EOS KUSATEK K-Tec User manual

EN
Made in Germany
Druck-Nr.: 2902 5045
Stand: 35/23
K-Tec
Control for gas-powered sauna heaters
Installation Instructions for retailers

EN-2 Installation Instructions for retailers - K-Tec
EN Documentation
Documentation
Manufacturer
Original installation and operating instructions EN
Copyright for these operating instructions remains with EOS Saunatechnik
GmbH.
Copyright as per DIN ISO 16016:
The copying and distribution of this document, as well as the use and com-
munication of its contents without express authorisation, are not permit-
ted. Compensation will be claimed in the event of infringements.
All rights reserved with regard to patent claims or submission of design or
utility patent.
Characters, symbols and illustrations
EOS Saunatechnik GmbH
Schneiderstriesch 1
35759 Driedorf, Germany
Tel. [phone]
Fax [phone]
Email [email protected]
Web www.eos-sauna.com
Additional information about an operating step
Cross-reference to a page
Read instructions
Result of a step
Table title
Title of figure
≤ ≥ Less than or equal to, greater than or equal to

K-Tec - Installation Instructions for retailers EN-3
Documentation
Revision history
Date Version Description
30 Aug. 2023 01.30 Technical data amended; switch to DIN A5, UKCA added
10 Dec. 2021 01.20 Installation chapter: legends amended
15 June 2021 01.10 Scope of delivery amended.
1 Apr. 2021 01.00 First version

K-Tec - Installation Instructions for retailers EN-4
Contents
Documentation ..................................................................................................EN-2
1 General safety instructions ..........................................................................EN-6
1.1 Installation and maintenance..............................................................EN-6
1.2 Operator instruction................................................................................EN-7
1.3 Safety levels............................................................................................. EN-11
1.4 Standards and regulations................................................................. EN-11
2 Identification.................................................................................................... EN-12
2.1 Scope of delivery ................................................................................... EN-12
2.2 Nameplate ............................................................................................... EN-14
2.3 Technical data......................................................................................... EN-14
2.4 Functions and applications ...............................................................EN-16
2.5 Relay box .................................................................................................. EN-19
2.6 Control panel ......................................................................................... EN-21
2.7 Intended use ........................................................................................... EN-22
3 Installation ........................................................................................................ EN-23
3.1 Power supply and data lines ............................................................ EN-24
3.2 Installation work inside the cabin ................................................... EN-25
3.2.1 Installing the cabin fan........................................................ EN-26
3.2.2 Installing the temperature sensor and safety temperature
limiter ........................................................................................ EN-26
3.2.3 Installing cabin lighting ...................................................... EN-27
3.3 Relay box ................................................................................................. EN-28
3.3.1 Requirements ......................................................................... EN-29
3.3.2 Installing the relay box........................................................ EN-32
3.4 Control panel .......................................................................................... EN-37
3.4.1 Requirements ......................................................................... EN-37
3.4.2 Mounting the housing ........................................................EN-40
3.4.3 Mounting the control panel..............................................EN-46

EN-5 Installation Instructions for retailers - K-Tec
EN
4 Electrical installation ....................................................................................EN-48
4.1 Installation examples............................................................................EN-48
4.2 Circuit board assignment....................................................................EN-51
4.3 Dip switch.................................................................................................EN-52
4.3.1 ADDRESS dip switch ............................................................EN-52
4.3.2 CONFIG dip switch ................................................................EN-52
4.4 Connection diagram.............................................................................EN-54
4.5 IO-EXT-HV module.................................................................................EN-57
4.5.1 Input and output assignments .........................................EN-58
4.5.2 Connecting a module ..........................................................EN-58
4.6 Connecting the mains supply and consumer .............................EN-60
4.6.1 Connecting lighting and mains supply .........................EN-61
4.6.2 Connecting the burners ......................................................EN-61
4.6.3 Connecting the air supply fan...........................................EN-62
4.6.4 Connecting the exhaust gas fan and cabin fan ..........EN-62
4.6.5 Connecting the vaporiser...................................................EN-62
4.7 Connecting data lines ..........................................................................EN-64
4.8 Connecting the emergency button ................................................EN-65
4.9 Defining the heating period limitation..........................................EN-67
4.10 Closing the relay box............................................................................EN-68
5 Commissioning ...............................................................................................EN-69
5.1 Operation basics ...................................................................................EN-69
5.2 Setup during commissioning or after a reset ..............................EN-71
5.3 Setting up the vaporiser......................................................................EN-73
5.4 Adjusting the switching hysteresis .................................................EN-73
5.5 HOME function .......................................................................................EN-75
5.6 Troubleshooting ....................................................................................EN-79
6 General terms and conditions of service ............................................EN-80
7 Disposal...............................................................................................................EN-83

