EOS Herkules XL S120 HD User manual

Druck-Nr.: 2902 5322
Stand: 15/23
EN
Made in Germany
EOS Herkules XL S120 HD
EOS Herkules XL S120 Vapor HD
Heater for Sauna Cabins
Installation and Operating Instructions

EN-2 Installation and Operating Instructions - EOS Herkules XL S120 HD
Documentation
EN
Documentation
Manufacturer
Original installation instructions EN
Copyright for these installation 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
Revision history
EOS Saunatechnik GmbH
Schneiderstriesch 1
35759 Driedorf, Germany
Tel. [phone]
Fax [phone]
Email servicecent[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
Date Version Description
05.012023 02.00 Conversion to HD connections using a copper strip.
30 July 2020 01.00 First version

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-3
Contents
Documentation..................................................................................................EN-2
1 General safety instructions..........................................................................EN-5
1.1 Mounting and electrical installation .................................................EN-5
1.2 Operator instruction ...............................................................................EN-8
1.3 Safety levels............................................................................................. EN-10
1.4 Standards and regulations................................................................. EN-10
2 Identification.................................................................................................... EN-11
2.1 Requirements for operation.............................................................. EN-11
2.2 Nameplate ............................................................................................... EN-11
2.3 Scope of delivery................................................................................... EN-12
2.4 Accessories .............................................................................................. EN-13
2.5 Technical data ........................................................................................ EN-14
2.6 Intended use........................................................................................... EN-15
3 Installation ........................................................................................................ EN-17
3.1 Specifications for the cabin............................................................... EN-17
3.1.1 Installation site ...................................................................... EN-18
3.1.2 Air inlets and outlets............................................................ EN-19
3.1.3 Connecting cables................................................................ EN-21
3.2 Temperature sensor in the cabin .................................................... EN-22
3.3 Mounting the sauna heater............................................................... EN-23
4 Electrical installation.................................................................................... EN-26
4.1 General instructions for electrical installation............................ EN-26
4.2 Inner wiring diagrams ........................................................................ EN-27
4.3 Internal wiring ....................................................................................... EN-32
4.4 Vaporiser circuit diagrams
(EOS Herkules XL S120 Vapor HD only)......................................... EN-34
4.5 Establishing an electrical connection............................................ EN-36
4.6 Heating period limitation................................................................... EN-40
4.7 Connecting the water supply
(EOS Herkules XL S120 Vapor HD only)......................................... EN-40
4.8 Positioning the heater......................................................................... EN-43
5 Commissioning ............................................................................................... EN-46
5.1 Filling with stones................................................................................. EN-47
5.2 Starting the heater................................................................................ EN-48
5.3 Switching the heater on remotely .................................................. EN-48
5.4 Water splash............................................................................................ EN-48
5.5 Commissioning the vaporiser
(Herkules XL S120 Vapor only) ......................................................... EN-49

EN-4 Installation and Operating Instructions - EOS Herkules XL S120 HD
EN
6 Service and maintenance...........................................................................EN-50
6.1 Cleaning....................................................................................................EN-50
6.2 Sauna stones...........................................................................................EN-51
6.3 Descaling the vaporiser
(Herkules XL S120 Vapor HD only) ..................................................EN-52
6.4 Cleaning the vaporiser
(Herkules XL S120 Vapor HD only) ..................................................EN-55
6.5 Replacing the tubular heating element........................................EN-58
6.6 Troubleshooting....................................................................................EN-62
7 General terms and conditions of service ...........................................EN-63
8 Disposal ..............................................................................................................EN-66

1
EOS Herkules XL S120 HD - Installation and Operating Instructions EN-5
General safety instructions
General safety instructions
1.1 Mounting and electrical installation
These installation instructions are intended for qualified person-
nel familiar with the laws and regulations applicable to electrical
installations at the installation site. Observe the following general
safety instructions during mounting, configuration and commis-
sioning 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 heater, vaporiser, relay boxes
and other electrical systems or equipment with a fixed mains
connection must only be performed by a trained electrician
from an authorised electrical company.
Ensure compliance with the standards and regulations for elec-
trical installation in your country.
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 specialist.
Fire hazard from
overheating
Insufficient ventilation can lead to device overheating and fire.
Install air inlets and outlets in the cabin.
Observe the cabin manufacturer’s safety and installation in-
structions.
Risk of fire due to
sauna stones
It is possible for hot stones or stone pieces to fall out of the rock
store.
The sauna heater may not be placed on a floor made of easily
flammable material (laminate or synthetic flooring, etc.). Ce-
ramic tiles are recommended as a flooring option.

