overf

Overflow during CAN reception

1

CAN receive overf

Overflow during CAN reception

2

Watchdog Reset

Watchdog reset

2

Watchdog Reset

Watchdog reset

5

Heat 1 failed

Heater 1 defective

3

Clock Error

Battery fault

6

Heat 2 failed

Heater 2 defective

9

Unknown Modul

Unknown module connected

7

Invalid Parameter

Inadmissible parameter in memory

10

SW control too old

Software version of control panel too old

8

CAN system

Problem during internal data interchange

11

SW safety too old

Software version of protection too old

9

Unknown Modul

Unknown module connected

12

SW command too old

Software version of command remote
control unit too old

10

SW control too old

Software version of control panel too old

13

SW cool too old

Software version of cooling module too
old

11

SW safety too old

Software version of protection too old

14

SW analog too old

Software version of analog too old

12

SW command too old

Software version of command remote
control unit too old

15

SW serial too old

Software version of RS 232 too old

13

SW cool too old

Software version of cooling module too
old

16

SW contact old

Software version of contact module too
old

14

SW analog too old

Software version of analog too old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

15

SW serial too old

Software version of RS 232 too old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

16

SW contact old

Software version of contact module too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

26

SW HTC old

Software version of high temperature
cooler too old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

26

SW HTC old

Software version of high temperature
cooler too old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

09/2021 ECO Silver 85 / 123

Code

4XX Analog module

Meaning

Code

5XX Serial
(RS 232/485)

Meaning

1

CAN receive overf

Overflow during CAN reception

1

CAN receive overf

Overflow during CAN reception

2

Watchdog Reset

Watchdog reset

2

Watchdog Reset

Watchdog reset

9

Unknown Modul

Unknown module connected

9

Unknown Modul

Unknown module connected

10

SW control too old

Software version of control panel too old

10

SW Contr. too old

Software version of control panel too old

11

SW safety too old

Software version of protection too old

11

SW safety too old

Software version of protection too old

12

SW command too old

Software version of command remote
control unit too old

12

SW command too old

Software version of command remote
control unit too old

13

SW cool too old

Software version of cooling module too
old

13

SW cool too old

Software version of cooling module too
old

14

SW analog too old

Software version of analog too old

14

SW analog too old

Software version of analog too old

15

SW serial too old

Software version of RS 232 too old

15

SW serial too old

Software version of RS 232 too old

16

SW contact old

Software version of contact module too
old

16

SW contact old

Software version of contact module too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

26

SW HTC old

Software version of high temperature
cooler too old

26

SW HTC old

Software version of high temperature
cooler too old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

Code

6XX Switch contacts

Meaning

Code

7, 8, 9, 10, 11,
16XX Solenoid valve

Meaning

1

CAN receive overf

Overflow during CAN reception

1

CAN receive overf

Overflow during CAN reception

2

Watchdog Reset

Watchdog reset

2

Watchdog Reset

Watchdog reset

9

Unknown Modul

Unknown module connected

3

No cooling liquid

No cooling liquid present (HTC)

10

SW Contr. too old

Software version of control panel too old

6

no unfill liquid too hot

No draining, because bath temperature
is too hot (HTC)

11

SW safety too old

Software version of protection too old

9

Unknown Modul

Unknown module connected

12

SW command too old

Software version of command remote
control unit too old

10

SW Contr. too old

Software version of control panel too old

13

SW cool too old

Software version of cooling module too
old

11

SW safety too old

Software version of protection too old

14

SW analog too old

Software version of analog too old

12

SW command too old

Software version of command remote
control unit too old

15

SW serial too old

Software version of RS 232 too old

13

SW cool too old

Software version of cooling module too
old

16

SW contact old

Software version of contact module too
old

14

SW analog too old

Software version of analog too old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

15

SW serial too old

Software version of RS 232 too old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

16

SW contact old

Software version of contact module too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

17

SW Valve 0 old

Software version of solenoid valve 0 too
old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

18

SW Valve 1 old

Software version of solenoid valve 1 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