EN-6 Installation Instructions for retailers - K-Tec
EN General safety instructions
1 General safety instructions
1.1 Installation and maintenance
These operating instructions are intended for qualified per-
sonnel familiar with the laws and regulations applicable to
electrical installations, gas installations, and infrared radia-
tors at the installation site. Please observe also the installa-
tion and operating instructions for the gas-powered sauna
heater.
Observe the following general safety instructions during mounting, config-
uration and commissioning of the product.
Risk to life and limb and risk of fire
Risk to life and limb from electric shock and fire in the event of im-
proper or faulty electrical connection. This risk remains also after
completion of the installation work.
The electrical installation of the gas-powered sauna heater and
other electrical systems or equipment with a fixed mains con-
nection may be performed only by a trained electrician from an
authorised electrical company.
Ensure compliance with the applicable standards and regula-
tions for electrical installation and gas installation.
The system must be completely disconnected from the mains
supply before commencing installation and repair work.
The housing cover must only be removed by a trained special-
ist.
Fire hazard from overheating
Insufficient ventilation can lead to device overheating and fire.
Install air inlets and outlets in the cabin.
Install only gas-powered heaters that are designed and in-
stalled in such a way that they do not pose a fire hazard when
the unit is operated as intended.
Observe the gas-powered heater manufacturer's safety and in-
stallation instructions.

K-Tec - Installation Instructions for retailers EN-7
General safety instructions
Damage due to incorrect mounting location
The control unit is not suitable for outdoor use.
It must be operated only inside buildings and may not be ex-
posed to environmental conditions such as extreme humidity
and moisture or the possible formation of condensation or cor-
rosive substances in the ambient air, as well as other weather
conditions.
Similarly, excessive cold and extreme exposure to sunlight must
be prevented.
Protect the unit accordingly if there is an increased risk of me-
chanical damage.
1.2 Operator instruction
The operator of the sauna cabin must be instructed in the general safety
instructions during commissioning. The operator must be given a copy of
the operating instructions.
The operator must make the end user aware of safety instructions that are
relevant to the end user. The operator must be familiar with the settings for
the heating period and understand how it is controlled.
Risk of electric shock
A risk to life and limb from electric shock and fire arises in the event
of improper repair work. This risk remains also after work is com-
pleted.
The housing cover must only be removed by a trained special-
ist.
Repairs and installations must only be performed by a trained
specialist.
The system must be completely disconnected from the mains
supply before commencing repair work.
Use only original spare parts from the manufacturer.

EN-8 Installation Instructions for retailers - K-Tec
EN General safety instructions
Fire hazard
Objects placed on the gas-powered sauna heaters can
easily be ignited and cause fires.
Do not place objects on the gas-powered sauna
heater.
Fill rock stores with stones as directed.
Inspect the sauna cabin prior to each commissioning.
If you switch on the gas-powered sauna heater using pre-set
timers or a remote control, attach a protective cover to the
heater or install a suitable safety system.
Risk of burns from hot unit
During operation, the sauna heater may become hot and, if
touched, could cause burns.
Maintain a safe distance.
Health risks
Spending time in a sauna cabin can lead to serious health risks or
even death for persons with health impairments.
Persons with health impairments who spend time in a sauna
must consult a doctor before entering a sauna.
Equipment damage due to overuse
Excessive humidity in commercial sauna cabins can lead to prop-
erty damage.
If the sauna cabin is used commercially, the heating period
must be set so that it switches off automatically after a specific
period of time.
If the heating does not switch off automatically after a defined
heating period, cabin use must be supervised at all times.
Inspect the cabin before each use.