EN-6 Installation and Operating Instructions - EOS Herkules XL S120 HD
General safety instructions
EN
Risk of burns from
hot glass
Glass surfaces in the cabin become hot while the sauna is in oper-
ation.
When installing the cabin, ensure that the touchable glass sur-
faces on the outside of the cabin may reach a maximum tem-
perature of 76°C. Appropriate protection may need to be
installed if required.
Risk of burns from
hot unit
During operation, the sauna heater may become hot and, if
touched, could cause burns.
Maintain a safe distance.
Sauna cabin and
sauna heater
The sauna cabin must be constructed with proper material and
built in a professional manner, and the sauna heater must be suit-
ed for the cabin.
The sauna heater may only be used in sauna cabins made of
suitable, low-resin and untreated material (e.g. Nordic spruce).
The control unit must not be used in the cabin.
Multiple heaters may be installed in one sauna if the heater out-
put can properly supply the cabin volume. In this case, depend-
ing on the position, an additional safety temperature limiter
must be installed for each additional heater.
The sauna heater is not designed to be installed or set up in an
alcove or under a bench or sloping roof unless this sauna heater
is specifically designed and approved for this type of installa-
tion.
Receptacles may not be installed inside the sauna cabin.
Each sauna cabin must have air inlets and outlets. The air inlets
and outlets may be installed from below or from behind the
heater. The minimum dimensions of the air inlets and outlets
can be found here: 2.5 Technical data, EN-14 and 3.1.2 Air in-
lets and outlets, EN-19.
The air outlet is always installed in the lower part of the wall, di-
agonal to the heater. The air inlets and outlets must not be
closed. Observe the instructions provided by your sauna cabin
manufacturer.
Use one of the control units listed below to check and control
the sauna heater. This control unit is fixed to a suitable location
on the cabin's external wall, and the corresponding sensors ac-
cording to the installation instructions that accompany the
control units inside the sauna cabin.
Electrical installations and equipment in the sauna cabin must
comply with IEC 60364-7-703 (DIN VDE 0100-703).

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-7
General safety instructions
The cabin lighting must be safe for sauna cabin use and in-
stalled in such a way that it can be used safely in a sauna cabin.
Ensure that the heater is installed in compliance with the stand-
ards and legal norms valid in your country.
The cabin door must open outward and must not have a lock
that cannot be opened in the case of failure. We recommend
magnetic or spring locks.
Water connection For Herkules XL S120 Vapor HD, prevent water from flowing from
the water supply and the box for the heater's water level control
back into the piping system for potable water.
Close the shut-off valve if the connection to potable water is not
used for an extended period of time.

EN-8 Installation and Operating Instructions - EOS Herkules XL S120 HD
General safety instructions
EN
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.
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 specialist.
Repairs and installations must only be performed by a trained
specialist.
The system must be disconnected and removed entirely from
the mains supply before commencing repair work.
Use only original spare parts from the manufacturer.
Fire hazard Objects placed on the sauna heaters can ignite and cause fires.
Attach the heater guard rail.
Do not place objects on the sauna heater.
Fill the rock store as directed.
Inspect the sauna cabin prior to each recommissioning and en-
sure that no towels, cleaning agents or other objects are lying
on the sauna heater or vaporiser.
If you switch on the heater using pre-set timers or remotely, at-
tach a protective cover to the heater or install a suitable safety
system.
Risk of fire due to
substances in holder
The holder must not be used if the heater is operated without the
vaporiser function (Finnish sauna mode). Substances in the holder
pose a risk of fire because they can easily be ignited.
Never place herbs or similar substances/objects in the holder if
the heater is being operated without the vaporiser function.
Observe the manufacturer's specifications when adding sauna
essences to the water.
Never leave herbal sachets in the holder if the system has a con-
trol unit with a post-heating time option; they could dry quickly
and catch fire.