19

SW Valve 2 old

Software version of solenoid valve 2 too
old

86 / 123 ECO Silver 09/2021

Code

6XX Switch contacts

Meaning

Code

7, 8, 9, 10, 11,
16XX Solenoid valve

Meaning

26

SW HTC old

Software version of high temperature
cooler too old

20

SW Valve 3 old

Software version of solenoid valve 3 too
old

27

SW Ext Pt100 old

Software version of external Pt100 too
old

21

SW Valve 4 old

Software version of solenoid valve 4 too
old

26

SW HTC old

Software version of high temperature
cooler too old

27

SW Ext Pt100 old

Software version of external Pt100 too
old Code

17XX Pt100/LiBus Module

Meaning

1

CAN receive overf

Overflow during CAN reception

2

Watchdog Reset

Watchdog reset

3

Ext_Pt_short

Line short on external t100

7

Invalid Parameter

Inadmissible parameter in memory

8

CAN system

Problem during internal data interchange

9

Unknown Modul

Unknown module connected

10

SW Contr. too old

Software version of control panel too old

11

SW safety too old

Software version of protection too old

12

SW command too old

Software version of command remote control unit too old

13

SW cool too old

Software version of cooling module too old

14

SW analog too old

Software version of analog too old

15

SW serial too old

Software version of RS 232 too old

16

SW contact old

Software version of contact module too old

17

SW Valve 0 old

Software version of solenoid valve 0 too old

18

SW Valve 1 old

Software version of solenoid valve 1 too old

19

SW Valve 2 old

Software version of solenoid valve 2 too old

20

SW Valve 3 old

Software version of solenoid valve 3 too old

21

SW Valve 4 old

Software version of solenoid valve 4 too old

26

SW HTC old

Software version of high temperature cooler too old

27

SW Ext Pt100 old

Software version of external Pt100 too old

09/2021 ECO Silver 87 / 123

The devices can also be optionally controlled via an external Pt100 temperature sensor, which can be connected at the
back of the control head. It is necessary to install an external Pt100/LiBus module ( F) for external control. The
module is available as an accessory ( 9).

Furthermore, the signal coming from an analog or serial module can also be controlled. Analogue module and contact
modules are available as accessories ( 9).

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Control 

Contr. Variable.

The adjacent menu window appears.

– The menu item extern Pt100 only appears when the module

for an external connection is available. A temperature sensor
has to be connected to the module.

– Select and confirm extern Pt100 with or and .

–

By pressing or (ESC) you are returned to the menu level without any change.

Note: To show the selected control variable on the display, carry out chapter ( C.1).

Connection of the external Pt100 to Lemo socket 10S ( F.5)

Note: This setup must be done so that the control variable (which was selected in chapter B.1) is displayed in the basic
window.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Basic setup 

 Display  Displayed T-ext.

The adjacent menu window appears.
The different menu items only appear when the module is available (e.g.

Temp. ext. Pt100).

– Select and confirm Temp. ext. Pt100 with or and .
–

By pressing or (ESC) you are returned to the menu level without any change.

ESC  OK STOP

intern Pt100 

extern Pt100

extern analog
extern seriell
extern USB

ESC  OK STOP

Temp. ext. Pt100 

Temp. ext. anal.

Temp. ext. serial
Temp. ext. USB

C External control

B.1 Activating external control (external Pt100)

C.1 Show the selected control variable (external temperature) on the display

88 / 123 ECO Silver 09/2021

It is possible to apply an offset value to the temperature, which is provided by an external temperature sensor and to
process it as the set value.
The bath temperature can therefore be operated, for example, -15 °C below the temperature of a reactor measured by
the external temperature sensor.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Control 

Setpoint offset.  Offset source.

The adjacent menu window appears.

– Select and confirm offset source with or and .
– The setpoint offset is deactivated with "off".
– The entry window appears on selecting the menu point

Diff.set/actual.

The minimum and maximum possible offset values and the current offset
value are displayed.

