HygroMatik FlexLine Spa User manual

FlexLine Spa
Control
ÁFL-TSPA.ENäÈ
FL-TSPA.EN
E-8881168
Manual

Page 2
Risk of electrical shock!
Hazardous electrical high voltage!
All electrical work to be performed by certified expert staff (electricians or expert personnel with
eqivalent training) only.
Certain computer programs contained in this product [or device] were developed by HygroMatik
GmbH ("the Work(s)").
Copyright © HygroMatik GmbH [16.02.2018]
FlexLine SPA Control
All Rights reserved.
Current version of this manual can be found at: www.hygromatik.co.uk
HygroMatik GmbH grants the legal user of this product [or device] the right to use the Work(s)
solely within the scope of the legitimate operation of the product [or device]. No other right is
granted under this licence. In particular and without prejudice to the generality of the foregoing,
the Work(s) may not be used, sold, licensed, transferred, copied or reproduced in whole or in
part or in any manner or form other than as expressly granted here without the prior written con-
sent of HygroMatik GmbH.
Information in this manual is subject to change or alteration without prior notice.
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1. Introduction ....................................................................................................................... 5
1.1 Typographic Distinctions ...................................................................................................5
1.2 Documentation .................................................................................................................. 5
1.3 Symbols in Use ................................................................................................................. 5
1.3.1 Specific Symbols related to Safety Instructions ............................................................. 5
1.3.2 General Symbols ............................................................................................................ 5
2. Safety Instructions ............................................................................................................ 7
2.1 Guidelines for Safe Operation ........................................................................................... 7
2.1.1 Scope ............................................................................................................................. 7
2.1.2 Unit control ..................................................................................................................... 7
2.1.3 Unit Operation ................................................................................................................ 7
2.1.4 Mounting, dismantling, maintenance and repair of the unit ............................................ 8
2.1.5 Electrical ......................................................................................................................... 8
2.2 Disposal after dismantling ................................................................................................8
3. Overview of the operation and layout of a steam bath .................................................. 9
3.1 Layout of steam bath (schematic diagram) ....................................................................... 10
3.2 Temperature sensor usage ............................................................................................... 11
3.2.1 Installation of the temperature sensor ............................................................................ 11
3.2.2 Connection of the temperature sensor ........................................................................... 11
3.3 Steam bath temperature control ........................................................................................ 11
3.4 Fan control ........................................................................................................................ 12
3.4.1 Supply fan ...................................................................................................................... 12
3.4.2 Exhaust fan .................................................................................................................... 12
3.5 Sample diagram for temperature profile in steam bath ..................................................... 13
4. Description of control ....................................................................................................... 14
4.1 General description ........................................................................................................... 14
4.2 Layout of control ................................................................................................................ 14
4.3 Mainboard ......................................................................................................................... 15
4.3.1 Connections on the mainboard ...................................................................................... 16
4.4 Extension board (only for double cylinder units) ............................................................... 17
4.4.1 Connections on the extension board .............................................................................. 17
4.5 Relay board (optional) ....................................................................................................... 18
4.5.1 Connections on the relay board ..................................................................................... 18
4.6 Electrical connection ......................................................................................................... 19
4.6.1 Connection of control voltage ......................................................................................... 19
4.6.2 Connection of interlock (safety) system ......................................................................... 19
4.6.3 Connection of the temperature sensor(s) ....................................................................... 20
4.6.4 Connecting the digital input (DI) ..................................................................................... 20
4.6.5 Connection of the control signal and the release signal in case of multiple units .......... 20
5. The display ......................................................................................................................... 21
6. Operation of control .......................................................................................................... 23
6.1 Operation basics ............................................................................................................... 23
6.2 Screen 1 - Commissioning ................................................................................................ 25