K-Tec - Installation Instructions for retailers EN-9
General safety instructions
Operating the unit
The gas-powered sauna heater may be operated by persons who
have been instructed in the safe use of the unit and understand
the risks it poses. Children must not play with the gas-powered
sauna heater.
Children must be supervised to ensure they do not play with
the gas-powered sauna heater.
Ensure that children and unauthorised persons do not have ac-
cess to the plant room.
Service and maintenance
There is a risk to health and risk of fire if service and maintenance
work is not performed in a professional manner.
Service and maintenance work must be performed only by:
KUSATEK customer service
Technicians who have been trained by KUSATEK
Other trained technicians if technicians trained by KUSATEK do
not service the area in which the installation site of the gas-
powered sauna heater is located.

EN-10 Installation Instructions for retailers - K-Tec
EN General safety instructions
Damage to health
Excessive time spent in a heated sauna cabin can lead to overheat-
ing of the body (hyperthermia), which may cause serious health
problems and even death. Hyperthermia occurs when the core
temperature of the body exceeds the norm by a few degrees.
Symptoms of hyperthermia include fever, dizziness, lethargy,
sleepiness, and fainting. Side effects of hyperthermia include per-
ception disorders, inability to recognize the need to leave the
room, inability to identify imminent danger, harm to the foetus in
the case of pregnant women, inability to physically leave the
room, unconsciousness.
Alcohol, drugs, and medications increase the risk of hyperthermia.
Do not exceed the maximum recommended time in the sauna.
Leave the sauna cabin if your body responds abnormally to the
heat or if you do not feel well.
Avoid alcohol, drugs, and medications when you are using the
sauna.
Operation by children or persons with reduced mental
capacity
Children and persons with reduced mental capacity can put them-
selves at risk.
Children must be supervised to ensure they do not play with
the unit.
Children under 8 years of age should not operate the sauna
cabin.
The settings for the heating period must only be changed by
children under 8 years of age if they are supervised by an adult.
The sauna cabin must only be used by persons with reduced
mental capacity, or limited physical or sensory abilities under
supervision or if they have been previously instructed in its use
and understand the risks.
Children and persons who have not received proper instruction
must not clean or service the system.

K-Tec - Installation Instructions for retailers EN-11
General safety instructions
1.3 Safety levels
Safety instructions and important operating instructions are clas-
sified according to ANSI Z535.6. Please familiarise yourself with the
following terms and symbols:
WARNING
Warning
Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION
Caution
Indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE
Notice
Indicates a hazardous situation which, if not avoided, will result in
damage to the unit.
1.4 Standards and regulations
For an overview of the standards that were observed during design and
construction of the sauna heater, please refer to the individual product’s
technical data sheet that can be downloaded from www.eos-sauna.com.

EN-12 Installation Instructions for retailers - K-Tec
EN Identification
2 Identification
Kusatek K-Tec is an electronic sauna control unit for operating gas-powered
sauna heaters in sauna cabins. The unit consists of a relay box, a control
panel, a temperature sensor and connecting cables. Additional modules/
devices can be connected to the relay box for total control of a sauna
cabin, for example, lighting, fan and additional sensors.
2.1 Scope of delivery
The following components are included in the scope of delivery:
A Relay box with 2-piece front cover
B 5 bushings
C 3 wood screws 5 x 25 mm
D 5 m connecting cable with RJ14/
RJ10 modular plug for control panel
E Removal tool for front panel
F Control panel with housing for
mounting in the wall or mounting
on the wall
G Temperature sensor with safety tem-
perature limiter,
including 5 m connecting cable with
RJ10 plug, housing, circuit board,
2 screws 4x40 mm
H Installation and operating instruc-
tions
A
B
C D
FE
GH