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-9
General safety instructions
Risk of scalding from
hot steam
There is a risk of scalding from hot steam at the steam emission
outlet when using the vaporiser (Herkules XL S120 Vapor HD). The
steam escapes from the long sides of the holder.
Add essences and herbs to the holder only from the front side
of the heater.
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 cabin.
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
and 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.
Water lime content Herkules XL S120 Vapor HD: Lime deposits can impact the ability
of the vaporiser to function properly.
If the water has a lime content of more than 1.3 millimole of cal-
cium oxide per litre (hardness class I or hardness levels 1–7 in
Germany), we recommend installing a decalcification system. If
a decalcification system is not installed, you must manually des-
cale the vaporiser regularly. The higher the lime content in the
water used, the more often the vaporiser must be descaled.

EN-10 Installation and Operating Instructions - EOS Herkules XL S120 HD
General safety instructions
EN
Operation by
children or persons
with reduced mental
capacity
This unit should not be used by children or persons with reduced
mental capacity or limited physical or sensory abilities.
Children must be supervised to ensure they do not play with
the unit.
Children and persons who have not received proper instruction
must not clean or service the system.
1.3 Safety levels
Safety instructions and important operating instructions are classified.
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.

2
EOS Herkules XL S120 HD - Installation and Operating Instructions EN-11
Identification
Identification
Herkules XL S120 HD is an electrically heated sauna heater available in a
variety of output capacities. The ‘Vapor’version also has an installed vapor-
iser that can be used to operate a steamy hot-air bath.
2.1 Requirements for operation
The heater must be operated with one of the following control units:
The power extension units required depend on the output capacity of the
sauna heater. See 2.5 Technical data, EN-14
The sauna heater can be operated with one of the following control units:
EmoStyle series
EmoTec series
EmoTouch series
Econ series (Econ D2 and higher)
Compact series
The control unit is not included in the scope of delivery.
2.2 Nameplate
Nameplate
A Name
B Model
C Item number
D Electrical connection
E Country of origin
F Manufacturer
G Heater output
H Manufacturing date
I Serial number
Elektro-Saunaofen
Type EOS Herkules XL S120 HD
Art. Nr. 94 XXXX 00
400V 3N ~ 50 Hz XX kW
IPX4
Made in Germany 00001S-No. 41.22
EOS SAUNATECHNIK GmbH, Schneiderstriesch 1, 35759 Driedorf
A
B
C
E
F
H I
D
G

EN-12 Installation and Operating Instructions - EOS Herkules XL S120 HD
Identification
EN
2.3 Scope of delivery
Check the unit upon delivery to ensure that all components were delivered
and that it is in proper working order. Contact your distributor if compo-
nents are missing or damaged. The unit must not be operated if compo-
nents are missing or damaged.
The following parts are included in the scope of delivery:
Scope of delivery
Herkules XL S120 Vapor HD comes with a pre-mounted mains water con-
nection (FWA01) on the rear side. Herkules XL S120 HD does not have this
pre-mounted mains water connection.
Warning plate (D)
A Base mount for holder
B Sauna heater, pictured:
EOS Herkules XL S120 Vapor HD
C Holder
D Warning plate with 2 screws
(2.9 mm x 9.5 mm)
E Installation instructions
Caution: observe the instructions.
Do not touch hot surfaces.
Do not place objects on the heater.
Read the instructions.
C
A
B
D
E

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-13
Identification
2.4 Accessories
A sauna heater guard rail may be placed around the upper edge of the
heater. It prevents accidental contact with hot parts of the heater.
To ensure that the sauna heater is switched off or remains off if, for exam-
ple, a towel is lying on it, it can be equipped with a safety device.
The EOSafe D door supervision device can be used to determine if an
unauthorised person has entered the sauna.
The EOSafe L heater monitor can be used to prevent the heater from
being switched on if objects have been placed on the heater.
Accessories Item no.
Universal sauna stones, 20 kg, caliber 100–150 mm
Required: 120 kg
94.7340
Heater guard rail bracket (bracket and guard rail made of
wood)
94.5679
Safety device type 5 94.4725
EOSafe D 94.7149
EOSafe L with 25 mm reflector 94.7151
EOSafe L with 50 mm reflector 94.7150
EOSafe L & D with 25 mm reflector 94.7153
EOSafe L & D with 50 mm reflector 94.7152