Page 4
6.2.1 Setting the language ...................................................................................................... 25
6.2.2 Input of date and time of day .......................................................................................... 25
6.2.3 Control settings .............................................................................................................. 26
6.3 Screen 2 - Main screen .....................................................................................................28
6.3.1 Changing the set point temperature ............................................................................... 28
6.4 Password entry .................................................................................................................. 30
6.5 Screen 3 - Main menu (user level) .................................................................................... 30
6.6 User level submenus ......................................................................................................... 30
6.6.1 Settings submenu ........................................................................................................... 33
6.6.2 Reading values submenu ............................................................................................... 34
6.6.3 History submenu ............................................................................................................ 37
6.7 Screen 3 - Main menu (operator level) .............................................................................. 39
6.8 Operator level submenus .................................................................................................. 39
6.8.1 Settings submenu ........................................................................................................... 40
6.8.2 Reading values submenu .............................................................................................. 41
6.8.3 Control submenu ............................................................................................................ 41
6.8.4 Service submenu ............................................................................................................ 42
6.8.5 History submenu ............................................................................................................ 44
6.8.6 Blow-down submenu ...................................................................................................... 45
6.8.7 Fill parameters submenu ................................................................................................ 45
6.8.8 Functions submenu ........................................................................................................46
6.8.9 Communication interface submenu ................................................................................ 48
6.8.11 SPA submenu .............................................................................................................. 50
6.8.12 Essence submenu ........................................................................................................ 52
6.8.13 Recording submenu ..................................................................................................... 53
6.8.14 Relay extension 1 submenu ......................................................................................... 55
6.8.15 Relay extension 2 submenu ......................................................................................... 56
7. Faults and service messages ........................................................................................... 60
7.1 Fault handling .................................................................................................................... 60
7.1.1 Table of fault messages, possible causes and countermea-sures ................................. 60
7.2 Servicemessages and warnings ....................................................................................... 67
7.3 Functional fault chart ......................................................................................................... 68
8. Wiring diagram .................................................................................................................. 72
9. Glossary ............................................................................................................................. 84
10. Technical data ................................................................................................................. 90