– Change the value with or .
– Single figures can be selected by pressing or .
– By pressing (+/-) the arithmetic sign can be changed.
– Confirm your choice with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

Offset value
Min: -500.0 Max: 500.0

ESC  OK + / -

-15.0

ESC  OK STOP

off

extern Pt100

extern USB

D.1 Setpoint offset operating mode (Diff.set/actual)

09/2021 ECO Silver 89 / 123

The programming function enables you to save a temperature/time programs. The program consists of a number of
temperature/time segments and details about their repetition. The total number of freely programmable segments is 20.
Temperature step changes (time is zero) or also temperature retention phases for the same start and end temperatures
in the segment are possible. On starting the current set value is taken as the starting value of the first segment.

Changes to the pump level are entered in the relevant line. If the pump level is to remain unchanged, "0" is entered
(display shows "---").

The graph shows as an example the reprogramming of a
set-point temperature trace.

Cooling time dependent on device type, consumer, etc.

Example seg. no. 2:  "reach 50 °C within 20 minutes"

before (____)

Tend

hh:mm

Tol.

Pmp

S1

S2

S3 1 30.00

----

0.1

1 2

off

off

off 2 50.00

00:20

0.0

2 2

off

off

off 3 70.00

00:40

0.0

3 3

off

off

off 4 70.00

00:10

0.1

4 4

off

off

off 5 60.00

00:30

0.0

5 2

off

off

off 6 30.00

00:00

0.0

6 2

off

off

off

after (- - - - , edited)

Tend

hh:mm

Tol.

Pmp

S1

S2

S3

1

30.00

----

0.1

1 2

off

off

off

2

50.00

00:20

0.0

2 2

off

off

off

3

50.00

00:20

0.1

3 3

off

off

off

4

70.00

00:20

0.0

4 4

off

off

off 5 70.00

00:10

0.8

5 2

off

off

off 6 60.00

00:30

0.0

6 2

off

off

off 7 30.00

00:00

0.0

7 2

off

off

off

D Programmer

12.8 Programming example

The original values ("before" table) are illustrated with a continuous line and the edited trace ("after") table with a broken
line.
In the edited table a new segment has been  entered, and , tolerance  and pump level  have been changed (

12.9).

90 / 123 ECO Silver 09/2021

The tolerance entry can have a large effect with external
bath control. The adjacent graph of the edited trace shows
the possible run-on of the actual temperature in the bath
vessel (continuous line) for the set-point temperature of the
programmer (highlighted in gray).

Note:

 The tolerance field facilitates exact conformance to

the dwell time at a specified temperature. The fol­lowing segment is only processed when the actual
temperature reaches the tolerance band , so that
for example the ramp of segment 2 is only started
delayed by .

 A tolerance range which is too tight can however also cause undesired delays. In particular with exter-

nal control the range should not be chosen too tightly. In Segment 5 a larger tolerance has been en­tered, so that the desired time of ten minutes is maintained even with settling action .

 Only flat (slow) ramps should be programmed where necessary with a tolerance range. Steep ramps

which lie close to the maximum possible heating or cooling rates of the thermostat may be severely de­layed by a tolerance range that is too tight (here in Segment 2) .

Note:
No time specification is possible in the start segment (No. 1). The temperature of the first segment is attained as quickly as

possible in order to switch to segment 2 after reaching the set tolerance.

In the following functions are explained below:

 Creating and editing a program.
 Insert or append a new segment.
 Delete a segment.

Note:

 New segments and be inserted and existing ones changed, even when a program is currently being executed. Fur-

thermore, except for the currently active segment, all segments can be deleted at any time.

 Changes to the currently running segment are possible. The segment is continued as though the change has been

valid since the start of the segment.

 If the new segment time is shorter than the already expired segment time,

then the program skips to the next segment.

 If a segment time is required > 999h:59 min, then this time must be spread over several consecutive segments.

12.9 Creating and editing a program

09/2021 ECO Silver 91 / 123

Creating and editing a program:

Compare the programming example ( 12.8)

– You access the editor view of the programmer by selecting and

confirming  Programmer  Edit. To view the complete win­dow information go to the right with .

– With the keys , , and you obtain access to the individual

segment fields.

– If the cursor is located in the first column, the functions "new" and

"delete" are visible in the soft-key bar. Program steps can be creat­ed or deleted in this way.

