Sentiotec just sauna combi User manual

Version 12/13 ID no. 50950101
EN
INSTRUCTIONS FOR INSTALLATION AND USE
English
Sauna control unit
just sauna combi
JUST-105D-CO / JUST-105W-CO

WORLD OF WELLNESS
Table of Contents
1. About this instruction manual 5
2. Important information for your safety 6
2.1. Intended use 6
2.2. Safety information for the installer 7
2.3. Safety information for the user 8
3. Product description 9
3.1. Scope of delivery 9
3.2. Accessories 9
3.3. Product functions 9
3.4. Sauna operating modes 10
3.5. Sensor operating modes 11
4. Installation 13
4.1. Installing the power unit 14
4.2. Installing the operating unit 15
4.3. Installing the heater sensor F1 with excess temperature fuse 16
4.4. Installing bench sensor F2 (optional) 17
4.5. Installing humidity temperature sensor FTS2 (optional) 18
4.6. Installing the foil sensor (optional) 19
5. Electrical connection 20
5.1. Connecting the power supply cable, heater and evaporator 21
5.2. Connecting the operating unit 21
5.3. Connecting the light 22
5.4. Connecting the fan (optional) 22
5.5. Connecting the additional output (optional) 22
5.6. Connecting the power booster (optional) 22
5.7. Connecting heater sensor F1 23

WORLD OF WELLNESS
EN
5.8. Installing bench sensor F2 (optional) 23
5.9. Installing humidity temperature sensor FTS2 (optional) 23
  24
5.11. Connecting the safety shut-off device 24
5.12. Remote start 25
5.13. Status output 25
5.14. Finishing installation 25
6. Performing tests 26
7. Connection diagram 28
8. Starting-up 29
8.1. Setting the fan operating mode 29
8.2. Activating single-sensor mode 29
8.3. Activating/deactivating phase alignment 30
8.4. Activating/deactivating the remote start function 30
8.5. Setting the light operating mode 31
8.6. Activating/deactivating the foil sensor 31
8.7. Status output 31
8.8. Setting the operating mode of the additional output 32
9. Operating elements 33
9.1. On the power unit 33
9.2. On the operating unit 33
9.3. Touch wheels 34
9.4. Touch wheel scaling 35
9.5. Power level display 36

WORLD OF WELLNESS
10.Operation 37
10.1. Switching on the light on the power unit (cleaning lights) 37
10.2. Switching on the power unit 37
10.3. Activating the operating unit 37
10.4. Starting sauna mode 38
10.5. Switching off sauna mode 38
10.6. Starting combi mode 38
10.7. Switching off combi mode 39
10.8. Switching on the additional output 39
10.9. Switching off the additional device 40
10.10.Switching on the light 41
10.11.Switching off the light 41
10.12.Switching on the fan 42
10.13.Switching off the fan 43
10.14.Deactivating the operating unit 43
10.15.Cancelling the post-drying programme: 43
10.16.Switching off the power unit 43
11.Cleaning and maintenance 44
11.1. Cleaning 44
11.2. Maintenance 44
12.Disposal 45
13.Troubleshooting 46
13.1. Error messages 46
13.2. Low-water display 47
14.Technical data 48

WORLD OF WELLNESS
EN
Instructions for installation and use p. 5/50
1.About this instruction manual
Read these instructions for installation and use carefully and keep them within
reach of the sauna control unit. This ensures that you can refer to information
regarding your safety and regarding operation at any time.
Symbols used for warning notices
In these instructions for installation and use, a warning notice located next to
an activity indicates that this activity poses a risk. Always observe the warning
notices. This prevents damage to property and injuries which could in the worst
case even be fatal.
The warning notices contain keywords, which have the following meanings:
DANGER!
Serious or fatal injury will occur if this warning notice is not observed.
WARNING!
Serious or fatal injury can occur if this warning notice is not observed.
CAUTION!
Minor injuries can occur if this warning notice is not observed.
ATTENTION!
This keyword is a warning that damage to property can occur.
Other symbols
This symbol indicates tips and useful information.
These instructions for installation and use can also be found in the down-
loads section of our website: www.sentiotec.com.

WORLD OF WELLNESS
Instructions for installation and use p. 6/50
2.Important information for your safety
The sauna control unit just sauna combi has been produced in ac-
cordance with the applicable safety regulations for technical units.
However, hazards may occur during use. Therefore adhere to the

the individual chapters. Also observe the safety information for the
devices connected.
2.1. Intended use
The sauna control unit just sauna combi is used for operating and
controlling sauna heaters, lighting units and ventilators in a private
household in accordance with the technical data.
The sauna control unit just sauna combi is only suitable for instal-
lation outside the sauna room.
The remote start function provided by the sauna control unit just
sauna combi is deactivated when the unit leaves the factory. When
the remote start function is activated when starting up the unit for

used for operating and controlling a sauna heater which has been

19.101 of EN 60335-2-53. Alternatively, a suitable safety shut-off
device can be installed in or above the heater.
Any use exceeding this scope is considered improper use. Improper
use can result in damage to the product, in severe injuries or death.