Page 5
1. Introduction
Dear Customer,
Thank you for choosing a HygroMatik steam
generator.
HygroMatik steam generators represent the
latest in humidification technology.
In order to operate your HygroMatik steam
generator safely, properly and efficiently,
please read these operating instructions.
Employ your steam generator only in sound
condition and as directed. Consider potential
hazards and safety issues and follow all the
recommendations in these instructions.
If you have additional questions, please con-
tact your expert dealer.
For all technical questions or spare parts
orders, please be prepared to provide unit
type and serial number (see name plate on
the unit).
1.1 Typographic Distinctions
•Preceded by a bullet: general speci-
fications
» Preceded by an arrow: procedures
for servicing or maintenance which
should or must be performed in the
indicated order
Installation step which must be
checked off.
italics Terms used with graphics or
drawings
1.2 Documentation
Validity:
This documentation is valid for the control
built in the FlexLine unit series with the follo-
wing designations:
FLExx-TSPA
Flexline unit type: Electrode Steam Humidi-
fier (ELDB)
FLHxx-TSPA
Flexline unit type: Heater Steam Humidifier
(HKDB)
Retention
Please retain these operating instructions in
a secure, always accessible location. If the
product is resold, turn the documentation
over to the new operator. If the documenta-
tion is lost, please contact HygroMatik.
Versions in Other Languages
These operating instructions are available in
several languages. If interested, please con-
tact HygroMatik or your HygroMatik dealer.
1.3 Symbols in Use
1.3.1 Specific Symbols related to
Safety Instructions
According to ANSI Z535.6 the following
signal words are used within this document:
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
WARNING indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
CAUTION indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
NOTICE is used to address practices not
related to physical injury.
1.3.2 General Symbols
This symbol is used whenever a situation
requires special attention beyond the scope
of safety instructions.
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Intended Use
The control described is an integral part of a
HygroMatik steam generator. Use for other
applications is not permitted. All instructions
on intended use, which are given in connec-
tion with the basic device, apply.
Proper usage also comprises the adherence
to the conditions specified by HygroMatik for:
• installation
• dismantling
• reassembly
• commissioning
• operation
• maintenance
• disposal
Only qualified and authorised personnel may
operate the unit. Persons transporting or
working on the unit must have read and
understood the corresponding parts of the
Operation and Maintenance Instructions and
especially the chapter 2. „Safety Notes“.
Additionally, operating personnel must be
informed of any possible dangers. You
should place a copy of the Operation and
Maintenance Instructions at the unit‘s opera-
tional location (or near the unit).
By construction, HygroMatik steam gene-
rators are not qualified for exterior appli-
cation.
Risk of scalding!
Steam with a temperature of up to 100 °C
is produced.
Do not inhalate steam directly!
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2. Safety Instructions
These safety instructions are required by law.
They promote workplace safety and accident
prevention.
2.1 Guidelines for Safe Opera-
tion
2.1.1 Scope
Comply with the accident prevention regula-
tion „DGUV Regulation 3“ to prevent injury to
yourself and others. Beyond that, national
regulations apply without restrictions.
2.1.2 Unit control
Do not perform any work which compromises
the safety of the unit. Obey all safety instruc-
tions and warnings present on the unit.
In case of a malfunction or electrical power
disruption, switch off the unit immediately and
prevent a restart. Repair malfunctions
promptly.
Restricted use.
IEC 60335-1 stipulates as follows:
This device may be used by children of eight
years of age and above as well as by persons
with reduced physical, sensory or mental ca-
pabilities or lack of experience and knowledge
so long as they are supervised or have been
instructed regarding the safe use of the de-
vice and understand the hazards that may re-
sult from it. Cleaning and user maintenance of
the unit must not be undertaken by children
without supervision.
2.1.3 Unit Operation
Risk of scalding!
Uncontrolled hot steam escape in case of
leaking or defective components possible.
Switch off unit immediately.
Risk of material damage!
The unit may be damaged if switched on
repeatedly following a malfunction without
prior repair.
Rectify defects immediately!
The unit must not be operated on a DC
power supply.
The unit may only be used connected to a
steam pipe that safely transports the steam.
Regularly check that all safety and monito-
ring devices are functioning normally. Do not
remove or disable safety devices.
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Page 8
2.1.4 Mounting, dismantling, mainte-
nance and repair of the unit
The HygroMatik steam humidifier is IP20 pro-
tected. Make sure that the unit is not object to
dripping water in the mounting location.
Installing a humidifier in a room without water
discharge requires safety devices to protect
against water leakages.
• Use genuine spare parts only
• After any repair work, have qualified
personnel check the safe operation of
the unit
• Attaching or installing of additional
components is permitted only with the
written consent of the manufacturer
2.1.5 Electrical
Risk of electrical shock!
Hazardous electrical voltage!
Any work on the electrical system to be per-
formed by certified expert staff (electricians
or expert personnel with comparable training)
only.
Disconnect unit components from electrical
power supply prior to work.
After electrical installation or repair work, test
all safety mechanisms (such as grounding
resistance).
Use only original fuses with the appropriate
amperage rating.
Regularly check the unit‘s electrical equip-
ment. Promptly repair any damage such as
loose connections or burned wiring.
Responsibility for intrinsically safe installation
of the HygroMatik steam humidifiers is
incumbent on the installing specialist com-
pany.
2.2 Disposal after dismantling
The operator is responsible for the disposal
of unit components as required by law.
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Page 9
3. Overview of the operation
and layout of a steam bath
The HygroMatik steam generator provides
the steam bath with the steam required for
operation. The temperature measured in the
steam bath is the only control variable used
to control the steam production. When stan-
dard settings are used, the steam bath
reaches approx. 45 °C at 100% humidity.
One or, if required, two supply fans introduce
fresh air to the steam bath, one or two
exhaust fans extract warm air from the steam
bath to ensure a continuous supply of steam
and stable temperature control. The steam
generator can control up to 4 essence injec-
tors.
Heating-up phase:
Steam is supplied to the steam bath, which is
still cold. As a result, the relative humidity
increases first to 100%, while the tempera-
ture remains almost constant. A further sup-
ply of steam then increases the temperature;
the relative humidity remains at 100%.
Operational phase:
When the set point temperature value +
switch-off temperature difference has been
reached, steam production is interrupted. If
the steam bath temperature sinks below the
adjustable set point temperature, steam is
again introduced into the cabin.
Controls for lights, fans and essences are
optional accessories. The HygroMatik steam
bath functions are optionally available in 24 V
or 230 V versions.
There is a danger of electric shock due in
case of non-observance!
Only safety extra-low voltage (24 V) may be
used in the steam cabin for fans and lights.
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3.1 Layout of steam bath
(schematic diagram)
Position Designation
1 Steam generator
2 Essence peristaltic pump
3 Essence container
4 Essence line to steam hose
5 T-piece for essence injection into steam hose
6 Steam hose
7 Steam manifold in steam bath
8 Supply fan
9 Temperature sensor
10 Exhaust fan
11 Cabin light
The following figure shows a simplified diagram of a steam bath - it is not an installation
instruction!
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7
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Page 11
3.2 Temperature sensor usage
A temperature sensor must be installed in the
cabin for a steam bath. The sensor measures
the actual temperature and transmits the
measurement value to the control. The tem-
perature serves as the controlled variable for
controlling the steam production.
3.2.1 Installation of the temperature
sensor
The best mounting position of the tempera-
ture sensor is 800 to 1000 mm (31 to 39 inch)
above the seating surface (and thus in the
height of head of the persons in the steam
bath cabin). The sensor must be mounted
directly to the wall surface. Installation under
a panelling would falsify the measurement
result.
The sensor must not be mounted directly
above the steam entrance into the cabin.
Risk of scalding when steam bath tempe-
rature rises due to temperature sensor
manipulation!
Do not cover the temperature sensor or pour
over cold water.
3.2.2 Connection of the temperature
sensor
The connection cable of the temperature
sensor is to be wired to terminals 4 and 7 of
the FlexLine SPA control. The sensor has
been adjusted ex-factory. Verifying of the
measurement value can be made by using
the temperature/resistance table following
below. Readjustment of the sensor can be
made in a +/- 5 K range, if required. In this
case, an additional temperature measure-
ment device is required for referencing.
3.3 Steam bath temperature con-
trol
The steam output of the HygroMatik steam
generator is controlled by the FlexLine SPA
control according to the measured tempera-
ture. The relative humidity is not measured
because it is always 100% after the heating-
up phase. Essence injectors, lights and sup-
ply and exhaust fans, which are available as
order options, can be connected to the steam
generator.
The functioning of the temperature control is
illustrated by the sample diagram in section
3.5, which is based on the following default
values:
Steam bath temperature set value: 45 °C
∆Temp._steam_on/off: 1K
(Temp._set value + Temp._steam_on/off) =
45 °C + 1K = 46 °C
• When 46 °C has been reached, steam
production is switched off in 1 step
operation, during continuous operation
(with the internal PI controller), it is
reduced
• If the temperature in the steam bath
drops below the set value 45 °C, steam
production is resumed (1 step opera-
tion) or ramped up (continuous opera-
tion)
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Temperature/resistance-table
Temperature in °C Resistance in kΩ
10 28,5
20 18,5
30 12,3
40 8,3
50 5,8
60 4,1
70 2,9
80 2,1