EN-14 Installation and Operating Instructions - EOS Herkules XL S120 HD
Identification
EN
2.5 Technical data
*LSG = power extension unit
All line cross-section specifications are the minimum cross-sections of a
copper line.
Heater output per DIN 18 kW 24 kW 30 kW
Vaporiser output 3 kW 3 kW 4 kW
Electrical connection 400 V 3N ~ 50 Hz
for cabin volumes 60–75 m335–45 m³ 45–65 m³
Minimum dimensions of air inlets and out-
lets 50 x 6 cm 50 x 8 cm 50 x 10 cm
Weight without stones and packaging Approx. 85 kg
Unit dimensions 85 x 96 x 53 cm
Stone filling 120 kg, caliber 100–150 mm
Power extension unit (LSG) required *
Without vaporiser/with vaporiser LSG 18/LSG 18 H LSG 36/LSG 36 H
For use with the control units Econ series, EmoTec series, EmoStyle series, Compact series,
EmoTouch series
Area of application For commercial sauna cabins
Leakage current Max. 0.75 mA per kW heater output
Fuse protection for control unit 3 x 16 A 3 x 16 A 1 x 16 A
Fuse protection for LSG unit 3 x 16 A 3 x 35 A 3 x 63 A
Connection control unit – heater
(Herkules XL S120 HD) 5 x 1.5 mm² -
Connection control unit – heater
(Herkules XL S120 HD Vapor)
5 x 1.5 mm²
4 x 1.5 mm²
5 x 1.5 mm²
3 x 1.5 mm² 3 x 1.5 mm²
Connection mains – control unit 5 x 2.5 mm² 5 x 2.5 mm² 3 x 1.5 mm²
Connection mains – power extension unit 5 x 2.5 mm² 5 x 6 mm² 5 x 16 mm²
Connection LSG – heater (without vapor-
iser) 5 x 1.5 mm² 2 x (5 x 4 mm²) 2 x (5 x 6 mm²)
Connection LSG – heater (Vapor) 5 x 1.5 mm² 5 x 4 mm² and
4 x 2.5 mm²
2 x (5 x 4 mm²) and
1 x (4 x 2.5 mm²)
Connection LSG – control unit 4 x 1.5 mm2

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-15
Identification
2.6 Intended use
This sauna heater is intended solely for the purpose of heating sauna cab-
ins, together with a suitable control unit and one relay box.
Herkules XL S120 HD is a sauna heater that stands on the floor. It is suitable
for cabins for commercial use.
The heater is not suitable for outdoor use.
It must be operated only in sauna cabins and may not be exposed to envi-
ronmental conditions such as extreme humidity and moisture or the possi-
ble formation of condensation or corrosive substances in the ambient air,
as well as other weather conditions.
Any use beyond this is considered improper use. Proper use also includes
compliance with operating, maintenance and servicing requirements.
Foreseeable misuse
The following are considered instances of foreseeable misuse:
The heater power does not match the sauna volume.
The control and sensor cable plugs are plugged in incorrectly.
The unit is operated without knowledge of or compliance with the
safety instructions.
Operating, service and maintenance requirements are not observed.
The unit is operated after technical or other modifications are made to
the relay box.
The unit is operated with insufficient air supply or exhaust air.
The unit is operated without sauna stones or with a rock store that is not
filled as directed.
The unit is operated by children under 8 years of age.
The unit is operated by children 8 years of age or older, or persons with
reduced mental capacity who have not been thoroughly instructed in
its use.
The manufacturer is not liable for unauthorised modifications made to the
equipment and damages resulting from these modifications. The person
modifying the equipment alone shall bear the associated risk.

EN-16 Installation and Operating Instructions - EOS Herkules XL S120 HD
Identification
EN
General instructions
Please note that an optimal sauna climate can be achieved only if the
cabin with its air inlets and outlets, the sauna heater, and the control
unit are synchronized.
Observe the specifications and information provided by your sauna
retailer.
The sauna heaters heat the sauna cabin with heated convection air.
Fresh air is drawn in through the air inlet. It is warmed and rises (convec-
tion) and is then circulated in the cabin. Some of the used air is pushed
out of the cabin through the cabin's air outlet.
This creates a typical sauna climate in which temperatures of approx.
110°C are achieved directly below the ceiling. These temperatures drop
to approx. 30–40°C in the cabin along the floor. Therefore, it is not unu-
sual that if the temperature sensor above the sauna heater reads 110°C,
the thermometer that is mounted approx. 20–25 cm below the cabin
ceiling on the cabin wall reads only 85°C.
When the max. temperature is set for the area around the upper sauna
bench, the bathing temperature is typically between 80°C and 90°C.
Please note that the highest temperatures in the cabin are always above
the sauna heater and that is where the temperature sensor and safety
temperature limiter should be mounted according to the installation
instructions.
The first time the cabin is heated, you may notice a slight odour result-
ing from the evaporation of consumables used in the manufacturing
processes. Air out your cabin once it has been heated and before using
the sauna.

