EOS Zeus User manual

Druck-Nr.: 2902 4847
Stand: 48/20
EN
Made in Germany
EOS Zeus / Zeus L
Heater for Sauna Cabins
Installation and Operating Instructions

EN-2 Installation and Operating Instructions - EOS Zeus / Zeus L
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 [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
Date Version Description
1 March 2021 01.00 First version

EOS Zeus / Zeus L - Installation and Operating Instructions EN-3
Contents
Documentation..................................................................................................EN-2
1 General safety instructions..........................................................................EN-5
1.1 Safety levels................................................................................................EN-5
1.2 Mounting and electrical installation .................................................EN-6
1.3 Operator instruction ...............................................................................EN-8
1.4 Standards and regulations ...................................................................EN-9
2 Identification ....................................................................................................EN-10
2.1 Requirements for operation ..............................................................EN-10
2.2 Nameplate................................................................................................EN-10
2.3 Scope of delivery....................................................................................EN-11
2.4 Intended use............................................................................................EN-12
2.5 Technical data .........................................................................................EN-14
3 Installation.........................................................................................................EN-15
3.1 Specifications for the cabin................................................................EN-15
3.1.1 Installation site .......................................................................EN-16
3.1.2 Air inlets and outlets.............................................................EN-17
3.1.3 Connection cable...................................................................EN-20
3.2 Installing the temperature sensor....................................................EN-20
3.3 Installing the heater..............................................................................EN-21
3.4 Installing the heater guard rail (optional) .....................................EN-23
4 Connections.......................................................................................................EN-28
4.1 General instructions for electrical installation.............................EN-28
4.2 Connections.............................................................................................EN-28
4.2.1 Terminal diagram 12 kW/16 kW .......................................EN-29
4.2.2 Terminal diagram 20 kW–36 kW ......................................EN-29
4.2.3 Internal wiring 12 kW–36 kW.............................................EN-30
4.2.4 Establishing an electrical connection.............................EN-32
4.3 Heating time limitation........................................................................EN-33
5 Commissioning ................................................................................................EN-34
5.1 Filling stones............................................................................................EN-35
5.2 Starting the heater.................................................................................EN-36
5.3 Commissioning by remote control..................................................EN-36
5.4 Water splash.............................................................................................EN-37

EN-4 Installation and Operating Instructions - EOS Zeus / Zeus L
EN
6 Maintenance..................................................................................................... EN-38
6.1 Cleaning the heater.............................................................................. EN-38
6.2 Replacing sauna stones ...................................................................... EN-39
6.3 Replacing the tubular heating elements...................................... EN-39
6.4 Troubleshooting.................................................................................... EN-44
7 General terms and conditions of service ........................................... EN-45
8Disposal.............................................................................................................. EN-47

EOS Zeus / Zeus L - Installation and Operating Instructions EN-5
General safety instructions
General safety instructions
1.1 Safety levels
Safety instructions and important operating instructions are clas-
sified. 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.

EN-6 Installation and Operating Instructions - EOS Zeus / Zeus L
General safety instructions
EN
1.2 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 also applies follow-
ing completion of the installation work.
The electrical installation of the heater, relay boxes and other
electrical systems or equipment with a fixed mains connection
must only be performed by a trained electrician from an author-
ised electrical company.
Ensure compliance with the applicable standards and regula-
tions for electrical installation.
The system must be disconnected and removed entirely 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 the air inlet and outlet 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 (e.g. laminate or synthetic flooring). Ceram-
ic tiles are recommended as a flooring option.
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.

EOS Zeus / Zeus L - Installation and Operating Instructions EN-7
General safety instructions
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
heater
The sauna cabin must be constructed with proper material and
built in a professional manner, and the heater must be suited for
the cabin.
Sauna heaters and control units may only be used in sauna cab-
ins made of suitable, low-resin and untreated material (e.g. Nor-
dic spruce).
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 the 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 below or behind the sauna heater,
approx. 5 to 10 cm above the floor. The minimum dimensions
of the air inlets and outlets can be found here: 2.5 Technical
data, EN-14, 3.1.2 Air inlets and outlets, EN-17.
The exhaust openings are always installed in the lower part of
the wall diagonal to the sauna heater. The supply and exhaust
openings must not be closed. Please 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 sensor
housings according to the installation instructions that accom-
pany the control units inside the sauna cabin.
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.

EN-8 Installation and Operating Instructions - EOS Zeus / Zeus L
General safety instructions
EN
1.3 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 arisesin the event
of improper repair work. This risk also applies 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 heater can easily be ignited and cause fires.
Do not place objects on the heater.
Fill the stone grate as directed.
Inspect the sauna cabin prior to each commissioning.
If you switch on the heater using pre-set timers or a remote con-
trol, attach a protective cover to the heater or install a suitable
safety device.
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.