Page 12
3.4 Fan control
The influences of the fan control of the supply
and exhaust fans (both in automatic mode)
are also illustrated in the sample diagram.
3.4.1 Supply fan
The supply fan is switched on by the control,
as long as the steam bath temperature has
not reached the set value. It switches off at
(Temp._set value + supply fan 1_∆Temp.) In
the example:
Temperature set value: 45 °C
Supply fan 1_∆Temp .: 1K
• The supply fan 1 switches off at
45 °C + 1K = 46 °C
• Supply fan 1 switches back on again if
the temperature falls below the temper-
ature set value
If a second supply fan is used or if the supply
fan has a 2nd power level, both supply fans
are switched on until the temperature set
value is reached. Analogous to supply fan 1,
supply fan 2 is switched off when (Temp._set
value + supply fan 2_∆Temp.) is reached.
This mechanism is not illustrated in the sam-
ple diagram. Numerically, it could be repre-
sented as follows:
Temperature set value: 45 °C
Supply fan 1_∆Temp .: 2K
Supply fan 2_∆Temp .: 0.5 K
• Supply fan 1 switches off at 45 °C + 2 K
= 47 °C
• Supply fan 2 switches off at 45°C + 0.5
K = 45.5 °C
3.4.2 Exhaust fan
The exhaust fan is switched on if the temper-
ature set value is exceeded. The exhaust fan
switches off when the temperature falls below
(Temp._set value - exhaust fan 1_∆Tem p. ).
In the example:
Temperature set value: 45 °C
Exhaust fan 1_∆Tem p .: 1K
• The exhaust fan switches off at
45 °C - 1K = 44 °C
If a second exhaust fan is used or if the
exhaust fan has a 2nd power level, this addi-
tionally switches on if (set temperature value
+ exhaust fan 2_∆Temp.) has been reached.
This mechanism is not illustrated in the sam-
ple diagram. Numerically, it could be repre-
sented as follows:
Temperature set value: 45 °C
Exhaust fan 1_∆Tem p .: 1K
Exhaust fan 2_∆Tem p .: 0.5 K
• Exhaust fan 1 switches on at 45 °C
• Exhaust fan 2 additionally switches on
at 45.5 °C
• Both exhaust fans switch off at 44 °C
Steam is only produced as long as the tem-
perature in the steam bath is below the set
temperature. If the temperature in the steam
bath remains above the set temperature for a
long time, i.e. no visible steam is produced,
the reason for this can be:
• A high additional heat supply, e.g. due
to heated benches
• Excessive insulation of steam bath
• Insufficient ventilation in the steam bath
An exhaust fan promotes the air exchange in
the steam bath, leading to a faster tempera-
ture reduction in the steam bath. The temper-
ature drop is compensated by renewed
steam production. In this way, the fan
ensures that there is a steady, constant pro-
duction of steam and visible vapour in the
cabin a result.