WORLD OF WELLNESS
EN
Instructions for installation and use p. 7/50
2.2. Safety information for the installer


Work on the sauna control unit may only be performed when the
power has been disconnected.
A three-phase shut-off device with a 3 mm contact opening must
be provided during installation. This is provided by the fuse.
The sauna control unit must be installed outside the sauna room
at a height of approx. 1.70 m or in accordance with the recom-
mendation issued by the sauna manufacturer. The ambient
temperature must be within a range spanning -10 °C to +40 °C.
The heater sensor must be attached in a way that it is not af-

The heater supply cable must have a minimum cross-section of
2.5 mm2and be temperature resistant up to 150 °C.
Also comply with the regulations applicable at the installation
location.
For your own safety, consult your supplier in the event of prob-

instructions.

WORLD OF WELLNESS
Instructions for installation and use p. 8/50
2.3. Safety information for the user
The device must not be used by children under 8 years of age.
The device may only be used by children above 8 years of age,
by persons with limited psychological, sensory or mental capa-
bilities or by persons with lack of experience/knowledge under
the following conditions:
– When they are supervised.
– When they have been shown how to use the device safely
and are aware of the hazards that could occur.
Children must not play with the sauna control unit.
Children under 14 years of age may only clean the sauna control
unit if they are supervised.
 -
ence of alcohol, medication or drugs.
 
sauna heater before the sauna control unit is switched on.
 
heater before activating stand-by mode for the remote start.

front of the infrared lamp before the sauna control unit is switched
on.
 
heater before activating the infrared lamp or the stand-by mode
for the remote start.
For your own safety, consult your supplier in the event of prob-

instructions.

WORLD OF WELLNESS
EN
Instructions for installation and use p. 9/50
3.Product description
3.1. Scope of delivery
Operating unit
Power unit
Heater sensor with integrated excess temperature fuse
Sensor wires
Installation material
Wire jumper for bridging terminals V1 and Wm for combi heaters without
automatic low-water shut-off
3.2. Accessories
Bench sensor (item number: O-F2)
Humidity temperature sensor (item number: O-FTS2)
Foil sensor (item number: P-ISF-FF)
Power booster (item number: O-S2-18 / O-S2-30)
Safety shut-off (item number: HT-SWL)
3.3. Product functions
The sauna control unit just sauna combi features the following functions:
Regulation of sauna heaters with a heating output of up to 10.5 kW in the
temperature range spanning 55 °C to 110 °C (sauna mode)
Regulation of combi heaters with a heating output of up to 10.5 kW and
evaporator output of up to 3.5 kW in the temperature range spanning 30 °C
to 85 °C and a humidity range spanning 30% to 85% (combi-mode)
A power booster allows the maximum heating output to be increased from
10.5 kW to 18 kW or 30 kW.
Optional dimming or activation of a room light (up to 100 W)
Optional dimmer function or activation of a fan (up to 100 W)
Optional dimmer function (up to 500 W) or activation (up to 3.5 kW) for an
additional output (e.g. an infrared lamp or infrared heat plates)

WORLD OF WELLNESS
Instructions for installation and use p. 10/50
Remote start function
The remote start function is deactivated ex-works. When the remote start func-

unit may only be used for operating and controlling a sauna heater which

19.101 of EN 60335-2-53. Alternatively, a suitable safety shut-off device can
be installed in or above the heater. Activation of the remote start function
must be carried out by an electrician (see 8.4. Activating/deactivating the
remote start function on page 30).
Status output
Automatic heating period limiter
If the operating unit has been running continuously for 6 hours, the sauna
control unit switches off all the consumers for safety reasons. The operating
unit goes into standby mode.
Post-drying programme
-
cally to prevent mould or rot from forming in the sauna room. This involves
heating the sauna room to 80 °C with the fan running for 30 minutes.
Excess temperature fuse
The excess temperature fuse is installed in the housing for the heater sen-
sor. Should the sauna heater continue heating after reaching the preferred
temperature due to a defect, the excess temperature fuse switches the sauna
heater off at a temperature of approx. 139 °C.
3.4. Sauna operating modes
The sauna control unit just sauna combi provides two operating modes, sauna
mode and combi mode.