EOS Zeus / Zeus L - Installation and Operating Instructions EN-9
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.
Operating the unit This unit should not be used by children or persons with reduced
mental capacity or limited physical or sensory abilities. Children
must not play with the unit. Cleaning and user maintenance must
not be performed by children.
Children must be supervised to ensure they do not play with
the unit.
1.4 Standards and regulations
For an overview of the standards that were observed during design and
construction of the sauna heaters, please refer to the individual product's
technical data sheet that can be downloaded from www.eos-sauna.com.

EN-10 Installation and Operating Instructions - EOS Zeus / Zeus L
Identification
EN
Identification
Zeus is an electrically heated Finnish sauna heater available in a variety of
output capacities.
Zeus L is designed for installation in the middle of the cabin.
Zeus is designed for installation in a cabin corner or in front of a wall. It
is equipped with an asymmetrical, elevated outer casing (plate).
2.1 Requirements for operation
The heater must be operated with one of the following control units:
Econ series
EmoTec series
EmoStyle series
EmoTouch series
Compact series
The control unit is not included in the scope of delivery.
Depending on the output capacity of the heater, either output controller
L09 R or LSG 36 is required. See 2.5 Technical data, EN-14
2.2 Nameplate
Nameplate (example)
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 Zeus L 120 - Rust marbel
Art.-Nr. 94 6695 01
400 V 3N AC 50 Hz 12 kW
Made in Germany
EOS-SAUNATECHNIK GmbH, 35759 Driedorf
S-No. 12.19 00001
IPX4
A
B
C
E
F
H I
D
G

EOS Zeus / Zeus L - Installation and Operating Instructions EN-11
Identification
2.3 Scope of delivery
Check the delivery to ensure that all components were delivered and that
the unit is in proper working order. Contact your distributor if components
are missing or damaged. The unit must not be operated if components are
missing or damaged.
The following parts are included in the scope of delivery:
Scope of delivery – Zeus as example
* The supporting slots on the tubular heating elements are included in the
scope of delivery only for heaters with output capacities of 12–24 kW. The
stone attachment frame (B) is supplied for heaters with output capacities
of 30 kW and 36 kW. The supporting slots and stone attachment frame pre-
vent stones from falling between the tubular heating elements. Otherwise,
the heavy weight of large stones could cause deformation of and damage
to the light-red (glowing) heating elements during operation.
A Sauna heater *
B Stone attachment frame;
only for 30 kW and 36 kW
C Installation instructions
D Connection cable with special
connectors
AB
C
D

EN-12 Installation and Operating Instructions - EOS Zeus / Zeus L
Identification
EN
Heater guard rail (optional)
A heater guard rail may be placed around the upper edge of the heater. It
prevents accidental contact with the hot heater.
2.4 Intended use
The EOS Zeus/Zeus L sauna heater is designed solely to heat sauna cabins
with a suitable control unit and an output controller.
EOS Zeus/Zeus L is a free-standing sauna heater that is suitable for com-
mercially used cabins.
The heater is not suitable for outdoor use.
It must be operated only inside buildings 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.
The manufacturer is not responsible for unauthorised modifications and
damages resulting from these modifications; the person modifying the
equipment alone shall bear the associated risk.
Foreseeable misuse
The following are considered instances of foreseeable misuse:
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 by children or persons with reduced mental capac-
ity or by persons who have not been thoroughly instructed in its use.
The unit is operated without sauna stones or with a rock store that is not
filled as directed.
Accessories (optional) Item no.
Heater guard rail 270° Abachi 94.6605
Walnut 94.6597
Heater guard rail 360° Abachi 94.6606
Walnut 94.6598
Installation kit 94.6761
Sauna stones, grain size 100–150 mm,
total volume approx. 100 kg
94.6227

EOS Zeus / Zeus L - Installation and Operating Instructions EN-13
Identification
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 unusual that if the tem-
perature sensor above the heater reads 110°C, the thermometer that is
mounted approx. 20–25 cm below the cabin ceiling on the sauna 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 for the control units.
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.

EN-14 Installation and Operating Instructions - EOS Zeus / Zeus L
Identification
EN
2.5 Technical data
Electrical connection – lines
Electrical connection – fuse protection
Heater
Heater output
Electrical
connection
Connection
mains –
control unit
Connection
mains –
output
controller
Connection
control unit –
heater
Connection
output
controller –
heater
Connection
control unit –
output
controller
12 kW
400 V 3N AC
50 Hz
5x2.5mm
2
5x2.5mm
2
5x1.5mm
2
5x1.5mm
2
4x1.5mm
2
16 kW
5x4mm
2
5x1.5mm
2
20 kW 5x4mm
2
24 kW 5x4mm
2
30 kW 3x1.5mm
25x10mm 2
-2x(5x6mm
2)
36 kW 3x1.5mm
25x16mm 22x(5x6mm 2)
Heater output Fuse protection
for control unit
Fuse
Output controller
(LSG)
12 kW
3x16A
3 x 16 A
16 kW 3 x 16 A
20 kW 3 x 25 A
24 kW 3 x 35 A
30 kW 1x16A 3 x 50 A
36 kW 1x16A 3 x 63 A
Heater
output
Unit
dimensions
ØxHincm
Cabin
volume
Minimum
size of air
inlet and
outlet
Weight
without
rocks
Stone filling
Output
controller
(LSG)
Control system
12 kW
Zeus
~ Ø 70 x 125
cm
Zeus L
~Ø70x79c
m
14–18 m350 x 6 cm
~Ø25cm
Zeus
approx. 1
45 kg
Zeus L
approx. 1
28 kg
~100kg
EmoTec L09 R Econ series
EmoTec series
EmoStyle series
EmoTouch
series
Compact series
16 kW 18–25 m3
20 kW 24–30 m350 x 8 cm
~ Ø 25–30 cm
LSG 36
24 kW 35–40 m3
30 kW 50–65 m350 x 10 cm
~ Ø 25–30 cm
36 kW 65–70 m3