– With all other cursor positions the function "OK" is visible in the

soft-key bar.

– Using (OK) you can select the appropriate parameters and

change them with or .

– You can quit the edit window at any time without changes using (ESC). When the cursor is located on a segment

number, using you return to the menu level of the programmer without changes.

Note: No time specification is possible in the start segment. The temperature of the first segment is attained as quickly as
possible in order to switch to segment 2 after reaching the set tolerance.

The programmer edit window contains the following parameters:

The segment number of the program is located in the first column.
Tend: Final temperature to be attained
hh:mm: Time in hours (hh) and minutes (mm) in which the specified temperature is to be attained.
If the value "0:00" is entered in the field "hh:mm", the set value is accepted immediately

and the bath temperature approached as quickly as possible.
Tol.: Defines how exactly the final temperature is to be attained before the next segment it processed.

If the tolerance range is selected too small in the "Tol." field, the program might not continue, because the

required tolerance is not achieved.
Pmp: Pump level at which the segment is to be processed.
S1, S2, S3: Switching contacts of the contact module (if present) can be programmed here. Contact modules are availa-

ble as accessories ( 9). The setting "- -" stands for no change to the preceding segment, i.e. if "- -" is pre-

sent in all fields, the contact setting of the start setup or that before the program start is retained.

– Inserting a new segment

–

– With or go to the segment number under which the new seg-

ment is to be inserted.

– The new segment is inserted on pressing (new). You can edit it as

described above.

– Deleting a segment

Tend

hh:mm

Tol.

1

35.00

--:--

0.1

2

40.00

00:10

0.1

3

50.00

00:20

0.0

4

70.00

00:50

0.1

ESC  NEW DELETE

Pmp

S1

S2

S3

1

1

on

- - -

off

2

1

on

- - -

off

3

2

on

- - -

off 4 2

on

- - -

off

ESC  OK - - -

Tend

hh:mm

Tol.

1

35.00

--:--

0.1

2

40.00

00:10

0.1

3

50.00

00:20

0.0

4

70.00

00:50

0.1

ESC  new DELETE

92 / 123 ECO Silver 09/2021

–

– With or go to the segment to be deleted.
– The new segment is removed on pressing (delete).

– You activate the soft-key bar by pressing any key.

– The submenu Status appears by selecting and confirming 

Programmer.

– With the menu Status you can carry out the following with the

commands
Start Start program
Hold Hold program
Continue Continue program

Stop Terminate program

by pressing the enter key .

– You can also pause the programmer with (STOP). When

"Standby" is deactivated, the programmer continues running.

Instructions which cannot be executed due to the situation are not dis­played. Continue therefore only appears if Hold has been activated.

If the programmer is in operation, with an active soft-key bar this is
indicated at the lower right.

– After the program start the menu points Hold and stop are

displayed.

– The options can be selected with or .
– Hold Interrupt program
– Stop Terminate program
– Confirm your choice with the enter key .

Tend

hh:mm

Tol.

1

35.00

--:--

0.1

2

40.00

00:10

0.1

3

50.00

00:20

0.0

4

70.00

00:50

0.1

ESC  NEW DELETE

ESC  OK STOP

Status

Edit
Loops

ESC  OK STOP

Start .

ESC  OK STOP

Hold

Stop

29.73 °C

T

ext

1

29.85 T

int

30,00 T

set

DISPLAY  MENU PROG.

12.10 Starting the program

12.11 Interrupting, continuing or terminating the program

09/2021 ECO Silver 93 / 123

To continue a program held by Hold

– Select the option Continue with or .
– Confirm your choice with the enter key .

– Also (STOP) holds the programmer. Pump, heating and chiller are switched off.
– When (STOP) is pressed again, the programmer returns to the previously selected operating mode (Hold

or active operation):

Programs can be processed many times.

– The submenu  Loops appears by selecting and confirming

 Programmer.

– Select and confirm Loops with or and .
– Enter the desired number with or .
– Confirm your choice with the enter key .

Note: To enter two or three-figure numbers move the cursor to the
appropriate point and change the figures with or .
If "0" is entered, the program is continuously repeated.