K-Tec - Installation Instructions for retailers EN-13
Identification
Accessories (optional)
Accessories Item no.
10 m connecting cable for sauna bus (RJ12/RJ12) 94.5861
25 m connecting cable for sauna bus (RJ12/RJ12) 94.4647
50 m connecting cable for sauna bus (RJ12/RJ12) 94.4648
20 m connecting cable for temperature sensor 94.6281
50 m connecting cable for temperature sensor 94.6282
10 m connecting cable for control panel (RJ10/RJ14) 94.6802
25 m connecting cable for control panel (RJ10/RJ14) 94.6285
50 m connecting cable for control panel (RJ10/RJ14) 94.6968
100 m connecting cable for control panel (RJ10/RJ14) 94.6969
Set SBM ECO push button 94.6980
SBM-WCI-01 web app module 94.5987
SBM-S BT sound module 94.5920, 94.5921
SBM-HOT set 94.6800
SBM-GLT-MOD HOME Modbus module 94.7077
SBM-GLT-KNX HOME KNX module 94.7078
SBM-FL75/150 coloured light module 94.5996, 94.6007
SBM remote start 94.5782
Emergency stop button 945777, 945779
Modular distributor RJ12 for connecting cable for control
panel and sauna bus
2001.5298
Infrared receiver for coloured light module and sound mod-
ule
94.6810
Humidity sensor 94.5726
Digital temperature sensor for bench heating 94.6617
Bench sensor 94.5725

EN-14 Installation Instructions for retailers - K-Tec
EN Identification
2.2 Nameplate
The nameplate is attached to the underside of the housing floor.
Nameplate (example)
2.3 Technical data
A Name F Country of origin
B Model G Manufacturer
C Item number H Protection class
D Mains supply I Manufacturing date
E Max. electrical switching output J Serial number
Ambient temperature during
operation
-10°C to +40°C
Storage temperature -20°C to +60°C
Housing, control panel Plastic
Relay box dimensions
(H x W x D)
240 x 230 x 70 mm
Control panel dimensions
(W x H x D)
127 x 130 x 25 mm,
mounting depth approx. 20 mm
Weight Approx. 1.5 kg
Gasofensteuergerät
Type K-Tec
Art.-Nr. 94 7588 00
230 V 1N ~ 50 Hz
Max. elektr. Schaltleistung 3,5 kW
Made in Germany
Kusatek GmbH, 35759 Driedorf
S-No. 12.19 00001
IPX4
A
B
C
D
E
F
G
I J
H

K-Tec - Installation Instructions for retailers EN-15
Identification
Outputs/inputs
Relay box
3 x RJ10 jack for sensor connection
4 x RJ14 jack for control panel and add-on
modules
Power supply 230 V 1N ~ 50 Hz
Switching output Max. 3.5 kW
Circuits 5 separate circuits with total output of 3.5 kW
Temperature control Measured room temperature: 30°C–125°C
Connection for lighting Min. 5 W (20 mA), max. 250 W
Connection for supply and
exhaust air fan (heater):
230 V 1N ~ 50 Hz, single-stage
Connection for cabin fan: 230 V 1N ~ 50 Hz, single-stage, max. 100 W
Sensor system Room temperature sensor, analogue or digital
Heating period limitation Up to 6 hrs/12 hrs/18 hrs/infinite
Control panel K-Tec
Control panel dimensions
(W x H x D)
127 x 130 x 25 mm,
mounting depth approx. 20 mm
Display TFT colour display 55 x 74 mm (3.5” diagonal)
Control panel outputs/inputs
1 x RJ10 jack for relay box
1 x connection for memory card
(microSD memory card reader)
Operation Buttons for on/off and lighting, jog dial