Page 13
3.5 Sample diagram for tempera-
ture profile in steam bath
Temperature profile in steam bath
Temperature
46.0 °C
45.0 °C
44.0 °C
Steam production
Exhaust fan
Supply fan
Essence
Time
A = essence injection time
B = essence pause time

Page 14
4. Description of control
4.1 General description
The control is integrated into the steam
humidifier and is operated via a 3.5" graphic
display on the front of the unit.
An additional operating element on the front
of the unit is a control switch, whose posi-
tions are assigned as follows:
Pos. "0": The unit is switched off
Pos. "I": The unit is switched on
Pos. "II": The cylinder water is pumped off
without the participation of the control. The
control is not active, the display remains
dark.
By changing the parameters, the user/opera-
tor can adapt the control to the system speci-
fications and the special characteristics
relating to the use of the unit.
The operation of the unit is described in Sec-
tion 6.
4.2 Layout of control
The control consists of the 3.5" screen and
the mainboard. The mainboard can be
extended for additional functions with one or
2 relay boards (with 3 relays each) and addi-
tional optional relays in DIN rail format.
The relay boards are connected to the main-
board via a plug system.
The DIN rail relays are connected via cables
with plug. 2 additional relay modules can be
used, with 2 relays each.
For use with double cylinder units, an exten-
sion board is added to the mainboard.
The fuse protection of the control voltage for
all boards with 2 x 2.5 A Flink (F1, F2) takes
place on the mainboard.
The external circuitry for the control voltage
and the interlock (safety) system are con-
nected directly to the mainboard on plug ST1.
If additional boards are connected, the con-
nection moves from the mainboard to the out-
ermost board (see sketch).
Control switch
ST1
N
L12
Relay
board
Main
board
ST1.1
ST1.2
ST1
Connections:
L, N: 230 VAC control voltage
1,2: Interlock (safety) system
ST1.1