– By pressing (ESC) you are returned to the menu level without any change.

ESC  OK STOP

Continue

Stop

ESC  OK STOP

Status
Edit

Loops .

Loops (0, endlessly)
Min: 0 Max: 250

ESC  OK - - -

1

12.12 Defining the number of program loops (Loops)

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The control parameters have been optimized at the factory for operation as a bath thermostat (with water as the heat
transfer liquid) with internal control. The standard parameters are already set as default also for the thermostatic
control of external applications with external control.
Depending on the application, the configuration can be adapted from case to case as required. Also the thermal
capacity and the viscosity of the heat transfer liquid affect the control behavior.

Note:

Only change the control parameters if you have adequate knowledge of control techniques.

If you have not connected any temperature sensor, read further here. For activated external control read ( 12.14).

The control corresponds to the set-point temperature with the current bath temperature and calculates the set value for
heating or cooling.

These control parameters can be set:

Description

Short form

Unit

Proportional range

Xp

K

Reset time

Tn

s

Derivative time

Tv

s

Damping

Td

s

If "Tv manual/auto" is set to "a" (automatic), Tv and Td cannot be changed. They are in this case derived from Tn with
fixed factors.

Consider the effect of the temperature limits Tih and Til ( 7.4.5) on the control.

– You activate the soft-key bar by pressing any key.

– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Control 

Contr.parameter  intern Pt100.

The adjacent menu window appears. Apart from the control parameters
the currently set values are displayed.

– Under the menu point "Tv man/auto" you can select between

manual and automatic entry using .

The selection is indicated in the menu line by a (automatic) or m (manual).
If "automatic" is selected, the entry is blocked for the parameters Tv and
Td.

– Select and confirm parameters with or and .

The appropriate edit window appears with Min and Max figures for the
parameter values Xp, Tn, Tv and Td.

– Change the value with or .
– Single figures can be selected by pressing or .
– Confirm your choice with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

Xp
Min: 0.1 Max: 50.0

ESC  OK - - -

12.0

ESC  OK STOP

Xp 10.0

Tn 30
Tv man/auto a
Tv 24 (a)
Td 4.0 (a)

E Control parameters

12.13 Internal control variable (internal temperature sensor)

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The setting options illustrated in this section are only possible with a connected external temperature sensor or with an
existing module (as activated as control variable in Section C) for reading in the actual temperature.

The control system for external actual values is realized as a two-stage cascade controller to improve the response to
setpoint changes. From the temperature setpoint and the external temperature, which is generally measured by the ex­ternal Pt100, a "master controller" determines the "internal setpoint" which is passed to the slave controller. Its set value
controls the heating and cooling.

Correcting quantity limit

If a step change in set-point temperature is specified, the optimum control might set an outflow temperature which is
substantially higher than the temperature desired on the external vessel. With the correction limitation the maximum
permissible deviation between the temperature in the external consumer and the temperature of the outflow liquid can be
limited. The limit can be set via a menu point. 

These parameters can be set on the master controller (PIDT or external controller):

Description

Short form

Unit

Gain

Kpe

-

Proportional range

Prop_E

K

Reset time

Tne

s

Derivative time

Tve

s

Damping time

Tde

s

These parameters can be set on the slave controller (P-controller):

Description

Short form

Unit

Proportional range

Xpf

K

If "Tv manual/auto" is set to "automatic", Tve, Tde and Prop_E cannot be changed. Tve and Tde are in this case derived
from Tne with fixed factors.

– You activate the soft-key bar by pressing any key.

12.14 External control variable

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– Access to the main menu level is obtained by pressing the enter

key .

– Selection and confirmation of  Setup  Control 

Contr.parameter  extern Pt100.

The adjacent menu window appears. Apart from the control parameters
the currently set values are displayed.

– Under the menu point "Tv man/auto" you can select between

manual and automatic entry using .

The selection is indicated in the menu line by "a" (automatic) or "m" (man­ual).
If "automatic" is selected, the entry is blocked for the parameters Tv and
Td.

– Select and confirm parameters with or and .