EN-16 Installation Instructions for retailers - K-Tec
EN Identification
2.4 Functions and applications
The K-Tec is used to control gas-powered heaters in sauna cabins and vari-
ous extra functions, such as:
Up to 8 burners and the corresponding fans
Evaluating burner malfunctions (up to 4 inputs)
Vaporiser or automatic water splash for humidification
HOT function
AquaDisp or WDT automatic water splash
Heater, bench, and humidity sensor
Cabin fan
Burners and fans
The output at each terminal may not exceed a 0.5 kW AC3 load. If more
than 0.5 kW is required, a contactor must be connected during installation.
To connect more than one line per circuit, the corresponding lines must
have an identical line cross-section. You must connect the lines in the on-
site plug-in modules that are separate from the K-Tec power extension unit.
See Example – plug-in module (optional), EN-61
Air supply fan
The air supply fans must be single-stage.
Exhaust gas fans
The connected exhaust gas fans automatically run for 10 minutes once
the device shuts off.
Evaluating a burner fault
The line for the burner fault can be connected to the HV-IN terminal. If
there are multiple burners, it can also function as a manifold. Alter-
nately, the IO-EXT-HV module can be used. If 4 burners are connected,
each burner is assigned its own fault input so burner faults can be
assigned to the corresponding burner.
If more than 4 burners are connected, two fault lines must be assigned
to one fault input.

K-Tec - Installation Instructions for retailers EN-17
Identification
Temperature sensor, emergency button and other functions
Each cabin must have sensors for monitoring the temperature. They may
be analogue or digital sensors. The KTY 11/5 TO-92 Mini is the only ana-
logue temperature sensor that may be used.
Temperature sensor
Each cabin must have one temperature sensor. It may be an analogue or
digital sensor.
Bench sensor
A bench sensor may also be connected. It may be an analogue or digital
sensor.
Humidity sensor
A digital humidity sensor may also be connected. A humidity sensor
should be connected if a vaporiser is connected.
Emergency button and manifold fault
An emergency button, whose signal is emitted via an output, may be
connected. Fault messages may also be issued via this output.
Mains supply and low voltage
The circuit board has switch contacts for mains supply (HV) and low
voltage (LV). You can configure their use for emergency functions or the
manifold fault line.
Plug-in modules (optional)
A plug-in module can be added to the circuit board of the relay box. It
enhances the functions of the K-Tec control panel.
LV module
Four inputs and four outputs for various cabin statuses and connections
to a PLC.

EN-18 Installation Instructions for retailers - K-Tec
EN Identification
Vaporiser
The following vaporisers can be connected:
SteamRock Basic steam generator
(has one status output)
SteamAttrac steam generator
(has one status output)
WDT automatic water splash
(has one HOT function)
Vaporiser without status output
If a vaporiser with status output or a WDT automatic water splash is con-
nected, the burner faults must be connected to the IO-EXT-HV module.
The vaporiser’s status output or the connection for the HOT request is con-
nected to the HV-IN terminal and evaluated by the electronics.

K-Tec - Installation Instructions for retailers EN-19
Identification
2.5 Relay box
Housing
Unit switch
The relay box is equipped with an on/off switch on the left side.
A Housing cover – top piece
B Housing
C Retaining screws for top piece
D Unit switch
E Retaining screws for bottom piece
F Housing cover – bottom piece
Position I:
Relay box is switched on (factory setting).
The relay box is ready for operation in standby mode.
Position 0:
Relay box is completely switched off.
Parts of the circuit board are still energised.
Position II:
Cabin lighting is switched on, relay box is switched off.
Position for maintenance and cleaning.
F
A
C
E
C
C
E
E
D
B

EN-20 Installation Instructions for retailers - K-Tec
EN Identification
Internal view
The cables for mains supply and low voltage can be routed through the
holes on the back side or base of the housing.
Holes can be punched out at the predetermined points where needed.
For more information on the circuit board, see
4.2 Circuit board assignment, EN-51
A Top mounting hole
B Housing cover fixtures – top piece
C Unit switch
D Circuit board
E Housing cover fixtures – bottom
piece
F Lower mounting holes
G Feed-throughs for cables with mains
voltage
H Feed-throughs for cables with low
voltage
C
A
B
B
F
D
B
E
F
EE G H