EOS Zeus / Zeus L - Installation and Operating Instructions EN-15
Installation
Installation
This chapter describes how to install Zeus. Prior to installing the unit, 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 buildings and may not
be exposed to environmental conditions such as extreme hu-
midity and moisture or the possible formation of condensation
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. The width of the door must equal at least 72 cm.
The sauna heater must be level.
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.
Electrical lines
All electrical installations laid inside the cabin must be suitable for silicone
cables and a temperature 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.
EOS recommends laying all connecting cables through a bendable metal
tube connected to the protective conductor.

EN-16 Installation and Operating Instructions - EOS Zeus / Zeus L
Installation
EN
3.1.1 Installation site
The required cabin volume depends on the heater output. See
2.5 Technical data, EN-14.
The following distances must be observed:
Ceiling height min. 2100 mm
Distance between heater and cabin ceiling at least 1300 mm
Distance between heater and cabin wall at least 150 mm
Distance between heater guard rail and bench at least 100 mm
Dimensions in the cabin (in mm)
A Cabin ceiling
B Temperature sensor with safety
temperature limiter
C Cabin wall
D Heater
E Air inlet
F Heater guard rail
> 1300
320
~790
~1250
>
100
>
150
A
DD
A
C
C
F
B
B
EF

EOS Zeus / Zeus L - Installation and Operating Instructions EN-17
Installation
3.1.2 Air inlets and outlets
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.
The required size of the air inlets and outlets depends on the heater out-
put; see 2.5 Technical data, EN-14.
WARNING
Fire hazard from overheating
The 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.
Commission the cabin only after all air inlets and outlets have
been opened.
If the heating process takes a long time, the underlying reason is that the
heater receives insufficient air. A minimum of 5 times the cabin volume of
air per hour must be exchanged.
If, despite compliance with dimensions, there is still not enough fresh air to
reach the heater, a fan must be installed at the opening outside of the
cabin.
Depending on the location of the heater, the air inlet must be installed
behind or below the heater.
Air supply from below, EN-18
Air supply from the side, EN-19
Air outlet
The air outlet must meet the following criteria:
Location: Across from the heater
Height: 30–50 cm above the cabin floor
For more specifications, see 2.5 Technical data, EN-14.

EN-18 Installation and Operating Instructions - EOS Zeus / Zeus L
Installation
EN
Air supply from below
The air inlet must meet the following criteria:
Location: centred below the heater.
Dimensions: Ø depending on heater output 250–300 mm,
see 2.5 Technical data, EN-14.
Installing the air inlet in the cabin floor
This form of air supply requires that the slats on the bottom of the heater
are bent upward. See Setting up the heater, EN-22.
The slots are bent upward during heater manufacturing. They must be
checked before commissioning.
A Air supply through cabin floor B Slats open
~790 mm
BA

EOS Zeus / Zeus L - Installation and Operating Instructions EN-19
Installation
Air supply from the side
The air inlet can be either a large opening or two small openings.
The air inlet must meet the following criteria:
Location: From the side (in relation to the heater) at the height of the
lower openings.
A duct directs fresh air to the opening or openings.
A fan must be mounted at the beginning of the duct outside of the
cabin.
Installing the air inlet in the cabin wall
A Air inlet B Slots closed
A
B
> 150
A
A
A

EN-20 Installation and Operating Instructions - EOS Zeus / Zeus L
Installation
EN
3.1.3 Connection cable
The heater is connected to the sauna control unit and to the output con-
troller via a connection cable. These temperature-resistant silicone cables
are very pressure-sensitive and must be protected from damage during
installation. To do this, route a cable duct or empty pipes from the installa-
tion site of the heater up to the relay box. The radius for laying the cable
around a corner must equal a minimum of 100 mm (R100).
For more information, see the connection diagram Connections, 
EN-28.
3.2 Installing the temperature sensor
The heater sensor with the safety temperature limiter must be installed
where expected temperatures are the highest, meaning directly above the
heater.
See Dimensions in the cabin (in mm), EN-16.
The temperature sensor with the safety temperature limiter is not included
in the scope of delivery. See the separate installation instructions for the
control unit for information on installation.