The respective edit window appears with Min and Max figures for the
parameter values Kpe, Tne, Tve, Tde and Xpf.

– Change the value with or .
– Single figures can be selected by pressing or .
– Confirm your choice with the enter key .

– By pressing (ESC) you are returned to the menu level without any change.

– You activate the soft-key bar by pressing any key.

– Access to the menu level is obtained by pressing .
– Selection and confirmation of  Setup  Control.

The adjacent menu window appears.

– Select and confirm Corr. limit. with or and .

The adjacent menu window appears. The minimum and maximum possible
values and the current value are displayed.

– Change the value with or .
– Single figures can be selected by pressing or .
– Confirm your choice with the enter key .

– By pressing

(ESC) you are returned to the menu level without any change.

Corr. limit.
Min: 0.0 Max: 500.0

ESC  OK - - -

20.0

ESC  OK STOP

Contr. Variable

Control parameter
Setpoint offset
Corr. limit. 50.0

Kpe
Min: 0.01 Max: 30.0

ESC  OK - - -

2.0

ESC  OK STOP

Kpe 0.5

Tne 100
Xpf 4.0
Tv man/auto a
Tve 280 (a)

E.1.1 Setting the correcting quantity limit

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Heat transfer liquid

Correcting quantity limit

Til

Tih

Water

depends on heat transfer liquid and vessel

5 °C

95 °C

E.1.2 Procedure for setting the control parameters for external control

1. Activating external control ( B.1).

2. Set the slave controller:

2.1. Parameter to auto ;

Xpf in dependence of:

 Check or adjust device type ( 8.2.4).
 Select heat transfer liquid with as low-viscosity and with as high a thermal capacity as possible.

Ranking list: Water, water/glycol, oils, Fluorinert®.

 Set pump level as high as possible,
 Make sure there is adequate circulation,
 select the hose length as short as possible, e.g. 2 x 1 m,
 select the hose cross-sectional area as large as possible, e.g. ½ inch,
 set the throughput through the external consumer as large as possible.

2.2. Set Xpf:

 With a tendency to oscillate with a short period of oscillation (e.g. 30 s)  Xpf smaller, otherwise larger,
 with poor thermal coupling and a large mass to temper  large (e.g. 2 – 5, possibly even larger),
 with good thermal coupling and a small mass to temperature-stabilize  small (e.g. 0.2 – 0.7),
 if fast temperature changes are required, external baths should be controlled if possible with internal control. Other-

wise choose Xpf to be very small (0.05 – 0.1).

3. Setting the master controller (PID controller):

 First start with Auto, then possibly continue with manual.

3.1. Setting Kpe:

 With a tendency to oscillate (long period of oscillation, e.g. 10 min)  Kpe larger, otherwise smaller,

3.2. Setting Tne/ Tve/ Tde:

 Generally quite high values (Tne = 70 s – 200 s; Tve = 50 s – 150 s),
 with smaller values  faster transient responses, otherwise slower transient responses and therefore less oscillation,
 Tve: To reduce transients  increase Tve, otherwise vice versa,
 Tde (damping for Tve): generally approx. 10 % of Tve.

4. Correcting quantity limit ( E.1.1) and temperature limits (Til/Tih) ( 7.4.5):

 Set according to the physical boundary conditions.

Example:

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All existing menu points are shown. Modules and menu points which cannot be realized are however masked out.