3
EOS Herkules XL S120 HD - Installation and Operating Instructions EN-17
Installation
Installation
This chapter describes how to install the Herkules XL S120 HD/Vapor HD
sauna heater. Prior to installing the heater, air inlets and outlets must be
installed in the cabin.
It may be necessary to mount additional fans in the inlets/outlets.
All protective films must be removed.
NOTICE
Damage due to incorrect mounting location
The heater is not suitable for outdoor use.
The heater must be operated only inside sauna cabins and may
not be exposed to environmental conditions such as extreme
humidity and moisture or the possible formation of condensa-
tion or corrosive substances in the ambient air, as well as other
weather conditions.
The heater is not designed to be installed or set up in an alcove
or under a bench or sloping roof.
3.1 Specifications for the cabin
The cabin must be planned and installed according to specifications before
the heater is installed. It must be ensured that the heater can be removed
from the cabin even after the cabin has been installed
All electrical installations laid inside the cabin must be suitable for a tem-
perature of at least 170°C.
All lines must be routed in such a way that they are well-protected, e.g. in a
cable duct.
If single-core lines are used as connecting cables, they must be protected
by a flexible metal hose that is connected to the protective conductor.
The minimum cross-section of the connecting cable and the recom-
mended heater power in kW in relation to the cabin volume can be found
here: 22.5 Technical data, EN-14.
In general, it should be noted that the sauna heater must not be set on a
floor made of highly flammable material such as laminate, flooring made
of plastic material, etc. Ceramic tiles are recommended as a flooring option.
Floor heating in the sauna cabin increases the temperature of the floor's
surface temperature.

EN-18 Installation and Operating Instructions - EOS Herkules XL S120 HD
Installation
EN
3.1.1 Installation site
The sauna heater’s output selected must be appropriate for the cabin vol-
ume; see 2.5 Technical data, EN-14.
Ceiling height of at least 210 cm
Distance from top edge of sauna heater to cabin ceiling min. 125 cm
Distance heater – cabin wall min. 8 cm
Distance heater – bench min. 8 cm
Distance heater – flammable material min. 8 cm
Minimum distances in the cabin in cm
A Cabin ceiling
B Temperature sensor
C Cabin wall
D Sauna heater
E Air inlet
F Heater guard rail
≥ 12585
8
~ 51
8
~ 85
≥ 210
96 53
8
A
DD
CC
F
E
A
B
B

EOS Herkules XL S120 HD - Installation and Operating Instructions EN-19
Installation
Minimum distances to the sauna heater in cm
3.1.2 Air inlets and outlets
WARNING
Risk of fire due to insufficient ventilation
The sauna heater can overheat if the air supply is insufficient.
There is a risk of death due to fire.
Ensure that the air inlets and outlets provide sufficient ventila-
tion. Install a fan if necessary.
Start the sauna only after all air inlets and outlets have been
opened.
NOTICE
Heating process takes too long
If the heating process takes a long time, the underlying reason is
that the sauna heater receives insufficient air.
A minimum of 5 times the cabin volume of air per hour must be
exchanged.
A Cabin wall
B Sauna heater
C Heater guard rail
96
8 8
8
8
53
B
A
C

EN-20 Installation and Operating Instructions - EOS Herkules XL S120 HD
Installation
EN
Air inlets and outlets must be installed in the cabin to ensure a sufficient air
flow in the cabin and to prevent the heater from overheating.
To support ventilation, additional fans can be mounted, preferably on the
side of the exhaust air.
The required size of the air inlets and outlets depends on the heater out-
put; see 2.5 Technical data, EN-14.
Depending on the location of the heater, the air inlet must be installed
behind or below the heater.
Heater is located at the cabin wall, EN-20
Heater is located in the middle of the cabin or in front of a glass wall, 
EN-21
Air outlet
The air outlet must meet the following criteria:
Location: Across from the sauna heater
Height: 30–50 cm above the cabin floor
Heater is located at the cabin wall
The air inlet must meet the following criteria:
Location: Behind the sauna heater
Height: approx. 10 cm above the cabin floor
If there is still not enough fresh air to reach the sauna heater, a fan must be
installed at the opening outside of the cabin.
Installing the air inlet in the cabin wall