Page 15
4.3 Mainboard
The mainboard is "the heart" of the control.
All logic functions and control operations for
the steam humidifier take place here.
The relays for the control of the main contac-
tor, inlet solenoid valve and blow-down pump
are arranged directly on the mainboard.
F1
F2 ST06 ST05 ST04-A ST04-B ST07
ST08ST03
ST1 ST11.1
ST09
ST10.1
ST10.2
ST13
ST12.1
USB
ST15
Main relay
Plugs for
relay 1-4
connection
(order opton)

Page 16
4.3.1 Connections on the mainboard
The use of the connections is illustrated by
the wiring diagrams (see Chapter 8)
4.3.1.1 Customer-side computer
interfaces
Inputs
ST08:
• Input for control signal of temperature
sensor
• Configurable digital input 12 VDC
Outputs
ST03:
• Potential free break/make contacts NC
and NO, programmable, relay assigned
to "Collective fault" in factory setting
ST10.1/ST10.2:
• Connection options for an optional
relay each in DIN rail version with wir-
ing harness (order option)
ST07:
Control output 0...10 VDC (max. 8 mA)
ST08:
• +20 VDC supply voltage (max. 20 mA)
for humidity sensors (can be used as
auxiliary voltage for digital input)
ST15:
• Tap for 1,2 and N (max. 2.5 A) for cus-
tomer use
USB:
Connection for USB stick for use as a data
logger and for parameter or software updates
4.3.1.2 System-side interfaces
ST1:
• 4-pin screw / plug connection for the
connection of L1 and N and the inter-
lock (safety) system
ST11.1:
• +12 V, GND, CAN-Bus
Inputs
ST09:
• Input for current transformer for ELDB
(= Electrode steam humidifier) / level
control for HKDB (heater steam humidi-
fier) with automatic detection (for expla-
nation of terms see Glossary, Index 7)
ST04-B:
• Galvanically isolated input (optical cou-
pler) for sensor electrode for ELDB
Outputs
ST04-A:
• Main contactor
ST05:
• Blow-down pump
ST06:
• Inlet solenoid valve
Bi-directional
ST12.1:
• Serial interface for screen connection
ST 13:
• Base for adapter board with RS485
interface

Page 17
4.4 Extension board (only for
double cylinder units)
4.4.1 Connections on the extension
board
4.4.1.1 Customer-side computer
interfaces
Inputs/outputs
ST05:
Not used
4.4.1.2 System-side interfaces
ST1.1:
• 4-pin screw / plug connection for the
connection of L1 and N and the inter-
lock (safety) system
ST1.2:
• Loop-through of ST1.1
ST07:
• +12 V, GND, CAN-Bus
ST08:
Loop-through of ST07
Inputs
ST06:
• Input for current transformer (ELDB) /
level control (HKDB) with automatic
detection
Outputs
ST02-A:
• Main contactor
ST03:
• Blow-down pump
ST04:
Inlet solenoid valve
ST1.1
ST07 ST08
ST1.2
ST06
ST04 ST03 ST02-B ST02-B
ST05
DIP switches *)
*) The DIP switches are for CAN-Bus address setting. They are factory preset according to the unit configuration.

Page 18
4.5 Relay board (optional)
The relay board has three additional relays
with potential free break/make contacts
(contact load 250 VAC/8 A) for switching or
controlling of additional functional units or
options. A maximum of 2 relay boards can be
installed.
4.5.1 Connections on the relay board
4.5.1.1 Customer-side computer
interfaces
Inputs
ST05:
• Configurable digital input 12 VDC
Outputs
ST02:
• Potential free break/make contacts NC
and NO, programmable
ST03:
• Potential free break/make contacts NC
and NO, programmable
ST04:
• Potential free break/make contacts NC
and NO, programmable
4.5.1.2 System-side interfaces
ST11:
• 4-pin screw / plug connection for the
connection of L1 and N and the inter-
lock (safety) system
ST1.2:
• Loop-through of ST11
ST08:
• +12 V, GND, CAN-Bus
ST07:
• Loop-through of ST08
ST04 ST03 ST02
ST11 ST7
ST1.2
ST08
ST05
DIP switches *)
*)The DIP switches are for CAN-Bus address setting. They are factory preset according to the unit configuration