off

on

no

yes Set-point temperature

Calibration

external actual temperature

Factory calibration

Pump power

Status

Job function

Voltage 0-10V

closed

Interface type

Current 0-20mA

open

minimal value

Current 4-20mA

Main Menue

automatic

maximal value

Calibration

off

on

Analog Input 1

Analog Input 2

Status

Set-point temperature

Analog Output 1

Job function

Controlled temperature

Analog Output 2

Interface type

Internal temperature

Interfaces

minimal value

Temperature extern Pt100

maximal value

Temperature extern analog

Calibration

Temperature extern serial

Set value

Pump power

RS 232

Pump speed

RS 485

extern Pt100

Voltage 0-10V

Cooling valve

Current 0-20mA

Analog Interface

2400

Current 4-20mA

serial interface

Mode

4800

Switch.contacts

Baud rate

9600

off

RS 485 address

19200

Fault

Standby

Programmer

Input 1

Job function

Change mode

Input 2

Contact open

Control mode

Input 3

Contact closed

Output 1

Contact open

intern Pt100

Output 2

Contact closed

extern Pt100

Output 3

extern analog

extern serial

Job function

Diagnostics

off

Temperature range

Error diagnosis

Standby

temperature range

Programmer

Control mode

All Messages

Low level

Overtemperature

Errors only

F Interface modules

12.15 Menu structure of the modules

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Analogue Module (LAUDA catalogue no. LRZ 912) has two inputs and two
outputs, which are brought out to a six-pole DIN socket to Namur Recom­mendation (NE28).

The inputs and outputs can be set independently of one another as a 0 –
20 mA, 4 – 20 mA or 0 – 10 V interface; Various functions can be selected
for the inputs and outputs. Accordingly, the signal on the input is interpreted
differently and different information appears on the output.

In addition the interfaces can be freely scaled according to the set function.
20 V DC is available for measurement transducers.

The following values can be defined via the inputs:

– Set-point temperature Setpoint temperature
– Ext. Actual temperature External actual temperature
– Pump power pump power
– The following values can be output via the outputs:
– Set-point temperature Set-point temperature
– Controlled temp. The temperature to which the system is being controlled.
– Internal temp. Actual temperature (bath temperature)
– Temp.extern Pt100 External actual temperature of Pt100
– Temp.extern analog External actual temperature of the analog input
– Temp.extern serial External actual temperature of the serial interface:
– Set value Set value
– Pump power Pump power
– Pump speed Pump speed

In addition the interfaces can be freely scaled according to the set function with minimal value and

maximal value.

For example: 4 mA corresponds to 0 °C and 20 mA corresponds to 100 °C.

Accuracy of the inputs and outputs after calibration better than 0.1 % of full scale.

 Inputs, current
 Inputs, voltage
 Outputs, current
 Outputs, voltage

– Input resistance < 100 Ohm
– Input resistance > 50 kOhm
– Burden < 400 Ohm
– Load > 10 kOhm

12.16 Analog module

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Connection of analog inputs and outputs

A six-pole round connector with screw lock and contact assignment according to DIN EN 60130-9 or IEC 130-9 are
required.
A suitable coupling plug is obtainable under the catalogue no. EQS 057.

View of socket (front) or solder side of plug:

Socket 74S

Contact 1 Output 1
Contact 2 Output 2
Contact 3 0 V reference potential
Contact 4 Input 1
Contact 5 +20 V (max. 0.1 A)
Contact 6 Input 2

Note: Only use screened connecting leads, connect the screen to the plug housing.

RS 232/485 Interface Module (catalogue no. LRZ 913) with nine-pole SUB­D socket. Electrically isolated using optocouplers. With the LAUDA instruction
set, extensively compatible to Ecoline, Proline and Integral series.

The RS 232 interface can be connected directly to the PC with a 1:1 con­nected cable (catalogue no. EKS 037, 2 m cable and EKS 057, 5 m cable).

Computer

Thermostat

Signal

9-pole Sub-D socket

25-pole Sub-D socket

9-pole Sub-D socket

Signal



    

R x D

2 2 3 3 2 2 T x D

T x D

3 3 2 2 3 3 R x D

DTR 4

20 4 DSR

Signal Ground

5 5 7 7 5

5

Signal Ground

DSR 6 6 6

DTR

RTS 7 4 7

CTS

CTS 8 5 8

RTS

 with hardware handshake: On connecting a thermostat to the PC use a 1:1 and not a null-modem cable.
 without hardware handshake: The operating mode "Without hardware handshake" must be set on the comput-

er/PC.

– Use screened connecting leads. Connect screen to the plug housing.
– The wires are electrically isolated from the rest of the electronics.
– Non-assigned pins should not be connected.

12.17 RS 232/485 interface module

F.1.1 Connecting lead and interface test RS 232