WORLD OF WELLNESS
EN
Instructions for installation and use p. 11/50
Sauna mode
Dry heat is provided in sauna mode. The temperature in the room is high (80 to
100 °C) The humidity level of maximum 10% is low.
Combi mode
The evaporator operates along with the sauna heater in combi mode. The
temperature in the sauna room is lower (approx. 40 to 65 °C) than in sauna
mode, with the relative humidity being considerably higher, spanning 35% to
approximately 70%. The maximum humidity level which can be set depends on
the temperature of the sauna. The higher the sauna temperature, the lower the
maximum humidity level which can be set.
3.5. Sensor operating modes
The sauna control unit can be operated with one or two sensors. A temperature
sensor (bench sensor, F2) or a humidity sensor (FTS2) can be used as the
second sensor.
Single-sensor mode (F1)

time (see 8.2. Activating single-sensor mode on page 29).
In single-sensor mode, the sauna control unit is operated with the heater sensor
with excess temperature fuse (F1) only. This is included in the scope of delivery.
In single-sensor mode, the sauna control unit only displays the set temperature.
The actual temperature is not displayed.
The maximum humidity level which can be set in single-sensor mode is based
on the temperature above the heater and the humidity is timed. Only the set
value for the humidity level (in % of relative humidity) is displayed by the sauna
control unit. The actual humidity level in the sauna room when humidity is timed
depends on the size of the room and the evaporator capacity, and may deviate
from the set value.

WORLD OF WELLNESS
Instructions for installation and use p. 12/50
Two-sensor mode with bench sensor (F2)
In two-sensor mode with bench sensor, a second temperature sensor (bench
sensor) is installed above the rear sauna bench. The sauna control unit displays
the temperature measured by the bench sensor as the actual temperature.
In two-sensor mode with bench sensor, the humidity is timed. Only the set
value for the humidity level (in % of relative humidity) is displayed by the sauna
control unit. The actual humidity level in the sauna room when humidity is timed
depends on the size of the room and the evaporator capacity, and may deviate
from the set value.
Two-sensor mode with humidity temperature sensor (FTS2)
When a humidity temperature sensor is used in two-sensor mode, the sauna
control unit displays the temperature which is measured by the humidity tem-
perature sensor as the actual temperature.
In two-sensor mode with humidity temperature sensor, the evaporator is regu-
lated in accordance with the humidity level measured in the sauna room. The
actual value for the humidity level (in % of relative humidity) is displayed by the
sauna control unit.

WORLD OF WELLNESS
EN
Installation instructions, only for experts p. 13/50
4.Installation
Observe the following points when installing the sauna control unit:
The sauna control unit must be installed outside the sauna room or in accord-
ance with the recommendation issued by the sauna manufacturer.
The ambient temperature must be within a range spanning -10 °C to +40 °C.
The sensors may only be connected using the sensor wires provided with the
unit, which are heat-resistant up to 150 °C.
ATTENTION!
Damage to the unit
The sauna control unit is protected against jets of water, however direct contact
with water could still damage the unit.
Install the sauna control unit in a dry place at which a maximum humidity of
95% is not exceeded.
The sensor wires may be extended under the following conditions:
When a silicon wire resistant to temperatures up to 150 °C is used.
The minimum cross-section of the wire totals 0.75 mm2.
The length of the heater sensor wires may NOT exceed 10 m.
ATTENTION!
Sources of interference can have a negative effect on signal transmission
Lay all sensor wires separately from other mains wires and control wires.
Protect wires with only one layer of insulation by using a pipe (double insulation).

WORLD OF WELLNESS
Installation instructions, only for experts p. 14/50
Fig. 1 Position of the attachment device and the installation holes
(dimensions in mm)
C
4.1. Installing the power unit
1. Screw two Phillips-head screws (16 mm) into the wall of the sauna at a height
of approx. 1.70 m to a distance of up to 7 mm. The two screws must be
placed at an interval of 145 mm to each other (see Fig. 1).
2. Press the clip locks Cin lightly using a screwdriver and remove the cover
from the housing (see Fig. 2).
3. Fasten the sauna control unit onto the Phillips-head screws using the at-
tachment device Aas an aid (see Fig. 1).
4. Screw two Phillips-head screws (16 mm) into the lower fastening holes B
(see Fig. 1).
82
80
34
175
145
34
43
40
A
B
Fig. 2 Removing the cover from the housing

WORLD OF WELLNESS
EN
Installation instructions, only for experts p. 15/50
Don walls up

using screws which are screwed into the fastening holes B.
C Operating unit
D Fixing plates
Fig. 3 Installing the operating unit
A
C
D
B
A Installation frame
B Fastening holes
4.2. Installing the operating unit