Page 19
4.6 Electrical connection
Danger of electric shock!
Dangerous electric voltage!
All work relating to the electrical installation
may only be carried out by designated spe-
cialist personnel (electrician or qualified per-
son with equivalent training).
The customer / operator is responsible for
monitoring the qualifications of the specialist
personnel.
Potential component damage due to elec-
trostatic discharge!
To protect the sensitive electronic compo-
nents, measures to prevent damage due to
electrostatic discharge must be taken before
the start of the installation work.
4.6.1 Connection of control voltage
The control voltage of 230 VAC is to be
applied to the board which is closet to the
cable gland on the underside of the housing.
The plug designation differs depending on
the level of expansion:
The pin assignment is identical for all plugs. L
and N are labelled on the plugs.
4.6.2 Connection of interlock (safety)
system
Danger of electric shock!
Dangerous electric voltage!
After the initial operation of the unit, a
230 VAC voltage is present at terminal 1
when standard wiring is used.
The so-called interlock (safety) system is
located between terminals 1 and 2. Safety
equipment can be wired into the interlock
(safety) system. If the interlock (safety) sys-
tem is open, the humidifier is not operational
or the operation is interrupted.
The interlock (safety) system is not closed
when delivered ex-factory!
The contacts, which are connected to termi-
nals 1 and 2 must be potential free and suit-
able for switching of 230 VAC.
Type of board Plug designation
Mainboard ST1
Extension board ST1.1
Relay board ST11
:$51,1*

3OHDVHQRWH
127,&(127,&(
:$51,1*

Terminals 1/2 on the mainboard (socket ST1)
for connection of the interlock (safety)
Safety equipment
system
21LN socket ST1
3OHDVHQRWH
3OHDVHQRWH

Page 20
4.6.3 Connection of the temperature
sensor(s)
If a 2nd temperature sensor is used, this is to
be connected to the extension board or to
relay board 1 (if several relay boards are
present):
4.6.4 Connecting the digital input (DI)
The digital input on the mainboard can be
used for switching functions.
The digital input must be wired on-site in
accordance with its use, e.g. with as push-
button or a switch (also see chapter 6.8.8
„Function parameters“ / „Function_digital_
input“).
Wiring the digital input (DI):
4.6.5 Connection of the control sig-
nal and the release signal in
case of multiple units
In case of multiple units, separate steam gen-
erators work together. The control signal and
the release signal are connected to the mas-
ter unit, as described above. In addition, con-
necting cables are established between the
master unit and the slave unit(s) (provided
on-site). This is used by the master unit to
provide the slave unit with an actuator signal
and the transmitted (potential free) release
signal.
The electrical connection for the control sig-
nal and release signal must be implemented
as follows for multiple units:
1) „ST07“ designates the connector plug on the main-
board
2) „K20“ is the relay used for the connection of the suc-
cessing unit with the installed option (CN-07-10012) or
the enclosed option (CN-07-10002)
34567
Temperature sensor 1 Terminal strip
ST08
Connection of temperature sensor 1
to the mainboard
8
34567
Temperature sensor 2 Terminal strip
ST05
Connection of temperature sensor 2
to extension board or
relay board 1 (if an
extension board is not present)
8
3456
7
8
Terminals 3/8 provided for connecting the digital
input
- mainboard (terminal strip ST08)
- extension board/relay board (terminal strip ST05
DI
3456
7
8
Terminal strip ST08/ST05
DI
push-
button
switch
20VDC 20VDC
12 13 11 14
5412
ST07 K20
ST08 ST01
Guiding unit
Successing unit
2)
1)