WORLD OF WELLNESS
Installation instructions, only for experts p. 16/50
To install the operating unit, perform the following steps:
1. Prepare an installation cut-out (213 x 82 mm) in the wall of the sauna.
2. Place the installation frame Ainto the installation cut-out.
3. Doutwards using
a screwdriver.
4. Lay the RJ-12 cable in the wall of the sauna room, leading it from the power
unit installation location to the installation cut-out for the operating unit.
5. Connect the plug of the RJ-12 cable to the connection socket on the rear
of the operating unit.
6. Place the operating unit Cinto the installation frame A.
4.3. Installing the heater sensor F1 with excess temperature fuse
Observe the following points when installing the heater sensor:
The heater sensor must be installed on the rear of the heater, above the mid-
dle of the sauna heater. An interval of approx. 15 cm to the roof of the sauna
room must be maintained.
 
of air.
To install the heater sensor, perform the following steps (see Fig. 4):
1. Lay the two 2-pin heater sensor wires in the wall of the sauna room, leading

wires using wire clips.
2. Pull the two half-shells 1of the heater sensor apart.
3. Connect the four connectors for the heater sensor wire 5in accordance
with the Fig. 4.
4. Place the connection panel 2crossways (as shown in Fig. 4) in the heater
sensor half-shells.

WORLD OF WELLNESS
EN
Installation instructions, only for experts p. 17/50
5. Place the two half-shells together, screw them together using the two Phillips-
head screws 3(9 mm) and check whether the heater sensor has been
securely closed.
6. Install the heater sensor on the rear of the heater using the two wood screws
enclosed 6(16 mm).
1Heater sensor half-shells
2Connection panel
3Phillips-head screws (9 mm)
4Heater sensor
5Heater sensor wires
6Wood screws (16 mm)
Fig. 4 Installing the heater sensor (F1)
Red White White Red
4.4. Installing bench sensor F2 (optional)
The bench sensor must be installed on the wall of the sauna room, above the
rear bench seat. An interval of approx. 15 cm to the roof of the sauna room must
be maintained.
To install the bench sensor, perform the following steps:
1. Lay the two 2-pin bench sensor wires in the wall of the sauna room, leading

wires using wire clips.

WORLD OF WELLNESS
Installation instructions, only for experts p. 18/50
2. Pull the two half-shells of the bench sensor apart.
3. Connect the two connectors for the bench sensor wire to the two middle
terminals on the connection panel.
4. Place the connection panel crossways in the bench sensor half-shells.
5. Place the two half-shells together and screw them together using the two
Phillips-head screws (9 mm).
6. Check whether the bench sensor has been securely closed.
7. Install the bench sensor on the wall of the sauna room using the two wood
screws enclosed (16 mm). Maintain an interval of 15 cm to the roof of the
sauna room.
4.5. Installing humidity temperature sensor FTS2 (optional)
The humidity temperature sensor must be installed on the wall of the sauna
room above the rear bench seat. An interval of approx. 15 cm to the roof of the
sauna must be maintained.
To install the humidity temperature sensor, perform the following steps:
1. Lay the two 5-pin bench sensor wires in the wall of the sauna room, leading

sensor wires using wire clips.
2. Install the humidity temperature sensor to the wall of the sauna room using
the two wood screws enclosed (16 mm). Maintain an interval of 15 cm to
the roof of the sauna room.

WORLD OF WELLNESS
EN
Installation instructions, only for experts p. 19/50
4.6. Installing the foil sensor (optional)
If one of the following infrared heat plates is connected to an additional output,
the foil sensor P-ISX-FF must be used:
IR-WP-100
IR-WP-175
IR-WP-390
IR-WP-510
IR-WPHL-100
IR-WPHL-175
IR-WPHL-390
IR-WPHL-510
When installing the foil sensor, observe the operating instructions for the
infrared heat plates.
Use of a foil sensor must be activated when starting up the sauna for the
8.6. Activating/deactivating the foil sensor on page 31).

WORLD OF WELLNESS
Installation instructions, only for experts p. 20/50
5.Electrical connection
ATTENTION!
Damage to the unit
The sauna control unit may only be used for operating and controlling 3 heat-
ing circuits with a maximum heating capacity of 3.5 kW per heating circuit.
The maximum evaporator capacity totals 3.5 kW. The maximum additional
output capacity totals 3.5 kW.
1
2
5
4
6
7
c
8
9
a
b
d
e
f
g
1Low-voltage connection area
2Terminal strips for safety shut-off device,
remote start, status output and sensor wires
3Connection socket for operating unit
4 Function selection switch
5Cable bushing for operating unit, F2 and
foil sensors
6Cable bushing for F1 and FTS2 sensor and
status output
7Cable bushing for safety shut-off device and
remote start
8Cable bushing for evaporator wire
and additional output
9Cable bushing for heater wire
aCable bushing for power supply cable
bCable bushing for power booster
cCable bushing for lights and fan
dTerminal strip for heater and evaporator wires,
power supply cable and additional device
eTerminal strip for lights and fan
fTerminal strip for power booster
gConnection area for 230 V / 400 V
hEarth rail
3
h